elxr/i.js

/* Version: 1.0.0 - December 2, 2021 21:12:33 */
'use strict';

var path$1 = require('path');
var crypto = require('crypto');
var childProcess = require('child_process');
var fs$1 = require('fs');
var readline = require('readline');
var os = require('os');
var tty = require('tty');
var require$$0 = require('util');
var require$$0$1 = require('events');
var assert = require('assert');
var https = require('https');
var http = require('http');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var path__default = /*#__PURE__*/_interopDefaultLegacy(path$1);
var crypto__default = /*#__PURE__*/_interopDefaultLegacy(crypto);
var childProcess__default = /*#__PURE__*/_interopDefaultLegacy(childProcess);
var fs__default = /*#__PURE__*/_interopDefaultLegacy(fs$1);
var readline__default = /*#__PURE__*/_interopDefaultLegacy(readline);
var os__default = /*#__PURE__*/_interopDefaultLegacy(os);
var tty__default = /*#__PURE__*/_interopDefaultLegacy(tty);
var require$$0__default = /*#__PURE__*/_interopDefaultLegacy(require$$0);
var require$$0__default$1 = /*#__PURE__*/_interopDefaultLegacy(require$$0$1);
var assert__default = /*#__PURE__*/_interopDefaultLegacy(assert);
var https__default = /*#__PURE__*/_interopDefaultLegacy(https);
var http__default = /*#__PURE__*/_interopDefaultLegacy(http);

var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function getAugmentedNamespace(n) {
	if (n.__esModule) return n;
	var a = Object.defineProperty({}, '__esModule', {value: true});
	Object.keys(n).forEach(function (k) {
		var d = Object.getOwnPropertyDescriptor(n, k);
		Object.defineProperty(a, k, d.get ? d : {
			enumerable: true,
			get: function () {
				return n[k];
			}
		});
	});
	return a;
}

function createCommonjsModule(fn, basedir, module) {
	return module = {
		path: basedir,
		exports: {},
		require: function (path, base) {
			return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
		}
	}, fn(module, module.exports), module.exports;
}

function commonjsRegister (path, loader) {
	DYNAMIC_REQUIRE_LOADERS[path] = loader;
}

const DYNAMIC_REQUIRE_LOADERS = Object.create(null);
const DYNAMIC_REQUIRE_CACHE = Object.create(null);
const DEFAULT_PARENT_MODULE = {
	id: '<' + 'rollup>', exports: {}, parent: undefined, filename: null, loaded: false, children: [], paths: []
};
const CHECKED_EXTENSIONS = ['', '.js', '.json'];

function normalize (path) {
	path = path.replace(/\\/g, '/');
	const parts = path.split('/');
	const slashed = parts[0] === '';
	for (let i = 1; i < parts.length; i++) {
		if (parts[i] === '.' || parts[i] === '') {
			parts.splice(i--, 1);
		}
	}
	for (let i = 1; i < parts.length; i++) {
		if (parts[i] !== '..') continue;
		if (i > 0 && parts[i - 1] !== '..' && parts[i - 1] !== '.') {
			parts.splice(--i, 2);
			i--;
		}
	}
	path = parts.join('/');
	if (slashed && path[0] !== '/')
	  path = '/' + path;
	else if (path.length === 0)
	  path = '.';
	return path;
}

function join () {
	if (arguments.length === 0)
	  return '.';
	let joined;
	for (let i = 0; i < arguments.length; ++i) {
	  let arg = arguments[i];
	  if (arg.length > 0) {
		if (joined === undefined)
		  joined = arg;
		else
		  joined += '/' + arg;
	  }
	}
	if (joined === undefined)
	  return '.';

	return joined;
}

function isPossibleNodeModulesPath (modulePath) {
	let c0 = modulePath[0];
	if (c0 === '/' || c0 === '\\') return false;
	let c1 = modulePath[1], c2 = modulePath[2];
	if ((c0 === '.' && (!c1 || c1 === '/' || c1 === '\\')) ||
		(c0 === '.' && c1 === '.' && (!c2 || c2 === '/' || c2 === '\\'))) return false;
	if (c1 === ':' && (c2 === '/' || c2 === '\\'))
		return false;
	return true;
}

function dirname (path) {
  if (path.length === 0)
    return '.';

  let i = path.length - 1;
  while (i > 0) {
    const c = path.charCodeAt(i);
    if ((c === 47 || c === 92) && i !== path.length - 1)
      break;
    i--;
  }

  if (i > 0)
    return path.substr(0, i);

  if (path.chartCodeAt(0) === 47 || path.chartCodeAt(0) === 92)
    return path.charAt(0);

  return '.';
}

function commonjsResolveImpl (path, originalModuleDir, testCache) {
	const shouldTryNodeModules = isPossibleNodeModulesPath(path);
	path = normalize(path);
	let relPath;
	if (path[0] === '/') {
		originalModuleDir = '/';
	}
	while (true) {
		if (!shouldTryNodeModules) {
			relPath = originalModuleDir ? normalize(originalModuleDir + '/' + path) : path;
		} else if (originalModuleDir) {
			relPath = normalize(originalModuleDir + '/node_modules/' + path);
		} else {
			relPath = normalize(join('node_modules', path));
		}

		if (relPath.endsWith('/..')) {
			break; // Travelled too far up, avoid infinite loop
		}

		for (let extensionIndex = 0; extensionIndex < CHECKED_EXTENSIONS.length; extensionIndex++) {
			const resolvedPath = relPath + CHECKED_EXTENSIONS[extensionIndex];
			if (DYNAMIC_REQUIRE_CACHE[resolvedPath]) {
				return resolvedPath;
			}			if (DYNAMIC_REQUIRE_LOADERS[resolvedPath]) {
				return resolvedPath;
			}		}
		if (!shouldTryNodeModules) break;
		const nextDir = normalize(originalModuleDir + '/..');
		if (nextDir === originalModuleDir) break;
		originalModuleDir = nextDir;
	}
	return null;
}

function commonjsResolve (path, originalModuleDir) {
	const resolvedPath = commonjsResolveImpl(path, originalModuleDir);
	if (resolvedPath !== null) {
		return resolvedPath;
	}
	return require.resolve(path);
}

function commonjsRequire (path, originalModuleDir) {
	const resolvedPath = commonjsResolveImpl(path, originalModuleDir);
	if (resolvedPath !== null) {
    let cachedModule = DYNAMIC_REQUIRE_CACHE[resolvedPath];
    if (cachedModule) return cachedModule.exports;
    const loader = DYNAMIC_REQUIRE_LOADERS[resolvedPath];
    if (loader) {
      DYNAMIC_REQUIRE_CACHE[resolvedPath] = cachedModule = {
        id: resolvedPath,
        filename: resolvedPath,
        path: dirname(resolvedPath),
        exports: {},
        parent: DEFAULT_PARENT_MODULE,
        loaded: false,
        children: [],
        paths: [],
        require: function (path, base) {
          return commonjsRequire(path, (base === undefined || base === null) ? cachedModule.path : base);
        }
      };
      try {
        loader.call(commonjsGlobal, cachedModule, cachedModule.exports);
      } catch (error) {
        delete DYNAMIC_REQUIRE_CACHE[resolvedPath];
        throw error;
      }
      cachedModule.loaded = true;
      return cachedModule.exports;
    }	}
	return require(path);
}

commonjsRequire.cache = DYNAMIC_REQUIRE_CACHE;
commonjsRequire.resolve = commonjsResolve;

/**
 * This method returns the first argument it receives.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Util
 * @param {*} value Any value.
 * @returns {*} Returns `value`.
 * @example
 *
 * var object = { 'a': 1 };
 *
 * console.log(_.identity(object) === object);
 * // => true
 */
function identity(value) {
  return value;
}

var identity_1 = identity;

/** Detect free variable `global` from Node.js. */

var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;

var _freeGlobal = freeGlobal;

/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;

/** Used as a reference to the global object. */
var root = _freeGlobal || freeSelf || Function('return this')();

var _root = root;

/** Built-in value references. */
var Symbol$1 = _root.Symbol;

var _Symbol = Symbol$1;

/** Used for built-in method references. */
var objectProto$h = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$e = objectProto$h.hasOwnProperty;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString$1 = objectProto$h.toString;

/** Built-in value references. */
var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;

/**
 * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the raw `toStringTag`.
 */
function getRawTag(value) {
  var isOwn = hasOwnProperty$e.call(value, symToStringTag$1),
      tag = value[symToStringTag$1];

  try {
    value[symToStringTag$1] = undefined;
    var unmasked = true;
  } catch (e) {}

  var result = nativeObjectToString$1.call(value);
  if (unmasked) {
    if (isOwn) {
      value[symToStringTag$1] = tag;
    } else {
      delete value[symToStringTag$1];
    }
  }
  return result;
}

var _getRawTag = getRawTag;

/** Used for built-in method references. */
var objectProto$g = Object.prototype;

/**
 * Used to resolve the
 * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
 * of values.
 */
var nativeObjectToString = objectProto$g.toString;

/**
 * Converts `value` to a string using `Object.prototype.toString`.
 *
 * @private
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 */
function objectToString(value) {
  return nativeObjectToString.call(value);
}

var _objectToString = objectToString;

/** `Object#toString` result references. */
var nullTag = '[object Null]',
    undefinedTag = '[object Undefined]';

/** Built-in value references. */
var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;

/**
 * The base implementation of `getTag` without fallbacks for buggy environments.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
function baseGetTag(value) {
  if (value == null) {
    return value === undefined ? undefinedTag : nullTag;
  }
  return (symToStringTag && symToStringTag in Object(value))
    ? _getRawTag(value)
    : _objectToString(value);
}

var _baseGetTag = baseGetTag;

/**
 * Checks if `value` is the
 * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
 * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an object, else `false`.
 * @example
 *
 * _.isObject({});
 * // => true
 *
 * _.isObject([1, 2, 3]);
 * // => true
 *
 * _.isObject(_.noop);
 * // => true
 *
 * _.isObject(null);
 * // => false
 */
function isObject$1(value) {
  var type = typeof value;
  return value != null && (type == 'object' || type == 'function');
}

var isObject_1 = isObject$1;

/** `Object#toString` result references. */
var asyncTag = '[object AsyncFunction]',
    funcTag$2 = '[object Function]',
    genTag$1 = '[object GeneratorFunction]',
    proxyTag = '[object Proxy]';

/**
 * Checks if `value` is classified as a `Function` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a function, else `false`.
 * @example
 *
 * _.isFunction(_);
 * // => true
 *
 * _.isFunction(/abc/);
 * // => false
 */
function isFunction(value) {
  if (!isObject_1(value)) {
    return false;
  }
  // The use of `Object#toString` avoids issues with the `typeof` operator
  // in Safari 9 which returns 'object' for typed arrays and other constructors.
  var tag = _baseGetTag(value);
  return tag == funcTag$2 || tag == genTag$1 || tag == asyncTag || tag == proxyTag;
}

var isFunction_1 = isFunction;

/** Used to detect overreaching core-js shims. */
var coreJsData = _root['__core-js_shared__'];

var _coreJsData = coreJsData;

/** Used to detect methods masquerading as native. */
var maskSrcKey = (function() {
  var uid = /[^.]+$/.exec(_coreJsData && _coreJsData.keys && _coreJsData.keys.IE_PROTO || '');
  return uid ? ('Symbol(src)_1.' + uid) : '';
}());

/**
 * Checks if `func` has its source masked.
 *
 * @private
 * @param {Function} func The function to check.
 * @returns {boolean} Returns `true` if `func` is masked, else `false`.
 */
function isMasked(func) {
  return !!maskSrcKey && (maskSrcKey in func);
}

var _isMasked = isMasked;

/** Used for built-in method references. */
var funcProto$2 = Function.prototype;

/** Used to resolve the decompiled source of functions. */
var funcToString$2 = funcProto$2.toString;

/**
 * Converts `func` to its source code.
 *
 * @private
 * @param {Function} func The function to convert.
 * @returns {string} Returns the source code.
 */
function toSource(func) {
  if (func != null) {
    try {
      return funcToString$2.call(func);
    } catch (e) {}
    try {
      return (func + '');
    } catch (e) {}
  }
  return '';
}

var _toSource = toSource;

/**
 * Used to match `RegExp`
 * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
 */
var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;

/** Used to detect host constructors (Safari). */
var reIsHostCtor = /^\[object .+?Constructor\]$/;

/** Used for built-in method references. */
var funcProto$1 = Function.prototype,
    objectProto$f = Object.prototype;

/** Used to resolve the decompiled source of functions. */
var funcToString$1 = funcProto$1.toString;

/** Used to check objects for own properties. */
var hasOwnProperty$d = objectProto$f.hasOwnProperty;

/** Used to detect if a method is native. */
var reIsNative = RegExp('^' +
  funcToString$1.call(hasOwnProperty$d).replace(reRegExpChar, '\\$&')
  .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
);

/**
 * The base implementation of `_.isNative` without bad shim checks.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a native function,
 *  else `false`.
 */
function baseIsNative(value) {
  if (!isObject_1(value) || _isMasked(value)) {
    return false;
  }
  var pattern = isFunction_1(value) ? reIsNative : reIsHostCtor;
  return pattern.test(_toSource(value));
}

var _baseIsNative = baseIsNative;

/**
 * Gets the value at `key` of `object`.
 *
 * @private
 * @param {Object} [object] The object to query.
 * @param {string} key The key of the property to get.
 * @returns {*} Returns the property value.
 */
function getValue(object, key) {
  return object == null ? undefined : object[key];
}

var _getValue = getValue;

/**
 * Gets the native function at `key` of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {string} key The key of the method to get.
 * @returns {*} Returns the function if it's native, else `undefined`.
 */
function getNative(object, key) {
  var value = _getValue(object, key);
  return _baseIsNative(value) ? value : undefined;
}

var _getNative = getNative;

/* Built-in method references that are verified to be native. */
var WeakMap$1 = _getNative(_root, 'WeakMap');

var _WeakMap = WeakMap$1;

/** Used to store function metadata. */
var metaMap = _WeakMap && new _WeakMap;

var _metaMap = metaMap;

/**
 * The base implementation of `setData` without support for hot loop shorting.
 *
 * @private
 * @param {Function} func The function to associate metadata with.
 * @param {*} data The metadata.
 * @returns {Function} Returns `func`.
 */
var baseSetData = !_metaMap ? identity_1 : function(func, data) {
  _metaMap.set(func, data);
  return func;
};

var _baseSetData = baseSetData;

/** Built-in value references. */
var objectCreate = Object.create;

/**
 * The base implementation of `_.create` without support for assigning
 * properties to the created object.
 *
 * @private
 * @param {Object} proto The object to inherit from.
 * @returns {Object} Returns the new object.
 */
var baseCreate = (function() {
  function object() {}
  return function(proto) {
    if (!isObject_1(proto)) {
      return {};
    }
    if (objectCreate) {
      return objectCreate(proto);
    }
    object.prototype = proto;
    var result = new object;
    object.prototype = undefined;
    return result;
  };
}());

var _baseCreate = baseCreate;

/**
 * Creates a function that produces an instance of `Ctor` regardless of
 * whether it was invoked as part of a `new` expression or by `call` or `apply`.
 *
 * @private
 * @param {Function} Ctor The constructor to wrap.
 * @returns {Function} Returns the new wrapped function.
 */
function createCtor(Ctor) {
  return function() {
    // Use a `switch` statement to work with class constructors. See
    // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
    // for more details.
    var args = arguments;
    switch (args.length) {
      case 0: return new Ctor;
      case 1: return new Ctor(args[0]);
      case 2: return new Ctor(args[0], args[1]);
      case 3: return new Ctor(args[0], args[1], args[2]);
      case 4: return new Ctor(args[0], args[1], args[2], args[3]);
      case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
      case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
      case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
    }
    var thisBinding = _baseCreate(Ctor.prototype),
        result = Ctor.apply(thisBinding, args);

    // Mimic the constructor's `return` behavior.
    // See https://es5.github.io/#x13.2.2 for more details.
    return isObject_1(result) ? result : thisBinding;
  };
}

var _createCtor = createCtor;

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG$6 = 1;

/**
 * Creates a function that wraps `func` to invoke it with the optional `this`
 * binding of `thisArg`.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @param {*} [thisArg] The `this` binding of `func`.
 * @returns {Function} Returns the new wrapped function.
 */
function createBind(func, bitmask, thisArg) {
  var isBind = bitmask & WRAP_BIND_FLAG$6,
      Ctor = _createCtor(func);

  function wrapper() {
    var fn = (this && this !== _root && this instanceof wrapper) ? Ctor : func;
    return fn.apply(isBind ? thisArg : this, arguments);
  }
  return wrapper;
}

var _createBind = createBind;

/**
 * A faster alternative to `Function#apply`, this function invokes `func`
 * with the `this` binding of `thisArg` and the arguments of `args`.
 *
 * @private
 * @param {Function} func The function to invoke.
 * @param {*} thisArg The `this` binding of `func`.
 * @param {Array} args The arguments to invoke `func` with.
 * @returns {*} Returns the result of `func`.
 */
function apply(func, thisArg, args) {
  switch (args.length) {
    case 0: return func.call(thisArg);
    case 1: return func.call(thisArg, args[0]);
    case 2: return func.call(thisArg, args[0], args[1]);
    case 3: return func.call(thisArg, args[0], args[1], args[2]);
  }
  return func.apply(thisArg, args);
}

var _apply = apply;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$3 = Math.max;

/**
 * Creates an array that is the composition of partially applied arguments,
 * placeholders, and provided arguments into a single array of arguments.
 *
 * @private
 * @param {Array} args The provided arguments.
 * @param {Array} partials The arguments to prepend to those provided.
 * @param {Array} holders The `partials` placeholder indexes.
 * @params {boolean} [isCurried] Specify composing for a curried function.
 * @returns {Array} Returns the new array of composed arguments.
 */
function composeArgs(args, partials, holders, isCurried) {
  var argsIndex = -1,
      argsLength = args.length,
      holdersLength = holders.length,
      leftIndex = -1,
      leftLength = partials.length,
      rangeLength = nativeMax$3(argsLength - holdersLength, 0),
      result = Array(leftLength + rangeLength),
      isUncurried = !isCurried;

  while (++leftIndex < leftLength) {
    result[leftIndex] = partials[leftIndex];
  }
  while (++argsIndex < holdersLength) {
    if (isUncurried || argsIndex < argsLength) {
      result[holders[argsIndex]] = args[argsIndex];
    }
  }
  while (rangeLength--) {
    result[leftIndex++] = args[argsIndex++];
  }
  return result;
}

var _composeArgs = composeArgs;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$2 = Math.max;

/**
 * This function is like `composeArgs` except that the arguments composition
 * is tailored for `_.partialRight`.
 *
 * @private
 * @param {Array} args The provided arguments.
 * @param {Array} partials The arguments to append to those provided.
 * @param {Array} holders The `partials` placeholder indexes.
 * @params {boolean} [isCurried] Specify composing for a curried function.
 * @returns {Array} Returns the new array of composed arguments.
 */
function composeArgsRight(args, partials, holders, isCurried) {
  var argsIndex = -1,
      argsLength = args.length,
      holdersIndex = -1,
      holdersLength = holders.length,
      rightIndex = -1,
      rightLength = partials.length,
      rangeLength = nativeMax$2(argsLength - holdersLength, 0),
      result = Array(rangeLength + rightLength),
      isUncurried = !isCurried;

  while (++argsIndex < rangeLength) {
    result[argsIndex] = args[argsIndex];
  }
  var offset = argsIndex;
  while (++rightIndex < rightLength) {
    result[offset + rightIndex] = partials[rightIndex];
  }
  while (++holdersIndex < holdersLength) {
    if (isUncurried || argsIndex < argsLength) {
      result[offset + holders[holdersIndex]] = args[argsIndex++];
    }
  }
  return result;
}

var _composeArgsRight = composeArgsRight;

/**
 * Gets the number of `placeholder` occurrences in `array`.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} placeholder The placeholder to search for.
 * @returns {number} Returns the placeholder count.
 */
function countHolders(array, placeholder) {
  var length = array.length,
      result = 0;

  while (length--) {
    if (array[length] === placeholder) {
      ++result;
    }
  }
  return result;
}

var _countHolders = countHolders;

/**
 * The function whose prototype chain sequence wrappers inherit from.
 *
 * @private
 */
function baseLodash() {
  // No operation performed.
}

var _baseLodash = baseLodash;

/** Used as references for the maximum length and index of an array. */
var MAX_ARRAY_LENGTH = 4294967295;

/**
 * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
 *
 * @private
 * @constructor
 * @param {*} value The value to wrap.
 */
function LazyWrapper(value) {
  this.__wrapped__ = value;
  this.__actions__ = [];
  this.__dir__ = 1;
  this.__filtered__ = false;
  this.__iteratees__ = [];
  this.__takeCount__ = MAX_ARRAY_LENGTH;
  this.__views__ = [];
}

// Ensure `LazyWrapper` is an instance of `baseLodash`.
LazyWrapper.prototype = _baseCreate(_baseLodash.prototype);
LazyWrapper.prototype.constructor = LazyWrapper;

var _LazyWrapper = LazyWrapper;

/**
 * This method returns `undefined`.
 *
 * @static
 * @memberOf _
 * @since 2.3.0
 * @category Util
 * @example
 *
 * _.times(2, _.noop);
 * // => [undefined, undefined]
 */
function noop() {
  // No operation performed.
}

var noop_1 = noop;

/**
 * Gets metadata for `func`.
 *
 * @private
 * @param {Function} func The function to query.
 * @returns {*} Returns the metadata for `func`.
 */
var getData = !_metaMap ? noop_1 : function(func) {
  return _metaMap.get(func);
};

var _getData = getData;

/** Used to lookup unminified function names. */
var realNames = {};

var _realNames = realNames;

/** Used for built-in method references. */
var objectProto$e = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$c = objectProto$e.hasOwnProperty;

/**
 * Gets the name of `func`.
 *
 * @private
 * @param {Function} func The function to query.
 * @returns {string} Returns the function name.
 */
function getFuncName(func) {
  var result = (func.name + ''),
      array = _realNames[result],
      length = hasOwnProperty$c.call(_realNames, result) ? array.length : 0;

  while (length--) {
    var data = array[length],
        otherFunc = data.func;
    if (otherFunc == null || otherFunc == func) {
      return data.name;
    }
  }
  return result;
}

var _getFuncName = getFuncName;

/**
 * The base constructor for creating `lodash` wrapper objects.
 *
 * @private
 * @param {*} value The value to wrap.
 * @param {boolean} [chainAll] Enable explicit method chain sequences.
 */
function LodashWrapper(value, chainAll) {
  this.__wrapped__ = value;
  this.__actions__ = [];
  this.__chain__ = !!chainAll;
  this.__index__ = 0;
  this.__values__ = undefined;
}

LodashWrapper.prototype = _baseCreate(_baseLodash.prototype);
LodashWrapper.prototype.constructor = LodashWrapper;

var _LodashWrapper = LodashWrapper;

/**
 * Checks if `value` is classified as an `Array` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an array, else `false`.
 * @example
 *
 * _.isArray([1, 2, 3]);
 * // => true
 *
 * _.isArray(document.body.children);
 * // => false
 *
 * _.isArray('abc');
 * // => false
 *
 * _.isArray(_.noop);
 * // => false
 */
var isArray$3 = Array.isArray;

var isArray_1 = isArray$3;

/**
 * Checks if `value` is object-like. A value is object-like if it's not `null`
 * and has a `typeof` result of "object".
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
 * @example
 *
 * _.isObjectLike({});
 * // => true
 *
 * _.isObjectLike([1, 2, 3]);
 * // => true
 *
 * _.isObjectLike(_.noop);
 * // => false
 *
 * _.isObjectLike(null);
 * // => false
 */
function isObjectLike(value) {
  return value != null && typeof value == 'object';
}

var isObjectLike_1 = isObjectLike;

/**
 * Copies the values of `source` to `array`.
 *
 * @private
 * @param {Array} source The array to copy values from.
 * @param {Array} [array=[]] The array to copy values to.
 * @returns {Array} Returns `array`.
 */
function copyArray(source, array) {
  var index = -1,
      length = source.length;

  array || (array = Array(length));
  while (++index < length) {
    array[index] = source[index];
  }
  return array;
}

var _copyArray = copyArray;

/**
 * Creates a clone of `wrapper`.
 *
 * @private
 * @param {Object} wrapper The wrapper to clone.
 * @returns {Object} Returns the cloned wrapper.
 */
function wrapperClone(wrapper) {
  if (wrapper instanceof _LazyWrapper) {
    return wrapper.clone();
  }
  var result = new _LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
  result.__actions__ = _copyArray(wrapper.__actions__);
  result.__index__  = wrapper.__index__;
  result.__values__ = wrapper.__values__;
  return result;
}

var _wrapperClone = wrapperClone;

/** Used for built-in method references. */
var objectProto$d = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$b = objectProto$d.hasOwnProperty;

/**
 * Creates a `lodash` object which wraps `value` to enable implicit method
 * chain sequences. Methods that operate on and return arrays, collections,
 * and functions can be chained together. Methods that retrieve a single value
 * or may return a primitive value will automatically end the chain sequence
 * and return the unwrapped value. Otherwise, the value must be unwrapped
 * with `_#value`.
 *
 * Explicit chain sequences, which must be unwrapped with `_#value`, may be
 * enabled using `_.chain`.
 *
 * The execution of chained methods is lazy, that is, it's deferred until
 * `_#value` is implicitly or explicitly called.
 *
 * Lazy evaluation allows several methods to support shortcut fusion.
 * Shortcut fusion is an optimization to merge iteratee calls; this avoids
 * the creation of intermediate arrays and can greatly reduce the number of
 * iteratee executions. Sections of a chain sequence qualify for shortcut
 * fusion if the section is applied to an array and iteratees accept only
 * one argument. The heuristic for whether a section qualifies for shortcut
 * fusion is subject to change.
 *
 * Chaining is supported in custom builds as long as the `_#value` method is
 * directly or indirectly included in the build.
 *
 * In addition to lodash methods, wrappers have `Array` and `String` methods.
 *
 * The wrapper `Array` methods are:
 * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
 *
 * The wrapper `String` methods are:
 * `replace` and `split`
 *
 * The wrapper methods that support shortcut fusion are:
 * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
 * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
 * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
 *
 * The chainable wrapper methods are:
 * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
 * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
 * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
 * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
 * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
 * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
 * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
 * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
 * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
 * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
 * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
 * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
 * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
 * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
 * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
 * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
 * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
 * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
 * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
 * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
 * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
 * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
 * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
 * `zipObject`, `zipObjectDeep`, and `zipWith`
 *
 * The wrapper methods that are **not** chainable by default are:
 * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
 * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
 * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
 * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
 * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
 * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
 * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
 * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
 * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
 * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
 * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
 * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
 * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
 * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
 * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
 * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
 * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
 * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
 * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
 * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
 * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
 * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
 * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
 * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
 * `upperFirst`, `value`, and `words`
 *
 * @name _
 * @constructor
 * @category Seq
 * @param {*} value The value to wrap in a `lodash` instance.
 * @returns {Object} Returns the new `lodash` wrapper instance.
 * @example
 *
 * function square(n) {
 *   return n * n;
 * }
 *
 * var wrapped = _([1, 2, 3]);
 *
 * // Returns an unwrapped value.
 * wrapped.reduce(_.add);
 * // => 6
 *
 * // Returns a wrapped value.
 * var squares = wrapped.map(square);
 *
 * _.isArray(squares);
 * // => false
 *
 * _.isArray(squares.value());
 * // => true
 */
function lodash(value) {
  if (isObjectLike_1(value) && !isArray_1(value) && !(value instanceof _LazyWrapper)) {
    if (value instanceof _LodashWrapper) {
      return value;
    }
    if (hasOwnProperty$b.call(value, '__wrapped__')) {
      return _wrapperClone(value);
    }
  }
  return new _LodashWrapper(value);
}

// Ensure wrappers are instances of `baseLodash`.
lodash.prototype = _baseLodash.prototype;
lodash.prototype.constructor = lodash;

var wrapperLodash = lodash;

/**
 * Checks if `func` has a lazy counterpart.
 *
 * @private
 * @param {Function} func The function to check.
 * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
 *  else `false`.
 */
function isLaziable(func) {
  var funcName = _getFuncName(func),
      other = wrapperLodash[funcName];

  if (typeof other != 'function' || !(funcName in _LazyWrapper.prototype)) {
    return false;
  }
  if (func === other) {
    return true;
  }
  var data = _getData(other);
  return !!data && func === data[0];
}

var _isLaziable = isLaziable;

/** Used to detect hot functions by number of calls within a span of milliseconds. */
var HOT_COUNT = 800,
    HOT_SPAN = 16;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeNow = Date.now;

/**
 * Creates a function that'll short out and invoke `identity` instead
 * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
 * milliseconds.
 *
 * @private
 * @param {Function} func The function to restrict.
 * @returns {Function} Returns the new shortable function.
 */
function shortOut(func) {
  var count = 0,
      lastCalled = 0;

  return function() {
    var stamp = nativeNow(),
        remaining = HOT_SPAN - (stamp - lastCalled);

    lastCalled = stamp;
    if (remaining > 0) {
      if (++count >= HOT_COUNT) {
        return arguments[0];
      }
    } else {
      count = 0;
    }
    return func.apply(undefined, arguments);
  };
}

var _shortOut = shortOut;

/**
 * Sets metadata for `func`.
 *
 * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
 * period of time, it will trip its breaker and transition to an identity
 * function to avoid garbage collection pauses in V8. See
 * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
 * for more details.
 *
 * @private
 * @param {Function} func The function to associate metadata with.
 * @param {*} data The metadata.
 * @returns {Function} Returns `func`.
 */
var setData = _shortOut(_baseSetData);

var _setData = setData;

/** Used to match wrap detail comments. */
var reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
    reSplitDetails = /,? & /;

/**
 * Extracts wrapper details from the `source` body comment.
 *
 * @private
 * @param {string} source The source to inspect.
 * @returns {Array} Returns the wrapper details.
 */
function getWrapDetails(source) {
  var match = source.match(reWrapDetails);
  return match ? match[1].split(reSplitDetails) : [];
}

var _getWrapDetails = getWrapDetails;

/** Used to match wrap detail comments. */
var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/;

/**
 * Inserts wrapper `details` in a comment at the top of the `source` body.
 *
 * @private
 * @param {string} source The source to modify.
 * @returns {Array} details The details to insert.
 * @returns {string} Returns the modified source.
 */
function insertWrapDetails(source, details) {
  var length = details.length;
  if (!length) {
    return source;
  }
  var lastIndex = length - 1;
  details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
  details = details.join(length > 2 ? ', ' : ' ');
  return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
}

var _insertWrapDetails = insertWrapDetails;

/**
 * Creates a function that returns `value`.
 *
 * @static
 * @memberOf _
 * @since 2.4.0
 * @category Util
 * @param {*} value The value to return from the new function.
 * @returns {Function} Returns the new constant function.
 * @example
 *
 * var objects = _.times(2, _.constant({ 'a': 1 }));
 *
 * console.log(objects);
 * // => [{ 'a': 1 }, { 'a': 1 }]
 *
 * console.log(objects[0] === objects[1]);
 * // => true
 */
function constant(value) {
  return function() {
    return value;
  };
}

var constant_1 = constant;

var defineProperty = (function() {
  try {
    var func = _getNative(Object, 'defineProperty');
    func({}, '', {});
    return func;
  } catch (e) {}
}());

var _defineProperty = defineProperty;

/**
 * The base implementation of `setToString` without support for hot loop shorting.
 *
 * @private
 * @param {Function} func The function to modify.
 * @param {Function} string The `toString` result.
 * @returns {Function} Returns `func`.
 */
var baseSetToString = !_defineProperty ? identity_1 : function(func, string) {
  return _defineProperty(func, 'toString', {
    'configurable': true,
    'enumerable': false,
    'value': constant_1(string),
    'writable': true
  });
};

var _baseSetToString = baseSetToString;

/**
 * Sets the `toString` method of `func` to return `string`.
 *
 * @private
 * @param {Function} func The function to modify.
 * @param {Function} string The `toString` result.
 * @returns {Function} Returns `func`.
 */
var setToString = _shortOut(_baseSetToString);

var _setToString = setToString;

/**
 * A specialized version of `_.forEach` for arrays without support for
 * iteratee shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns `array`.
 */
function arrayEach(array, iteratee) {
  var index = -1,
      length = array == null ? 0 : array.length;

  while (++index < length) {
    if (iteratee(array[index], index, array) === false) {
      break;
    }
  }
  return array;
}

var _arrayEach = arrayEach;

/**
 * The base implementation of `_.findIndex` and `_.findLastIndex` without
 * support for iteratee shorthands.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {Function} predicate The function invoked per iteration.
 * @param {number} fromIndex The index to search from.
 * @param {boolean} [fromRight] Specify iterating from right to left.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function baseFindIndex(array, predicate, fromIndex, fromRight) {
  var length = array.length,
      index = fromIndex + (fromRight ? 1 : -1);

  while ((fromRight ? index-- : ++index < length)) {
    if (predicate(array[index], index, array)) {
      return index;
    }
  }
  return -1;
}

var _baseFindIndex = baseFindIndex;

/**
 * The base implementation of `_.isNaN` without support for number objects.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
 */
function baseIsNaN(value) {
  return value !== value;
}

var _baseIsNaN = baseIsNaN;

/**
 * A specialized version of `_.indexOf` which performs strict equality
 * comparisons of values, i.e. `===`.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} value The value to search for.
 * @param {number} fromIndex The index to search from.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function strictIndexOf(array, value, fromIndex) {
  var index = fromIndex - 1,
      length = array.length;

  while (++index < length) {
    if (array[index] === value) {
      return index;
    }
  }
  return -1;
}

var _strictIndexOf = strictIndexOf;

/**
 * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} value The value to search for.
 * @param {number} fromIndex The index to search from.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function baseIndexOf(array, value, fromIndex) {
  return value === value
    ? _strictIndexOf(array, value, fromIndex)
    : _baseFindIndex(array, _baseIsNaN, fromIndex);
}

var _baseIndexOf = baseIndexOf;

/**
 * A specialized version of `_.includes` for arrays without support for
 * specifying an index to search from.
 *
 * @private
 * @param {Array} [array] The array to inspect.
 * @param {*} target The value to search for.
 * @returns {boolean} Returns `true` if `target` is found, else `false`.
 */
function arrayIncludes(array, value) {
  var length = array == null ? 0 : array.length;
  return !!length && _baseIndexOf(array, value, 0) > -1;
}

var _arrayIncludes = arrayIncludes;

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG$5 = 1,
    WRAP_BIND_KEY_FLAG$4 = 2,
    WRAP_CURRY_FLAG$4 = 8,
    WRAP_CURRY_RIGHT_FLAG$2 = 16,
    WRAP_PARTIAL_FLAG$2 = 32,
    WRAP_PARTIAL_RIGHT_FLAG$2 = 64,
    WRAP_ARY_FLAG$3 = 128,
    WRAP_REARG_FLAG$2 = 256,
    WRAP_FLIP_FLAG$1 = 512;

/** Used to associate wrap methods with their bit flags. */
var wrapFlags = [
  ['ary', WRAP_ARY_FLAG$3],
  ['bind', WRAP_BIND_FLAG$5],
  ['bindKey', WRAP_BIND_KEY_FLAG$4],
  ['curry', WRAP_CURRY_FLAG$4],
  ['curryRight', WRAP_CURRY_RIGHT_FLAG$2],
  ['flip', WRAP_FLIP_FLAG$1],
  ['partial', WRAP_PARTIAL_FLAG$2],
  ['partialRight', WRAP_PARTIAL_RIGHT_FLAG$2],
  ['rearg', WRAP_REARG_FLAG$2]
];

/**
 * Updates wrapper `details` based on `bitmask` flags.
 *
 * @private
 * @returns {Array} details The details to modify.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @returns {Array} Returns `details`.
 */
function updateWrapDetails(details, bitmask) {
  _arrayEach(wrapFlags, function(pair) {
    var value = '_.' + pair[0];
    if ((bitmask & pair[1]) && !_arrayIncludes(details, value)) {
      details.push(value);
    }
  });
  return details.sort();
}

var _updateWrapDetails = updateWrapDetails;

/**
 * Sets the `toString` method of `wrapper` to mimic the source of `reference`
 * with wrapper details in a comment at the top of the source body.
 *
 * @private
 * @param {Function} wrapper The function to modify.
 * @param {Function} reference The reference function.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @returns {Function} Returns `wrapper`.
 */
function setWrapToString(wrapper, reference, bitmask) {
  var source = (reference + '');
  return _setToString(wrapper, _insertWrapDetails(source, _updateWrapDetails(_getWrapDetails(source), bitmask)));
}

var _setWrapToString = setWrapToString;

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG$4 = 1,
    WRAP_BIND_KEY_FLAG$3 = 2,
    WRAP_CURRY_BOUND_FLAG$1 = 4,
    WRAP_CURRY_FLAG$3 = 8,
    WRAP_PARTIAL_FLAG$1 = 32,
    WRAP_PARTIAL_RIGHT_FLAG$1 = 64;

/**
 * Creates a function that wraps `func` to continue currying.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @param {Function} wrapFunc The function to create the `func` wrapper.
 * @param {*} placeholder The placeholder value.
 * @param {*} [thisArg] The `this` binding of `func`.
 * @param {Array} [partials] The arguments to prepend to those provided to
 *  the new function.
 * @param {Array} [holders] The `partials` placeholder indexes.
 * @param {Array} [argPos] The argument positions of the new function.
 * @param {number} [ary] The arity cap of `func`.
 * @param {number} [arity] The arity of `func`.
 * @returns {Function} Returns the new wrapped function.
 */
function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
  var isCurry = bitmask & WRAP_CURRY_FLAG$3,
      newHolders = isCurry ? holders : undefined,
      newHoldersRight = isCurry ? undefined : holders,
      newPartials = isCurry ? partials : undefined,
      newPartialsRight = isCurry ? undefined : partials;

  bitmask |= (isCurry ? WRAP_PARTIAL_FLAG$1 : WRAP_PARTIAL_RIGHT_FLAG$1);
  bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG$1 : WRAP_PARTIAL_FLAG$1);

  if (!(bitmask & WRAP_CURRY_BOUND_FLAG$1)) {
    bitmask &= ~(WRAP_BIND_FLAG$4 | WRAP_BIND_KEY_FLAG$3);
  }
  var newData = [
    func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
    newHoldersRight, argPos, ary, arity
  ];

  var result = wrapFunc.apply(undefined, newData);
  if (_isLaziable(func)) {
    _setData(result, newData);
  }
  result.placeholder = placeholder;
  return _setWrapToString(result, func, bitmask);
}

var _createRecurry = createRecurry;

/**
 * Gets the argument placeholder value for `func`.
 *
 * @private
 * @param {Function} func The function to inspect.
 * @returns {*} Returns the placeholder value.
 */
function getHolder(func) {
  var object = func;
  return object.placeholder;
}

var _getHolder = getHolder;

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$1 = 9007199254740991;

/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;

/**
 * Checks if `value` is a valid array-like index.
 *
 * @private
 * @param {*} value The value to check.
 * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
 * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
 */
function isIndex(value, length) {
  var type = typeof value;
  length = length == null ? MAX_SAFE_INTEGER$1 : length;

  return !!length &&
    (type == 'number' ||
      (type != 'symbol' && reIsUint.test(value))) &&
        (value > -1 && value % 1 == 0 && value < length);
}

var _isIndex = isIndex;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin$1 = Math.min;

/**
 * Reorder `array` according to the specified indexes where the element at
 * the first index is assigned as the first element, the element at
 * the second index is assigned as the second element, and so on.
 *
 * @private
 * @param {Array} array The array to reorder.
 * @param {Array} indexes The arranged array indexes.
 * @returns {Array} Returns `array`.
 */
function reorder(array, indexes) {
  var arrLength = array.length,
      length = nativeMin$1(indexes.length, arrLength),
      oldArray = _copyArray(array);

  while (length--) {
    var index = indexes[length];
    array[length] = _isIndex(index, arrLength) ? oldArray[index] : undefined;
  }
  return array;
}

var _reorder = reorder;

/** Used as the internal argument placeholder. */
var PLACEHOLDER$1 = '__lodash_placeholder__';

/**
 * Replaces all `placeholder` elements in `array` with an internal placeholder
 * and returns an array of their indexes.
 *
 * @private
 * @param {Array} array The array to modify.
 * @param {*} placeholder The placeholder to replace.
 * @returns {Array} Returns the new array of placeholder indexes.
 */
function replaceHolders(array, placeholder) {
  var index = -1,
      length = array.length,
      resIndex = 0,
      result = [];

  while (++index < length) {
    var value = array[index];
    if (value === placeholder || value === PLACEHOLDER$1) {
      array[index] = PLACEHOLDER$1;
      result[resIndex++] = index;
    }
  }
  return result;
}

var _replaceHolders = replaceHolders;

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG$3 = 1,
    WRAP_BIND_KEY_FLAG$2 = 2,
    WRAP_CURRY_FLAG$2 = 8,
    WRAP_CURRY_RIGHT_FLAG$1 = 16,
    WRAP_ARY_FLAG$2 = 128,
    WRAP_FLIP_FLAG = 512;

/**
 * Creates a function that wraps `func` to invoke it with optional `this`
 * binding of `thisArg`, partial application, and currying.
 *
 * @private
 * @param {Function|string} func The function or method name to wrap.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @param {*} [thisArg] The `this` binding of `func`.
 * @param {Array} [partials] The arguments to prepend to those provided to
 *  the new function.
 * @param {Array} [holders] The `partials` placeholder indexes.
 * @param {Array} [partialsRight] The arguments to append to those provided
 *  to the new function.
 * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
 * @param {Array} [argPos] The argument positions of the new function.
 * @param {number} [ary] The arity cap of `func`.
 * @param {number} [arity] The arity of `func`.
 * @returns {Function} Returns the new wrapped function.
 */
function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
  var isAry = bitmask & WRAP_ARY_FLAG$2,
      isBind = bitmask & WRAP_BIND_FLAG$3,
      isBindKey = bitmask & WRAP_BIND_KEY_FLAG$2,
      isCurried = bitmask & (WRAP_CURRY_FLAG$2 | WRAP_CURRY_RIGHT_FLAG$1),
      isFlip = bitmask & WRAP_FLIP_FLAG,
      Ctor = isBindKey ? undefined : _createCtor(func);

  function wrapper() {
    var length = arguments.length,
        args = Array(length),
        index = length;

    while (index--) {
      args[index] = arguments[index];
    }
    if (isCurried) {
      var placeholder = _getHolder(wrapper),
          holdersCount = _countHolders(args, placeholder);
    }
    if (partials) {
      args = _composeArgs(args, partials, holders, isCurried);
    }
    if (partialsRight) {
      args = _composeArgsRight(args, partialsRight, holdersRight, isCurried);
    }
    length -= holdersCount;
    if (isCurried && length < arity) {
      var newHolders = _replaceHolders(args, placeholder);
      return _createRecurry(
        func, bitmask, createHybrid, wrapper.placeholder, thisArg,
        args, newHolders, argPos, ary, arity - length
      );
    }
    var thisBinding = isBind ? thisArg : this,
        fn = isBindKey ? thisBinding[func] : func;

    length = args.length;
    if (argPos) {
      args = _reorder(args, argPos);
    } else if (isFlip && length > 1) {
      args.reverse();
    }
    if (isAry && ary < length) {
      args.length = ary;
    }
    if (this && this !== _root && this instanceof wrapper) {
      fn = Ctor || _createCtor(fn);
    }
    return fn.apply(thisBinding, args);
  }
  return wrapper;
}

var _createHybrid = createHybrid;

/**
 * Creates a function that wraps `func` to enable currying.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @param {number} arity The arity of `func`.
 * @returns {Function} Returns the new wrapped function.
 */
function createCurry(func, bitmask, arity) {
  var Ctor = _createCtor(func);

  function wrapper() {
    var length = arguments.length,
        args = Array(length),
        index = length,
        placeholder = _getHolder(wrapper);

    while (index--) {
      args[index] = arguments[index];
    }
    var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
      ? []
      : _replaceHolders(args, placeholder);

    length -= holders.length;
    if (length < arity) {
      return _createRecurry(
        func, bitmask, _createHybrid, wrapper.placeholder, undefined,
        args, holders, undefined, undefined, arity - length);
    }
    var fn = (this && this !== _root && this instanceof wrapper) ? Ctor : func;
    return _apply(fn, this, args);
  }
  return wrapper;
}

var _createCurry = createCurry;

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG$2 = 1;

/**
 * Creates a function that wraps `func` to invoke it with the `this` binding
 * of `thisArg` and `partials` prepended to the arguments it receives.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @param {*} thisArg The `this` binding of `func`.
 * @param {Array} partials The arguments to prepend to those provided to
 *  the new function.
 * @returns {Function} Returns the new wrapped function.
 */
function createPartial(func, bitmask, thisArg, partials) {
  var isBind = bitmask & WRAP_BIND_FLAG$2,
      Ctor = _createCtor(func);

  function wrapper() {
    var argsIndex = -1,
        argsLength = arguments.length,
        leftIndex = -1,
        leftLength = partials.length,
        args = Array(leftLength + argsLength),
        fn = (this && this !== _root && this instanceof wrapper) ? Ctor : func;

    while (++leftIndex < leftLength) {
      args[leftIndex] = partials[leftIndex];
    }
    while (argsLength--) {
      args[leftIndex++] = arguments[++argsIndex];
    }
    return _apply(fn, isBind ? thisArg : this, args);
  }
  return wrapper;
}

var _createPartial = createPartial;

/** Used as the internal argument placeholder. */
var PLACEHOLDER = '__lodash_placeholder__';

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG$1 = 1,
    WRAP_BIND_KEY_FLAG$1 = 2,
    WRAP_CURRY_BOUND_FLAG = 4,
    WRAP_CURRY_FLAG$1 = 8,
    WRAP_ARY_FLAG$1 = 128,
    WRAP_REARG_FLAG$1 = 256;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMin = Math.min;

/**
 * Merges the function metadata of `source` into `data`.
 *
 * Merging metadata reduces the number of wrappers used to invoke a function.
 * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
 * may be applied regardless of execution order. Methods like `_.ary` and
 * `_.rearg` modify function arguments, making the order in which they are
 * executed important, preventing the merging of metadata. However, we make
 * an exception for a safe combined case where curried functions have `_.ary`
 * and or `_.rearg` applied.
 *
 * @private
 * @param {Array} data The destination metadata.
 * @param {Array} source The source metadata.
 * @returns {Array} Returns `data`.
 */
function mergeData(data, source) {
  var bitmask = data[1],
      srcBitmask = source[1],
      newBitmask = bitmask | srcBitmask,
      isCommon = newBitmask < (WRAP_BIND_FLAG$1 | WRAP_BIND_KEY_FLAG$1 | WRAP_ARY_FLAG$1);

  var isCombo =
    ((srcBitmask == WRAP_ARY_FLAG$1) && (bitmask == WRAP_CURRY_FLAG$1)) ||
    ((srcBitmask == WRAP_ARY_FLAG$1) && (bitmask == WRAP_REARG_FLAG$1) && (data[7].length <= source[8])) ||
    ((srcBitmask == (WRAP_ARY_FLAG$1 | WRAP_REARG_FLAG$1)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG$1));

  // Exit early if metadata can't be merged.
  if (!(isCommon || isCombo)) {
    return data;
  }
  // Use source `thisArg` if available.
  if (srcBitmask & WRAP_BIND_FLAG$1) {
    data[2] = source[2];
    // Set when currying a bound function.
    newBitmask |= bitmask & WRAP_BIND_FLAG$1 ? 0 : WRAP_CURRY_BOUND_FLAG;
  }
  // Compose partial arguments.
  var value = source[3];
  if (value) {
    var partials = data[3];
    data[3] = partials ? _composeArgs(partials, value, source[4]) : value;
    data[4] = partials ? _replaceHolders(data[3], PLACEHOLDER) : source[4];
  }
  // Compose partial right arguments.
  value = source[5];
  if (value) {
    partials = data[5];
    data[5] = partials ? _composeArgsRight(partials, value, source[6]) : value;
    data[6] = partials ? _replaceHolders(data[5], PLACEHOLDER) : source[6];
  }
  // Use source `argPos` if available.
  value = source[7];
  if (value) {
    data[7] = value;
  }
  // Use source `ary` if it's smaller.
  if (srcBitmask & WRAP_ARY_FLAG$1) {
    data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
  }
  // Use source `arity` if one is not provided.
  if (data[9] == null) {
    data[9] = source[9];
  }
  // Use source `func` and merge bitmasks.
  data[0] = source[0];
  data[1] = newBitmask;

  return data;
}

var _mergeData = mergeData;

/** Used to match a single whitespace character. */
var reWhitespace = /\s/;

/**
 * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
 * character of `string`.
 *
 * @private
 * @param {string} string The string to inspect.
 * @returns {number} Returns the index of the last non-whitespace character.
 */
function trimmedEndIndex(string) {
  var index = string.length;

  while (index-- && reWhitespace.test(string.charAt(index))) {}
  return index;
}

var _trimmedEndIndex = trimmedEndIndex;

/** Used to match leading whitespace. */
var reTrimStart = /^\s+/;

/**
 * The base implementation of `_.trim`.
 *
 * @private
 * @param {string} string The string to trim.
 * @returns {string} Returns the trimmed string.
 */
function baseTrim(string) {
  return string
    ? string.slice(0, _trimmedEndIndex(string) + 1).replace(reTrimStart, '')
    : string;
}

var _baseTrim = baseTrim;

/** `Object#toString` result references. */
var symbolTag$3 = '[object Symbol]';

/**
 * Checks if `value` is classified as a `Symbol` primitive or object.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
 * @example
 *
 * _.isSymbol(Symbol.iterator);
 * // => true
 *
 * _.isSymbol('abc');
 * // => false
 */
function isSymbol(value) {
  return typeof value == 'symbol' ||
    (isObjectLike_1(value) && _baseGetTag(value) == symbolTag$3);
}

var isSymbol_1 = isSymbol;

/** Used as references for various `Number` constants. */
var NAN = 0 / 0;

/** Used to detect bad signed hexadecimal string values. */
var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

/** Used to detect binary string values. */
var reIsBinary = /^0b[01]+$/i;

/** Used to detect octal string values. */
var reIsOctal = /^0o[0-7]+$/i;

/** Built-in method references without a dependency on `root`. */
var freeParseInt = parseInt;

/**
 * Converts `value` to a number.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to process.
 * @returns {number} Returns the number.
 * @example
 *
 * _.toNumber(3.2);
 * // => 3.2
 *
 * _.toNumber(Number.MIN_VALUE);
 * // => 5e-324
 *
 * _.toNumber(Infinity);
 * // => Infinity
 *
 * _.toNumber('3.2');
 * // => 3.2
 */
function toNumber(value) {
  if (typeof value == 'number') {
    return value;
  }
  if (isSymbol_1(value)) {
    return NAN;
  }
  if (isObject_1(value)) {
    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
    value = isObject_1(other) ? (other + '') : other;
  }
  if (typeof value != 'string') {
    return value === 0 ? value : +value;
  }
  value = _baseTrim(value);
  var isBinary = reIsBinary.test(value);
  return (isBinary || reIsOctal.test(value))
    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
    : (reIsBadHex.test(value) ? NAN : +value);
}

var toNumber_1 = toNumber;

/** Used as references for various `Number` constants. */
var INFINITY$2 = 1 / 0,
    MAX_INTEGER = 1.7976931348623157e+308;

/**
 * Converts `value` to a finite number.
 *
 * @static
 * @memberOf _
 * @since 4.12.0
 * @category Lang
 * @param {*} value The value to convert.
 * @returns {number} Returns the converted number.
 * @example
 *
 * _.toFinite(3.2);
 * // => 3.2
 *
 * _.toFinite(Number.MIN_VALUE);
 * // => 5e-324
 *
 * _.toFinite(Infinity);
 * // => 1.7976931348623157e+308
 *
 * _.toFinite('3.2');
 * // => 3.2
 */
function toFinite(value) {
  if (!value) {
    return value === 0 ? value : 0;
  }
  value = toNumber_1(value);
  if (value === INFINITY$2 || value === -INFINITY$2) {
    var sign = (value < 0 ? -1 : 1);
    return sign * MAX_INTEGER;
  }
  return value === value ? value : 0;
}

var toFinite_1 = toFinite;

/**
 * Converts `value` to an integer.
 *
 * **Note:** This method is loosely based on
 * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to convert.
 * @returns {number} Returns the converted integer.
 * @example
 *
 * _.toInteger(3.2);
 * // => 3
 *
 * _.toInteger(Number.MIN_VALUE);
 * // => 0
 *
 * _.toInteger(Infinity);
 * // => 1.7976931348623157e+308
 *
 * _.toInteger('3.2');
 * // => 3
 */
function toInteger(value) {
  var result = toFinite_1(value),
      remainder = result % 1;

  return result === result ? (remainder ? result - remainder : result) : 0;
}

var toInteger_1 = toInteger;

/** Error message constants. */
var FUNC_ERROR_TEXT$1 = 'Expected a function';

/** Used to compose bitmasks for function metadata. */
var WRAP_BIND_FLAG = 1,
    WRAP_BIND_KEY_FLAG = 2,
    WRAP_CURRY_FLAG = 8,
    WRAP_CURRY_RIGHT_FLAG = 16,
    WRAP_PARTIAL_FLAG = 32,
    WRAP_PARTIAL_RIGHT_FLAG = 64;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax$1 = Math.max;

/**
 * Creates a function that either curries or invokes `func` with optional
 * `this` binding and partially applied arguments.
 *
 * @private
 * @param {Function|string} func The function or method name to wrap.
 * @param {number} bitmask The bitmask flags.
 *    1 - `_.bind`
 *    2 - `_.bindKey`
 *    4 - `_.curry` or `_.curryRight` of a bound function
 *    8 - `_.curry`
 *   16 - `_.curryRight`
 *   32 - `_.partial`
 *   64 - `_.partialRight`
 *  128 - `_.rearg`
 *  256 - `_.ary`
 *  512 - `_.flip`
 * @param {*} [thisArg] The `this` binding of `func`.
 * @param {Array} [partials] The arguments to be partially applied.
 * @param {Array} [holders] The `partials` placeholder indexes.
 * @param {Array} [argPos] The argument positions of the new function.
 * @param {number} [ary] The arity cap of `func`.
 * @param {number} [arity] The arity of `func`.
 * @returns {Function} Returns the new wrapped function.
 */
function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
  var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
  if (!isBindKey && typeof func != 'function') {
    throw new TypeError(FUNC_ERROR_TEXT$1);
  }
  var length = partials ? partials.length : 0;
  if (!length) {
    bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
    partials = holders = undefined;
  }
  ary = ary === undefined ? ary : nativeMax$1(toInteger_1(ary), 0);
  arity = arity === undefined ? arity : toInteger_1(arity);
  length -= holders ? holders.length : 0;

  if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
    var partialsRight = partials,
        holdersRight = holders;

    partials = holders = undefined;
  }
  var data = isBindKey ? undefined : _getData(func);

  var newData = [
    func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
    argPos, ary, arity
  ];

  if (data) {
    _mergeData(newData, data);
  }
  func = newData[0];
  bitmask = newData[1];
  thisArg = newData[2];
  partials = newData[3];
  holders = newData[4];
  arity = newData[9] = newData[9] === undefined
    ? (isBindKey ? 0 : func.length)
    : nativeMax$1(newData[9] - length, 0);

  if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
    bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
  }
  if (!bitmask || bitmask == WRAP_BIND_FLAG) {
    var result = _createBind(func, bitmask, thisArg);
  } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
    result = _createCurry(func, bitmask, arity);
  } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
    result = _createPartial(func, bitmask, thisArg, partials);
  } else {
    result = _createHybrid.apply(undefined, newData);
  }
  var setter = data ? _baseSetData : _setData;
  return _setWrapToString(setter(result, newData), func, bitmask);
}

var _createWrap = createWrap;

commonjsRegister("/$$rollup_base$$/node_modules/lodash/curry.js", function (module, exports) {
  var createWrap = _createWrap;

/** Used to compose bitmasks for function metadata. */
var WRAP_CURRY_FLAG = 8;

/**
 * Creates a function that accepts arguments of `func` and either invokes
 * `func` returning its result, if at least `arity` number of arguments have
 * been provided, or returns a function that accepts the remaining `func`
 * arguments, and so on. The arity of `func` may be specified if `func.length`
 * is not sufficient.
 *
 * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
 * may be used as a placeholder for provided arguments.
 *
 * **Note:** This method doesn't set the "length" property of curried functions.
 *
 * @static
 * @memberOf _
 * @since 2.0.0
 * @category Function
 * @param {Function} func The function to curry.
 * @param {number} [arity=func.length] The arity of `func`.
 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
 * @returns {Function} Returns the new curried function.
 * @example
 *
 * var abc = function(a, b, c) {
 *   return [a, b, c];
 * };
 *
 * var curried = _.curry(abc);
 *
 * curried(1)(2)(3);
 * // => [1, 2, 3]
 *
 * curried(1, 2)(3);
 * // => [1, 2, 3]
 *
 * curried(1, 2, 3);
 * // => [1, 2, 3]
 *
 * // Curried with placeholders.
 * curried(1)(_, 3)(2);
 * // => [1, 2, 3]
 */
function curry(func, arity, guard) {
  arity = guard ? undefined : arity;
  var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
  result.placeholder = curry.placeholder;
  return result;
}

// Assign default placeholders.
curry.placeholder = {};

module.exports = curry;

});

commonjsRegister("/$$rollup_base$$/node_modules/lodash/curryRight.js", function (module, exports) {
  var createWrap = _createWrap;

/** Used to compose bitmasks for function metadata. */
var WRAP_CURRY_RIGHT_FLAG = 16;

/**
 * This method is like `_.curry` except that arguments are applied to `func`
 * in the manner of `_.partialRight` instead of `_.partial`.
 *
 * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
 * builds, may be used as a placeholder for provided arguments.
 *
 * **Note:** This method doesn't set the "length" property of curried functions.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Function
 * @param {Function} func The function to curry.
 * @param {number} [arity=func.length] The arity of `func`.
 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
 * @returns {Function} Returns the new curried function.
 * @example
 *
 * var abc = function(a, b, c) {
 *   return [a, b, c];
 * };
 *
 * var curried = _.curryRight(abc);
 *
 * curried(3)(2)(1);
 * // => [1, 2, 3]
 *
 * curried(2, 3)(1);
 * // => [1, 2, 3]
 *
 * curried(1, 2, 3);
 * // => [1, 2, 3]
 *
 * // Curried with placeholders.
 * curried(3)(1, _)(2);
 * // => [1, 2, 3]
 */
function curryRight(func, arity, guard) {
  arity = guard ? undefined : arity;
  var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
  result.placeholder = curryRight.placeholder;
  return result;
}

// Assign default placeholders.
curryRight.placeholder = {};

module.exports = curryRight;

});

/** Used to map aliases to their real names. */

var _mapping = createCommonjsModule(function (module, exports) {
exports.aliasToReal = {

  // Lodash aliases.
  'each': 'forEach',
  'eachRight': 'forEachRight',
  'entries': 'toPairs',
  'entriesIn': 'toPairsIn',
  'extend': 'assignIn',
  'extendAll': 'assignInAll',
  'extendAllWith': 'assignInAllWith',
  'extendWith': 'assignInWith',
  'first': 'head',

  // Methods that are curried variants of others.
  'conforms': 'conformsTo',
  'matches': 'isMatch',
  'property': 'get',

  // Ramda aliases.
  '__': 'placeholder',
  'F': 'stubFalse',
  'T': 'stubTrue',
  'all': 'every',
  'allPass': 'overEvery',
  'always': 'constant',
  'any': 'some',
  'anyPass': 'overSome',
  'apply': 'spread',
  'assoc': 'set',
  'assocPath': 'set',
  'complement': 'negate',
  'compose': 'flowRight',
  'contains': 'includes',
  'dissoc': 'unset',
  'dissocPath': 'unset',
  'dropLast': 'dropRight',
  'dropLastWhile': 'dropRightWhile',
  'equals': 'isEqual',
  'identical': 'eq',
  'indexBy': 'keyBy',
  'init': 'initial',
  'invertObj': 'invert',
  'juxt': 'over',
  'omitAll': 'omit',
  'nAry': 'ary',
  'path': 'get',
  'pathEq': 'matchesProperty',
  'pathOr': 'getOr',
  'paths': 'at',
  'pickAll': 'pick',
  'pipe': 'flow',
  'pluck': 'map',
  'prop': 'get',
  'propEq': 'matchesProperty',
  'propOr': 'getOr',
  'props': 'at',
  'symmetricDifference': 'xor',
  'symmetricDifferenceBy': 'xorBy',
  'symmetricDifferenceWith': 'xorWith',
  'takeLast': 'takeRight',
  'takeLastWhile': 'takeRightWhile',
  'unapply': 'rest',
  'unnest': 'flatten',
  'useWith': 'overArgs',
  'where': 'conformsTo',
  'whereEq': 'isMatch',
  'zipObj': 'zipObject'
};

/** Used to map ary to method names. */
exports.aryMethod = {
  '1': [
    'assignAll', 'assignInAll', 'attempt', 'castArray', 'ceil', 'create',
    'curry', 'curryRight', 'defaultsAll', 'defaultsDeepAll', 'floor', 'flow',
    'flowRight', 'fromPairs', 'invert', 'iteratee', 'memoize', 'method', 'mergeAll',
    'methodOf', 'mixin', 'nthArg', 'over', 'overEvery', 'overSome','rest', 'reverse',
    'round', 'runInContext', 'spread', 'template', 'trim', 'trimEnd', 'trimStart',
    'uniqueId', 'words', 'zipAll'
  ],
  '2': [
    'add', 'after', 'ary', 'assign', 'assignAllWith', 'assignIn', 'assignInAllWith',
    'at', 'before', 'bind', 'bindAll', 'bindKey', 'chunk', 'cloneDeepWith',
    'cloneWith', 'concat', 'conformsTo', 'countBy', 'curryN', 'curryRightN',
    'debounce', 'defaults', 'defaultsDeep', 'defaultTo', 'delay', 'difference',
    'divide', 'drop', 'dropRight', 'dropRightWhile', 'dropWhile', 'endsWith', 'eq',
    'every', 'filter', 'find', 'findIndex', 'findKey', 'findLast', 'findLastIndex',
    'findLastKey', 'flatMap', 'flatMapDeep', 'flattenDepth', 'forEach',
    'forEachRight', 'forIn', 'forInRight', 'forOwn', 'forOwnRight', 'get',
    'groupBy', 'gt', 'gte', 'has', 'hasIn', 'includes', 'indexOf', 'intersection',
    'invertBy', 'invoke', 'invokeMap', 'isEqual', 'isMatch', 'join', 'keyBy',
    'lastIndexOf', 'lt', 'lte', 'map', 'mapKeys', 'mapValues', 'matchesProperty',
    'maxBy', 'meanBy', 'merge', 'mergeAllWith', 'minBy', 'multiply', 'nth', 'omit',
    'omitBy', 'overArgs', 'pad', 'padEnd', 'padStart', 'parseInt', 'partial',
    'partialRight', 'partition', 'pick', 'pickBy', 'propertyOf', 'pull', 'pullAll',
    'pullAt', 'random', 'range', 'rangeRight', 'rearg', 'reject', 'remove',
    'repeat', 'restFrom', 'result', 'sampleSize', 'some', 'sortBy', 'sortedIndex',
    'sortedIndexOf', 'sortedLastIndex', 'sortedLastIndexOf', 'sortedUniqBy',
    'split', 'spreadFrom', 'startsWith', 'subtract', 'sumBy', 'take', 'takeRight',
    'takeRightWhile', 'takeWhile', 'tap', 'throttle', 'thru', 'times', 'trimChars',
    'trimCharsEnd', 'trimCharsStart', 'truncate', 'union', 'uniqBy', 'uniqWith',
    'unset', 'unzipWith', 'without', 'wrap', 'xor', 'zip', 'zipObject',
    'zipObjectDeep'
  ],
  '3': [
    'assignInWith', 'assignWith', 'clamp', 'differenceBy', 'differenceWith',
    'findFrom', 'findIndexFrom', 'findLastFrom', 'findLastIndexFrom', 'getOr',
    'includesFrom', 'indexOfFrom', 'inRange', 'intersectionBy', 'intersectionWith',
    'invokeArgs', 'invokeArgsMap', 'isEqualWith', 'isMatchWith', 'flatMapDepth',
    'lastIndexOfFrom', 'mergeWith', 'orderBy', 'padChars', 'padCharsEnd',
    'padCharsStart', 'pullAllBy', 'pullAllWith', 'rangeStep', 'rangeStepRight',
    'reduce', 'reduceRight', 'replace', 'set', 'slice', 'sortedIndexBy',
    'sortedLastIndexBy', 'transform', 'unionBy', 'unionWith', 'update', 'xorBy',
    'xorWith', 'zipWith'
  ],
  '4': [
    'fill', 'setWith', 'updateWith'
  ]
};

/** Used to map ary to rearg configs. */
exports.aryRearg = {
  '2': [1, 0],
  '3': [2, 0, 1],
  '4': [3, 2, 0, 1]
};

/** Used to map method names to their iteratee ary. */
exports.iterateeAry = {
  'dropRightWhile': 1,
  'dropWhile': 1,
  'every': 1,
  'filter': 1,
  'find': 1,
  'findFrom': 1,
  'findIndex': 1,
  'findIndexFrom': 1,
  'findKey': 1,
  'findLast': 1,
  'findLastFrom': 1,
  'findLastIndex': 1,
  'findLastIndexFrom': 1,
  'findLastKey': 1,
  'flatMap': 1,
  'flatMapDeep': 1,
  'flatMapDepth': 1,
  'forEach': 1,
  'forEachRight': 1,
  'forIn': 1,
  'forInRight': 1,
  'forOwn': 1,
  'forOwnRight': 1,
  'map': 1,
  'mapKeys': 1,
  'mapValues': 1,
  'partition': 1,
  'reduce': 2,
  'reduceRight': 2,
  'reject': 1,
  'remove': 1,
  'some': 1,
  'takeRightWhile': 1,
  'takeWhile': 1,
  'times': 1,
  'transform': 2
};

/** Used to map method names to iteratee rearg configs. */
exports.iterateeRearg = {
  'mapKeys': [1],
  'reduceRight': [1, 0]
};

/** Used to map method names to rearg configs. */
exports.methodRearg = {
  'assignInAllWith': [1, 0],
  'assignInWith': [1, 2, 0],
  'assignAllWith': [1, 0],
  'assignWith': [1, 2, 0],
  'differenceBy': [1, 2, 0],
  'differenceWith': [1, 2, 0],
  'getOr': [2, 1, 0],
  'intersectionBy': [1, 2, 0],
  'intersectionWith': [1, 2, 0],
  'isEqualWith': [1, 2, 0],
  'isMatchWith': [2, 1, 0],
  'mergeAllWith': [1, 0],
  'mergeWith': [1, 2, 0],
  'padChars': [2, 1, 0],
  'padCharsEnd': [2, 1, 0],
  'padCharsStart': [2, 1, 0],
  'pullAllBy': [2, 1, 0],
  'pullAllWith': [2, 1, 0],
  'rangeStep': [1, 2, 0],
  'rangeStepRight': [1, 2, 0],
  'setWith': [3, 1, 2, 0],
  'sortedIndexBy': [2, 1, 0],
  'sortedLastIndexBy': [2, 1, 0],
  'unionBy': [1, 2, 0],
  'unionWith': [1, 2, 0],
  'updateWith': [3, 1, 2, 0],
  'xorBy': [1, 2, 0],
  'xorWith': [1, 2, 0],
  'zipWith': [1, 2, 0]
};

/** Used to map method names to spread configs. */
exports.methodSpread = {
  'assignAll': { 'start': 0 },
  'assignAllWith': { 'start': 0 },
  'assignInAll': { 'start': 0 },
  'assignInAllWith': { 'start': 0 },
  'defaultsAll': { 'start': 0 },
  'defaultsDeepAll': { 'start': 0 },
  'invokeArgs': { 'start': 2 },
  'invokeArgsMap': { 'start': 2 },
  'mergeAll': { 'start': 0 },
  'mergeAllWith': { 'start': 0 },
  'partial': { 'start': 1 },
  'partialRight': { 'start': 1 },
  'without': { 'start': 1 },
  'zipAll': { 'start': 0 }
};

/** Used to identify methods which mutate arrays or objects. */
exports.mutate = {
  'array': {
    'fill': true,
    'pull': true,
    'pullAll': true,
    'pullAllBy': true,
    'pullAllWith': true,
    'pullAt': true,
    'remove': true,
    'reverse': true
  },
  'object': {
    'assign': true,
    'assignAll': true,
    'assignAllWith': true,
    'assignIn': true,
    'assignInAll': true,
    'assignInAllWith': true,
    'assignInWith': true,
    'assignWith': true,
    'defaults': true,
    'defaultsAll': true,
    'defaultsDeep': true,
    'defaultsDeepAll': true,
    'merge': true,
    'mergeAll': true,
    'mergeAllWith': true,
    'mergeWith': true,
  },
  'set': {
    'set': true,
    'setWith': true,
    'unset': true,
    'update': true,
    'updateWith': true
  }
};

/** Used to map real names to their aliases. */
exports.realToAlias = (function() {
  var hasOwnProperty = Object.prototype.hasOwnProperty,
      object = exports.aliasToReal,
      result = {};

  for (var key in object) {
    var value = object[key];
    if (hasOwnProperty.call(result, value)) {
      result[value].push(key);
    } else {
      result[value] = [key];
    }
  }
  return result;
}());

/** Used to map method names to other names. */
exports.remap = {
  'assignAll': 'assign',
  'assignAllWith': 'assignWith',
  'assignInAll': 'assignIn',
  'assignInAllWith': 'assignInWith',
  'curryN': 'curry',
  'curryRightN': 'curryRight',
  'defaultsAll': 'defaults',
  'defaultsDeepAll': 'defaultsDeep',
  'findFrom': 'find',
  'findIndexFrom': 'findIndex',
  'findLastFrom': 'findLast',
  'findLastIndexFrom': 'findLastIndex',
  'getOr': 'get',
  'includesFrom': 'includes',
  'indexOfFrom': 'indexOf',
  'invokeArgs': 'invoke',
  'invokeArgsMap': 'invokeMap',
  'lastIndexOfFrom': 'lastIndexOf',
  'mergeAll': 'merge',
  'mergeAllWith': 'mergeWith',
  'padChars': 'pad',
  'padCharsEnd': 'padEnd',
  'padCharsStart': 'padStart',
  'propertyOf': 'get',
  'rangeStep': 'range',
  'rangeStepRight': 'rangeRight',
  'restFrom': 'rest',
  'spreadFrom': 'spread',
  'trimChars': 'trim',
  'trimCharsEnd': 'trimEnd',
  'trimCharsStart': 'trimStart',
  'zipAll': 'zip'
};

/** Used to track methods that skip fixing their arity. */
exports.skipFixed = {
  'castArray': true,
  'flow': true,
  'flowRight': true,
  'iteratee': true,
  'mixin': true,
  'rearg': true,
  'runInContext': true
};

/** Used to track methods that skip rearranging arguments. */
exports.skipRearg = {
  'add': true,
  'assign': true,
  'assignIn': true,
  'bind': true,
  'bindKey': true,
  'concat': true,
  'difference': true,
  'divide': true,
  'eq': true,
  'gt': true,
  'gte': true,
  'isEqual': true,
  'lt': true,
  'lte': true,
  'matchesProperty': true,
  'merge': true,
  'multiply': true,
  'overArgs': true,
  'partial': true,
  'partialRight': true,
  'propertyOf': true,
  'random': true,
  'range': true,
  'rangeRight': true,
  'subtract': true,
  'zip': true,
  'zipObject': true,
  'zipObjectDeep': true
};
}, "/$$rollup_base$$/node_modules/lodash/fp");

/**
 * The default argument placeholder value for methods.
 *
 * @type {Object}
 */
var placeholder = {};

/** Built-in value reference. */
var push = Array.prototype.push;

/**
 * Creates a function, with an arity of `n`, that invokes `func` with the
 * arguments it receives.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {number} n The arity of the new function.
 * @returns {Function} Returns the new function.
 */
function baseArity(func, n) {
  return n == 2
    ? function(a, b) { return func.apply(undefined, arguments); }
    : function(a) { return func.apply(undefined, arguments); };
}

/**
 * Creates a function that invokes `func`, with up to `n` arguments, ignoring
 * any additional arguments.
 *
 * @private
 * @param {Function} func The function to cap arguments for.
 * @param {number} n The arity cap.
 * @returns {Function} Returns the new function.
 */
function baseAry(func, n) {
  return n == 2
    ? function(a, b) { return func(a, b); }
    : function(a) { return func(a); };
}

/**
 * Creates a clone of `array`.
 *
 * @private
 * @param {Array} array The array to clone.
 * @returns {Array} Returns the cloned array.
 */
function cloneArray(array) {
  var length = array ? array.length : 0,
      result = Array(length);

  while (length--) {
    result[length] = array[length];
  }
  return result;
}

/**
 * Creates a function that clones a given object using the assignment `func`.
 *
 * @private
 * @param {Function} func The assignment function.
 * @returns {Function} Returns the new cloner function.
 */
function createCloner(func) {
  return function(object) {
    return func({}, object);
  };
}

/**
 * A specialized version of `_.spread` which flattens the spread array into
 * the arguments of the invoked `func`.
 *
 * @private
 * @param {Function} func The function to spread arguments over.
 * @param {number} start The start position of the spread.
 * @returns {Function} Returns the new function.
 */
function flatSpread(func, start) {
  return function() {
    var length = arguments.length,
        lastIndex = length - 1,
        args = Array(length);

    while (length--) {
      args[length] = arguments[length];
    }
    var array = args[start],
        otherArgs = args.slice(0, start);

    if (array) {
      push.apply(otherArgs, array);
    }
    if (start != lastIndex) {
      push.apply(otherArgs, args.slice(start + 1));
    }
    return func.apply(this, otherArgs);
  };
}

/**
 * Creates a function that wraps `func` and uses `cloner` to clone the first
 * argument it receives.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {Function} cloner The function to clone arguments.
 * @returns {Function} Returns the new immutable function.
 */
function wrapImmutable(func, cloner) {
  return function() {
    var length = arguments.length;
    if (!length) {
      return;
    }
    var args = Array(length);
    while (length--) {
      args[length] = arguments[length];
    }
    var result = args[0] = cloner.apply(undefined, args);
    func.apply(undefined, args);
    return result;
  };
}

/**
 * The base implementation of `convert` which accepts a `util` object of methods
 * required to perform conversions.
 *
 * @param {Object} util The util object.
 * @param {string} name The name of the function to convert.
 * @param {Function} func The function to convert.
 * @param {Object} [options] The options object.
 * @param {boolean} [options.cap=true] Specify capping iteratee arguments.
 * @param {boolean} [options.curry=true] Specify currying.
 * @param {boolean} [options.fixed=true] Specify fixed arity.
 * @param {boolean} [options.immutable=true] Specify immutable operations.
 * @param {boolean} [options.rearg=true] Specify rearranging arguments.
 * @returns {Function|Object} Returns the converted function or object.
 */
function baseConvert(util, name, func, options) {
  var isLib = typeof name == 'function',
      isObj = name === Object(name);

  if (isObj) {
    options = func;
    func = name;
    name = undefined;
  }
  if (func == null) {
    throw new TypeError;
  }
  options || (options = {});

  var config = {
    'cap': 'cap' in options ? options.cap : true,
    'curry': 'curry' in options ? options.curry : true,
    'fixed': 'fixed' in options ? options.fixed : true,
    'immutable': 'immutable' in options ? options.immutable : true,
    'rearg': 'rearg' in options ? options.rearg : true
  };

  var defaultHolder = isLib ? func : placeholder,
      forceCurry = ('curry' in options) && options.curry,
      forceFixed = ('fixed' in options) && options.fixed,
      forceRearg = ('rearg' in options) && options.rearg,
      pristine = isLib ? func.runInContext() : undefined;

  var helpers = isLib ? func : {
    'ary': util.ary,
    'assign': util.assign,
    'clone': util.clone,
    'curry': util.curry,
    'forEach': util.forEach,
    'isArray': util.isArray,
    'isError': util.isError,
    'isFunction': util.isFunction,
    'isWeakMap': util.isWeakMap,
    'iteratee': util.iteratee,
    'keys': util.keys,
    'rearg': util.rearg,
    'toInteger': util.toInteger,
    'toPath': util.toPath
  };

  var ary = helpers.ary,
      assign = helpers.assign,
      clone = helpers.clone,
      curry = helpers.curry,
      each = helpers.forEach,
      isArray = helpers.isArray,
      isError = helpers.isError,
      isFunction = helpers.isFunction,
      isWeakMap = helpers.isWeakMap,
      keys = helpers.keys,
      rearg = helpers.rearg,
      toInteger = helpers.toInteger,
      toPath = helpers.toPath;

  var aryMethodKeys = keys(_mapping.aryMethod);

  var wrappers = {
    'castArray': function(castArray) {
      return function() {
        var value = arguments[0];
        return isArray(value)
          ? castArray(cloneArray(value))
          : castArray.apply(undefined, arguments);
      };
    },
    'iteratee': function(iteratee) {
      return function() {
        var func = arguments[0],
            arity = arguments[1],
            result = iteratee(func, arity),
            length = result.length;

        if (config.cap && typeof arity == 'number') {
          arity = arity > 2 ? (arity - 2) : 1;
          return (length && length <= arity) ? result : baseAry(result, arity);
        }
        return result;
      };
    },
    'mixin': function(mixin) {
      return function(source) {
        var func = this;
        if (!isFunction(func)) {
          return mixin(func, Object(source));
        }
        var pairs = [];
        each(keys(source), function(key) {
          if (isFunction(source[key])) {
            pairs.push([key, func.prototype[key]]);
          }
        });

        mixin(func, Object(source));

        each(pairs, function(pair) {
          var value = pair[1];
          if (isFunction(value)) {
            func.prototype[pair[0]] = value;
          } else {
            delete func.prototype[pair[0]];
          }
        });
        return func;
      };
    },
    'nthArg': function(nthArg) {
      return function(n) {
        var arity = n < 0 ? 1 : (toInteger(n) + 1);
        return curry(nthArg(n), arity);
      };
    },
    'rearg': function(rearg) {
      return function(func, indexes) {
        var arity = indexes ? indexes.length : 0;
        return curry(rearg(func, indexes), arity);
      };
    },
    'runInContext': function(runInContext) {
      return function(context) {
        return baseConvert(util, runInContext(context), options);
      };
    }
  };

  /*--------------------------------------------------------------------------*/

  /**
   * Casts `func` to a function with an arity capped iteratee if needed.
   *
   * @private
   * @param {string} name The name of the function to inspect.
   * @param {Function} func The function to inspect.
   * @returns {Function} Returns the cast function.
   */
  function castCap(name, func) {
    if (config.cap) {
      var indexes = _mapping.iterateeRearg[name];
      if (indexes) {
        return iterateeRearg(func, indexes);
      }
      var n = !isLib && _mapping.iterateeAry[name];
      if (n) {
        return iterateeAry(func, n);
      }
    }
    return func;
  }

  /**
   * Casts `func` to a curried function if needed.
   *
   * @private
   * @param {string} name The name of the function to inspect.
   * @param {Function} func The function to inspect.
   * @param {number} n The arity of `func`.
   * @returns {Function} Returns the cast function.
   */
  function castCurry(name, func, n) {
    return (forceCurry || (config.curry && n > 1))
      ? curry(func, n)
      : func;
  }

  /**
   * Casts `func` to a fixed arity function if needed.
   *
   * @private
   * @param {string} name The name of the function to inspect.
   * @param {Function} func The function to inspect.
   * @param {number} n The arity cap.
   * @returns {Function} Returns the cast function.
   */
  function castFixed(name, func, n) {
    if (config.fixed && (forceFixed || !_mapping.skipFixed[name])) {
      var data = _mapping.methodSpread[name],
          start = data && data.start;

      return start  === undefined ? ary(func, n) : flatSpread(func, start);
    }
    return func;
  }

  /**
   * Casts `func` to an rearged function if needed.
   *
   * @private
   * @param {string} name The name of the function to inspect.
   * @param {Function} func The function to inspect.
   * @param {number} n The arity of `func`.
   * @returns {Function} Returns the cast function.
   */
  function castRearg(name, func, n) {
    return (config.rearg && n > 1 && (forceRearg || !_mapping.skipRearg[name]))
      ? rearg(func, _mapping.methodRearg[name] || _mapping.aryRearg[n])
      : func;
  }

  /**
   * Creates a clone of `object` by `path`.
   *
   * @private
   * @param {Object} object The object to clone.
   * @param {Array|string} path The path to clone by.
   * @returns {Object} Returns the cloned object.
   */
  function cloneByPath(object, path) {
    path = toPath(path);

    var index = -1,
        length = path.length,
        lastIndex = length - 1,
        result = clone(Object(object)),
        nested = result;

    while (nested != null && ++index < length) {
      var key = path[index],
          value = nested[key];

      if (value != null &&
          !(isFunction(value) || isError(value) || isWeakMap(value))) {
        nested[key] = clone(index == lastIndex ? value : Object(value));
      }
      nested = nested[key];
    }
    return result;
  }

  /**
   * Converts `lodash` to an immutable auto-curried iteratee-first data-last
   * version with conversion `options` applied.
   *
   * @param {Object} [options] The options object. See `baseConvert` for more details.
   * @returns {Function} Returns the converted `lodash`.
   */
  function convertLib(options) {
    return _.runInContext.convert(options)(undefined);
  }

  /**
   * Create a converter function for `func` of `name`.
   *
   * @param {string} name The name of the function to convert.
   * @param {Function} func The function to convert.
   * @returns {Function} Returns the new converter function.
   */
  function createConverter(name, func) {
    var realName = _mapping.aliasToReal[name] || name,
        methodName = _mapping.remap[realName] || realName,
        oldOptions = options;

    return function(options) {
      var newUtil = isLib ? pristine : helpers,
          newFunc = isLib ? pristine[methodName] : func,
          newOptions = assign(assign({}, oldOptions), options);

      return baseConvert(newUtil, realName, newFunc, newOptions);
    };
  }

  /**
   * Creates a function that wraps `func` to invoke its iteratee, with up to `n`
   * arguments, ignoring any additional arguments.
   *
   * @private
   * @param {Function} func The function to cap iteratee arguments for.
   * @param {number} n The arity cap.
   * @returns {Function} Returns the new function.
   */
  function iterateeAry(func, n) {
    return overArg(func, function(func) {
      return typeof func == 'function' ? baseAry(func, n) : func;
    });
  }

  /**
   * Creates a function that wraps `func` to invoke its iteratee with arguments
   * arranged according to the specified `indexes` where the argument value at
   * the first index is provided as the first argument, the argument value at
   * the second index is provided as the second argument, and so on.
   *
   * @private
   * @param {Function} func The function to rearrange iteratee arguments for.
   * @param {number[]} indexes The arranged argument indexes.
   * @returns {Function} Returns the new function.
   */
  function iterateeRearg(func, indexes) {
    return overArg(func, function(func) {
      var n = indexes.length;
      return baseArity(rearg(baseAry(func, n), indexes), n);
    });
  }

  /**
   * Creates a function that invokes `func` with its first argument transformed.
   *
   * @private
   * @param {Function} func The function to wrap.
   * @param {Function} transform The argument transform.
   * @returns {Function} Returns the new function.
   */
  function overArg(func, transform) {
    return function() {
      var length = arguments.length;
      if (!length) {
        return func();
      }
      var args = Array(length);
      while (length--) {
        args[length] = arguments[length];
      }
      var index = config.rearg ? 0 : (length - 1);
      args[index] = transform(args[index]);
      return func.apply(undefined, args);
    };
  }

  /**
   * Creates a function that wraps `func` and applys the conversions
   * rules by `name`.
   *
   * @private
   * @param {string} name The name of the function to wrap.
   * @param {Function} func The function to wrap.
   * @returns {Function} Returns the converted function.
   */
  function wrap(name, func, placeholder) {
    var result,
        realName = _mapping.aliasToReal[name] || name,
        wrapped = func,
        wrapper = wrappers[realName];

    if (wrapper) {
      wrapped = wrapper(func);
    }
    else if (config.immutable) {
      if (_mapping.mutate.array[realName]) {
        wrapped = wrapImmutable(func, cloneArray);
      }
      else if (_mapping.mutate.object[realName]) {
        wrapped = wrapImmutable(func, createCloner(func));
      }
      else if (_mapping.mutate.set[realName]) {
        wrapped = wrapImmutable(func, cloneByPath);
      }
    }
    each(aryMethodKeys, function(aryKey) {
      each(_mapping.aryMethod[aryKey], function(otherName) {
        if (realName == otherName) {
          var data = _mapping.methodSpread[realName],
              afterRearg = data && data.afterRearg;

          result = afterRearg
            ? castFixed(realName, castRearg(realName, wrapped, aryKey), aryKey)
            : castRearg(realName, castFixed(realName, wrapped, aryKey), aryKey);

          result = castCap(realName, result);
          result = castCurry(realName, result, aryKey);
          return false;
        }
      });
      return !result;
    });

    result || (result = wrapped);
    if (result == func) {
      result = forceCurry ? curry(result, 1) : function() {
        return func.apply(this, arguments);
      };
    }
    result.convert = createConverter(realName, func);
    result.placeholder = func.placeholder = placeholder;

    return result;
  }

  /*--------------------------------------------------------------------------*/

  if (!isObj) {
    return wrap(name, func, defaultHolder);
  }
  var _ = func;

  // Convert methods by ary cap.
  var pairs = [];
  each(aryMethodKeys, function(aryKey) {
    each(_mapping.aryMethod[aryKey], function(key) {
      var func = _[_mapping.remap[key] || key];
      if (func) {
        pairs.push([key, wrap(key, func, _)]);
      }
    });
  });

  // Convert remaining methods.
  each(keys(_), function(key) {
    var func = _[key];
    if (typeof func == 'function') {
      var length = pairs.length;
      while (length--) {
        if (pairs[length][0] == key) {
          return;
        }
      }
      func.convert = createConverter(key, func);
      pairs.push([key, func]);
    }
  });

  // Assign to `_` leaving `_.prototype` unchanged to allow chaining.
  each(pairs, function(pair) {
    _[pair[0]] = pair[1];
  });

  _.convert = convertLib;
  _.placeholder = _;

  // Assign aliases.
  each(keys(_), function(key) {
    each(_mapping.realToAlias[key] || [], function(alias) {
      _[alias] = _[key];
    });
  });

  return _;
}

var _baseConvert = baseConvert;

/** Used to compose bitmasks for function metadata. */
var WRAP_ARY_FLAG = 128;

/**
 * Creates a function that invokes `func`, with up to `n` arguments,
 * ignoring any additional arguments.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Function
 * @param {Function} func The function to cap arguments for.
 * @param {number} [n=func.length] The arity cap.
 * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
 * @returns {Function} Returns the new capped function.
 * @example
 *
 * _.map(['6', '8', '10'], _.ary(parseInt, 1));
 * // => [6, 8, 10]
 */
function ary(func, n, guard) {
  n = guard ? undefined : n;
  n = (func && n == null) ? func.length : n;
  return _createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
}

var ary_1 = ary;

/**
 * The base implementation of `assignValue` and `assignMergeValue` without
 * value checks.
 *
 * @private
 * @param {Object} object The object to modify.
 * @param {string} key The key of the property to assign.
 * @param {*} value The value to assign.
 */
function baseAssignValue(object, key, value) {
  if (key == '__proto__' && _defineProperty) {
    _defineProperty(object, key, {
      'configurable': true,
      'enumerable': true,
      'value': value,
      'writable': true
    });
  } else {
    object[key] = value;
  }
}

var _baseAssignValue = baseAssignValue;

/**
 * Performs a
 * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
 * comparison between two values to determine if they are equivalent.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 * @example
 *
 * var object = { 'a': 1 };
 * var other = { 'a': 1 };
 *
 * _.eq(object, object);
 * // => true
 *
 * _.eq(object, other);
 * // => false
 *
 * _.eq('a', 'a');
 * // => true
 *
 * _.eq('a', Object('a'));
 * // => false
 *
 * _.eq(NaN, NaN);
 * // => true
 */
function eq(value, other) {
  return value === other || (value !== value && other !== other);
}

var eq_1 = eq;

/** Used for built-in method references. */
var objectProto$c = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$a = objectProto$c.hasOwnProperty;

/**
 * Assigns `value` to `key` of `object` if the existing value is not equivalent
 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
 * for equality comparisons.
 *
 * @private
 * @param {Object} object The object to modify.
 * @param {string} key The key of the property to assign.
 * @param {*} value The value to assign.
 */
function assignValue(object, key, value) {
  var objValue = object[key];
  if (!(hasOwnProperty$a.call(object, key) && eq_1(objValue, value)) ||
      (value === undefined && !(key in object))) {
    _baseAssignValue(object, key, value);
  }
}

var _assignValue = assignValue;

/**
 * Copies properties of `source` to `object`.
 *
 * @private
 * @param {Object} source The object to copy properties from.
 * @param {Array} props The property identifiers to copy.
 * @param {Object} [object={}] The object to copy properties to.
 * @param {Function} [customizer] The function to customize copied values.
 * @returns {Object} Returns `object`.
 */
function copyObject(source, props, object, customizer) {
  var isNew = !object;
  object || (object = {});

  var index = -1,
      length = props.length;

  while (++index < length) {
    var key = props[index];

    var newValue = customizer
      ? customizer(object[key], source[key], key, object, source)
      : undefined;

    if (newValue === undefined) {
      newValue = source[key];
    }
    if (isNew) {
      _baseAssignValue(object, key, newValue);
    } else {
      _assignValue(object, key, newValue);
    }
  }
  return object;
}

var _copyObject = copyObject;

/**
 * The base implementation of `_.times` without support for iteratee shorthands
 * or max array length checks.
 *
 * @private
 * @param {number} n The number of times to invoke `iteratee`.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the array of results.
 */
function baseTimes(n, iteratee) {
  var index = -1,
      result = Array(n);

  while (++index < n) {
    result[index] = iteratee(index);
  }
  return result;
}

var _baseTimes = baseTimes;

/** `Object#toString` result references. */
var argsTag$3 = '[object Arguments]';

/**
 * The base implementation of `_.isArguments`.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 */
function baseIsArguments(value) {
  return isObjectLike_1(value) && _baseGetTag(value) == argsTag$3;
}

var _baseIsArguments = baseIsArguments;

/** Used for built-in method references. */
var objectProto$b = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$9 = objectProto$b.hasOwnProperty;

/** Built-in value references. */
var propertyIsEnumerable$1 = objectProto$b.propertyIsEnumerable;

/**
 * Checks if `value` is likely an `arguments` object.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an `arguments` object,
 *  else `false`.
 * @example
 *
 * _.isArguments(function() { return arguments; }());
 * // => true
 *
 * _.isArguments([1, 2, 3]);
 * // => false
 */
var isArguments = _baseIsArguments(function() { return arguments; }()) ? _baseIsArguments : function(value) {
  return isObjectLike_1(value) && hasOwnProperty$9.call(value, 'callee') &&
    !propertyIsEnumerable$1.call(value, 'callee');
};

var isArguments_1 = isArguments;

/**
 * This method returns `false`.
 *
 * @static
 * @memberOf _
 * @since 4.13.0
 * @category Util
 * @returns {boolean} Returns `false`.
 * @example
 *
 * _.times(2, _.stubFalse);
 * // => [false, false]
 */
function stubFalse() {
  return false;
}

var stubFalse_1 = stubFalse;

var isBuffer_1 = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Built-in value references. */
var Buffer = moduleExports ? _root.Buffer : undefined;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;

/**
 * Checks if `value` is a buffer.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
 * @example
 *
 * _.isBuffer(new Buffer(2));
 * // => true
 *
 * _.isBuffer(new Uint8Array(2));
 * // => false
 */
var isBuffer = nativeIsBuffer || stubFalse_1;

module.exports = isBuffer;
}, "/$$rollup_base$$/node_modules/lodash");

/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;

/**
 * Checks if `value` is a valid array-like length.
 *
 * **Note:** This method is loosely based on
 * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
 * @example
 *
 * _.isLength(3);
 * // => true
 *
 * _.isLength(Number.MIN_VALUE);
 * // => false
 *
 * _.isLength(Infinity);
 * // => false
 *
 * _.isLength('3');
 * // => false
 */
function isLength(value) {
  return typeof value == 'number' &&
    value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
}

var isLength_1 = isLength;

/** `Object#toString` result references. */
var argsTag$2 = '[object Arguments]',
    arrayTag$2 = '[object Array]',
    boolTag$3 = '[object Boolean]',
    dateTag$3 = '[object Date]',
    errorTag$3 = '[object Error]',
    funcTag$1 = '[object Function]',
    mapTag$5 = '[object Map]',
    numberTag$3 = '[object Number]',
    objectTag$4 = '[object Object]',
    regexpTag$3 = '[object RegExp]',
    setTag$5 = '[object Set]',
    stringTag$3 = '[object String]',
    weakMapTag$3 = '[object WeakMap]';

var arrayBufferTag$3 = '[object ArrayBuffer]',
    dataViewTag$4 = '[object DataView]',
    float32Tag$2 = '[object Float32Array]',
    float64Tag$2 = '[object Float64Array]',
    int8Tag$2 = '[object Int8Array]',
    int16Tag$2 = '[object Int16Array]',
    int32Tag$2 = '[object Int32Array]',
    uint8Tag$2 = '[object Uint8Array]',
    uint8ClampedTag$2 = '[object Uint8ClampedArray]',
    uint16Tag$2 = '[object Uint16Array]',
    uint32Tag$2 = '[object Uint32Array]';

/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag$2] = typedArrayTags[float64Tag$2] =
typedArrayTags[int8Tag$2] = typedArrayTags[int16Tag$2] =
typedArrayTags[int32Tag$2] = typedArrayTags[uint8Tag$2] =
typedArrayTags[uint8ClampedTag$2] = typedArrayTags[uint16Tag$2] =
typedArrayTags[uint32Tag$2] = true;
typedArrayTags[argsTag$2] = typedArrayTags[arrayTag$2] =
typedArrayTags[arrayBufferTag$3] = typedArrayTags[boolTag$3] =
typedArrayTags[dataViewTag$4] = typedArrayTags[dateTag$3] =
typedArrayTags[errorTag$3] = typedArrayTags[funcTag$1] =
typedArrayTags[mapTag$5] = typedArrayTags[numberTag$3] =
typedArrayTags[objectTag$4] = typedArrayTags[regexpTag$3] =
typedArrayTags[setTag$5] = typedArrayTags[stringTag$3] =
typedArrayTags[weakMapTag$3] = false;

/**
 * The base implementation of `_.isTypedArray` without Node.js optimizations.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 */
function baseIsTypedArray(value) {
  return isObjectLike_1(value) &&
    isLength_1(value.length) && !!typedArrayTags[_baseGetTag(value)];
}

var _baseIsTypedArray = baseIsTypedArray;

/**
 * The base implementation of `_.unary` without support for storing metadata.
 *
 * @private
 * @param {Function} func The function to cap arguments for.
 * @returns {Function} Returns the new capped function.
 */
function baseUnary(func) {
  return function(value) {
    return func(value);
  };
}

var _baseUnary = baseUnary;

var _nodeUtil = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports && _freeGlobal.process;

/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
  try {
    // Use `util.types` for Node.js 10+.
    var types = freeModule && freeModule.require && freeModule.require('util').types;

    if (types) {
      return types;
    }

    // Legacy `process.binding('util')` for Node.js < 10.
    return freeProcess && freeProcess.binding && freeProcess.binding('util');
  } catch (e) {}
}());

module.exports = nodeUtil;
}, "/$$rollup_base$$/node_modules/lodash");

/* Node.js helper references. */
var nodeIsTypedArray = _nodeUtil && _nodeUtil.isTypedArray;

/**
 * Checks if `value` is classified as a typed array.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
 * @example
 *
 * _.isTypedArray(new Uint8Array);
 * // => true
 *
 * _.isTypedArray([]);
 * // => false
 */
var isTypedArray = nodeIsTypedArray ? _baseUnary(nodeIsTypedArray) : _baseIsTypedArray;

var isTypedArray_1 = isTypedArray;

/** Used for built-in method references. */
var objectProto$a = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$8 = objectProto$a.hasOwnProperty;

/**
 * Creates an array of the enumerable property names of the array-like `value`.
 *
 * @private
 * @param {*} value The value to query.
 * @param {boolean} inherited Specify returning inherited property names.
 * @returns {Array} Returns the array of property names.
 */
function arrayLikeKeys(value, inherited) {
  var isArr = isArray_1(value),
      isArg = !isArr && isArguments_1(value),
      isBuff = !isArr && !isArg && isBuffer_1(value),
      isType = !isArr && !isArg && !isBuff && isTypedArray_1(value),
      skipIndexes = isArr || isArg || isBuff || isType,
      result = skipIndexes ? _baseTimes(value.length, String) : [],
      length = result.length;

  for (var key in value) {
    if ((inherited || hasOwnProperty$8.call(value, key)) &&
        !(skipIndexes && (
           // Safari 9 has enumerable `arguments.length` in strict mode.
           key == 'length' ||
           // Node.js 0.10 has enumerable non-index properties on buffers.
           (isBuff && (key == 'offset' || key == 'parent')) ||
           // PhantomJS 2 has enumerable non-index properties on typed arrays.
           (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
           // Skip index properties.
           _isIndex(key, length)
        ))) {
      result.push(key);
    }
  }
  return result;
}

var _arrayLikeKeys = arrayLikeKeys;

/** Used for built-in method references. */
var objectProto$9 = Object.prototype;

/**
 * Checks if `value` is likely a prototype object.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
 */
function isPrototype(value) {
  var Ctor = value && value.constructor,
      proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$9;

  return value === proto;
}

var _isPrototype = isPrototype;

/**
 * Creates a unary function that invokes `func` with its argument transformed.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {Function} transform The argument transform.
 * @returns {Function} Returns the new function.
 */
function overArg(func, transform) {
  return function(arg) {
    return func(transform(arg));
  };
}

var _overArg = overArg;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeKeys = _overArg(Object.keys, Object);

var _nativeKeys = nativeKeys;

/** Used for built-in method references. */
var objectProto$8 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$7 = objectProto$8.hasOwnProperty;

/**
 * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeys(object) {
  if (!_isPrototype(object)) {
    return _nativeKeys(object);
  }
  var result = [];
  for (var key in Object(object)) {
    if (hasOwnProperty$7.call(object, key) && key != 'constructor') {
      result.push(key);
    }
  }
  return result;
}

var _baseKeys = baseKeys;

/**
 * Checks if `value` is array-like. A value is considered array-like if it's
 * not a function and has a `value.length` that's an integer greater than or
 * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
 * @example
 *
 * _.isArrayLike([1, 2, 3]);
 * // => true
 *
 * _.isArrayLike(document.body.children);
 * // => true
 *
 * _.isArrayLike('abc');
 * // => true
 *
 * _.isArrayLike(_.noop);
 * // => false
 */
function isArrayLike(value) {
  return value != null && isLength_1(value.length) && !isFunction_1(value);
}

var isArrayLike_1 = isArrayLike;

/**
 * Creates an array of the own enumerable property names of `object`.
 *
 * **Note:** Non-object values are coerced to objects. See the
 * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
 * for more details.
 *
 * @static
 * @since 0.1.0
 * @memberOf _
 * @category Object
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.keys(new Foo);
 * // => ['a', 'b'] (iteration order is not guaranteed)
 *
 * _.keys('hi');
 * // => ['0', '1']
 */
function keys(object) {
  return isArrayLike_1(object) ? _arrayLikeKeys(object) : _baseKeys(object);
}

var keys_1 = keys;

/**
 * The base implementation of `_.assign` without support for multiple sources
 * or `customizer` functions.
 *
 * @private
 * @param {Object} object The destination object.
 * @param {Object} source The source object.
 * @returns {Object} Returns `object`.
 */
function baseAssign(object, source) {
  return object && _copyObject(source, keys_1(source), object);
}

var _baseAssign = baseAssign;

/**
 * Removes all key-value entries from the list cache.
 *
 * @private
 * @name clear
 * @memberOf ListCache
 */
function listCacheClear() {
  this.__data__ = [];
  this.size = 0;
}

var _listCacheClear = listCacheClear;

/**
 * Gets the index at which the `key` is found in `array` of key-value pairs.
 *
 * @private
 * @param {Array} array The array to inspect.
 * @param {*} key The key to search for.
 * @returns {number} Returns the index of the matched value, else `-1`.
 */
function assocIndexOf(array, key) {
  var length = array.length;
  while (length--) {
    if (eq_1(array[length][0], key)) {
      return length;
    }
  }
  return -1;
}

var _assocIndexOf = assocIndexOf;

/** Used for built-in method references. */
var arrayProto = Array.prototype;

/** Built-in value references. */
var splice = arrayProto.splice;

/**
 * Removes `key` and its value from the list cache.
 *
 * @private
 * @name delete
 * @memberOf ListCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function listCacheDelete(key) {
  var data = this.__data__,
      index = _assocIndexOf(data, key);

  if (index < 0) {
    return false;
  }
  var lastIndex = data.length - 1;
  if (index == lastIndex) {
    data.pop();
  } else {
    splice.call(data, index, 1);
  }
  --this.size;
  return true;
}

var _listCacheDelete = listCacheDelete;

/**
 * Gets the list cache value for `key`.
 *
 * @private
 * @name get
 * @memberOf ListCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function listCacheGet(key) {
  var data = this.__data__,
      index = _assocIndexOf(data, key);

  return index < 0 ? undefined : data[index][1];
}

var _listCacheGet = listCacheGet;

/**
 * Checks if a list cache value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf ListCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function listCacheHas(key) {
  return _assocIndexOf(this.__data__, key) > -1;
}

var _listCacheHas = listCacheHas;

/**
 * Sets the list cache `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf ListCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the list cache instance.
 */
function listCacheSet(key, value) {
  var data = this.__data__,
      index = _assocIndexOf(data, key);

  if (index < 0) {
    ++this.size;
    data.push([key, value]);
  } else {
    data[index][1] = value;
  }
  return this;
}

var _listCacheSet = listCacheSet;

/**
 * Creates an list cache object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function ListCache(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

// Add methods to `ListCache`.
ListCache.prototype.clear = _listCacheClear;
ListCache.prototype['delete'] = _listCacheDelete;
ListCache.prototype.get = _listCacheGet;
ListCache.prototype.has = _listCacheHas;
ListCache.prototype.set = _listCacheSet;

var _ListCache = ListCache;

/**
 * Removes all key-value entries from the stack.
 *
 * @private
 * @name clear
 * @memberOf Stack
 */
function stackClear() {
  this.__data__ = new _ListCache;
  this.size = 0;
}

var _stackClear = stackClear;

/**
 * Removes `key` and its value from the stack.
 *
 * @private
 * @name delete
 * @memberOf Stack
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function stackDelete(key) {
  var data = this.__data__,
      result = data['delete'](key);

  this.size = data.size;
  return result;
}

var _stackDelete = stackDelete;

/**
 * Gets the stack value for `key`.
 *
 * @private
 * @name get
 * @memberOf Stack
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function stackGet(key) {
  return this.__data__.get(key);
}

var _stackGet = stackGet;

/**
 * Checks if a stack value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Stack
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function stackHas(key) {
  return this.__data__.has(key);
}

var _stackHas = stackHas;

/* Built-in method references that are verified to be native. */
var Map$1 = _getNative(_root, 'Map');

var _Map = Map$1;

/* Built-in method references that are verified to be native. */
var nativeCreate = _getNative(Object, 'create');

var _nativeCreate = nativeCreate;

/**
 * Removes all key-value entries from the hash.
 *
 * @private
 * @name clear
 * @memberOf Hash
 */
function hashClear() {
  this.__data__ = _nativeCreate ? _nativeCreate(null) : {};
  this.size = 0;
}

var _hashClear = hashClear;

/**
 * Removes `key` and its value from the hash.
 *
 * @private
 * @name delete
 * @memberOf Hash
 * @param {Object} hash The hash to modify.
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function hashDelete(key) {
  var result = this.has(key) && delete this.__data__[key];
  this.size -= result ? 1 : 0;
  return result;
}

var _hashDelete = hashDelete;

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED$2 = '__lodash_hash_undefined__';

/** Used for built-in method references. */
var objectProto$7 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$6 = objectProto$7.hasOwnProperty;

/**
 * Gets the hash value for `key`.
 *
 * @private
 * @name get
 * @memberOf Hash
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function hashGet(key) {
  var data = this.__data__;
  if (_nativeCreate) {
    var result = data[key];
    return result === HASH_UNDEFINED$2 ? undefined : result;
  }
  return hasOwnProperty$6.call(data, key) ? data[key] : undefined;
}

var _hashGet = hashGet;

/** Used for built-in method references. */
var objectProto$6 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$5 = objectProto$6.hasOwnProperty;

/**
 * Checks if a hash value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf Hash
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function hashHas(key) {
  var data = this.__data__;
  return _nativeCreate ? (data[key] !== undefined) : hasOwnProperty$5.call(data, key);
}

var _hashHas = hashHas;

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED$1 = '__lodash_hash_undefined__';

/**
 * Sets the hash `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Hash
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the hash instance.
 */
function hashSet(key, value) {
  var data = this.__data__;
  this.size += this.has(key) ? 0 : 1;
  data[key] = (_nativeCreate && value === undefined) ? HASH_UNDEFINED$1 : value;
  return this;
}

var _hashSet = hashSet;

/**
 * Creates a hash object.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Hash(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

// Add methods to `Hash`.
Hash.prototype.clear = _hashClear;
Hash.prototype['delete'] = _hashDelete;
Hash.prototype.get = _hashGet;
Hash.prototype.has = _hashHas;
Hash.prototype.set = _hashSet;

var _Hash = Hash;

/**
 * Removes all key-value entries from the map.
 *
 * @private
 * @name clear
 * @memberOf MapCache
 */
function mapCacheClear() {
  this.size = 0;
  this.__data__ = {
    'hash': new _Hash,
    'map': new (_Map || _ListCache),
    'string': new _Hash
  };
}

var _mapCacheClear = mapCacheClear;

/**
 * Checks if `value` is suitable for use as unique object key.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
 */
function isKeyable(value) {
  var type = typeof value;
  return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
    ? (value !== '__proto__')
    : (value === null);
}

var _isKeyable = isKeyable;

/**
 * Gets the data for `map`.
 *
 * @private
 * @param {Object} map The map to query.
 * @param {string} key The reference key.
 * @returns {*} Returns the map data.
 */
function getMapData(map, key) {
  var data = map.__data__;
  return _isKeyable(key)
    ? data[typeof key == 'string' ? 'string' : 'hash']
    : data.map;
}

var _getMapData = getMapData;

/**
 * Removes `key` and its value from the map.
 *
 * @private
 * @name delete
 * @memberOf MapCache
 * @param {string} key The key of the value to remove.
 * @returns {boolean} Returns `true` if the entry was removed, else `false`.
 */
function mapCacheDelete(key) {
  var result = _getMapData(this, key)['delete'](key);
  this.size -= result ? 1 : 0;
  return result;
}

var _mapCacheDelete = mapCacheDelete;

/**
 * Gets the map value for `key`.
 *
 * @private
 * @name get
 * @memberOf MapCache
 * @param {string} key The key of the value to get.
 * @returns {*} Returns the entry value.
 */
function mapCacheGet(key) {
  return _getMapData(this, key).get(key);
}

var _mapCacheGet = mapCacheGet;

/**
 * Checks if a map value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf MapCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function mapCacheHas(key) {
  return _getMapData(this, key).has(key);
}

var _mapCacheHas = mapCacheHas;

/**
 * Sets the map `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf MapCache
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the map cache instance.
 */
function mapCacheSet(key, value) {
  var data = _getMapData(this, key),
      size = data.size;

  data.set(key, value);
  this.size += data.size == size ? 0 : 1;
  return this;
}

var _mapCacheSet = mapCacheSet;

/**
 * Creates a map cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function MapCache(entries) {
  var index = -1,
      length = entries == null ? 0 : entries.length;

  this.clear();
  while (++index < length) {
    var entry = entries[index];
    this.set(entry[0], entry[1]);
  }
}

// Add methods to `MapCache`.
MapCache.prototype.clear = _mapCacheClear;
MapCache.prototype['delete'] = _mapCacheDelete;
MapCache.prototype.get = _mapCacheGet;
MapCache.prototype.has = _mapCacheHas;
MapCache.prototype.set = _mapCacheSet;

var _MapCache = MapCache;

/** Used as the size to enable large array optimizations. */
var LARGE_ARRAY_SIZE = 200;

/**
 * Sets the stack `key` to `value`.
 *
 * @private
 * @name set
 * @memberOf Stack
 * @param {string} key The key of the value to set.
 * @param {*} value The value to set.
 * @returns {Object} Returns the stack cache instance.
 */
function stackSet(key, value) {
  var data = this.__data__;
  if (data instanceof _ListCache) {
    var pairs = data.__data__;
    if (!_Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
      pairs.push([key, value]);
      this.size = ++data.size;
      return this;
    }
    data = this.__data__ = new _MapCache(pairs);
  }
  data.set(key, value);
  this.size = data.size;
  return this;
}

var _stackSet = stackSet;

/**
 * Creates a stack cache object to store key-value pairs.
 *
 * @private
 * @constructor
 * @param {Array} [entries] The key-value pairs to cache.
 */
function Stack(entries) {
  var data = this.__data__ = new _ListCache(entries);
  this.size = data.size;
}

// Add methods to `Stack`.
Stack.prototype.clear = _stackClear;
Stack.prototype['delete'] = _stackDelete;
Stack.prototype.get = _stackGet;
Stack.prototype.has = _stackHas;
Stack.prototype.set = _stackSet;

var _Stack = Stack;

/**
 * This function is like
 * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
 * except that it includes inherited enumerable properties.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function nativeKeysIn(object) {
  var result = [];
  if (object != null) {
    for (var key in Object(object)) {
      result.push(key);
    }
  }
  return result;
}

var _nativeKeysIn = nativeKeysIn;

/** Used for built-in method references. */
var objectProto$5 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$4 = objectProto$5.hasOwnProperty;

/**
 * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 */
function baseKeysIn(object) {
  if (!isObject_1(object)) {
    return _nativeKeysIn(object);
  }
  var isProto = _isPrototype(object),
      result = [];

  for (var key in object) {
    if (!(key == 'constructor' && (isProto || !hasOwnProperty$4.call(object, key)))) {
      result.push(key);
    }
  }
  return result;
}

var _baseKeysIn = baseKeysIn;

/**
 * Creates an array of the own and inherited enumerable property names of `object`.
 *
 * **Note:** Non-object values are coerced to objects.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Object
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 *   this.b = 2;
 * }
 *
 * Foo.prototype.c = 3;
 *
 * _.keysIn(new Foo);
 * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
 */
function keysIn(object) {
  return isArrayLike_1(object) ? _arrayLikeKeys(object, true) : _baseKeysIn(object);
}

var keysIn_1 = keysIn;

/**
 * The base implementation of `_.assignIn` without support for multiple sources
 * or `customizer` functions.
 *
 * @private
 * @param {Object} object The destination object.
 * @param {Object} source The source object.
 * @returns {Object} Returns `object`.
 */
function baseAssignIn(object, source) {
  return object && _copyObject(source, keysIn_1(source), object);
}

var _baseAssignIn = baseAssignIn;

var _cloneBuffer = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = exports && !exports.nodeType && exports;

/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;

/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;

/** Built-in value references. */
var Buffer = moduleExports ? _root.Buffer : undefined,
    allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined;

/**
 * Creates a clone of  `buffer`.
 *
 * @private
 * @param {Buffer} buffer The buffer to clone.
 * @param {boolean} [isDeep] Specify a deep clone.
 * @returns {Buffer} Returns the cloned buffer.
 */
function cloneBuffer(buffer, isDeep) {
  if (isDeep) {
    return buffer.slice();
  }
  var length = buffer.length,
      result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);

  buffer.copy(result);
  return result;
}

module.exports = cloneBuffer;
}, "/$$rollup_base$$/node_modules/lodash");

/**
 * A specialized version of `_.filter` for arrays without support for
 * iteratee shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} predicate The function invoked per iteration.
 * @returns {Array} Returns the new filtered array.
 */
function arrayFilter(array, predicate) {
  var index = -1,
      length = array == null ? 0 : array.length,
      resIndex = 0,
      result = [];

  while (++index < length) {
    var value = array[index];
    if (predicate(value, index, array)) {
      result[resIndex++] = value;
    }
  }
  return result;
}

var _arrayFilter = arrayFilter;

/**
 * This method returns a new empty array.
 *
 * @static
 * @memberOf _
 * @since 4.13.0
 * @category Util
 * @returns {Array} Returns the new empty array.
 * @example
 *
 * var arrays = _.times(2, _.stubArray);
 *
 * console.log(arrays);
 * // => [[], []]
 *
 * console.log(arrays[0] === arrays[1]);
 * // => false
 */
function stubArray() {
  return [];
}

var stubArray_1 = stubArray;

/** Used for built-in method references. */
var objectProto$4 = Object.prototype;

/** Built-in value references. */
var propertyIsEnumerable = objectProto$4.propertyIsEnumerable;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeGetSymbols$1 = Object.getOwnPropertySymbols;

/**
 * Creates an array of the own enumerable symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of symbols.
 */
var getSymbols = !nativeGetSymbols$1 ? stubArray_1 : function(object) {
  if (object == null) {
    return [];
  }
  object = Object(object);
  return _arrayFilter(nativeGetSymbols$1(object), function(symbol) {
    return propertyIsEnumerable.call(object, symbol);
  });
};

var _getSymbols = getSymbols;

/**
 * Copies own symbols of `source` to `object`.
 *
 * @private
 * @param {Object} source The object to copy symbols from.
 * @param {Object} [object={}] The object to copy symbols to.
 * @returns {Object} Returns `object`.
 */
function copySymbols(source, object) {
  return _copyObject(source, _getSymbols(source), object);
}

var _copySymbols = copySymbols;

/**
 * Appends the elements of `values` to `array`.
 *
 * @private
 * @param {Array} array The array to modify.
 * @param {Array} values The values to append.
 * @returns {Array} Returns `array`.
 */
function arrayPush(array, values) {
  var index = -1,
      length = values.length,
      offset = array.length;

  while (++index < length) {
    array[offset + index] = values[index];
  }
  return array;
}

var _arrayPush = arrayPush;

/** Built-in value references. */
var getPrototype = _overArg(Object.getPrototypeOf, Object);

var _getPrototype = getPrototype;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeGetSymbols = Object.getOwnPropertySymbols;

/**
 * Creates an array of the own and inherited enumerable symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of symbols.
 */
var getSymbolsIn = !nativeGetSymbols ? stubArray_1 : function(object) {
  var result = [];
  while (object) {
    _arrayPush(result, _getSymbols(object));
    object = _getPrototype(object);
  }
  return result;
};

var _getSymbolsIn = getSymbolsIn;

/**
 * Copies own and inherited symbols of `source` to `object`.
 *
 * @private
 * @param {Object} source The object to copy symbols from.
 * @param {Object} [object={}] The object to copy symbols to.
 * @returns {Object} Returns `object`.
 */
function copySymbolsIn(source, object) {
  return _copyObject(source, _getSymbolsIn(source), object);
}

var _copySymbolsIn = copySymbolsIn;

/**
 * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
 * `keysFunc` and `symbolsFunc` to get the enumerable property names and
 * symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {Function} keysFunc The function to get the keys of `object`.
 * @param {Function} symbolsFunc The function to get the symbols of `object`.
 * @returns {Array} Returns the array of property names and symbols.
 */
function baseGetAllKeys(object, keysFunc, symbolsFunc) {
  var result = keysFunc(object);
  return isArray_1(object) ? result : _arrayPush(result, symbolsFunc(object));
}

var _baseGetAllKeys = baseGetAllKeys;

/**
 * Creates an array of own enumerable property names and symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names and symbols.
 */
function getAllKeys(object) {
  return _baseGetAllKeys(object, keys_1, _getSymbols);
}

var _getAllKeys = getAllKeys;

/**
 * Creates an array of own and inherited enumerable property names and
 * symbols of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the array of property names and symbols.
 */
function getAllKeysIn(object) {
  return _baseGetAllKeys(object, keysIn_1, _getSymbolsIn);
}

var _getAllKeysIn = getAllKeysIn;

/* Built-in method references that are verified to be native. */
var DataView = _getNative(_root, 'DataView');

var _DataView = DataView;

/* Built-in method references that are verified to be native. */
var Promise$1 = _getNative(_root, 'Promise');

var _Promise = Promise$1;

/* Built-in method references that are verified to be native. */
var Set$1 = _getNative(_root, 'Set');

var _Set = Set$1;

/** `Object#toString` result references. */
var mapTag$4 = '[object Map]',
    objectTag$3 = '[object Object]',
    promiseTag = '[object Promise]',
    setTag$4 = '[object Set]',
    weakMapTag$2 = '[object WeakMap]';

var dataViewTag$3 = '[object DataView]';

/** Used to detect maps, sets, and weakmaps. */
var dataViewCtorString = _toSource(_DataView),
    mapCtorString = _toSource(_Map),
    promiseCtorString = _toSource(_Promise),
    setCtorString = _toSource(_Set),
    weakMapCtorString = _toSource(_WeakMap);

/**
 * Gets the `toStringTag` of `value`.
 *
 * @private
 * @param {*} value The value to query.
 * @returns {string} Returns the `toStringTag`.
 */
var getTag = _baseGetTag;

// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
if ((_DataView && getTag(new _DataView(new ArrayBuffer(1))) != dataViewTag$3) ||
    (_Map && getTag(new _Map) != mapTag$4) ||
    (_Promise && getTag(_Promise.resolve()) != promiseTag) ||
    (_Set && getTag(new _Set) != setTag$4) ||
    (_WeakMap && getTag(new _WeakMap) != weakMapTag$2)) {
  getTag = function(value) {
    var result = _baseGetTag(value),
        Ctor = result == objectTag$3 ? value.constructor : undefined,
        ctorString = Ctor ? _toSource(Ctor) : '';

    if (ctorString) {
      switch (ctorString) {
        case dataViewCtorString: return dataViewTag$3;
        case mapCtorString: return mapTag$4;
        case promiseCtorString: return promiseTag;
        case setCtorString: return setTag$4;
        case weakMapCtorString: return weakMapTag$2;
      }
    }
    return result;
  };
}

var _getTag = getTag;

/** Used for built-in method references. */
var objectProto$3 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$3 = objectProto$3.hasOwnProperty;

/**
 * Initializes an array clone.
 *
 * @private
 * @param {Array} array The array to clone.
 * @returns {Array} Returns the initialized clone.
 */
function initCloneArray(array) {
  var length = array.length,
      result = new array.constructor(length);

  // Add properties assigned by `RegExp#exec`.
  if (length && typeof array[0] == 'string' && hasOwnProperty$3.call(array, 'index')) {
    result.index = array.index;
    result.input = array.input;
  }
  return result;
}

var _initCloneArray = initCloneArray;

/** Built-in value references. */
var Uint8Array$1 = _root.Uint8Array;

var _Uint8Array = Uint8Array$1;

/**
 * Creates a clone of `arrayBuffer`.
 *
 * @private
 * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
 * @returns {ArrayBuffer} Returns the cloned array buffer.
 */
function cloneArrayBuffer(arrayBuffer) {
  var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
  new _Uint8Array(result).set(new _Uint8Array(arrayBuffer));
  return result;
}

var _cloneArrayBuffer = cloneArrayBuffer;

/**
 * Creates a clone of `dataView`.
 *
 * @private
 * @param {Object} dataView The data view to clone.
 * @param {boolean} [isDeep] Specify a deep clone.
 * @returns {Object} Returns the cloned data view.
 */
function cloneDataView(dataView, isDeep) {
  var buffer = isDeep ? _cloneArrayBuffer(dataView.buffer) : dataView.buffer;
  return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
}

var _cloneDataView = cloneDataView;

/** Used to match `RegExp` flags from their coerced string values. */
var reFlags = /\w*$/;

/**
 * Creates a clone of `regexp`.
 *
 * @private
 * @param {Object} regexp The regexp to clone.
 * @returns {Object} Returns the cloned regexp.
 */
function cloneRegExp(regexp) {
  var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
  result.lastIndex = regexp.lastIndex;
  return result;
}

var _cloneRegExp = cloneRegExp;

/** Used to convert symbols to primitives and strings. */
var symbolProto$2 = _Symbol ? _Symbol.prototype : undefined,
    symbolValueOf$1 = symbolProto$2 ? symbolProto$2.valueOf : undefined;

/**
 * Creates a clone of the `symbol` object.
 *
 * @private
 * @param {Object} symbol The symbol object to clone.
 * @returns {Object} Returns the cloned symbol object.
 */
function cloneSymbol(symbol) {
  return symbolValueOf$1 ? Object(symbolValueOf$1.call(symbol)) : {};
}

var _cloneSymbol = cloneSymbol;

/**
 * Creates a clone of `typedArray`.
 *
 * @private
 * @param {Object} typedArray The typed array to clone.
 * @param {boolean} [isDeep] Specify a deep clone.
 * @returns {Object} Returns the cloned typed array.
 */
function cloneTypedArray(typedArray, isDeep) {
  var buffer = isDeep ? _cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
  return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
}

var _cloneTypedArray = cloneTypedArray;

/** `Object#toString` result references. */
var boolTag$2 = '[object Boolean]',
    dateTag$2 = '[object Date]',
    mapTag$3 = '[object Map]',
    numberTag$2 = '[object Number]',
    regexpTag$2 = '[object RegExp]',
    setTag$3 = '[object Set]',
    stringTag$2 = '[object String]',
    symbolTag$2 = '[object Symbol]';

var arrayBufferTag$2 = '[object ArrayBuffer]',
    dataViewTag$2 = '[object DataView]',
    float32Tag$1 = '[object Float32Array]',
    float64Tag$1 = '[object Float64Array]',
    int8Tag$1 = '[object Int8Array]',
    int16Tag$1 = '[object Int16Array]',
    int32Tag$1 = '[object Int32Array]',
    uint8Tag$1 = '[object Uint8Array]',
    uint8ClampedTag$1 = '[object Uint8ClampedArray]',
    uint16Tag$1 = '[object Uint16Array]',
    uint32Tag$1 = '[object Uint32Array]';

/**
 * Initializes an object clone based on its `toStringTag`.
 *
 * **Note:** This function only supports cloning values with tags of
 * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
 *
 * @private
 * @param {Object} object The object to clone.
 * @param {string} tag The `toStringTag` of the object to clone.
 * @param {boolean} [isDeep] Specify a deep clone.
 * @returns {Object} Returns the initialized clone.
 */
function initCloneByTag(object, tag, isDeep) {
  var Ctor = object.constructor;
  switch (tag) {
    case arrayBufferTag$2:
      return _cloneArrayBuffer(object);

    case boolTag$2:
    case dateTag$2:
      return new Ctor(+object);

    case dataViewTag$2:
      return _cloneDataView(object, isDeep);

    case float32Tag$1: case float64Tag$1:
    case int8Tag$1: case int16Tag$1: case int32Tag$1:
    case uint8Tag$1: case uint8ClampedTag$1: case uint16Tag$1: case uint32Tag$1:
      return _cloneTypedArray(object, isDeep);

    case mapTag$3:
      return new Ctor;

    case numberTag$2:
    case stringTag$2:
      return new Ctor(object);

    case regexpTag$2:
      return _cloneRegExp(object);

    case setTag$3:
      return new Ctor;

    case symbolTag$2:
      return _cloneSymbol(object);
  }
}

var _initCloneByTag = initCloneByTag;

/**
 * Initializes an object clone.
 *
 * @private
 * @param {Object} object The object to clone.
 * @returns {Object} Returns the initialized clone.
 */
function initCloneObject(object) {
  return (typeof object.constructor == 'function' && !_isPrototype(object))
    ? _baseCreate(_getPrototype(object))
    : {};
}

var _initCloneObject = initCloneObject;

/** `Object#toString` result references. */
var mapTag$2 = '[object Map]';

/**
 * The base implementation of `_.isMap` without Node.js optimizations.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a map, else `false`.
 */
function baseIsMap(value) {
  return isObjectLike_1(value) && _getTag(value) == mapTag$2;
}

var _baseIsMap = baseIsMap;

/* Node.js helper references. */
var nodeIsMap = _nodeUtil && _nodeUtil.isMap;

/**
 * Checks if `value` is classified as a `Map` object.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a map, else `false`.
 * @example
 *
 * _.isMap(new Map);
 * // => true
 *
 * _.isMap(new WeakMap);
 * // => false
 */
var isMap = nodeIsMap ? _baseUnary(nodeIsMap) : _baseIsMap;

var isMap_1 = isMap;

/** `Object#toString` result references. */
var setTag$2 = '[object Set]';

/**
 * The base implementation of `_.isSet` without Node.js optimizations.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a set, else `false`.
 */
function baseIsSet(value) {
  return isObjectLike_1(value) && _getTag(value) == setTag$2;
}

var _baseIsSet = baseIsSet;

/* Node.js helper references. */
var nodeIsSet = _nodeUtil && _nodeUtil.isSet;

/**
 * Checks if `value` is classified as a `Set` object.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a set, else `false`.
 * @example
 *
 * _.isSet(new Set);
 * // => true
 *
 * _.isSet(new WeakSet);
 * // => false
 */
var isSet = nodeIsSet ? _baseUnary(nodeIsSet) : _baseIsSet;

var isSet_1 = isSet;

/** Used to compose bitmasks for cloning. */
var CLONE_DEEP_FLAG$1 = 1,
    CLONE_FLAT_FLAG = 2,
    CLONE_SYMBOLS_FLAG$1 = 4;

/** `Object#toString` result references. */
var argsTag$1 = '[object Arguments]',
    arrayTag$1 = '[object Array]',
    boolTag$1 = '[object Boolean]',
    dateTag$1 = '[object Date]',
    errorTag$2 = '[object Error]',
    funcTag = '[object Function]',
    genTag = '[object GeneratorFunction]',
    mapTag$1 = '[object Map]',
    numberTag$1 = '[object Number]',
    objectTag$2 = '[object Object]',
    regexpTag$1 = '[object RegExp]',
    setTag$1 = '[object Set]',
    stringTag$1 = '[object String]',
    symbolTag$1 = '[object Symbol]',
    weakMapTag$1 = '[object WeakMap]';

var arrayBufferTag$1 = '[object ArrayBuffer]',
    dataViewTag$1 = '[object DataView]',
    float32Tag = '[object Float32Array]',
    float64Tag = '[object Float64Array]',
    int8Tag = '[object Int8Array]',
    int16Tag = '[object Int16Array]',
    int32Tag = '[object Int32Array]',
    uint8Tag = '[object Uint8Array]',
    uint8ClampedTag = '[object Uint8ClampedArray]',
    uint16Tag = '[object Uint16Array]',
    uint32Tag = '[object Uint32Array]';

/** Used to identify `toStringTag` values supported by `_.clone`. */
var cloneableTags = {};
cloneableTags[argsTag$1] = cloneableTags[arrayTag$1] =
cloneableTags[arrayBufferTag$1] = cloneableTags[dataViewTag$1] =
cloneableTags[boolTag$1] = cloneableTags[dateTag$1] =
cloneableTags[float32Tag] = cloneableTags[float64Tag] =
cloneableTags[int8Tag] = cloneableTags[int16Tag] =
cloneableTags[int32Tag] = cloneableTags[mapTag$1] =
cloneableTags[numberTag$1] = cloneableTags[objectTag$2] =
cloneableTags[regexpTag$1] = cloneableTags[setTag$1] =
cloneableTags[stringTag$1] = cloneableTags[symbolTag$1] =
cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
cloneableTags[errorTag$2] = cloneableTags[funcTag] =
cloneableTags[weakMapTag$1] = false;

/**
 * The base implementation of `_.clone` and `_.cloneDeep` which tracks
 * traversed objects.
 *
 * @private
 * @param {*} value The value to clone.
 * @param {boolean} bitmask The bitmask flags.
 *  1 - Deep clone
 *  2 - Flatten inherited properties
 *  4 - Clone symbols
 * @param {Function} [customizer] The function to customize cloning.
 * @param {string} [key] The key of `value`.
 * @param {Object} [object] The parent object of `value`.
 * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
 * @returns {*} Returns the cloned value.
 */
function baseClone(value, bitmask, customizer, key, object, stack) {
  var result,
      isDeep = bitmask & CLONE_DEEP_FLAG$1,
      isFlat = bitmask & CLONE_FLAT_FLAG,
      isFull = bitmask & CLONE_SYMBOLS_FLAG$1;

  if (customizer) {
    result = object ? customizer(value, key, object, stack) : customizer(value);
  }
  if (result !== undefined) {
    return result;
  }
  if (!isObject_1(value)) {
    return value;
  }
  var isArr = isArray_1(value);
  if (isArr) {
    result = _initCloneArray(value);
    if (!isDeep) {
      return _copyArray(value, result);
    }
  } else {
    var tag = _getTag(value),
        isFunc = tag == funcTag || tag == genTag;

    if (isBuffer_1(value)) {
      return _cloneBuffer(value, isDeep);
    }
    if (tag == objectTag$2 || tag == argsTag$1 || (isFunc && !object)) {
      result = (isFlat || isFunc) ? {} : _initCloneObject(value);
      if (!isDeep) {
        return isFlat
          ? _copySymbolsIn(value, _baseAssignIn(result, value))
          : _copySymbols(value, _baseAssign(result, value));
      }
    } else {
      if (!cloneableTags[tag]) {
        return object ? value : {};
      }
      result = _initCloneByTag(value, tag, isDeep);
    }
  }
  // Check for circular references and return its corresponding clone.
  stack || (stack = new _Stack);
  var stacked = stack.get(value);
  if (stacked) {
    return stacked;
  }
  stack.set(value, result);

  if (isSet_1(value)) {
    value.forEach(function(subValue) {
      result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
    });
  } else if (isMap_1(value)) {
    value.forEach(function(subValue, key) {
      result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
    });
  }

  var keysFunc = isFull
    ? (isFlat ? _getAllKeysIn : _getAllKeys)
    : (isFlat ? keysIn_1 : keys_1);

  var props = isArr ? undefined : keysFunc(value);
  _arrayEach(props || value, function(subValue, key) {
    if (props) {
      key = subValue;
      subValue = value[key];
    }
    // Recursively populate clone (susceptible to call stack limits).
    _assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
  });
  return result;
}

var _baseClone = baseClone;

/** Used to compose bitmasks for cloning. */
var CLONE_SYMBOLS_FLAG = 4;

/**
 * Creates a shallow clone of `value`.
 *
 * **Note:** This method is loosely based on the
 * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
 * and supports cloning arrays, array buffers, booleans, date objects, maps,
 * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
 * arrays. The own enumerable properties of `arguments` objects are cloned
 * as plain objects. An empty object is returned for uncloneable values such
 * as error objects, functions, DOM nodes, and WeakMaps.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Lang
 * @param {*} value The value to clone.
 * @returns {*} Returns the cloned value.
 * @see _.cloneDeep
 * @example
 *
 * var objects = [{ 'a': 1 }, { 'b': 2 }];
 *
 * var shallow = _.clone(objects);
 * console.log(shallow[0] === objects[0]);
 * // => true
 */
function clone(value) {
  return _baseClone(value, CLONE_SYMBOLS_FLAG);
}

var clone_1 = clone;

/** `Object#toString` result references. */
var objectTag$1 = '[object Object]';

/** Used for built-in method references. */
var funcProto = Function.prototype,
    objectProto$2 = Object.prototype;

/** Used to resolve the decompiled source of functions. */
var funcToString = funcProto.toString;

/** Used to check objects for own properties. */
var hasOwnProperty$2 = objectProto$2.hasOwnProperty;

/** Used to infer the `Object` constructor. */
var objectCtorString = funcToString.call(Object);

/**
 * Checks if `value` is a plain object, that is, an object created by the
 * `Object` constructor or one with a `[[Prototype]]` of `null`.
 *
 * @static
 * @memberOf _
 * @since 0.8.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
 * @example
 *
 * function Foo() {
 *   this.a = 1;
 * }
 *
 * _.isPlainObject(new Foo);
 * // => false
 *
 * _.isPlainObject([1, 2, 3]);
 * // => false
 *
 * _.isPlainObject({ 'x': 0, 'y': 0 });
 * // => true
 *
 * _.isPlainObject(Object.create(null));
 * // => true
 */
function isPlainObject(value) {
  if (!isObjectLike_1(value) || _baseGetTag(value) != objectTag$1) {
    return false;
  }
  var proto = _getPrototype(value);
  if (proto === null) {
    return true;
  }
  var Ctor = hasOwnProperty$2.call(proto, 'constructor') && proto.constructor;
  return typeof Ctor == 'function' && Ctor instanceof Ctor &&
    funcToString.call(Ctor) == objectCtorString;
}

var isPlainObject_1 = isPlainObject;

/** `Object#toString` result references. */
var domExcTag = '[object DOMException]',
    errorTag$1 = '[object Error]';

/**
 * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
 * `SyntaxError`, `TypeError`, or `URIError` object.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
 * @example
 *
 * _.isError(new Error);
 * // => true
 *
 * _.isError(Error);
 * // => false
 */
function isError(value) {
  if (!isObjectLike_1(value)) {
    return false;
  }
  var tag = _baseGetTag(value);
  return tag == errorTag$1 || tag == domExcTag ||
    (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject_1(value));
}

var isError_1 = isError;

/** `Object#toString` result references. */
var weakMapTag = '[object WeakMap]';

/**
 * Checks if `value` is classified as a `WeakMap` object.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
 * @example
 *
 * _.isWeakMap(new WeakMap);
 * // => true
 *
 * _.isWeakMap(new Map);
 * // => false
 */
function isWeakMap(value) {
  return isObjectLike_1(value) && _getTag(value) == weakMapTag;
}

var isWeakMap_1 = isWeakMap;

/** Used to stand-in for `undefined` hash values. */
var HASH_UNDEFINED = '__lodash_hash_undefined__';

/**
 * Adds `value` to the array cache.
 *
 * @private
 * @name add
 * @memberOf SetCache
 * @alias push
 * @param {*} value The value to cache.
 * @returns {Object} Returns the cache instance.
 */
function setCacheAdd(value) {
  this.__data__.set(value, HASH_UNDEFINED);
  return this;
}

var _setCacheAdd = setCacheAdd;

/**
 * Checks if `value` is in the array cache.
 *
 * @private
 * @name has
 * @memberOf SetCache
 * @param {*} value The value to search for.
 * @returns {number} Returns `true` if `value` is found, else `false`.
 */
function setCacheHas(value) {
  return this.__data__.has(value);
}

var _setCacheHas = setCacheHas;

/**
 *
 * Creates an array cache object to store unique values.
 *
 * @private
 * @constructor
 * @param {Array} [values] The values to cache.
 */
function SetCache(values) {
  var index = -1,
      length = values == null ? 0 : values.length;

  this.__data__ = new _MapCache;
  while (++index < length) {
    this.add(values[index]);
  }
}

// Add methods to `SetCache`.
SetCache.prototype.add = SetCache.prototype.push = _setCacheAdd;
SetCache.prototype.has = _setCacheHas;

var _SetCache = SetCache;

/**
 * A specialized version of `_.some` for arrays without support for iteratee
 * shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} predicate The function invoked per iteration.
 * @returns {boolean} Returns `true` if any element passes the predicate check,
 *  else `false`.
 */
function arraySome(array, predicate) {
  var index = -1,
      length = array == null ? 0 : array.length;

  while (++index < length) {
    if (predicate(array[index], index, array)) {
      return true;
    }
  }
  return false;
}

var _arraySome = arraySome;

/**
 * Checks if a `cache` value for `key` exists.
 *
 * @private
 * @param {Object} cache The cache to query.
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function cacheHas(cache, key) {
  return cache.has(key);
}

var _cacheHas = cacheHas;

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG$5 = 1,
    COMPARE_UNORDERED_FLAG$3 = 2;

/**
 * A specialized version of `baseIsEqualDeep` for arrays with support for
 * partial deep comparisons.
 *
 * @private
 * @param {Array} array The array to compare.
 * @param {Array} other The other array to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} stack Tracks traversed `array` and `other` objects.
 * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
 */
function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
  var isPartial = bitmask & COMPARE_PARTIAL_FLAG$5,
      arrLength = array.length,
      othLength = other.length;

  if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
    return false;
  }
  // Check that cyclic values are equal.
  var arrStacked = stack.get(array);
  var othStacked = stack.get(other);
  if (arrStacked && othStacked) {
    return arrStacked == other && othStacked == array;
  }
  var index = -1,
      result = true,
      seen = (bitmask & COMPARE_UNORDERED_FLAG$3) ? new _SetCache : undefined;

  stack.set(array, other);
  stack.set(other, array);

  // Ignore non-index properties.
  while (++index < arrLength) {
    var arrValue = array[index],
        othValue = other[index];

    if (customizer) {
      var compared = isPartial
        ? customizer(othValue, arrValue, index, other, array, stack)
        : customizer(arrValue, othValue, index, array, other, stack);
    }
    if (compared !== undefined) {
      if (compared) {
        continue;
      }
      result = false;
      break;
    }
    // Recursively compare arrays (susceptible to call stack limits).
    if (seen) {
      if (!_arraySome(other, function(othValue, othIndex) {
            if (!_cacheHas(seen, othIndex) &&
                (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
              return seen.push(othIndex);
            }
          })) {
        result = false;
        break;
      }
    } else if (!(
          arrValue === othValue ||
            equalFunc(arrValue, othValue, bitmask, customizer, stack)
        )) {
      result = false;
      break;
    }
  }
  stack['delete'](array);
  stack['delete'](other);
  return result;
}

var _equalArrays = equalArrays;

/**
 * Converts `map` to its key-value pairs.
 *
 * @private
 * @param {Object} map The map to convert.
 * @returns {Array} Returns the key-value pairs.
 */
function mapToArray(map) {
  var index = -1,
      result = Array(map.size);

  map.forEach(function(value, key) {
    result[++index] = [key, value];
  });
  return result;
}

var _mapToArray = mapToArray;

/**
 * Converts `set` to an array of its values.
 *
 * @private
 * @param {Object} set The set to convert.
 * @returns {Array} Returns the values.
 */
function setToArray(set) {
  var index = -1,
      result = Array(set.size);

  set.forEach(function(value) {
    result[++index] = value;
  });
  return result;
}

var _setToArray = setToArray;

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG$4 = 1,
    COMPARE_UNORDERED_FLAG$2 = 2;

/** `Object#toString` result references. */
var boolTag = '[object Boolean]',
    dateTag = '[object Date]',
    errorTag = '[object Error]',
    mapTag = '[object Map]',
    numberTag = '[object Number]',
    regexpTag = '[object RegExp]',
    setTag = '[object Set]',
    stringTag = '[object String]',
    symbolTag = '[object Symbol]';

var arrayBufferTag = '[object ArrayBuffer]',
    dataViewTag = '[object DataView]';

/** Used to convert symbols to primitives and strings. */
var symbolProto$1 = _Symbol ? _Symbol.prototype : undefined,
    symbolValueOf = symbolProto$1 ? symbolProto$1.valueOf : undefined;

/**
 * A specialized version of `baseIsEqualDeep` for comparing objects of
 * the same `toStringTag`.
 *
 * **Note:** This function only supports comparing values with tags of
 * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
 *
 * @private
 * @param {Object} object The object to compare.
 * @param {Object} other The other object to compare.
 * @param {string} tag The `toStringTag` of the objects to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} stack Tracks traversed `object` and `other` objects.
 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
 */
function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
  switch (tag) {
    case dataViewTag:
      if ((object.byteLength != other.byteLength) ||
          (object.byteOffset != other.byteOffset)) {
        return false;
      }
      object = object.buffer;
      other = other.buffer;

    case arrayBufferTag:
      if ((object.byteLength != other.byteLength) ||
          !equalFunc(new _Uint8Array(object), new _Uint8Array(other))) {
        return false;
      }
      return true;

    case boolTag:
    case dateTag:
    case numberTag:
      // Coerce booleans to `1` or `0` and dates to milliseconds.
      // Invalid dates are coerced to `NaN`.
      return eq_1(+object, +other);

    case errorTag:
      return object.name == other.name && object.message == other.message;

    case regexpTag:
    case stringTag:
      // Coerce regexes to strings and treat strings, primitives and objects,
      // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
      // for more details.
      return object == (other + '');

    case mapTag:
      var convert = _mapToArray;

    case setTag:
      var isPartial = bitmask & COMPARE_PARTIAL_FLAG$4;
      convert || (convert = _setToArray);

      if (object.size != other.size && !isPartial) {
        return false;
      }
      // Assume cyclic values are equal.
      var stacked = stack.get(object);
      if (stacked) {
        return stacked == other;
      }
      bitmask |= COMPARE_UNORDERED_FLAG$2;

      // Recursively compare objects (susceptible to call stack limits).
      stack.set(object, other);
      var result = _equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
      stack['delete'](object);
      return result;

    case symbolTag:
      if (symbolValueOf) {
        return symbolValueOf.call(object) == symbolValueOf.call(other);
      }
  }
  return false;
}

var _equalByTag = equalByTag;

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG$3 = 1;

/** Used for built-in method references. */
var objectProto$1 = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$1.hasOwnProperty;

/**
 * A specialized version of `baseIsEqualDeep` for objects with support for
 * partial deep comparisons.
 *
 * @private
 * @param {Object} object The object to compare.
 * @param {Object} other The other object to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} stack Tracks traversed `object` and `other` objects.
 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
 */
function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
  var isPartial = bitmask & COMPARE_PARTIAL_FLAG$3,
      objProps = _getAllKeys(object),
      objLength = objProps.length,
      othProps = _getAllKeys(other),
      othLength = othProps.length;

  if (objLength != othLength && !isPartial) {
    return false;
  }
  var index = objLength;
  while (index--) {
    var key = objProps[index];
    if (!(isPartial ? key in other : hasOwnProperty$1.call(other, key))) {
      return false;
    }
  }
  // Check that cyclic values are equal.
  var objStacked = stack.get(object);
  var othStacked = stack.get(other);
  if (objStacked && othStacked) {
    return objStacked == other && othStacked == object;
  }
  var result = true;
  stack.set(object, other);
  stack.set(other, object);

  var skipCtor = isPartial;
  while (++index < objLength) {
    key = objProps[index];
    var objValue = object[key],
        othValue = other[key];

    if (customizer) {
      var compared = isPartial
        ? customizer(othValue, objValue, key, other, object, stack)
        : customizer(objValue, othValue, key, object, other, stack);
    }
    // Recursively compare objects (susceptible to call stack limits).
    if (!(compared === undefined
          ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
          : compared
        )) {
      result = false;
      break;
    }
    skipCtor || (skipCtor = key == 'constructor');
  }
  if (result && !skipCtor) {
    var objCtor = object.constructor,
        othCtor = other.constructor;

    // Non `Object` object instances with different constructors are not equal.
    if (objCtor != othCtor &&
        ('constructor' in object && 'constructor' in other) &&
        !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
          typeof othCtor == 'function' && othCtor instanceof othCtor)) {
      result = false;
    }
  }
  stack['delete'](object);
  stack['delete'](other);
  return result;
}

var _equalObjects = equalObjects;

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG$2 = 1;

/** `Object#toString` result references. */
var argsTag = '[object Arguments]',
    arrayTag = '[object Array]',
    objectTag = '[object Object]';

/** Used for built-in method references. */
var objectProto = Object.prototype;

/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;

/**
 * A specialized version of `baseIsEqual` for arrays and objects which performs
 * deep comparisons and tracks traversed objects enabling objects with circular
 * references to be compared.
 *
 * @private
 * @param {Object} object The object to compare.
 * @param {Object} other The other object to compare.
 * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
 * @param {Function} customizer The function to customize comparisons.
 * @param {Function} equalFunc The function to determine equivalents of values.
 * @param {Object} [stack] Tracks traversed `object` and `other` objects.
 * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
 */
function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
  var objIsArr = isArray_1(object),
      othIsArr = isArray_1(other),
      objTag = objIsArr ? arrayTag : _getTag(object),
      othTag = othIsArr ? arrayTag : _getTag(other);

  objTag = objTag == argsTag ? objectTag : objTag;
  othTag = othTag == argsTag ? objectTag : othTag;

  var objIsObj = objTag == objectTag,
      othIsObj = othTag == objectTag,
      isSameTag = objTag == othTag;

  if (isSameTag && isBuffer_1(object)) {
    if (!isBuffer_1(other)) {
      return false;
    }
    objIsArr = true;
    objIsObj = false;
  }
  if (isSameTag && !objIsObj) {
    stack || (stack = new _Stack);
    return (objIsArr || isTypedArray_1(object))
      ? _equalArrays(object, other, bitmask, customizer, equalFunc, stack)
      : _equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
  }
  if (!(bitmask & COMPARE_PARTIAL_FLAG$2)) {
    var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
        othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

    if (objIsWrapped || othIsWrapped) {
      var objUnwrapped = objIsWrapped ? object.value() : object,
          othUnwrapped = othIsWrapped ? other.value() : other;

      stack || (stack = new _Stack);
      return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
    }
  }
  if (!isSameTag) {
    return false;
  }
  stack || (stack = new _Stack);
  return _equalObjects(object, other, bitmask, customizer, equalFunc, stack);
}

var _baseIsEqualDeep = baseIsEqualDeep;

/**
 * The base implementation of `_.isEqual` which supports partial comparisons
 * and tracks traversed objects.
 *
 * @private
 * @param {*} value The value to compare.
 * @param {*} other The other value to compare.
 * @param {boolean} bitmask The bitmask flags.
 *  1 - Unordered comparison
 *  2 - Partial comparison
 * @param {Function} [customizer] The function to customize comparisons.
 * @param {Object} [stack] Tracks traversed `value` and `other` objects.
 * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
 */
function baseIsEqual(value, other, bitmask, customizer, stack) {
  if (value === other) {
    return true;
  }
  if (value == null || other == null || (!isObjectLike_1(value) && !isObjectLike_1(other))) {
    return value !== value && other !== other;
  }
  return _baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
}

var _baseIsEqual = baseIsEqual;

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG$1 = 1,
    COMPARE_UNORDERED_FLAG$1 = 2;

/**
 * The base implementation of `_.isMatch` without support for iteratee shorthands.
 *
 * @private
 * @param {Object} object The object to inspect.
 * @param {Object} source The object of property values to match.
 * @param {Array} matchData The property names, values, and compare flags to match.
 * @param {Function} [customizer] The function to customize comparisons.
 * @returns {boolean} Returns `true` if `object` is a match, else `false`.
 */
function baseIsMatch(object, source, matchData, customizer) {
  var index = matchData.length,
      length = index,
      noCustomizer = !customizer;

  if (object == null) {
    return !length;
  }
  object = Object(object);
  while (index--) {
    var data = matchData[index];
    if ((noCustomizer && data[2])
          ? data[1] !== object[data[0]]
          : !(data[0] in object)
        ) {
      return false;
    }
  }
  while (++index < length) {
    data = matchData[index];
    var key = data[0],
        objValue = object[key],
        srcValue = data[1];

    if (noCustomizer && data[2]) {
      if (objValue === undefined && !(key in object)) {
        return false;
      }
    } else {
      var stack = new _Stack;
      if (customizer) {
        var result = customizer(objValue, srcValue, key, object, source, stack);
      }
      if (!(result === undefined
            ? _baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG$1 | COMPARE_UNORDERED_FLAG$1, customizer, stack)
            : result
          )) {
        return false;
      }
    }
  }
  return true;
}

var _baseIsMatch = baseIsMatch;

/**
 * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` if suitable for strict
 *  equality comparisons, else `false`.
 */
function isStrictComparable(value) {
  return value === value && !isObject_1(value);
}

var _isStrictComparable = isStrictComparable;

/**
 * Gets the property names, values, and compare flags of `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @returns {Array} Returns the match data of `object`.
 */
function getMatchData(object) {
  var result = keys_1(object),
      length = result.length;

  while (length--) {
    var key = result[length],
        value = object[key];

    result[length] = [key, value, _isStrictComparable(value)];
  }
  return result;
}

var _getMatchData = getMatchData;

/**
 * A specialized version of `matchesProperty` for source values suitable
 * for strict equality comparisons, i.e. `===`.
 *
 * @private
 * @param {string} key The key of the property to get.
 * @param {*} srcValue The value to match.
 * @returns {Function} Returns the new spec function.
 */
function matchesStrictComparable(key, srcValue) {
  return function(object) {
    if (object == null) {
      return false;
    }
    return object[key] === srcValue &&
      (srcValue !== undefined || (key in Object(object)));
  };
}

var _matchesStrictComparable = matchesStrictComparable;

/**
 * The base implementation of `_.matches` which doesn't clone `source`.
 *
 * @private
 * @param {Object} source The object of property values to match.
 * @returns {Function} Returns the new spec function.
 */
function baseMatches(source) {
  var matchData = _getMatchData(source);
  if (matchData.length == 1 && matchData[0][2]) {
    return _matchesStrictComparable(matchData[0][0], matchData[0][1]);
  }
  return function(object) {
    return object === source || _baseIsMatch(object, source, matchData);
  };
}

var _baseMatches = baseMatches;

/** Used to match property names within property paths. */
var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
    reIsPlainProp = /^\w*$/;

/**
 * Checks if `value` is a property name and not a property path.
 *
 * @private
 * @param {*} value The value to check.
 * @param {Object} [object] The object to query keys on.
 * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
 */
function isKey(value, object) {
  if (isArray_1(value)) {
    return false;
  }
  var type = typeof value;
  if (type == 'number' || type == 'symbol' || type == 'boolean' ||
      value == null || isSymbol_1(value)) {
    return true;
  }
  return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
    (object != null && value in Object(object));
}

var _isKey = isKey;

/** Error message constants. */
var FUNC_ERROR_TEXT = 'Expected a function';

/**
 * Creates a function that memoizes the result of `func`. If `resolver` is
 * provided, it determines the cache key for storing the result based on the
 * arguments provided to the memoized function. By default, the first argument
 * provided to the memoized function is used as the map cache key. The `func`
 * is invoked with the `this` binding of the memoized function.
 *
 * **Note:** The cache is exposed as the `cache` property on the memoized
 * function. Its creation may be customized by replacing the `_.memoize.Cache`
 * constructor with one whose instances implement the
 * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
 * method interface of `clear`, `delete`, `get`, `has`, and `set`.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Function
 * @param {Function} func The function to have its output memoized.
 * @param {Function} [resolver] The function to resolve the cache key.
 * @returns {Function} Returns the new memoized function.
 * @example
 *
 * var object = { 'a': 1, 'b': 2 };
 * var other = { 'c': 3, 'd': 4 };
 *
 * var values = _.memoize(_.values);
 * values(object);
 * // => [1, 2]
 *
 * values(other);
 * // => [3, 4]
 *
 * object.a = 2;
 * values(object);
 * // => [1, 2]
 *
 * // Modify the result cache.
 * values.cache.set(object, ['a', 'b']);
 * values(object);
 * // => ['a', 'b']
 *
 * // Replace `_.memoize.Cache`.
 * _.memoize.Cache = WeakMap;
 */
function memoize(func, resolver) {
  if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
    throw new TypeError(FUNC_ERROR_TEXT);
  }
  var memoized = function() {
    var args = arguments,
        key = resolver ? resolver.apply(this, args) : args[0],
        cache = memoized.cache;

    if (cache.has(key)) {
      return cache.get(key);
    }
    var result = func.apply(this, args);
    memoized.cache = cache.set(key, result) || cache;
    return result;
  };
  memoized.cache = new (memoize.Cache || _MapCache);
  return memoized;
}

// Expose `MapCache`.
memoize.Cache = _MapCache;

var memoize_1 = memoize;

/** Used as the maximum memoize cache size. */
var MAX_MEMOIZE_SIZE = 500;

/**
 * A specialized version of `_.memoize` which clears the memoized function's
 * cache when it exceeds `MAX_MEMOIZE_SIZE`.
 *
 * @private
 * @param {Function} func The function to have its output memoized.
 * @returns {Function} Returns the new memoized function.
 */
function memoizeCapped(func) {
  var result = memoize_1(func, function(key) {
    if (cache.size === MAX_MEMOIZE_SIZE) {
      cache.clear();
    }
    return key;
  });

  var cache = result.cache;
  return result;
}

var _memoizeCapped = memoizeCapped;

/** Used to match property names within property paths. */
var rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;

/** Used to match backslashes in property paths. */
var reEscapeChar = /\\(\\)?/g;

/**
 * Converts `string` to a property path array.
 *
 * @private
 * @param {string} string The string to convert.
 * @returns {Array} Returns the property path array.
 */
var stringToPath = _memoizeCapped(function(string) {
  var result = [];
  if (string.charCodeAt(0) === 46 /* . */) {
    result.push('');
  }
  string.replace(rePropName, function(match, number, quote, subString) {
    result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
  });
  return result;
});

var _stringToPath = stringToPath;

/**
 * A specialized version of `_.map` for arrays without support for iteratee
 * shorthands.
 *
 * @private
 * @param {Array} [array] The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @returns {Array} Returns the new mapped array.
 */
function arrayMap(array, iteratee) {
  var index = -1,
      length = array == null ? 0 : array.length,
      result = Array(length);

  while (++index < length) {
    result[index] = iteratee(array[index], index, array);
  }
  return result;
}

var _arrayMap = arrayMap;

/** Used as references for various `Number` constants. */
var INFINITY$1 = 1 / 0;

/** Used to convert symbols to primitives and strings. */
var symbolProto = _Symbol ? _Symbol.prototype : undefined,
    symbolToString = symbolProto ? symbolProto.toString : undefined;

/**
 * The base implementation of `_.toString` which doesn't convert nullish
 * values to empty strings.
 *
 * @private
 * @param {*} value The value to process.
 * @returns {string} Returns the string.
 */
function baseToString(value) {
  // Exit early for strings to avoid a performance hit in some environments.
  if (typeof value == 'string') {
    return value;
  }
  if (isArray_1(value)) {
    // Recursively convert values (susceptible to call stack limits).
    return _arrayMap(value, baseToString) + '';
  }
  if (isSymbol_1(value)) {
    return symbolToString ? symbolToString.call(value) : '';
  }
  var result = (value + '');
  return (result == '0' && (1 / value) == -INFINITY$1) ? '-0' : result;
}

var _baseToString = baseToString;

/**
 * Converts `value` to a string. An empty string is returned for `null`
 * and `undefined` values. The sign of `-0` is preserved.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Lang
 * @param {*} value The value to convert.
 * @returns {string} Returns the converted string.
 * @example
 *
 * _.toString(null);
 * // => ''
 *
 * _.toString(-0);
 * // => '-0'
 *
 * _.toString([1, 2, 3]);
 * // => '1,2,3'
 */
function toString(value) {
  return value == null ? '' : _baseToString(value);
}

var toString_1 = toString;

/**
 * Casts `value` to a path array if it's not one.
 *
 * @private
 * @param {*} value The value to inspect.
 * @param {Object} [object] The object to query keys on.
 * @returns {Array} Returns the cast property path array.
 */
function castPath(value, object) {
  if (isArray_1(value)) {
    return value;
  }
  return _isKey(value, object) ? [value] : _stringToPath(toString_1(value));
}

var _castPath = castPath;

/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;

/**
 * Converts `value` to a string key if it's not a string or symbol.
 *
 * @private
 * @param {*} value The value to inspect.
 * @returns {string|symbol} Returns the key.
 */
function toKey(value) {
  if (typeof value == 'string' || isSymbol_1(value)) {
    return value;
  }
  var result = (value + '');
  return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}

var _toKey = toKey;

/**
 * The base implementation of `_.get` without support for default values.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {Array|string} path The path of the property to get.
 * @returns {*} Returns the resolved value.
 */
function baseGet(object, path) {
  path = _castPath(path, object);

  var index = 0,
      length = path.length;

  while (object != null && index < length) {
    object = object[_toKey(path[index++])];
  }
  return (index && index == length) ? object : undefined;
}

var _baseGet = baseGet;

/**
 * Gets the value at `path` of `object`. If the resolved value is
 * `undefined`, the `defaultValue` is returned in its place.
 *
 * @static
 * @memberOf _
 * @since 3.7.0
 * @category Object
 * @param {Object} object The object to query.
 * @param {Array|string} path The path of the property to get.
 * @param {*} [defaultValue] The value returned for `undefined` resolved values.
 * @returns {*} Returns the resolved value.
 * @example
 *
 * var object = { 'a': [{ 'b': { 'c': 3 } }] };
 *
 * _.get(object, 'a[0].b.c');
 * // => 3
 *
 * _.get(object, ['a', '0', 'b', 'c']);
 * // => 3
 *
 * _.get(object, 'a.b.c', 'default');
 * // => 'default'
 */
function get$1(object, path, defaultValue) {
  var result = object == null ? undefined : _baseGet(object, path);
  return result === undefined ? defaultValue : result;
}

var get_1 = get$1;

/**
 * The base implementation of `_.hasIn` without support for deep paths.
 *
 * @private
 * @param {Object} [object] The object to query.
 * @param {Array|string} key The key to check.
 * @returns {boolean} Returns `true` if `key` exists, else `false`.
 */
function baseHasIn(object, key) {
  return object != null && key in Object(object);
}

var _baseHasIn = baseHasIn;

/**
 * Checks if `path` exists on `object`.
 *
 * @private
 * @param {Object} object The object to query.
 * @param {Array|string} path The path to check.
 * @param {Function} hasFunc The function to check properties.
 * @returns {boolean} Returns `true` if `path` exists, else `false`.
 */
function hasPath(object, path, hasFunc) {
  path = _castPath(path, object);

  var index = -1,
      length = path.length,
      result = false;

  while (++index < length) {
    var key = _toKey(path[index]);
    if (!(result = object != null && hasFunc(object, key))) {
      break;
    }
    object = object[key];
  }
  if (result || ++index != length) {
    return result;
  }
  length = object == null ? 0 : object.length;
  return !!length && isLength_1(length) && _isIndex(key, length) &&
    (isArray_1(object) || isArguments_1(object));
}

var _hasPath = hasPath;

/**
 * Checks if `path` is a direct or inherited property of `object`.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Object
 * @param {Object} object The object to query.
 * @param {Array|string} path The path to check.
 * @returns {boolean} Returns `true` if `path` exists, else `false`.
 * @example
 *
 * var object = _.create({ 'a': _.create({ 'b': 2 }) });
 *
 * _.hasIn(object, 'a');
 * // => true
 *
 * _.hasIn(object, 'a.b');
 * // => true
 *
 * _.hasIn(object, ['a', 'b']);
 * // => true
 *
 * _.hasIn(object, 'b');
 * // => false
 */
function hasIn(object, path) {
  return object != null && _hasPath(object, path, _baseHasIn);
}

var hasIn_1 = hasIn;

/** Used to compose bitmasks for value comparisons. */
var COMPARE_PARTIAL_FLAG = 1,
    COMPARE_UNORDERED_FLAG = 2;

/**
 * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
 *
 * @private
 * @param {string} path The path of the property to get.
 * @param {*} srcValue The value to match.
 * @returns {Function} Returns the new spec function.
 */
function baseMatchesProperty(path, srcValue) {
  if (_isKey(path) && _isStrictComparable(srcValue)) {
    return _matchesStrictComparable(_toKey(path), srcValue);
  }
  return function(object) {
    var objValue = get_1(object, path);
    return (objValue === undefined && objValue === srcValue)
      ? hasIn_1(object, path)
      : _baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
  };
}

var _baseMatchesProperty = baseMatchesProperty;

/**
 * The base implementation of `_.property` without support for deep paths.
 *
 * @private
 * @param {string} key The key of the property to get.
 * @returns {Function} Returns the new accessor function.
 */
function baseProperty(key) {
  return function(object) {
    return object == null ? undefined : object[key];
  };
}

var _baseProperty = baseProperty;

/**
 * A specialized version of `baseProperty` which supports deep paths.
 *
 * @private
 * @param {Array|string} path The path of the property to get.
 * @returns {Function} Returns the new accessor function.
 */
function basePropertyDeep(path) {
  return function(object) {
    return _baseGet(object, path);
  };
}

var _basePropertyDeep = basePropertyDeep;

/**
 * Creates a function that returns the value at `path` of a given object.
 *
 * @static
 * @memberOf _
 * @since 2.4.0
 * @category Util
 * @param {Array|string} path The path of the property to get.
 * @returns {Function} Returns the new accessor function.
 * @example
 *
 * var objects = [
 *   { 'a': { 'b': 2 } },
 *   { 'a': { 'b': 1 } }
 * ];
 *
 * _.map(objects, _.property('a.b'));
 * // => [2, 1]
 *
 * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
 * // => [1, 2]
 */
function property(path) {
  return _isKey(path) ? _baseProperty(_toKey(path)) : _basePropertyDeep(path);
}

var property_1 = property;

/**
 * The base implementation of `_.iteratee`.
 *
 * @private
 * @param {*} [value=_.identity] The value to convert to an iteratee.
 * @returns {Function} Returns the iteratee.
 */
function baseIteratee(value) {
  // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
  // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
  if (typeof value == 'function') {
    return value;
  }
  if (value == null) {
    return identity_1;
  }
  if (typeof value == 'object') {
    return isArray_1(value)
      ? _baseMatchesProperty(value[0], value[1])
      : _baseMatches(value);
  }
  return property_1(value);
}

var _baseIteratee = baseIteratee;

/** Used to compose bitmasks for cloning. */
var CLONE_DEEP_FLAG = 1;

/**
 * Creates a function that invokes `func` with the arguments of the created
 * function. If `func` is a property name, the created function returns the
 * property value for a given element. If `func` is an array or object, the
 * created function returns `true` for elements that contain the equivalent
 * source properties, otherwise it returns `false`.
 *
 * @static
 * @since 4.0.0
 * @memberOf _
 * @category Util
 * @param {*} [func=_.identity] The value to convert to a callback.
 * @returns {Function} Returns the callback.
 * @example
 *
 * var users = [
 *   { 'user': 'barney', 'age': 36, 'active': true },
 *   { 'user': 'fred',   'age': 40, 'active': false }
 * ];
 *
 * // The `_.matches` iteratee shorthand.
 * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
 * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
 *
 * // The `_.matchesProperty` iteratee shorthand.
 * _.filter(users, _.iteratee(['user', 'fred']));
 * // => [{ 'user': 'fred', 'age': 40 }]
 *
 * // The `_.property` iteratee shorthand.
 * _.map(users, _.iteratee('user'));
 * // => ['barney', 'fred']
 *
 * // Create custom iteratee shorthands.
 * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
 *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
 *     return func.test(string);
 *   };
 * });
 *
 * _.filter(['abc', 'def'], /ef/);
 * // => ['def']
 */
function iteratee(func) {
  return _baseIteratee(typeof func == 'function' ? func : _baseClone(func, CLONE_DEEP_FLAG));
}

var iteratee_1 = iteratee;

/** Built-in value references. */
var spreadableSymbol = _Symbol ? _Symbol.isConcatSpreadable : undefined;

/**
 * Checks if `value` is a flattenable `arguments` object or array.
 *
 * @private
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
 */
function isFlattenable(value) {
  return isArray_1(value) || isArguments_1(value) ||
    !!(spreadableSymbol && value && value[spreadableSymbol]);
}

var _isFlattenable = isFlattenable;

/**
 * The base implementation of `_.flatten` with support for restricting flattening.
 *
 * @private
 * @param {Array} array The array to flatten.
 * @param {number} depth The maximum recursion depth.
 * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
 * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
 * @param {Array} [result=[]] The initial result value.
 * @returns {Array} Returns the new flattened array.
 */
function baseFlatten(array, depth, predicate, isStrict, result) {
  var index = -1,
      length = array.length;

  predicate || (predicate = _isFlattenable);
  result || (result = []);

  while (++index < length) {
    var value = array[index];
    if (depth > 0 && predicate(value)) {
      if (depth > 1) {
        // Recursively flatten arrays (susceptible to call stack limits).
        baseFlatten(value, depth - 1, predicate, isStrict, result);
      } else {
        _arrayPush(result, value);
      }
    } else if (!isStrict) {
      result[result.length] = value;
    }
  }
  return result;
}

var _baseFlatten = baseFlatten;

/**
 * Flattens `array` a single level deep.
 *
 * @static
 * @memberOf _
 * @since 0.1.0
 * @category Array
 * @param {Array} array The array to flatten.
 * @returns {Array} Returns the new flattened array.
 * @example
 *
 * _.flatten([1, [2, [3, [4]], 5]]);
 * // => [1, 2, [3, [4]], 5]
 */
function flatten(array) {
  var length = array == null ? 0 : array.length;
  return length ? _baseFlatten(array, 1) : [];
}

var flatten_1 = flatten;

/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax = Math.max;

/**
 * A specialized version of `baseRest` which transforms the rest array.
 *
 * @private
 * @param {Function} func The function to apply a rest parameter to.
 * @param {number} [start=func.length-1] The start position of the rest parameter.
 * @param {Function} transform The rest array transform.
 * @returns {Function} Returns the new function.
 */
function overRest(func, start, transform) {
  start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
  return function() {
    var args = arguments,
        index = -1,
        length = nativeMax(args.length - start, 0),
        array = Array(length);

    while (++index < length) {
      array[index] = args[start + index];
    }
    index = -1;
    var otherArgs = Array(start + 1);
    while (++index < start) {
      otherArgs[index] = args[index];
    }
    otherArgs[start] = transform(array);
    return _apply(func, this, otherArgs);
  };
}

var _overRest = overRest;

/**
 * A specialized version of `baseRest` which flattens the rest array.
 *
 * @private
 * @param {Function} func The function to apply a rest parameter to.
 * @returns {Function} Returns the new function.
 */
function flatRest(func) {
  return _setToString(_overRest(func, undefined, flatten_1), func + '');
}

var _flatRest = flatRest;

/** Used to compose bitmasks for function metadata. */
var WRAP_REARG_FLAG = 256;

/**
 * Creates a function that invokes `func` with arguments arranged according
 * to the specified `indexes` where the argument value at the first index is
 * provided as the first argument, the argument value at the second index is
 * provided as the second argument, and so on.
 *
 * @static
 * @memberOf _
 * @since 3.0.0
 * @category Function
 * @param {Function} func The function to rearrange arguments for.
 * @param {...(number|number[])} indexes The arranged argument indexes.
 * @returns {Function} Returns the new function.
 * @example
 *
 * var rearged = _.rearg(function(a, b, c) {
 *   return [a, b, c];
 * }, [2, 0, 1]);
 *
 * rearged('b', 'c', 'a')
 * // => ['a', 'b', 'c']
 */
var rearg = _flatRest(function(func, indexes) {
  return _createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
});

var rearg_1 = rearg;

/**
 * Converts `value` to a property path array.
 *
 * @static
 * @memberOf _
 * @since 4.0.0
 * @category Util
 * @param {*} value The value to convert.
 * @returns {Array} Returns the new property path array.
 * @example
 *
 * _.toPath('a.b.c');
 * // => ['a', 'b', 'c']
 *
 * _.toPath('a[0].b.c');
 * // => ['a', '0', 'b', 'c']
 */
function toPath(value) {
  if (isArray_1(value)) {
    return _arrayMap(value, _toKey);
  }
  return isSymbol_1(value) ? [value] : _copyArray(_stringToPath(toString_1(value)));
}

var toPath_1 = toPath;

var _util = {
  'ary': ary_1,
  'assign': _baseAssign,
  'clone': clone_1,
  'curry': commonjsRequire("../curry", "/$$rollup_base$$/node_modules/lodash/fp"),
  'forEach': _arrayEach,
  'isArray': isArray_1,
  'isError': isError_1,
  'isFunction': isFunction_1,
  'isWeakMap': isWeakMap_1,
  'iteratee': iteratee_1,
  'keys': _baseKeys,
  'rearg': rearg_1,
  'toInteger': toInteger_1,
  'toPath': toPath_1
};

/**
 * Converts `func` of `name` to an immutable auto-curried iteratee-first data-last
 * version with conversion `options` applied. If `name` is an object its methods
 * will be converted.
 *
 * @param {string} name The name of the function to wrap.
 * @param {Function} [func] The function to wrap.
 * @param {Object} [options] The options object. See `baseConvert` for more details.
 * @returns {Function|Object} Returns the converted function or object.
 */
function convert$2(name, func, options) {
  return _baseConvert(_util, name, func, options);
}

var convert_1 = convert$2;

commonjsRegister("/$$rollup_base$$/node_modules/lodash/fp/curry.js", function (module, exports) {
  var convert = convert_1,
    func = convert('curry', commonjsRequire("../curry", "/$$rollup_base$$/node_modules/lodash/fp"));

func.placeholder = placeholder;
module.exports = func;

});

commonjsRegister("/$$rollup_base$$/node_modules/lodash/fp/curryN.js", function (module, exports) {
  var convert = convert_1,
    func = convert('curryN', commonjsRequire("../curry", "/$$rollup_base$$/node_modules/lodash/fp"));

func.placeholder = placeholder;
module.exports = func;

});

commonjsRegister("/$$rollup_base$$/node_modules/lodash/fp/curryRight.js", function (module, exports) {
  var convert = convert_1,
    func = convert('curryRight', commonjsRequire("../curryRight", "/$$rollup_base$$/node_modules/lodash/fp"));

func.placeholder = placeholder;
module.exports = func;

});

commonjsRegister("/$$rollup_base$$/node_modules/lodash/fp/curryRightN.js", function (module, exports) {
  var convert = convert_1,
    func = convert('curryRightN', commonjsRequire("../curryRight", "/$$rollup_base$$/node_modules/lodash/fp"));

func.placeholder = placeholder;
module.exports = func;

});

var moment = createCommonjsModule(function (module, exports) {
(function (global, factory) {
    module.exports = factory() ;
}(commonjsGlobal, (function () {
    var hookCallback;

    function hooks() {
        return hookCallback.apply(null, arguments);
    }

    // This is done to register the method called with moment()
    // without creating circular dependencies.
    function setHookCallback(callback) {
        hookCallback = callback;
    }

    function isArray(input) {
        return (
            input instanceof Array ||
            Object.prototype.toString.call(input) === '[object Array]'
        );
    }

    function isObject(input) {
        // IE8 will treat undefined and null as object if it wasn't for
        // input != null
        return (
            input != null &&
            Object.prototype.toString.call(input) === '[object Object]'
        );
    }

    function hasOwnProp(a, b) {
        return Object.prototype.hasOwnProperty.call(a, b);
    }

    function isObjectEmpty(obj) {
        if (Object.getOwnPropertyNames) {
            return Object.getOwnPropertyNames(obj).length === 0;
        } else {
            var k;
            for (k in obj) {
                if (hasOwnProp(obj, k)) {
                    return false;
                }
            }
            return true;
        }
    }

    function isUndefined(input) {
        return input === void 0;
    }

    function isNumber(input) {
        return (
            typeof input === 'number' ||
            Object.prototype.toString.call(input) === '[object Number]'
        );
    }

    function isDate(input) {
        return (
            input instanceof Date ||
            Object.prototype.toString.call(input) === '[object Date]'
        );
    }

    function map(arr, fn) {
        var res = [],
            i;
        for (i = 0; i < arr.length; ++i) {
            res.push(fn(arr[i], i));
        }
        return res;
    }

    function extend(a, b) {
        for (var i in b) {
            if (hasOwnProp(b, i)) {
                a[i] = b[i];
            }
        }

        if (hasOwnProp(b, 'toString')) {
            a.toString = b.toString;
        }

        if (hasOwnProp(b, 'valueOf')) {
            a.valueOf = b.valueOf;
        }

        return a;
    }

    function createUTC(input, format, locale, strict) {
        return createLocalOrUTC(input, format, locale, strict, true).utc();
    }

    function defaultParsingFlags() {
        // We need to deep clone this object.
        return {
            empty: false,
            unusedTokens: [],
            unusedInput: [],
            overflow: -2,
            charsLeftOver: 0,
            nullInput: false,
            invalidEra: null,
            invalidMonth: null,
            invalidFormat: false,
            userInvalidated: false,
            iso: false,
            parsedDateParts: [],
            era: null,
            meridiem: null,
            rfc2822: false,
            weekdayMismatch: false,
        };
    }

    function getParsingFlags(m) {
        if (m._pf == null) {
            m._pf = defaultParsingFlags();
        }
        return m._pf;
    }

    var some;
    if (Array.prototype.some) {
        some = Array.prototype.some;
    } else {
        some = function (fun) {
            var t = Object(this),
                len = t.length >>> 0,
                i;

            for (i = 0; i < len; i++) {
                if (i in t && fun.call(this, t[i], i, t)) {
                    return true;
                }
            }

            return false;
        };
    }

    function isValid(m) {
        if (m._isValid == null) {
            var flags = getParsingFlags(m),
                parsedParts = some.call(flags.parsedDateParts, function (i) {
                    return i != null;
                }),
                isNowValid =
                    !isNaN(m._d.getTime()) &&
                    flags.overflow < 0 &&
                    !flags.empty &&
                    !flags.invalidEra &&
                    !flags.invalidMonth &&
                    !flags.invalidWeekday &&
                    !flags.weekdayMismatch &&
                    !flags.nullInput &&
                    !flags.invalidFormat &&
                    !flags.userInvalidated &&
                    (!flags.meridiem || (flags.meridiem && parsedParts));

            if (m._strict) {
                isNowValid =
                    isNowValid &&
                    flags.charsLeftOver === 0 &&
                    flags.unusedTokens.length === 0 &&
                    flags.bigHour === undefined;
            }

            if (Object.isFrozen == null || !Object.isFrozen(m)) {
                m._isValid = isNowValid;
            } else {
                return isNowValid;
            }
        }
        return m._isValid;
    }

    function createInvalid(flags) {
        var m = createUTC(NaN);
        if (flags != null) {
            extend(getParsingFlags(m), flags);
        } else {
            getParsingFlags(m).userInvalidated = true;
        }

        return m;
    }

    // Plugins that add properties should also add the key here (null value),
    // so we can properly clone ourselves.
    var momentProperties = (hooks.momentProperties = []),
        updateInProgress = false;

    function copyConfig(to, from) {
        var i, prop, val;

        if (!isUndefined(from._isAMomentObject)) {
            to._isAMomentObject = from._isAMomentObject;
        }
        if (!isUndefined(from._i)) {
            to._i = from._i;
        }
        if (!isUndefined(from._f)) {
            to._f = from._f;
        }
        if (!isUndefined(from._l)) {
            to._l = from._l;
        }
        if (!isUndefined(from._strict)) {
            to._strict = from._strict;
        }
        if (!isUndefined(from._tzm)) {
            to._tzm = from._tzm;
        }
        if (!isUndefined(from._isUTC)) {
            to._isUTC = from._isUTC;
        }
        if (!isUndefined(from._offset)) {
            to._offset = from._offset;
        }
        if (!isUndefined(from._pf)) {
            to._pf = getParsingFlags(from);
        }
        if (!isUndefined(from._locale)) {
            to._locale = from._locale;
        }

        if (momentProperties.length > 0) {
            for (i = 0; i < momentProperties.length; i++) {
                prop = momentProperties[i];
                val = from[prop];
                if (!isUndefined(val)) {
                    to[prop] = val;
                }
            }
        }

        return to;
    }

    // Moment prototype object
    function Moment(config) {
        copyConfig(this, config);
        this._d = new Date(config._d != null ? config._d.getTime() : NaN);
        if (!this.isValid()) {
            this._d = new Date(NaN);
        }
        // Prevent infinite loop in case updateOffset creates new moment
        // objects.
        if (updateInProgress === false) {
            updateInProgress = true;
            hooks.updateOffset(this);
            updateInProgress = false;
        }
    }

    function isMoment(obj) {
        return (
            obj instanceof Moment || (obj != null && obj._isAMomentObject != null)
        );
    }

    function warn(msg) {
        if (
            hooks.suppressDeprecationWarnings === false &&
            typeof console !== 'undefined' &&
            console.warn
        ) {
            console.warn('Deprecation warning: ' + msg);
        }
    }

    function deprecate(msg, fn) {
        var firstTime = true;

        return extend(function () {
            if (hooks.deprecationHandler != null) {
                hooks.deprecationHandler(null, msg);
            }
            if (firstTime) {
                var args = [],
                    arg,
                    i,
                    key;
                for (i = 0; i < arguments.length; i++) {
                    arg = '';
                    if (typeof arguments[i] === 'object') {
                        arg += '\n[' + i + '] ';
                        for (key in arguments[0]) {
                            if (hasOwnProp(arguments[0], key)) {
                                arg += key + ': ' + arguments[0][key] + ', ';
                            }
                        }
                        arg = arg.slice(0, -2); // Remove trailing comma and space
                    } else {
                        arg = arguments[i];
                    }
                    args.push(arg);
                }
                warn(
                    msg +
                        '\nArguments: ' +
                        Array.prototype.slice.call(args).join('') +
                        '\n' +
                        new Error().stack
                );
                firstTime = false;
            }
            return fn.apply(this, arguments);
        }, fn);
    }

    var deprecations = {};

    function deprecateSimple(name, msg) {
        if (hooks.deprecationHandler != null) {
            hooks.deprecationHandler(name, msg);
        }
        if (!deprecations[name]) {
            warn(msg);
            deprecations[name] = true;
        }
    }

    hooks.suppressDeprecationWarnings = false;
    hooks.deprecationHandler = null;

    function isFunction(input) {
        return (
            (typeof Function !== 'undefined' && input instanceof Function) ||
            Object.prototype.toString.call(input) === '[object Function]'
        );
    }

    function set(config) {
        var prop, i;
        for (i in config) {
            if (hasOwnProp(config, i)) {
                prop = config[i];
                if (isFunction(prop)) {
                    this[i] = prop;
                } else {
                    this['_' + i] = prop;
                }
            }
        }
        this._config = config;
        // Lenient ordinal parsing accepts just a number in addition to
        // number + (possibly) stuff coming from _dayOfMonthOrdinalParse.
        // TODO: Remove "ordinalParse" fallback in next major release.
        this._dayOfMonthOrdinalParseLenient = new RegExp(
            (this._dayOfMonthOrdinalParse.source || this._ordinalParse.source) +
                '|' +
                /\d{1,2}/.source
        );
    }

    function mergeConfigs(parentConfig, childConfig) {
        var res = extend({}, parentConfig),
            prop;
        for (prop in childConfig) {
            if (hasOwnProp(childConfig, prop)) {
                if (isObject(parentConfig[prop]) && isObject(childConfig[prop])) {
                    res[prop] = {};
                    extend(res[prop], parentConfig[prop]);
                    extend(res[prop], childConfig[prop]);
                } else if (childConfig[prop] != null) {
                    res[prop] = childConfig[prop];
                } else {
                    delete res[prop];
                }
            }
        }
        for (prop in parentConfig) {
            if (
                hasOwnProp(parentConfig, prop) &&
                !hasOwnProp(childConfig, prop) &&
                isObject(parentConfig[prop])
            ) {
                // make sure changes to properties don't modify parent config
                res[prop] = extend({}, res[prop]);
            }
        }
        return res;
    }

    function Locale(config) {
        if (config != null) {
            this.set(config);
        }
    }

    var keys;

    if (Object.keys) {
        keys = Object.keys;
    } else {
        keys = function (obj) {
            var i,
                res = [];
            for (i in obj) {
                if (hasOwnProp(obj, i)) {
                    res.push(i);
                }
            }
            return res;
        };
    }

    var defaultCalendar = {
        sameDay: '[Today at] LT',
        nextDay: '[Tomorrow at] LT',
        nextWeek: 'dddd [at] LT',
        lastDay: '[Yesterday at] LT',
        lastWeek: '[Last] dddd [at] LT',
        sameElse: 'L',
    };

    function calendar(key, mom, now) {
        var output = this._calendar[key] || this._calendar['sameElse'];
        return isFunction(output) ? output.call(mom, now) : output;
    }

    function zeroFill(number, targetLength, forceSign) {
        var absNumber = '' + Math.abs(number),
            zerosToFill = targetLength - absNumber.length,
            sign = number >= 0;
        return (
            (sign ? (forceSign ? '+' : '') : '-') +
            Math.pow(10, Math.max(0, zerosToFill)).toString().substr(1) +
            absNumber
        );
    }

    var formattingTokens = /(\[[^\[]*\])|(\\)?([Hh]mm(ss)?|Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|Qo?|N{1,5}|YYYYYY|YYYYY|YYYY|YY|y{2,4}|yo?|gg(ggg?)?|GG(GGG?)?|e|E|a|A|hh?|HH?|kk?|mm?|ss?|S{1,9}|x|X|zz?|ZZ?|.)/g,
        localFormattingTokens = /(\[[^\[]*\])|(\\)?(LTS|LT|LL?L?L?|l{1,4})/g,
        formatFunctions = {},
        formatTokenFunctions = {};

    // token:    'M'
    // padded:   ['MM', 2]
    // ordinal:  'Mo'
    // callback: function () { this.month() + 1 }
    function addFormatToken(token, padded, ordinal, callback) {
        var func = callback;
        if (typeof callback === 'string') {
            func = function () {
                return this[callback]();
            };
        }
        if (token) {
            formatTokenFunctions[token] = func;
        }
        if (padded) {
            formatTokenFunctions[padded[0]] = function () {
                return zeroFill(func.apply(this, arguments), padded[1], padded[2]);
            };
        }
        if (ordinal) {
            formatTokenFunctions[ordinal] = function () {
                return this.localeData().ordinal(
                    func.apply(this, arguments),
                    token
                );
            };
        }
    }

    function removeFormattingTokens(input) {
        if (input.match(/\[[\s\S]/)) {
            return input.replace(/^\[|\]$/g, '');
        }
        return input.replace(/\\/g, '');
    }

    function makeFormatFunction(format) {
        var array = format.match(formattingTokens),
            i,
            length;

        for (i = 0, length = array.length; i < length; i++) {
            if (formatTokenFunctions[array[i]]) {
                array[i] = formatTokenFunctions[array[i]];
            } else {
                array[i] = removeFormattingTokens(array[i]);
            }
        }

        return function (mom) {
            var output = '',
                i;
            for (i = 0; i < length; i++) {
                output += isFunction(array[i])
                    ? array[i].call(mom, format)
                    : array[i];
            }
            return output;
        };
    }

    // format date using native date object
    function formatMoment(m, format) {
        if (!m.isValid()) {
            return m.localeData().invalidDate();
        }

        format = expandFormat(format, m.localeData());
        formatFunctions[format] =
            formatFunctions[format] || makeFormatFunction(format);

        return formatFunctions[format](m);
    }

    function expandFormat(format, locale) {
        var i = 5;

        function replaceLongDateFormatTokens(input) {
            return locale.longDateFormat(input) || input;
        }

        localFormattingTokens.lastIndex = 0;
        while (i >= 0 && localFormattingTokens.test(format)) {
            format = format.replace(
                localFormattingTokens,
                replaceLongDateFormatTokens
            );
            localFormattingTokens.lastIndex = 0;
            i -= 1;
        }

        return format;
    }

    var defaultLongDateFormat = {
        LTS: 'h:mm:ss A',
        LT: 'h:mm A',
        L: 'MM/DD/YYYY',
        LL: 'MMMM D, YYYY',
        LLL: 'MMMM D, YYYY h:mm A',
        LLLL: 'dddd, MMMM D, YYYY h:mm A',
    };

    function longDateFormat(key) {
        var format = this._longDateFormat[key],
            formatUpper = this._longDateFormat[key.toUpperCase()];

        if (format || !formatUpper) {
            return format;
        }

        this._longDateFormat[key] = formatUpper
            .match(formattingTokens)
            .map(function (tok) {
                if (
                    tok === 'MMMM' ||
                    tok === 'MM' ||
                    tok === 'DD' ||
                    tok === 'dddd'
                ) {
                    return tok.slice(1);
                }
                return tok;
            })
            .join('');

        return this._longDateFormat[key];
    }

    var defaultInvalidDate = 'Invalid date';

    function invalidDate() {
        return this._invalidDate;
    }

    var defaultOrdinal = '%d',
        defaultDayOfMonthOrdinalParse = /\d{1,2}/;

    function ordinal(number) {
        return this._ordinal.replace('%d', number);
    }

    var defaultRelativeTime = {
        future: 'in %s',
        past: '%s ago',
        s: 'a few seconds',
        ss: '%d seconds',
        m: 'a minute',
        mm: '%d minutes',
        h: 'an hour',
        hh: '%d hours',
        d: 'a day',
        dd: '%d days',
        w: 'a week',
        ww: '%d weeks',
        M: 'a month',
        MM: '%d months',
        y: 'a year',
        yy: '%d years',
    };

    function relativeTime(number, withoutSuffix, string, isFuture) {
        var output = this._relativeTime[string];
        return isFunction(output)
            ? output(number, withoutSuffix, string, isFuture)
            : output.replace(/%d/i, number);
    }

    function pastFuture(diff, output) {
        var format = this._relativeTime[diff > 0 ? 'future' : 'past'];
        return isFunction(format) ? format(output) : format.replace(/%s/i, output);
    }

    var aliases = {};

    function addUnitAlias(unit, shorthand) {
        var lowerCase = unit.toLowerCase();
        aliases[lowerCase] = aliases[lowerCase + 's'] = aliases[shorthand] = unit;
    }

    function normalizeUnits(units) {
        return typeof units === 'string'
            ? aliases[units] || aliases[units.toLowerCase()]
            : undefined;
    }

    function normalizeObjectUnits(inputObject) {
        var normalizedInput = {},
            normalizedProp,
            prop;

        for (prop in inputObject) {
            if (hasOwnProp(inputObject, prop)) {
                normalizedProp = normalizeUnits(prop);
                if (normalizedProp) {
                    normalizedInput[normalizedProp] = inputObject[prop];
                }
            }
        }

        return normalizedInput;
    }

    var priorities = {};

    function addUnitPriority(unit, priority) {
        priorities[unit] = priority;
    }

    function getPrioritizedUnits(unitsObj) {
        var units = [],
            u;
        for (u in unitsObj) {
            if (hasOwnProp(unitsObj, u)) {
                units.push({ unit: u, priority: priorities[u] });
            }
        }
        units.sort(function (a, b) {
            return a.priority - b.priority;
        });
        return units;
    }

    function isLeapYear(year) {
        return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
    }

    function absFloor(number) {
        if (number < 0) {
            // -0 -> 0
            return Math.ceil(number) || 0;
        } else {
            return Math.floor(number);
        }
    }

    function toInt(argumentForCoercion) {
        var coercedNumber = +argumentForCoercion,
            value = 0;

        if (coercedNumber !== 0 && isFinite(coercedNumber)) {
            value = absFloor(coercedNumber);
        }

        return value;
    }

    function makeGetSet(unit, keepTime) {
        return function (value) {
            if (value != null) {
                set$1(this, unit, value);
                hooks.updateOffset(this, keepTime);
                return this;
            } else {
                return get(this, unit);
            }
        };
    }

    function get(mom, unit) {
        return mom.isValid()
            ? mom._d['get' + (mom._isUTC ? 'UTC' : '') + unit]()
            : NaN;
    }

    function set$1(mom, unit, value) {
        if (mom.isValid() && !isNaN(value)) {
            if (
                unit === 'FullYear' &&
                isLeapYear(mom.year()) &&
                mom.month() === 1 &&
                mom.date() === 29
            ) {
                value = toInt(value);
                mom._d['set' + (mom._isUTC ? 'UTC' : '') + unit](
                    value,
                    mom.month(),
                    daysInMonth(value, mom.month())
                );
            } else {
                mom._d['set' + (mom._isUTC ? 'UTC' : '') + unit](value);
            }
        }
    }

    // MOMENTS

    function stringGet(units) {
        units = normalizeUnits(units);
        if (isFunction(this[units])) {
            return this[units]();
        }
        return this;
    }

    function stringSet(units, value) {
        if (typeof units === 'object') {
            units = normalizeObjectUnits(units);
            var prioritized = getPrioritizedUnits(units),
                i;
            for (i = 0; i < prioritized.length; i++) {
                this[prioritized[i].unit](units[prioritized[i].unit]);
            }
        } else {
            units = normalizeUnits(units);
            if (isFunction(this[units])) {
                return this[units](value);
            }
        }
        return this;
    }

    var match1 = /\d/, //       0 - 9
        match2 = /\d\d/, //      00 - 99
        match3 = /\d{3}/, //     000 - 999
        match4 = /\d{4}/, //    0000 - 9999
        match6 = /[+-]?\d{6}/, // -999999 - 999999
        match1to2 = /\d\d?/, //       0 - 99
        match3to4 = /\d\d\d\d?/, //     999 - 9999
        match5to6 = /\d\d\d\d\d\d?/, //   99999 - 999999
        match1to3 = /\d{1,3}/, //       0 - 999
        match1to4 = /\d{1,4}/, //       0 - 9999
        match1to6 = /[+-]?\d{1,6}/, // -999999 - 999999
        matchUnsigned = /\d+/, //       0 - inf
        matchSigned = /[+-]?\d+/, //    -inf - inf
        matchOffset = /Z|[+-]\d\d:?\d\d/gi, // +00:00 -00:00 +0000 -0000 or Z
        matchShortOffset = /Z|[+-]\d\d(?::?\d\d)?/gi, // +00 -00 +00:00 -00:00 +0000 -0000 or Z
        matchTimestamp = /[+-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123
        // any word (or two) characters or numbers including two/three word month in arabic.
        // includes scottish gaelic two word and hyphenated months
        matchWord = /[0-9]{0,256}['a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFF07\uFF10-\uFFEF]{1,256}|[\u0600-\u06FF\/]{1,256}(\s*?[\u0600-\u06FF]{1,256}){1,2}/i,
        regexes;

    regexes = {};

    function addRegexToken(token, regex, strictRegex) {
        regexes[token] = isFunction(regex)
            ? regex
            : function (isStrict, localeData) {
                  return isStrict && strictRegex ? strictRegex : regex;
              };
    }

    function getParseRegexForToken(token, config) {
        if (!hasOwnProp(regexes, token)) {
            return new RegExp(unescapeFormat(token));
        }

        return regexes[token](config._strict, config._locale);
    }

    // Code from http://stackoverflow.com/questions/3561493/is-there-a-regexp-escape-function-in-javascript
    function unescapeFormat(s) {
        return regexEscape(
            s
                .replace('\\', '')
                .replace(/\\(\[)|\\(\])|\[([^\]\[]*)\]|\\(.)/g, function (
                    matched,
                    p1,
                    p2,
                    p3,
                    p4
                ) {
                    return p1 || p2 || p3 || p4;
                })
        );
    }

    function regexEscape(s) {
        return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
    }

    var tokens = {};

    function addParseToken(token, callback) {
        var i,
            func = callback;
        if (typeof token === 'string') {
            token = [token];
        }
        if (isNumber(callback)) {
            func = function (input, array) {
                array[callback] = toInt(input);
            };
        }
        for (i = 0; i < token.length; i++) {
            tokens[token[i]] = func;
        }
    }

    function addWeekParseToken(token, callback) {
        addParseToken(token, function (input, array, config, token) {
            config._w = config._w || {};
            callback(input, config._w, config, token);
        });
    }

    function addTimeToArrayFromToken(token, input, config) {
        if (input != null && hasOwnProp(tokens, token)) {
            tokens[token](input, config._a, config, token);
        }
    }

    var YEAR = 0,
        MONTH = 1,
        DATE = 2,
        HOUR = 3,
        MINUTE = 4,
        SECOND = 5,
        MILLISECOND = 6,
        WEEK = 7,
        WEEKDAY = 8;

    function mod(n, x) {
        return ((n % x) + x) % x;
    }

    var indexOf;

    if (Array.prototype.indexOf) {
        indexOf = Array.prototype.indexOf;
    } else {
        indexOf = function (o) {
            // I know
            var i;
            for (i = 0; i < this.length; ++i) {
                if (this[i] === o) {
                    return i;
                }
            }
            return -1;
        };
    }

    function daysInMonth(year, month) {
        if (isNaN(year) || isNaN(month)) {
            return NaN;
        }
        var modMonth = mod(month, 12);
        year += (month - modMonth) / 12;
        return modMonth === 1
            ? isLeapYear(year)
                ? 29
                : 28
            : 31 - ((modMonth % 7) % 2);
    }

    // FORMATTING

    addFormatToken('M', ['MM', 2], 'Mo', function () {
        return this.month() + 1;
    });

    addFormatToken('MMM', 0, 0, function (format) {
        return this.localeData().monthsShort(this, format);
    });

    addFormatToken('MMMM', 0, 0, function (format) {
        return this.localeData().months(this, format);
    });

    // ALIASES

    addUnitAlias('month', 'M');

    // PRIORITY

    addUnitPriority('month', 8);

    // PARSING

    addRegexToken('M', match1to2);
    addRegexToken('MM', match1to2, match2);
    addRegexToken('MMM', function (isStrict, locale) {
        return locale.monthsShortRegex(isStrict);
    });
    addRegexToken('MMMM', function (isStrict, locale) {
        return locale.monthsRegex(isStrict);
    });

    addParseToken(['M', 'MM'], function (input, array) {
        array[MONTH] = toInt(input) - 1;
    });

    addParseToken(['MMM', 'MMMM'], function (input, array, config, token) {
        var month = config._locale.monthsParse(input, token, config._strict);
        // if we didn't find a month name, mark the date as invalid.
        if (month != null) {
            array[MONTH] = month;
        } else {
            getParsingFlags(config).invalidMonth = input;
        }
    });

    // LOCALES

    var defaultLocaleMonths = 'January_February_March_April_May_June_July_August_September_October_November_December'.split(
            '_'
        ),
        defaultLocaleMonthsShort = 'Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec'.split(
            '_'
        ),
        MONTHS_IN_FORMAT = /D[oD]?(\[[^\[\]]*\]|\s)+MMMM?/,
        defaultMonthsShortRegex = matchWord,
        defaultMonthsRegex = matchWord;

    function localeMonths(m, format) {
        if (!m) {
            return isArray(this._months)
                ? this._months
                : this._months['standalone'];
        }
        return isArray(this._months)
            ? this._months[m.month()]
            : this._months[
                  (this._months.isFormat || MONTHS_IN_FORMAT).test(format)
                      ? 'format'
                      : 'standalone'
              ][m.month()];
    }

    function localeMonthsShort(m, format) {
        if (!m) {
            return isArray(this._monthsShort)
                ? this._monthsShort
                : this._monthsShort['standalone'];
        }
        return isArray(this._monthsShort)
            ? this._monthsShort[m.month()]
            : this._monthsShort[
                  MONTHS_IN_FORMAT.test(format) ? 'format' : 'standalone'
              ][m.month()];
    }

    function handleStrictParse(monthName, format, strict) {
        var i,
            ii,
            mom,
            llc = monthName.toLocaleLowerCase();
        if (!this._monthsParse) {
            // this is not used
            this._monthsParse = [];
            this._longMonthsParse = [];
            this._shortMonthsParse = [];
            for (i = 0; i < 12; ++i) {
                mom = createUTC([2000, i]);
                this._shortMonthsParse[i] = this.monthsShort(
                    mom,
                    ''
                ).toLocaleLowerCase();
                this._longMonthsParse[i] = this.months(mom, '').toLocaleLowerCase();
            }
        }

        if (strict) {
            if (format === 'MMM') {
                ii = indexOf.call(this._shortMonthsParse, llc);
                return ii !== -1 ? ii : null;
            } else {
                ii = indexOf.call(this._longMonthsParse, llc);
                return ii !== -1 ? ii : null;
            }
        } else {
            if (format === 'MMM') {
                ii = indexOf.call(this._shortMonthsParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._longMonthsParse, llc);
                return ii !== -1 ? ii : null;
            } else {
                ii = indexOf.call(this._longMonthsParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._shortMonthsParse, llc);
                return ii !== -1 ? ii : null;
            }
        }
    }

    function localeMonthsParse(monthName, format, strict) {
        var i, mom, regex;

        if (this._monthsParseExact) {
            return handleStrictParse.call(this, monthName, format, strict);
        }

        if (!this._monthsParse) {
            this._monthsParse = [];
            this._longMonthsParse = [];
            this._shortMonthsParse = [];
        }

        // TODO: add sorting
        // Sorting makes sure if one month (or abbr) is a prefix of another
        // see sorting in computeMonthsParse
        for (i = 0; i < 12; i++) {
            // make the regex if we don't have it already
            mom = createUTC([2000, i]);
            if (strict && !this._longMonthsParse[i]) {
                this._longMonthsParse[i] = new RegExp(
                    '^' + this.months(mom, '').replace('.', '') + '$',
                    'i'
                );
                this._shortMonthsParse[i] = new RegExp(
                    '^' + this.monthsShort(mom, '').replace('.', '') + '$',
                    'i'
                );
            }
            if (!strict && !this._monthsParse[i]) {
                regex =
                    '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
                this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
            }
            // test the regex
            if (
                strict &&
                format === 'MMMM' &&
                this._longMonthsParse[i].test(monthName)
            ) {
                return i;
            } else if (
                strict &&
                format === 'MMM' &&
                this._shortMonthsParse[i].test(monthName)
            ) {
                return i;
            } else if (!strict && this._monthsParse[i].test(monthName)) {
                return i;
            }
        }
    }

    // MOMENTS

    function setMonth(mom, value) {
        var dayOfMonth;

        if (!mom.isValid()) {
            // No op
            return mom;
        }

        if (typeof value === 'string') {
            if (/^\d+$/.test(value)) {
                value = toInt(value);
            } else {
                value = mom.localeData().monthsParse(value);
                // TODO: Another silent failure?
                if (!isNumber(value)) {
                    return mom;
                }
            }
        }

        dayOfMonth = Math.min(mom.date(), daysInMonth(mom.year(), value));
        mom._d['set' + (mom._isUTC ? 'UTC' : '') + 'Month'](value, dayOfMonth);
        return mom;
    }

    function getSetMonth(value) {
        if (value != null) {
            setMonth(this, value);
            hooks.updateOffset(this, true);
            return this;
        } else {
            return get(this, 'Month');
        }
    }

    function getDaysInMonth() {
        return daysInMonth(this.year(), this.month());
    }

    function monthsShortRegex(isStrict) {
        if (this._monthsParseExact) {
            if (!hasOwnProp(this, '_monthsRegex')) {
                computeMonthsParse.call(this);
            }
            if (isStrict) {
                return this._monthsShortStrictRegex;
            } else {
                return this._monthsShortRegex;
            }
        } else {
            if (!hasOwnProp(this, '_monthsShortRegex')) {
                this._monthsShortRegex = defaultMonthsShortRegex;
            }
            return this._monthsShortStrictRegex && isStrict
                ? this._monthsShortStrictRegex
                : this._monthsShortRegex;
        }
    }

    function monthsRegex(isStrict) {
        if (this._monthsParseExact) {
            if (!hasOwnProp(this, '_monthsRegex')) {
                computeMonthsParse.call(this);
            }
            if (isStrict) {
                return this._monthsStrictRegex;
            } else {
                return this._monthsRegex;
            }
        } else {
            if (!hasOwnProp(this, '_monthsRegex')) {
                this._monthsRegex = defaultMonthsRegex;
            }
            return this._monthsStrictRegex && isStrict
                ? this._monthsStrictRegex
                : this._monthsRegex;
        }
    }

    function computeMonthsParse() {
        function cmpLenRev(a, b) {
            return b.length - a.length;
        }

        var shortPieces = [],
            longPieces = [],
            mixedPieces = [],
            i,
            mom;
        for (i = 0; i < 12; i++) {
            // make the regex if we don't have it already
            mom = createUTC([2000, i]);
            shortPieces.push(this.monthsShort(mom, ''));
            longPieces.push(this.months(mom, ''));
            mixedPieces.push(this.months(mom, ''));
            mixedPieces.push(this.monthsShort(mom, ''));
        }
        // Sorting makes sure if one month (or abbr) is a prefix of another it
        // will match the longer piece.
        shortPieces.sort(cmpLenRev);
        longPieces.sort(cmpLenRev);
        mixedPieces.sort(cmpLenRev);
        for (i = 0; i < 12; i++) {
            shortPieces[i] = regexEscape(shortPieces[i]);
            longPieces[i] = regexEscape(longPieces[i]);
        }
        for (i = 0; i < 24; i++) {
            mixedPieces[i] = regexEscape(mixedPieces[i]);
        }

        this._monthsRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
        this._monthsShortRegex = this._monthsRegex;
        this._monthsStrictRegex = new RegExp(
            '^(' + longPieces.join('|') + ')',
            'i'
        );
        this._monthsShortStrictRegex = new RegExp(
            '^(' + shortPieces.join('|') + ')',
            'i'
        );
    }

    // FORMATTING

    addFormatToken('Y', 0, 0, function () {
        var y = this.year();
        return y <= 9999 ? zeroFill(y, 4) : '+' + y;
    });

    addFormatToken(0, ['YY', 2], 0, function () {
        return this.year() % 100;
    });

    addFormatToken(0, ['YYYY', 4], 0, 'year');
    addFormatToken(0, ['YYYYY', 5], 0, 'year');
    addFormatToken(0, ['YYYYYY', 6, true], 0, 'year');

    // ALIASES

    addUnitAlias('year', 'y');

    // PRIORITIES

    addUnitPriority('year', 1);

    // PARSING

    addRegexToken('Y', matchSigned);
    addRegexToken('YY', match1to2, match2);
    addRegexToken('YYYY', match1to4, match4);
    addRegexToken('YYYYY', match1to6, match6);
    addRegexToken('YYYYYY', match1to6, match6);

    addParseToken(['YYYYY', 'YYYYYY'], YEAR);
    addParseToken('YYYY', function (input, array) {
        array[YEAR] =
            input.length === 2 ? hooks.parseTwoDigitYear(input) : toInt(input);
    });
    addParseToken('YY', function (input, array) {
        array[YEAR] = hooks.parseTwoDigitYear(input);
    });
    addParseToken('Y', function (input, array) {
        array[YEAR] = parseInt(input, 10);
    });

    // HELPERS

    function daysInYear(year) {
        return isLeapYear(year) ? 366 : 365;
    }

    // HOOKS

    hooks.parseTwoDigitYear = function (input) {
        return toInt(input) + (toInt(input) > 68 ? 1900 : 2000);
    };

    // MOMENTS

    var getSetYear = makeGetSet('FullYear', true);

    function getIsLeapYear() {
        return isLeapYear(this.year());
    }

    function createDate(y, m, d, h, M, s, ms) {
        // can't just apply() to create a date:
        // https://stackoverflow.com/q/181348
        var date;
        // the date constructor remaps years 0-99 to 1900-1999
        if (y < 100 && y >= 0) {
            // preserve leap years using a full 400 year cycle, then reset
            date = new Date(y + 400, m, d, h, M, s, ms);
            if (isFinite(date.getFullYear())) {
                date.setFullYear(y);
            }
        } else {
            date = new Date(y, m, d, h, M, s, ms);
        }

        return date;
    }

    function createUTCDate(y) {
        var date, args;
        // the Date.UTC function remaps years 0-99 to 1900-1999
        if (y < 100 && y >= 0) {
            args = Array.prototype.slice.call(arguments);
            // preserve leap years using a full 400 year cycle, then reset
            args[0] = y + 400;
            date = new Date(Date.UTC.apply(null, args));
            if (isFinite(date.getUTCFullYear())) {
                date.setUTCFullYear(y);
            }
        } else {
            date = new Date(Date.UTC.apply(null, arguments));
        }

        return date;
    }

    // start-of-first-week - start-of-year
    function firstWeekOffset(year, dow, doy) {
        var // first-week day -- which january is always in the first week (4 for iso, 1 for other)
            fwd = 7 + dow - doy,
            // first-week day local weekday -- which local weekday is fwd
            fwdlw = (7 + createUTCDate(year, 0, fwd).getUTCDay() - dow) % 7;

        return -fwdlw + fwd - 1;
    }

    // https://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
    function dayOfYearFromWeeks(year, week, weekday, dow, doy) {
        var localWeekday = (7 + weekday - dow) % 7,
            weekOffset = firstWeekOffset(year, dow, doy),
            dayOfYear = 1 + 7 * (week - 1) + localWeekday + weekOffset,
            resYear,
            resDayOfYear;

        if (dayOfYear <= 0) {
            resYear = year - 1;
            resDayOfYear = daysInYear(resYear) + dayOfYear;
        } else if (dayOfYear > daysInYear(year)) {
            resYear = year + 1;
            resDayOfYear = dayOfYear - daysInYear(year);
        } else {
            resYear = year;
            resDayOfYear = dayOfYear;
        }

        return {
            year: resYear,
            dayOfYear: resDayOfYear,
        };
    }

    function weekOfYear(mom, dow, doy) {
        var weekOffset = firstWeekOffset(mom.year(), dow, doy),
            week = Math.floor((mom.dayOfYear() - weekOffset - 1) / 7) + 1,
            resWeek,
            resYear;

        if (week < 1) {
            resYear = mom.year() - 1;
            resWeek = week + weeksInYear(resYear, dow, doy);
        } else if (week > weeksInYear(mom.year(), dow, doy)) {
            resWeek = week - weeksInYear(mom.year(), dow, doy);
            resYear = mom.year() + 1;
        } else {
            resYear = mom.year();
            resWeek = week;
        }

        return {
            week: resWeek,
            year: resYear,
        };
    }

    function weeksInYear(year, dow, doy) {
        var weekOffset = firstWeekOffset(year, dow, doy),
            weekOffsetNext = firstWeekOffset(year + 1, dow, doy);
        return (daysInYear(year) - weekOffset + weekOffsetNext) / 7;
    }

    // FORMATTING

    addFormatToken('w', ['ww', 2], 'wo', 'week');
    addFormatToken('W', ['WW', 2], 'Wo', 'isoWeek');

    // ALIASES

    addUnitAlias('week', 'w');
    addUnitAlias('isoWeek', 'W');

    // PRIORITIES

    addUnitPriority('week', 5);
    addUnitPriority('isoWeek', 5);

    // PARSING

    addRegexToken('w', match1to2);
    addRegexToken('ww', match1to2, match2);
    addRegexToken('W', match1to2);
    addRegexToken('WW', match1to2, match2);

    addWeekParseToken(['w', 'ww', 'W', 'WW'], function (
        input,
        week,
        config,
        token
    ) {
        week[token.substr(0, 1)] = toInt(input);
    });

    // HELPERS

    // LOCALES

    function localeWeek(mom) {
        return weekOfYear(mom, this._week.dow, this._week.doy).week;
    }

    var defaultLocaleWeek = {
        dow: 0, // Sunday is the first day of the week.
        doy: 6, // The week that contains Jan 6th is the first week of the year.
    };

    function localeFirstDayOfWeek() {
        return this._week.dow;
    }

    function localeFirstDayOfYear() {
        return this._week.doy;
    }

    // MOMENTS

    function getSetWeek(input) {
        var week = this.localeData().week(this);
        return input == null ? week : this.add((input - week) * 7, 'd');
    }

    function getSetISOWeek(input) {
        var week = weekOfYear(this, 1, 4).week;
        return input == null ? week : this.add((input - week) * 7, 'd');
    }

    // FORMATTING

    addFormatToken('d', 0, 'do', 'day');

    addFormatToken('dd', 0, 0, function (format) {
        return this.localeData().weekdaysMin(this, format);
    });

    addFormatToken('ddd', 0, 0, function (format) {
        return this.localeData().weekdaysShort(this, format);
    });

    addFormatToken('dddd', 0, 0, function (format) {
        return this.localeData().weekdays(this, format);
    });

    addFormatToken('e', 0, 0, 'weekday');
    addFormatToken('E', 0, 0, 'isoWeekday');

    // ALIASES

    addUnitAlias('day', 'd');
    addUnitAlias('weekday', 'e');
    addUnitAlias('isoWeekday', 'E');

    // PRIORITY
    addUnitPriority('day', 11);
    addUnitPriority('weekday', 11);
    addUnitPriority('isoWeekday', 11);

    // PARSING

    addRegexToken('d', match1to2);
    addRegexToken('e', match1to2);
    addRegexToken('E', match1to2);
    addRegexToken('dd', function (isStrict, locale) {
        return locale.weekdaysMinRegex(isStrict);
    });
    addRegexToken('ddd', function (isStrict, locale) {
        return locale.weekdaysShortRegex(isStrict);
    });
    addRegexToken('dddd', function (isStrict, locale) {
        return locale.weekdaysRegex(isStrict);
    });

    addWeekParseToken(['dd', 'ddd', 'dddd'], function (input, week, config, token) {
        var weekday = config._locale.weekdaysParse(input, token, config._strict);
        // if we didn't get a weekday name, mark the date as invalid
        if (weekday != null) {
            week.d = weekday;
        } else {
            getParsingFlags(config).invalidWeekday = input;
        }
    });

    addWeekParseToken(['d', 'e', 'E'], function (input, week, config, token) {
        week[token] = toInt(input);
    });

    // HELPERS

    function parseWeekday(input, locale) {
        if (typeof input !== 'string') {
            return input;
        }

        if (!isNaN(input)) {
            return parseInt(input, 10);
        }

        input = locale.weekdaysParse(input);
        if (typeof input === 'number') {
            return input;
        }

        return null;
    }

    function parseIsoWeekday(input, locale) {
        if (typeof input === 'string') {
            return locale.weekdaysParse(input) % 7 || 7;
        }
        return isNaN(input) ? null : input;
    }

    // LOCALES
    function shiftWeekdays(ws, n) {
        return ws.slice(n, 7).concat(ws.slice(0, n));
    }

    var defaultLocaleWeekdays = 'Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday'.split(
            '_'
        ),
        defaultLocaleWeekdaysShort = 'Sun_Mon_Tue_Wed_Thu_Fri_Sat'.split('_'),
        defaultLocaleWeekdaysMin = 'Su_Mo_Tu_We_Th_Fr_Sa'.split('_'),
        defaultWeekdaysRegex = matchWord,
        defaultWeekdaysShortRegex = matchWord,
        defaultWeekdaysMinRegex = matchWord;

    function localeWeekdays(m, format) {
        var weekdays = isArray(this._weekdays)
            ? this._weekdays
            : this._weekdays[
                  m && m !== true && this._weekdays.isFormat.test(format)
                      ? 'format'
                      : 'standalone'
              ];
        return m === true
            ? shiftWeekdays(weekdays, this._week.dow)
            : m
            ? weekdays[m.day()]
            : weekdays;
    }

    function localeWeekdaysShort(m) {
        return m === true
            ? shiftWeekdays(this._weekdaysShort, this._week.dow)
            : m
            ? this._weekdaysShort[m.day()]
            : this._weekdaysShort;
    }

    function localeWeekdaysMin(m) {
        return m === true
            ? shiftWeekdays(this._weekdaysMin, this._week.dow)
            : m
            ? this._weekdaysMin[m.day()]
            : this._weekdaysMin;
    }

    function handleStrictParse$1(weekdayName, format, strict) {
        var i,
            ii,
            mom,
            llc = weekdayName.toLocaleLowerCase();
        if (!this._weekdaysParse) {
            this._weekdaysParse = [];
            this._shortWeekdaysParse = [];
            this._minWeekdaysParse = [];

            for (i = 0; i < 7; ++i) {
                mom = createUTC([2000, 1]).day(i);
                this._minWeekdaysParse[i] = this.weekdaysMin(
                    mom,
                    ''
                ).toLocaleLowerCase();
                this._shortWeekdaysParse[i] = this.weekdaysShort(
                    mom,
                    ''
                ).toLocaleLowerCase();
                this._weekdaysParse[i] = this.weekdays(mom, '').toLocaleLowerCase();
            }
        }

        if (strict) {
            if (format === 'dddd') {
                ii = indexOf.call(this._weekdaysParse, llc);
                return ii !== -1 ? ii : null;
            } else if (format === 'ddd') {
                ii = indexOf.call(this._shortWeekdaysParse, llc);
                return ii !== -1 ? ii : null;
            } else {
                ii = indexOf.call(this._minWeekdaysParse, llc);
                return ii !== -1 ? ii : null;
            }
        } else {
            if (format === 'dddd') {
                ii = indexOf.call(this._weekdaysParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._shortWeekdaysParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._minWeekdaysParse, llc);
                return ii !== -1 ? ii : null;
            } else if (format === 'ddd') {
                ii = indexOf.call(this._shortWeekdaysParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._weekdaysParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._minWeekdaysParse, llc);
                return ii !== -1 ? ii : null;
            } else {
                ii = indexOf.call(this._minWeekdaysParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._weekdaysParse, llc);
                if (ii !== -1) {
                    return ii;
                }
                ii = indexOf.call(this._shortWeekdaysParse, llc);
                return ii !== -1 ? ii : null;
            }
        }
    }

    function localeWeekdaysParse(weekdayName, format, strict) {
        var i, mom, regex;

        if (this._weekdaysParseExact) {
            return handleStrictParse$1.call(this, weekdayName, format, strict);
        }

        if (!this._weekdaysParse) {
            this._weekdaysParse = [];
            this._minWeekdaysParse = [];
            this._shortWeekdaysParse = [];
            this._fullWeekdaysParse = [];
        }

        for (i = 0; i < 7; i++) {
            // make the regex if we don't have it already

            mom = createUTC([2000, 1]).day(i);
            if (strict && !this._fullWeekdaysParse[i]) {
                this._fullWeekdaysParse[i] = new RegExp(
                    '^' + this.weekdays(mom, '').replace('.', '\\.?') + '$',
                    'i'
                );
                this._shortWeekdaysParse[i] = new RegExp(
                    '^' + this.weekdaysShort(mom, '').replace('.', '\\.?') + '$',
                    'i'
                );
                this._minWeekdaysParse[i] = new RegExp(
                    '^' + this.weekdaysMin(mom, '').replace('.', '\\.?') + '$',
                    'i'
                );
            }
            if (!this._weekdaysParse[i]) {
                regex =
                    '^' +
                    this.weekdays(mom, '') +
                    '|^' +
                    this.weekdaysShort(mom, '') +
                    '|^' +
                    this.weekdaysMin(mom, '');
                this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
            }
            // test the regex
            if (
                strict &&
                format === 'dddd' &&
                this._fullWeekdaysParse[i].test(weekdayName)
            ) {
                return i;
            } else if (
                strict &&
                format === 'ddd' &&
                this._shortWeekdaysParse[i].test(weekdayName)
            ) {
                return i;
            } else if (
                strict &&
                format === 'dd' &&
                this._minWeekdaysParse[i].test(weekdayName)
            ) {
                return i;
            } else if (!strict && this._weekdaysParse[i].test(weekdayName)) {
                return i;
            }
        }
    }

    // MOMENTS

    function getSetDayOfWeek(input) {
        if (!this.isValid()) {
            return input != null ? this : NaN;
        }
        var day = this._isUTC ? this._d.getUTCDay() : this._d.getDay();
        if (input != null) {
            input = parseWeekday(input, this.localeData());
            return this.add(input - day, 'd');
        } else {
            return day;
        }
    }

    function getSetLocaleDayOfWeek(input) {
        if (!this.isValid()) {
            return input != null ? this : NaN;
        }
        var weekday = (this.day() + 7 - this.localeData()._week.dow) % 7;
        return input == null ? weekday : this.add(input - weekday, 'd');
    }

    function getSetISODayOfWeek(input) {
        if (!this.isValid()) {
            return input != null ? this : NaN;
        }

        // behaves the same as moment#day except
        // as a getter, returns 7 instead of 0 (1-7 range instead of 0-6)
        // as a setter, sunday should belong to the previous week.

        if (input != null) {
            var weekday = parseIsoWeekday(input, this.localeData());
            return this.day(this.day() % 7 ? weekday : weekday - 7);
        } else {
            return this.day() || 7;
        }
    }

    function weekdaysRegex(isStrict) {
        if (this._weekdaysParseExact) {
            if (!hasOwnProp(this, '_weekdaysRegex')) {
                computeWeekdaysParse.call(this);
            }
            if (isStrict) {
                return this._weekdaysStrictRegex;
            } else {
                return this._weekdaysRegex;
            }
        } else {
            if (!hasOwnProp(this, '_weekdaysRegex')) {
                this._weekdaysRegex = defaultWeekdaysRegex;
            }
            return this._weekdaysStrictRegex && isStrict
                ? this._weekdaysStrictRegex
                : this._weekdaysRegex;
        }
    }

    function weekdaysShortRegex(isStrict) {
        if (this._weekdaysParseExact) {
            if (!hasOwnProp(this, '_weekdaysRegex')) {
                computeWeekdaysParse.call(this);
            }
            if (isStrict) {
                return this._weekdaysShortStrictRegex;
            } else {
                return this._weekdaysShortRegex;
            }
        } else {
            if (!hasOwnProp(this, '_weekdaysShortRegex')) {
                this._weekdaysShortRegex = defaultWeekdaysShortRegex;
            }
            return this._weekdaysShortStrictRegex && isStrict
                ? this._weekdaysShortStrictRegex
                : this._weekdaysShortRegex;
        }
    }

    function weekdaysMinRegex(isStrict) {
        if (this._weekdaysParseExact) {
            if (!hasOwnProp(this, '_weekdaysRegex')) {
                computeWeekdaysParse.call(this);
            }
            if (isStrict) {
                return this._weekdaysMinStrictRegex;
            } else {
                return this._weekdaysMinRegex;
            }
        } else {
            if (!hasOwnProp(this, '_weekdaysMinRegex')) {
                this._weekdaysMinRegex = defaultWeekdaysMinRegex;
            }
            return this._weekdaysMinStrictRegex && isStrict
                ? this._weekdaysMinStrictRegex
                : this._weekdaysMinRegex;
        }
    }

    function computeWeekdaysParse() {
        function cmpLenRev(a, b) {
            return b.length - a.length;
        }

        var minPieces = [],
            shortPieces = [],
            longPieces = [],
            mixedPieces = [],
            i,
            mom,
            minp,
            shortp,
            longp;
        for (i = 0; i < 7; i++) {
            // make the regex if we don't have it already
            mom = createUTC([2000, 1]).day(i);
            minp = regexEscape(this.weekdaysMin(mom, ''));
            shortp = regexEscape(this.weekdaysShort(mom, ''));
            longp = regexEscape(this.weekdays(mom, ''));
            minPieces.push(minp);
            shortPieces.push(shortp);
            longPieces.push(longp);
            mixedPieces.push(minp);
            mixedPieces.push(shortp);
            mixedPieces.push(longp);
        }
        // Sorting makes sure if one weekday (or abbr) is a prefix of another it
        // will match the longer piece.
        minPieces.sort(cmpLenRev);
        shortPieces.sort(cmpLenRev);
        longPieces.sort(cmpLenRev);
        mixedPieces.sort(cmpLenRev);

        this._weekdaysRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
        this._weekdaysShortRegex = this._weekdaysRegex;
        this._weekdaysMinRegex = this._weekdaysRegex;

        this._weekdaysStrictRegex = new RegExp(
            '^(' + longPieces.join('|') + ')',
            'i'
        );
        this._weekdaysShortStrictRegex = new RegExp(
            '^(' + shortPieces.join('|') + ')',
            'i'
        );
        this._weekdaysMinStrictRegex = new RegExp(
            '^(' + minPieces.join('|') + ')',
            'i'
        );
    }

    // FORMATTING

    function hFormat() {
        return this.hours() % 12 || 12;
    }

    function kFormat() {
        return this.hours() || 24;
    }

    addFormatToken('H', ['HH', 2], 0, 'hour');
    addFormatToken('h', ['hh', 2], 0, hFormat);
    addFormatToken('k', ['kk', 2], 0, kFormat);

    addFormatToken('hmm', 0, 0, function () {
        return '' + hFormat.apply(this) + zeroFill(this.minutes(), 2);
    });

    addFormatToken('hmmss', 0, 0, function () {
        return (
            '' +
            hFormat.apply(this) +
            zeroFill(this.minutes(), 2) +
            zeroFill(this.seconds(), 2)
        );
    });

    addFormatToken('Hmm', 0, 0, function () {
        return '' + this.hours() + zeroFill(this.minutes(), 2);
    });

    addFormatToken('Hmmss', 0, 0, function () {
        return (
            '' +
            this.hours() +
            zeroFill(this.minutes(), 2) +
            zeroFill(this.seconds(), 2)
        );
    });

    function meridiem(token, lowercase) {
        addFormatToken(token, 0, 0, function () {
            return this.localeData().meridiem(
                this.hours(),
                this.minutes(),
                lowercase
            );
        });
    }

    meridiem('a', true);
    meridiem('A', false);

    // ALIASES

    addUnitAlias('hour', 'h');

    // PRIORITY
    addUnitPriority('hour', 13);

    // PARSING

    function matchMeridiem(isStrict, locale) {
        return locale._meridiemParse;
    }

    addRegexToken('a', matchMeridiem);
    addRegexToken('A', matchMeridiem);
    addRegexToken('H', match1to2);
    addRegexToken('h', match1to2);
    addRegexToken('k', match1to2);
    addRegexToken('HH', match1to2, match2);
    addRegexToken('hh', match1to2, match2);
    addRegexToken('kk', match1to2, match2);

    addRegexToken('hmm', match3to4);
    addRegexToken('hmmss', match5to6);
    addRegexToken('Hmm', match3to4);
    addRegexToken('Hmmss', match5to6);

    addParseToken(['H', 'HH'], HOUR);
    addParseToken(['k', 'kk'], function (input, array, config) {
        var kInput = toInt(input);
        array[HOUR] = kInput === 24 ? 0 : kInput;
    });
    addParseToken(['a', 'A'], function (input, array, config) {
        config._isPm = config._locale.isPM(input);
        config._meridiem = input;
    });
    addParseToken(['h', 'hh'], function (input, array, config) {
        array[HOUR] = toInt(input);
        getParsingFlags(config).bigHour = true;
    });
    addParseToken('hmm', function (input, array, config) {
        var pos = input.length - 2;
        array[HOUR] = toInt(input.substr(0, pos));
        array[MINUTE] = toInt(input.substr(pos));
        getParsingFlags(config).bigHour = true;
    });
    addParseToken('hmmss', function (input, array, config) {
        var pos1 = input.length - 4,
            pos2 = input.length - 2;
        array[HOUR] = toInt(input.substr(0, pos1));
        array[MINUTE] = toInt(input.substr(pos1, 2));
        array[SECOND] = toInt(input.substr(pos2));
        getParsingFlags(config).bigHour = true;
    });
    addParseToken('Hmm', function (input, array, config) {
        var pos = input.length - 2;
        array[HOUR] = toInt(input.substr(0, pos));
        array[MINUTE] = toInt(input.substr(pos));
    });
    addParseToken('Hmmss', function (input, array, config) {
        var pos1 = input.length - 4,
            pos2 = input.length - 2;
        array[HOUR] = toInt(input.substr(0, pos1));
        array[MINUTE] = toInt(input.substr(pos1, 2));
        array[SECOND] = toInt(input.substr(pos2));
    });

    // LOCALES

    function localeIsPM(input) {
        // IE8 Quirks Mode & IE7 Standards Mode do not allow accessing strings like arrays
        // Using charAt should be more compatible.
        return (input + '').toLowerCase().charAt(0) === 'p';
    }

    var defaultLocaleMeridiemParse = /[ap]\.?m?\.?/i,
        // Setting the hour should keep the time, because the user explicitly
        // specified which hour they want. So trying to maintain the same hour (in
        // a new timezone) makes sense. Adding/subtracting hours does not follow
        // this rule.
        getSetHour = makeGetSet('Hours', true);

    function localeMeridiem(hours, minutes, isLower) {
        if (hours > 11) {
            return isLower ? 'pm' : 'PM';
        } else {
            return isLower ? 'am' : 'AM';
        }
    }

    var baseConfig = {
        calendar: defaultCalendar,
        longDateFormat: defaultLongDateFormat,
        invalidDate: defaultInvalidDate,
        ordinal: defaultOrdinal,
        dayOfMonthOrdinalParse: defaultDayOfMonthOrdinalParse,
        relativeTime: defaultRelativeTime,

        months: defaultLocaleMonths,
        monthsShort: defaultLocaleMonthsShort,

        week: defaultLocaleWeek,

        weekdays: defaultLocaleWeekdays,
        weekdaysMin: defaultLocaleWeekdaysMin,
        weekdaysShort: defaultLocaleWeekdaysShort,

        meridiemParse: defaultLocaleMeridiemParse,
    };

    // internal storage for locale config files
    var locales = {},
        localeFamilies = {},
        globalLocale;

    function commonPrefix(arr1, arr2) {
        var i,
            minl = Math.min(arr1.length, arr2.length);
        for (i = 0; i < minl; i += 1) {
            if (arr1[i] !== arr2[i]) {
                return i;
            }
        }
        return minl;
    }

    function normalizeLocale(key) {
        return key ? key.toLowerCase().replace('_', '-') : key;
    }

    // pick the locale from the array
    // try ['en-au', 'en-gb'] as 'en-au', 'en-gb', 'en', as in move through the list trying each
    // substring from most specific to least, but move to the next array item if it's a more specific variant than the current root
    function chooseLocale(names) {
        var i = 0,
            j,
            next,
            locale,
            split;

        while (i < names.length) {
            split = normalizeLocale(names[i]).split('-');
            j = split.length;
            next = normalizeLocale(names[i + 1]);
            next = next ? next.split('-') : null;
            while (j > 0) {
                locale = loadLocale(split.slice(0, j).join('-'));
                if (locale) {
                    return locale;
                }
                if (
                    next &&
                    next.length >= j &&
                    commonPrefix(split, next) >= j - 1
                ) {
                    //the next array item is better than a shallower substring of this one
                    break;
                }
                j--;
            }
            i++;
        }
        return globalLocale;
    }

    function loadLocale(name) {
        var oldLocale = null,
            aliasedRequire;
        // TODO: Find a better way to register and load all the locales in Node
        if (
            locales[name] === undefined &&
            'object' !== 'undefined' &&
            module &&
            module.exports
        ) {
            try {
                oldLocale = globalLocale._abbr;
                aliasedRequire = commonjsRequire;
                aliasedRequire('./locale/' + name);
                getSetGlobalLocale(oldLocale);
            } catch (e) {
                // mark as not found to avoid repeating expensive file require call causing high CPU
                // when trying to find en-US, en_US, en-us for every format call
                locales[name] = null; // null means not found
            }
        }
        return locales[name];
    }

    // This function will load locale and then set the global locale.  If
    // no arguments are passed in, it will simply return the current global
    // locale key.
    function getSetGlobalLocale(key, values) {
        var data;
        if (key) {
            if (isUndefined(values)) {
                data = getLocale(key);
            } else {
                data = defineLocale(key, values);
            }

            if (data) {
                // moment.duration._locale = moment._locale = data;
                globalLocale = data;
            } else {
                if (typeof console !== 'undefined' && console.warn) {
                    //warn user if arguments are passed but the locale could not be set
                    console.warn(
                        'Locale ' + key + ' not found. Did you forget to load it?'
                    );
                }
            }
        }

        return globalLocale._abbr;
    }

    function defineLocale(name, config) {
        if (config !== null) {
            var locale,
                parentConfig = baseConfig;
            config.abbr = name;
            if (locales[name] != null) {
                deprecateSimple(
                    'defineLocaleOverride',
                    'use moment.updateLocale(localeName, config) to change ' +
                        'an existing locale. moment.defineLocale(localeName, ' +
                        'config) should only be used for creating a new locale ' +
                        'See http://momentjs.com/guides/#/warnings/define-locale/ for more info.'
                );
                parentConfig = locales[name]._config;
            } else if (config.parentLocale != null) {
                if (locales[config.parentLocale] != null) {
                    parentConfig = locales[config.parentLocale]._config;
                } else {
                    locale = loadLocale(config.parentLocale);
                    if (locale != null) {
                        parentConfig = locale._config;
                    } else {
                        if (!localeFamilies[config.parentLocale]) {
                            localeFamilies[config.parentLocale] = [];
                        }
                        localeFamilies[config.parentLocale].push({
                            name: name,
                            config: config,
                        });
                        return null;
                    }
                }
            }
            locales[name] = new Locale(mergeConfigs(parentConfig, config));

            if (localeFamilies[name]) {
                localeFamilies[name].forEach(function (x) {
                    defineLocale(x.name, x.config);
                });
            }

            // backwards compat for now: also set the locale
            // make sure we set the locale AFTER all child locales have been
            // created, so we won't end up with the child locale set.
            getSetGlobalLocale(name);

            return locales[name];
        } else {
            // useful for testing
            delete locales[name];
            return null;
        }
    }

    function updateLocale(name, config) {
        if (config != null) {
            var locale,
                tmpLocale,
                parentConfig = baseConfig;

            if (locales[name] != null && locales[name].parentLocale != null) {
                // Update existing child locale in-place to avoid memory-leaks
                locales[name].set(mergeConfigs(locales[name]._config, config));
            } else {
                // MERGE
                tmpLocale = loadLocale(name);
                if (tmpLocale != null) {
                    parentConfig = tmpLocale._config;
                }
                config = mergeConfigs(parentConfig, config);
                if (tmpLocale == null) {
                    // updateLocale is called for creating a new locale
                    // Set abbr so it will have a name (getters return
                    // undefined otherwise).
                    config.abbr = name;
                }
                locale = new Locale(config);
                locale.parentLocale = locales[name];
                locales[name] = locale;
            }

            // backwards compat for now: also set the locale
            getSetGlobalLocale(name);
        } else {
            // pass null for config to unupdate, useful for tests
            if (locales[name] != null) {
                if (locales[name].parentLocale != null) {
                    locales[name] = locales[name].parentLocale;
                    if (name === getSetGlobalLocale()) {
                        getSetGlobalLocale(name);
                    }
                } else if (locales[name] != null) {
                    delete locales[name];
                }
            }
        }
        return locales[name];
    }

    // returns locale data
    function getLocale(key) {
        var locale;

        if (key && key._locale && key._locale._abbr) {
            key = key._locale._abbr;
        }

        if (!key) {
            return globalLocale;
        }

        if (!isArray(key)) {
            //short-circuit everything else
            locale = loadLocale(key);
            if (locale) {
                return locale;
            }
            key = [key];
        }

        return chooseLocale(key);
    }

    function listLocales() {
        return keys(locales);
    }

    function checkOverflow(m) {
        var overflow,
            a = m._a;

        if (a && getParsingFlags(m).overflow === -2) {
            overflow =
                a[MONTH] < 0 || a[MONTH] > 11
                    ? MONTH
                    : a[DATE] < 1 || a[DATE] > daysInMonth(a[YEAR], a[MONTH])
                    ? DATE
                    : a[HOUR] < 0 ||
                      a[HOUR] > 24 ||
                      (a[HOUR] === 24 &&
                          (a[MINUTE] !== 0 ||
                              a[SECOND] !== 0 ||
                              a[MILLISECOND] !== 0))
                    ? HOUR
                    : a[MINUTE] < 0 || a[MINUTE] > 59
                    ? MINUTE
                    : a[SECOND] < 0 || a[SECOND] > 59
                    ? SECOND
                    : a[MILLISECOND] < 0 || a[MILLISECOND] > 999
                    ? MILLISECOND
                    : -1;

            if (
                getParsingFlags(m)._overflowDayOfYear &&
                (overflow < YEAR || overflow > DATE)
            ) {
                overflow = DATE;
            }
            if (getParsingFlags(m)._overflowWeeks && overflow === -1) {
                overflow = WEEK;
            }
            if (getParsingFlags(m)._overflowWeekday && overflow === -1) {
                overflow = WEEKDAY;
            }

            getParsingFlags(m).overflow = overflow;
        }

        return m;
    }

    // iso 8601 regex
    // 0000-00-00 0000-W00 or 0000-W00-0 + T + 00 or 00:00 or 00:00:00 or 00:00:00.000 + +00:00 or +0000 or +00)
    var extendedIsoRegex = /^\s*((?:[+-]\d{6}|\d{4})-(?:\d\d-\d\d|W\d\d-\d|W\d\d|\d\d\d|\d\d))(?:(T| )(\d\d(?::\d\d(?::\d\d(?:[.,]\d+)?)?)?)([+-]\d\d(?::?\d\d)?|\s*Z)?)?$/,
        basicIsoRegex = /^\s*((?:[+-]\d{6}|\d{4})(?:\d\d\d\d|W\d\d\d|W\d\d|\d\d\d|\d\d|))(?:(T| )(\d\d(?:\d\d(?:\d\d(?:[.,]\d+)?)?)?)([+-]\d\d(?::?\d\d)?|\s*Z)?)?$/,
        tzRegex = /Z|[+-]\d\d(?::?\d\d)?/,
        isoDates = [
            ['YYYYYY-MM-DD', /[+-]\d{6}-\d\d-\d\d/],
            ['YYYY-MM-DD', /\d{4}-\d\d-\d\d/],
            ['GGGG-[W]WW-E', /\d{4}-W\d\d-\d/],
            ['GGGG-[W]WW', /\d{4}-W\d\d/, false],
            ['YYYY-DDD', /\d{4}-\d{3}/],
            ['YYYY-MM', /\d{4}-\d\d/, false],
            ['YYYYYYMMDD', /[+-]\d{10}/],
            ['YYYYMMDD', /\d{8}/],
            ['GGGG[W]WWE', /\d{4}W\d{3}/],
            ['GGGG[W]WW', /\d{4}W\d{2}/, false],
            ['YYYYDDD', /\d{7}/],
            ['YYYYMM', /\d{6}/, false],
            ['YYYY', /\d{4}/, false],
        ],
        // iso time formats and regexes
        isoTimes = [
            ['HH:mm:ss.SSSS', /\d\d:\d\d:\d\d\.\d+/],
            ['HH:mm:ss,SSSS', /\d\d:\d\d:\d\d,\d+/],
            ['HH:mm:ss', /\d\d:\d\d:\d\d/],
            ['HH:mm', /\d\d:\d\d/],
            ['HHmmss.SSSS', /\d\d\d\d\d\d\.\d+/],
            ['HHmmss,SSSS', /\d\d\d\d\d\d,\d+/],
            ['HHmmss', /\d\d\d\d\d\d/],
            ['HHmm', /\d\d\d\d/],
            ['HH', /\d\d/],
        ],
        aspNetJsonRegex = /^\/?Date\((-?\d+)/i,
        // RFC 2822 regex: For details see https://tools.ietf.org/html/rfc2822#section-3.3
        rfc2822 = /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),?\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|([+-]\d{4}))$/,
        obsOffsets = {
            UT: 0,
            GMT: 0,
            EDT: -4 * 60,
            EST: -5 * 60,
            CDT: -5 * 60,
            CST: -6 * 60,
            MDT: -6 * 60,
            MST: -7 * 60,
            PDT: -7 * 60,
            PST: -8 * 60,
        };

    // date from iso format
    function configFromISO(config) {
        var i,
            l,
            string = config._i,
            match = extendedIsoRegex.exec(string) || basicIsoRegex.exec(string),
            allowTime,
            dateFormat,
            timeFormat,
            tzFormat;

        if (match) {
            getParsingFlags(config).iso = true;

            for (i = 0, l = isoDates.length; i < l; i++) {
                if (isoDates[i][1].exec(match[1])) {
                    dateFormat = isoDates[i][0];
                    allowTime = isoDates[i][2] !== false;
                    break;
                }
            }
            if (dateFormat == null) {
                config._isValid = false;
                return;
            }
            if (match[3]) {
                for (i = 0, l = isoTimes.length; i < l; i++) {
                    if (isoTimes[i][1].exec(match[3])) {
                        // match[2] should be 'T' or space
                        timeFormat = (match[2] || ' ') + isoTimes[i][0];
                        break;
                    }
                }
                if (timeFormat == null) {
                    config._isValid = false;
                    return;
                }
            }
            if (!allowTime && timeFormat != null) {
                config._isValid = false;
                return;
            }
            if (match[4]) {
                if (tzRegex.exec(match[4])) {
                    tzFormat = 'Z';
                } else {
                    config._isValid = false;
                    return;
                }
            }
            config._f = dateFormat + (timeFormat || '') + (tzFormat || '');
            configFromStringAndFormat(config);
        } else {
            config._isValid = false;
        }
    }

    function extractFromRFC2822Strings(
        yearStr,
        monthStr,
        dayStr,
        hourStr,
        minuteStr,
        secondStr
    ) {
        var result = [
            untruncateYear(yearStr),
            defaultLocaleMonthsShort.indexOf(monthStr),
            parseInt(dayStr, 10),
            parseInt(hourStr, 10),
            parseInt(minuteStr, 10),
        ];

        if (secondStr) {
            result.push(parseInt(secondStr, 10));
        }

        return result;
    }

    function untruncateYear(yearStr) {
        var year = parseInt(yearStr, 10);
        if (year <= 49) {
            return 2000 + year;
        } else if (year <= 999) {
            return 1900 + year;
        }
        return year;
    }

    function preprocessRFC2822(s) {
        // Remove comments and folding whitespace and replace multiple-spaces with a single space
        return s
            .replace(/\([^)]*\)|[\n\t]/g, ' ')
            .replace(/(\s\s+)/g, ' ')
            .replace(/^\s\s*/, '')
            .replace(/\s\s*$/, '');
    }

    function checkWeekday(weekdayStr, parsedInput, config) {
        if (weekdayStr) {
            // TODO: Replace the vanilla JS Date object with an independent day-of-week check.
            var weekdayProvided = defaultLocaleWeekdaysShort.indexOf(weekdayStr),
                weekdayActual = new Date(
                    parsedInput[0],
                    parsedInput[1],
                    parsedInput[2]
                ).getDay();
            if (weekdayProvided !== weekdayActual) {
                getParsingFlags(config).weekdayMismatch = true;
                config._isValid = false;
                return false;
            }
        }
        return true;
    }

    function calculateOffset(obsOffset, militaryOffset, numOffset) {
        if (obsOffset) {
            return obsOffsets[obsOffset];
        } else if (militaryOffset) {
            // the only allowed military tz is Z
            return 0;
        } else {
            var hm = parseInt(numOffset, 10),
                m = hm % 100,
                h = (hm - m) / 100;
            return h * 60 + m;
        }
    }

    // date and time from ref 2822 format
    function configFromRFC2822(config) {
        var match = rfc2822.exec(preprocessRFC2822(config._i)),
            parsedArray;
        if (match) {
            parsedArray = extractFromRFC2822Strings(
                match[4],
                match[3],
                match[2],
                match[5],
                match[6],
                match[7]
            );
            if (!checkWeekday(match[1], parsedArray, config)) {
                return;
            }

            config._a = parsedArray;
            config._tzm = calculateOffset(match[8], match[9], match[10]);

            config._d = createUTCDate.apply(null, config._a);
            config._d.setUTCMinutes(config._d.getUTCMinutes() - config._tzm);

            getParsingFlags(config).rfc2822 = true;
        } else {
            config._isValid = false;
        }
    }

    // date from 1) ASP.NET, 2) ISO, 3) RFC 2822 formats, or 4) optional fallback if parsing isn't strict
    function configFromString(config) {
        var matched = aspNetJsonRegex.exec(config._i);
        if (matched !== null) {
            config._d = new Date(+matched[1]);
            return;
        }

        configFromISO(config);
        if (config._isValid === false) {
            delete config._isValid;
        } else {
            return;
        }

        configFromRFC2822(config);
        if (config._isValid === false) {
            delete config._isValid;
        } else {
            return;
        }

        if (config._strict) {
            config._isValid = false;
        } else {
            // Final attempt, use Input Fallback
            hooks.createFromInputFallback(config);
        }
    }

    hooks.createFromInputFallback = deprecate(
        'value provided is not in a recognized RFC2822 or ISO format. moment construction falls back to js Date(), ' +
            'which is not reliable across all browsers and versions. Non RFC2822/ISO date formats are ' +
            'discouraged. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info.',
        function (config) {
            config._d = new Date(config._i + (config._useUTC ? ' UTC' : ''));
        }
    );

    // Pick the first defined of two or three arguments.
    function defaults(a, b, c) {
        if (a != null) {
            return a;
        }
        if (b != null) {
            return b;
        }
        return c;
    }

    function currentDateArray(config) {
        // hooks is actually the exported moment object
        var nowValue = new Date(hooks.now());
        if (config._useUTC) {
            return [
                nowValue.getUTCFullYear(),
                nowValue.getUTCMonth(),
                nowValue.getUTCDate(),
            ];
        }
        return [nowValue.getFullYear(), nowValue.getMonth(), nowValue.getDate()];
    }

    // convert an array to a date.
    // the array should mirror the parameters below
    // note: all values past the year are optional and will default to the lowest possible value.
    // [year, month, day , hour, minute, second, millisecond]
    function configFromArray(config) {
        var i,
            date,
            input = [],
            currentDate,
            expectedWeekday,
            yearToUse;

        if (config._d) {
            return;
        }

        currentDate = currentDateArray(config);

        //compute day of the year from weeks and weekdays
        if (config._w && config._a[DATE] == null && config._a[MONTH] == null) {
            dayOfYearFromWeekInfo(config);
        }

        //if the day of the year is set, figure out what it is
        if (config._dayOfYear != null) {
            yearToUse = defaults(config._a[YEAR], currentDate[YEAR]);

            if (
                config._dayOfYear > daysInYear(yearToUse) ||
                config._dayOfYear === 0
            ) {
                getParsingFlags(config)._overflowDayOfYear = true;
            }

            date = createUTCDate(yearToUse, 0, config._dayOfYear);
            config._a[MONTH] = date.getUTCMonth();
            config._a[DATE] = date.getUTCDate();
        }

        // Default to current date.
        // * if no year, month, day of month are given, default to today
        // * if day of month is given, default month and year
        // * if month is given, default only year
        // * if year is given, don't default anything
        for (i = 0; i < 3 && config._a[i] == null; ++i) {
            config._a[i] = input[i] = currentDate[i];
        }

        // Zero out whatever was not defaulted, including time
        for (; i < 7; i++) {
            config._a[i] = input[i] =
                config._a[i] == null ? (i === 2 ? 1 : 0) : config._a[i];
        }

        // Check for 24:00:00.000
        if (
            config._a[HOUR] === 24 &&
            config._a[MINUTE] === 0 &&
            config._a[SECOND] === 0 &&
            config._a[MILLISECOND] === 0
        ) {
            config._nextDay = true;
            config._a[HOUR] = 0;
        }

        config._d = (config._useUTC ? createUTCDate : createDate).apply(
            null,
            input
        );
        expectedWeekday = config._useUTC
            ? config._d.getUTCDay()
            : config._d.getDay();

        // Apply timezone offset from input. The actual utcOffset can be changed
        // with parseZone.
        if (config._tzm != null) {
            config._d.setUTCMinutes(config._d.getUTCMinutes() - config._tzm);
        }

        if (config._nextDay) {
            config._a[HOUR] = 24;
        }

        // check for mismatching day of week
        if (
            config._w &&
            typeof config._w.d !== 'undefined' &&
            config._w.d !== expectedWeekday
        ) {
            getParsingFlags(config).weekdayMismatch = true;
        }
    }

    function dayOfYearFromWeekInfo(config) {
        var w, weekYear, week, weekday, dow, doy, temp, weekdayOverflow, curWeek;

        w = config._w;
        if (w.GG != null || w.W != null || w.E != null) {
            dow = 1;
            doy = 4;

            // TODO: We need to take the current isoWeekYear, but that depends on
            // how we interpret now (local, utc, fixed offset). So create
            // a now version of current config (take local/utc/offset flags, and
            // create now).
            weekYear = defaults(
                w.GG,
                config._a[YEAR],
                weekOfYear(createLocal(), 1, 4).year
            );
            week = defaults(w.W, 1);
            weekday = defaults(w.E, 1);
            if (weekday < 1 || weekday > 7) {
                weekdayOverflow = true;
            }
        } else {
            dow = config._locale._week.dow;
            doy = config._locale._week.doy;

            curWeek = weekOfYear(createLocal(), dow, doy);

            weekYear = defaults(w.gg, config._a[YEAR], curWeek.year);

            // Default to current week.
            week = defaults(w.w, curWeek.week);

            if (w.d != null) {
                // weekday -- low day numbers are considered next week
                weekday = w.d;
                if (weekday < 0 || weekday > 6) {
                    weekdayOverflow = true;
                }
            } else if (w.e != null) {
                // local weekday -- counting starts from beginning of week
                weekday = w.e + dow;
                if (w.e < 0 || w.e > 6) {
                    weekdayOverflow = true;
                }
            } else {
                // default to beginning of week
                weekday = dow;
            }
        }
        if (week < 1 || week > weeksInYear(weekYear, dow, doy)) {
            getParsingFlags(config)._overflowWeeks = true;
        } else if (weekdayOverflow != null) {
            getParsingFlags(config)._overflowWeekday = true;
        } else {
            temp = dayOfYearFromWeeks(weekYear, week, weekday, dow, doy);
            config._a[YEAR] = temp.year;
            config._dayOfYear = temp.dayOfYear;
        }
    }

    // constant that refers to the ISO standard
    hooks.ISO_8601 = function () {};

    // constant that refers to the RFC 2822 form
    hooks.RFC_2822 = function () {};

    // date from string and format string
    function configFromStringAndFormat(config) {
        // TODO: Move this to another part of the creation flow to prevent circular deps
        if (config._f === hooks.ISO_8601) {
            configFromISO(config);
            return;
        }
        if (config._f === hooks.RFC_2822) {
            configFromRFC2822(config);
            return;
        }
        config._a = [];
        getParsingFlags(config).empty = true;

        // This array is used to make a Date, either with `new Date` or `Date.UTC`
        var string = '' + config._i,
            i,
            parsedInput,
            tokens,
            token,
            skipped,
            stringLength = string.length,
            totalParsedInputLength = 0,
            era;

        tokens =
            expandFormat(config._f, config._locale).match(formattingTokens) || [];

        for (i = 0; i < tokens.length; i++) {
            token = tokens[i];
            parsedInput = (string.match(getParseRegexForToken(token, config)) ||
                [])[0];
            if (parsedInput) {
                skipped = string.substr(0, string.indexOf(parsedInput));
                if (skipped.length > 0) {
                    getParsingFlags(config).unusedInput.push(skipped);
                }
                string = string.slice(
                    string.indexOf(parsedInput) + parsedInput.length
                );
                totalParsedInputLength += parsedInput.length;
            }
            // don't parse if it's not a known token
            if (formatTokenFunctions[token]) {
                if (parsedInput) {
                    getParsingFlags(config).empty = false;
                } else {
                    getParsingFlags(config).unusedTokens.push(token);
                }
                addTimeToArrayFromToken(token, parsedInput, config);
            } else if (config._strict && !parsedInput) {
                getParsingFlags(config).unusedTokens.push(token);
            }
        }

        // add remaining unparsed input length to the string
        getParsingFlags(config).charsLeftOver =
            stringLength - totalParsedInputLength;
        if (string.length > 0) {
            getParsingFlags(config).unusedInput.push(string);
        }

        // clear _12h flag if hour is <= 12
        if (
            config._a[HOUR] <= 12 &&
            getParsingFlags(config).bigHour === true &&
            config._a[HOUR] > 0
        ) {
            getParsingFlags(config).bigHour = undefined;
        }

        getParsingFlags(config).parsedDateParts = config._a.slice(0);
        getParsingFlags(config).meridiem = config._meridiem;
        // handle meridiem
        config._a[HOUR] = meridiemFixWrap(
            config._locale,
            config._a[HOUR],
            config._meridiem
        );

        // handle era
        era = getParsingFlags(config).era;
        if (era !== null) {
            config._a[YEAR] = config._locale.erasConvertYear(era, config._a[YEAR]);
        }

        configFromArray(config);
        checkOverflow(config);
    }

    function meridiemFixWrap(locale, hour, meridiem) {
        var isPm;

        if (meridiem == null) {
            // nothing to do
            return hour;
        }
        if (locale.meridiemHour != null) {
            return locale.meridiemHour(hour, meridiem);
        } else if (locale.isPM != null) {
            // Fallback
            isPm = locale.isPM(meridiem);
            if (isPm && hour < 12) {
                hour += 12;
            }
            if (!isPm && hour === 12) {
                hour = 0;
            }
            return hour;
        } else {
            // this is not supposed to happen
            return hour;
        }
    }

    // date from string and array of format strings
    function configFromStringAndArray(config) {
        var tempConfig,
            bestMoment,
            scoreToBeat,
            i,
            currentScore,
            validFormatFound,
            bestFormatIsValid = false;

        if (config._f.length === 0) {
            getParsingFlags(config).invalidFormat = true;
            config._d = new Date(NaN);
            return;
        }

        for (i = 0; i < config._f.length; i++) {
            currentScore = 0;
            validFormatFound = false;
            tempConfig = copyConfig({}, config);
            if (config._useUTC != null) {
                tempConfig._useUTC = config._useUTC;
            }
            tempConfig._f = config._f[i];
            configFromStringAndFormat(tempConfig);

            if (isValid(tempConfig)) {
                validFormatFound = true;
            }

            // if there is any input that was not parsed add a penalty for that format
            currentScore += getParsingFlags(tempConfig).charsLeftOver;

            //or tokens
            currentScore += getParsingFlags(tempConfig).unusedTokens.length * 10;

            getParsingFlags(tempConfig).score = currentScore;

            if (!bestFormatIsValid) {
                if (
                    scoreToBeat == null ||
                    currentScore < scoreToBeat ||
                    validFormatFound
                ) {
                    scoreToBeat = currentScore;
                    bestMoment = tempConfig;
                    if (validFormatFound) {
                        bestFormatIsValid = true;
                    }
                }
            } else {
                if (currentScore < scoreToBeat) {
                    scoreToBeat = currentScore;
                    bestMoment = tempConfig;
                }
            }
        }

        extend(config, bestMoment || tempConfig);
    }

    function configFromObject(config) {
        if (config._d) {
            return;
        }

        var i = normalizeObjectUnits(config._i),
            dayOrDate = i.day === undefined ? i.date : i.day;
        config._a = map(
            [i.year, i.month, dayOrDate, i.hour, i.minute, i.second, i.millisecond],
            function (obj) {
                return obj && parseInt(obj, 10);
            }
        );

        configFromArray(config);
    }

    function createFromConfig(config) {
        var res = new Moment(checkOverflow(prepareConfig(config)));
        if (res._nextDay) {
            // Adding is smart enough around DST
            res.add(1, 'd');
            res._nextDay = undefined;
        }

        return res;
    }

    function prepareConfig(config) {
        var input = config._i,
            format = config._f;

        config._locale = config._locale || getLocale(config._l);

        if (input === null || (format === undefined && input === '')) {
            return createInvalid({ nullInput: true });
        }

        if (typeof input === 'string') {
            config._i = input = config._locale.preparse(input);
        }

        if (isMoment(input)) {
            return new Moment(checkOverflow(input));
        } else if (isDate(input)) {
            config._d = input;
        } else if (isArray(format)) {
            configFromStringAndArray(config);
        } else if (format) {
            configFromStringAndFormat(config);
        } else {
            configFromInput(config);
        }

        if (!isValid(config)) {
            config._d = null;
        }

        return config;
    }

    function configFromInput(config) {
        var input = config._i;
        if (isUndefined(input)) {
            config._d = new Date(hooks.now());
        } else if (isDate(input)) {
            config._d = new Date(input.valueOf());
        } else if (typeof input === 'string') {
            configFromString(config);
        } else if (isArray(input)) {
            config._a = map(input.slice(0), function (obj) {
                return parseInt(obj, 10);
            });
            configFromArray(config);
        } else if (isObject(input)) {
            configFromObject(config);
        } else if (isNumber(input)) {
            // from milliseconds
            config._d = new Date(input);
        } else {
            hooks.createFromInputFallback(config);
        }
    }

    function createLocalOrUTC(input, format, locale, strict, isUTC) {
        var c = {};

        if (format === true || format === false) {
            strict = format;
            format = undefined;
        }

        if (locale === true || locale === false) {
            strict = locale;
            locale = undefined;
        }

        if (
            (isObject(input) && isObjectEmpty(input)) ||
            (isArray(input) && input.length === 0)
        ) {
            input = undefined;
        }
        // object construction must be done this way.
        // https://github.com/moment/moment/issues/1423
        c._isAMomentObject = true;
        c._useUTC = c._isUTC = isUTC;
        c._l = locale;
        c._i = input;
        c._f = format;
        c._strict = strict;

        return createFromConfig(c);
    }

    function createLocal(input, format, locale, strict) {
        return createLocalOrUTC(input, format, locale, strict, false);
    }

    var prototypeMin = deprecate(
            'moment().min is deprecated, use moment.max instead. http://momentjs.com/guides/#/warnings/min-max/',
            function () {
                var other = createLocal.apply(null, arguments);
                if (this.isValid() && other.isValid()) {
                    return other < this ? this : other;
                } else {
                    return createInvalid();
                }
            }
        ),
        prototypeMax = deprecate(
            'moment().max is deprecated, use moment.min instead. http://momentjs.com/guides/#/warnings/min-max/',
            function () {
                var other = createLocal.apply(null, arguments);
                if (this.isValid() && other.isValid()) {
                    return other > this ? this : other;
                } else {
                    return createInvalid();
                }
            }
        );

    // Pick a moment m from moments so that m[fn](other) is true for all
    // other. This relies on the function fn to be transitive.
    //
    // moments should either be an array of moment objects or an array, whose
    // first element is an array of moment objects.
    function pickBy(fn, moments) {
        var res, i;
        if (moments.length === 1 && isArray(moments[0])) {
            moments = moments[0];
        }
        if (!moments.length) {
            return createLocal();
        }
        res = moments[0];
        for (i = 1; i < moments.length; ++i) {
            if (!moments[i].isValid() || moments[i][fn](res)) {
                res = moments[i];
            }
        }
        return res;
    }

    // TODO: Use [].sort instead?
    function min() {
        var args = [].slice.call(arguments, 0);

        return pickBy('isBefore', args);
    }

    function max() {
        var args = [].slice.call(arguments, 0);

        return pickBy('isAfter', args);
    }

    var now = function () {
        return Date.now ? Date.now() : +new Date();
    };

    var ordering = [
        'year',
        'quarter',
        'month',
        'week',
        'day',
        'hour',
        'minute',
        'second',
        'millisecond',
    ];

    function isDurationValid(m) {
        var key,
            unitHasDecimal = false,
            i;
        for (key in m) {
            if (
                hasOwnProp(m, key) &&
                !(
                    indexOf.call(ordering, key) !== -1 &&
                    (m[key] == null || !isNaN(m[key]))
                )
            ) {
                return false;
            }
        }

        for (i = 0; i < ordering.length; ++i) {
            if (m[ordering[i]]) {
                if (unitHasDecimal) {
                    return false; // only allow non-integers for smallest unit
                }
                if (parseFloat(m[ordering[i]]) !== toInt(m[ordering[i]])) {
                    unitHasDecimal = true;
                }
            }
        }

        return true;
    }

    function isValid$1() {
        return this._isValid;
    }

    function createInvalid$1() {
        return createDuration(NaN);
    }

    function Duration(duration) {
        var normalizedInput = normalizeObjectUnits(duration),
            years = normalizedInput.year || 0,
            quarters = normalizedInput.quarter || 0,
            months = normalizedInput.month || 0,
            weeks = normalizedInput.week || normalizedInput.isoWeek || 0,
            days = normalizedInput.day || 0,
            hours = normalizedInput.hour || 0,
            minutes = normalizedInput.minute || 0,
            seconds = normalizedInput.second || 0,
            milliseconds = normalizedInput.millisecond || 0;

        this._isValid = isDurationValid(normalizedInput);

        // representation for dateAddRemove
        this._milliseconds =
            +milliseconds +
            seconds * 1e3 + // 1000
            minutes * 6e4 + // 1000 * 60
            hours * 1000 * 60 * 60; //using 1000 * 60 * 60 instead of 36e5 to avoid floating point rounding errors https://github.com/moment/moment/issues/2978
        // Because of dateAddRemove treats 24 hours as different from a
        // day when working around DST, we need to store them separately
        this._days = +days + weeks * 7;
        // It is impossible to translate months into days without knowing
        // which months you are are talking about, so we have to store
        // it separately.
        this._months = +months + quarters * 3 + years * 12;

        this._data = {};

        this._locale = getLocale();

        this._bubble();
    }

    function isDuration(obj) {
        return obj instanceof Duration;
    }

    function absRound(number) {
        if (number < 0) {
            return Math.round(-1 * number) * -1;
        } else {
            return Math.round(number);
        }
    }

    // compare two arrays, return the number of differences
    function compareArrays(array1, array2, dontConvert) {
        var len = Math.min(array1.length, array2.length),
            lengthDiff = Math.abs(array1.length - array2.length),
            diffs = 0,
            i;
        for (i = 0; i < len; i++) {
            if (
                (dontConvert && array1[i] !== array2[i]) ||
                (!dontConvert && toInt(array1[i]) !== toInt(array2[i]))
            ) {
                diffs++;
            }
        }
        return diffs + lengthDiff;
    }

    // FORMATTING

    function offset(token, separator) {
        addFormatToken(token, 0, 0, function () {
            var offset = this.utcOffset(),
                sign = '+';
            if (offset < 0) {
                offset = -offset;
                sign = '-';
            }
            return (
                sign +
                zeroFill(~~(offset / 60), 2) +
                separator +
                zeroFill(~~offset % 60, 2)
            );
        });
    }

    offset('Z', ':');
    offset('ZZ', '');

    // PARSING

    addRegexToken('Z', matchShortOffset);
    addRegexToken('ZZ', matchShortOffset);
    addParseToken(['Z', 'ZZ'], function (input, array, config) {
        config._useUTC = true;
        config._tzm = offsetFromString(matchShortOffset, input);
    });

    // HELPERS

    // timezone chunker
    // '+10:00' > ['10',  '00']
    // '-1530'  > ['-15', '30']
    var chunkOffset = /([\+\-]|\d\d)/gi;

    function offsetFromString(matcher, string) {
        var matches = (string || '').match(matcher),
            chunk,
            parts,
            minutes;

        if (matches === null) {
            return null;
        }

        chunk = matches[matches.length - 1] || [];
        parts = (chunk + '').match(chunkOffset) || ['-', 0, 0];
        minutes = +(parts[1] * 60) + toInt(parts[2]);

        return minutes === 0 ? 0 : parts[0] === '+' ? minutes : -minutes;
    }

    // Return a moment from input, that is local/utc/zone equivalent to model.
    function cloneWithOffset(input, model) {
        var res, diff;
        if (model._isUTC) {
            res = model.clone();
            diff =
                (isMoment(input) || isDate(input)
                    ? input.valueOf()
                    : createLocal(input).valueOf()) - res.valueOf();
            // Use low-level api, because this fn is low-level api.
            res._d.setTime(res._d.valueOf() + diff);
            hooks.updateOffset(res, false);
            return res;
        } else {
            return createLocal(input).local();
        }
    }

    function getDateOffset(m) {
        // On Firefox.24 Date#getTimezoneOffset returns a floating point.
        // https://github.com/moment/moment/pull/1871
        return -Math.round(m._d.getTimezoneOffset());
    }

    // HOOKS

    // This function will be called whenever a moment is mutated.
    // It is intended to keep the offset in sync with the timezone.
    hooks.updateOffset = function () {};

    // MOMENTS

    // keepLocalTime = true means only change the timezone, without
    // affecting the local hour. So 5:31:26 +0300 --[utcOffset(2, true)]-->
    // 5:31:26 +0200 It is possible that 5:31:26 doesn't exist with offset
    // +0200, so we adjust the time as needed, to be valid.
    //
    // Keeping the time actually adds/subtracts (one hour)
    // from the actual represented time. That is why we call updateOffset
    // a second time. In case it wants us to change the offset again
    // _changeInProgress == true case, then we have to adjust, because
    // there is no such time in the given timezone.
    function getSetOffset(input, keepLocalTime, keepMinutes) {
        var offset = this._offset || 0,
            localAdjust;
        if (!this.isValid()) {
            return input != null ? this : NaN;
        }
        if (input != null) {
            if (typeof input === 'string') {
                input = offsetFromString(matchShortOffset, input);
                if (input === null) {
                    return this;
                }
            } else if (Math.abs(input) < 16 && !keepMinutes) {
                input = input * 60;
            }
            if (!this._isUTC && keepLocalTime) {
                localAdjust = getDateOffset(this);
            }
            this._offset = input;
            this._isUTC = true;
            if (localAdjust != null) {
                this.add(localAdjust, 'm');
            }
            if (offset !== input) {
                if (!keepLocalTime || this._changeInProgress) {
                    addSubtract(
                        this,
                        createDuration(input - offset, 'm'),
                        1,
                        false
                    );
                } else if (!this._changeInProgress) {
                    this._changeInProgress = true;
                    hooks.updateOffset(this, true);
                    this._changeInProgress = null;
                }
            }
            return this;
        } else {
            return this._isUTC ? offset : getDateOffset(this);
        }
    }

    function getSetZone(input, keepLocalTime) {
        if (input != null) {
            if (typeof input !== 'string') {
                input = -input;
            }

            this.utcOffset(input, keepLocalTime);

            return this;
        } else {
            return -this.utcOffset();
        }
    }

    function setOffsetToUTC(keepLocalTime) {
        return this.utcOffset(0, keepLocalTime);
    }

    function setOffsetToLocal(keepLocalTime) {
        if (this._isUTC) {
            this.utcOffset(0, keepLocalTime);
            this._isUTC = false;

            if (keepLocalTime) {
                this.subtract(getDateOffset(this), 'm');
            }
        }
        return this;
    }

    function setOffsetToParsedOffset() {
        if (this._tzm != null) {
            this.utcOffset(this._tzm, false, true);
        } else if (typeof this._i === 'string') {
            var tZone = offsetFromString(matchOffset, this._i);
            if (tZone != null) {
                this.utcOffset(tZone);
            } else {
                this.utcOffset(0, true);
            }
        }
        return this;
    }

    function hasAlignedHourOffset(input) {
        if (!this.isValid()) {
            return false;
        }
        input = input ? createLocal(input).utcOffset() : 0;

        return (this.utcOffset() - input) % 60 === 0;
    }

    function isDaylightSavingTime() {
        return (
            this.utcOffset() > this.clone().month(0).utcOffset() ||
            this.utcOffset() > this.clone().month(5).utcOffset()
        );
    }

    function isDaylightSavingTimeShifted() {
        if (!isUndefined(this._isDSTShifted)) {
            return this._isDSTShifted;
        }

        var c = {},
            other;

        copyConfig(c, this);
        c = prepareConfig(c);

        if (c._a) {
            other = c._isUTC ? createUTC(c._a) : createLocal(c._a);
            this._isDSTShifted =
                this.isValid() && compareArrays(c._a, other.toArray()) > 0;
        } else {
            this._isDSTShifted = false;
        }

        return this._isDSTShifted;
    }

    function isLocal() {
        return this.isValid() ? !this._isUTC : false;
    }

    function isUtcOffset() {
        return this.isValid() ? this._isUTC : false;
    }

    function isUtc() {
        return this.isValid() ? this._isUTC && this._offset === 0 : false;
    }

    // ASP.NET json date format regex
    var aspNetRegex = /^(-|\+)?(?:(\d*)[. ])?(\d+):(\d+)(?::(\d+)(\.\d*)?)?$/,
        // from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
        // somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere
        // and further modified to allow for strings containing both week and day
        isoRegex = /^(-|\+)?P(?:([-+]?[0-9,.]*)Y)?(?:([-+]?[0-9,.]*)M)?(?:([-+]?[0-9,.]*)W)?(?:([-+]?[0-9,.]*)D)?(?:T(?:([-+]?[0-9,.]*)H)?(?:([-+]?[0-9,.]*)M)?(?:([-+]?[0-9,.]*)S)?)?$/;

    function createDuration(input, key) {
        var duration = input,
            // matching against regexp is expensive, do it on demand
            match = null,
            sign,
            ret,
            diffRes;

        if (isDuration(input)) {
            duration = {
                ms: input._milliseconds,
                d: input._days,
                M: input._months,
            };
        } else if (isNumber(input) || !isNaN(+input)) {
            duration = {};
            if (key) {
                duration[key] = +input;
            } else {
                duration.milliseconds = +input;
            }
        } else if ((match = aspNetRegex.exec(input))) {
            sign = match[1] === '-' ? -1 : 1;
            duration = {
                y: 0,
                d: toInt(match[DATE]) * sign,
                h: toInt(match[HOUR]) * sign,
                m: toInt(match[MINUTE]) * sign,
                s: toInt(match[SECOND]) * sign,
                ms: toInt(absRound(match[MILLISECOND] * 1000)) * sign, // the millisecond decimal point is included in the match
            };
        } else if ((match = isoRegex.exec(input))) {
            sign = match[1] === '-' ? -1 : 1;
            duration = {
                y: parseIso(match[2], sign),
                M: parseIso(match[3], sign),
                w: parseIso(match[4], sign),
                d: parseIso(match[5], sign),
                h: parseIso(match[6], sign),
                m: parseIso(match[7], sign),
                s: parseIso(match[8], sign),
            };
        } else if (duration == null) {
            // checks for null or undefined
            duration = {};
        } else if (
            typeof duration === 'object' &&
            ('from' in duration || 'to' in duration)
        ) {
            diffRes = momentsDifference(
                createLocal(duration.from),
                createLocal(duration.to)
            );

            duration = {};
            duration.ms = diffRes.milliseconds;
            duration.M = diffRes.months;
        }

        ret = new Duration(duration);

        if (isDuration(input) && hasOwnProp(input, '_locale')) {
            ret._locale = input._locale;
        }

        if (isDuration(input) && hasOwnProp(input, '_isValid')) {
            ret._isValid = input._isValid;
        }

        return ret;
    }

    createDuration.fn = Duration.prototype;
    createDuration.invalid = createInvalid$1;

    function parseIso(inp, sign) {
        // We'd normally use ~~inp for this, but unfortunately it also
        // converts floats to ints.
        // inp may be undefined, so careful calling replace on it.
        var res = inp && parseFloat(inp.replace(',', '.'));
        // apply sign while we're at it
        return (isNaN(res) ? 0 : res) * sign;
    }

    function positiveMomentsDifference(base, other) {
        var res = {};

        res.months =
            other.month() - base.month() + (other.year() - base.year()) * 12;
        if (base.clone().add(res.months, 'M').isAfter(other)) {
            --res.months;
        }

        res.milliseconds = +other - +base.clone().add(res.months, 'M');

        return res;
    }

    function momentsDifference(base, other) {
        var res;
        if (!(base.isValid() && other.isValid())) {
            return { milliseconds: 0, months: 0 };
        }

        other = cloneWithOffset(other, base);
        if (base.isBefore(other)) {
            res = positiveMomentsDifference(base, other);
        } else {
            res = positiveMomentsDifference(other, base);
            res.milliseconds = -res.milliseconds;
            res.months = -res.months;
        }

        return res;
    }

    // TODO: remove 'name' arg after deprecation is removed
    function createAdder(direction, name) {
        return function (val, period) {
            var dur, tmp;
            //invert the arguments, but complain about it
            if (period !== null && !isNaN(+period)) {
                deprecateSimple(
                    name,
                    'moment().' +
                        name +
                        '(period, number) is deprecated. Please use moment().' +
                        name +
                        '(number, period). ' +
                        'See http://momentjs.com/guides/#/warnings/add-inverted-param/ for more info.'
                );
                tmp = val;
                val = period;
                period = tmp;
            }

            dur = createDuration(val, period);
            addSubtract(this, dur, direction);
            return this;
        };
    }

    function addSubtract(mom, duration, isAdding, updateOffset) {
        var milliseconds = duration._milliseconds,
            days = absRound(duration._days),
            months = absRound(duration._months);

        if (!mom.isValid()) {
            // No op
            return;
        }

        updateOffset = updateOffset == null ? true : updateOffset;

        if (months) {
            setMonth(mom, get(mom, 'Month') + months * isAdding);
        }
        if (days) {
            set$1(mom, 'Date', get(mom, 'Date') + days * isAdding);
        }
        if (milliseconds) {
            mom._d.setTime(mom._d.valueOf() + milliseconds * isAdding);
        }
        if (updateOffset) {
            hooks.updateOffset(mom, days || months);
        }
    }

    var add = createAdder(1, 'add'),
        subtract = createAdder(-1, 'subtract');

    function isString(input) {
        return typeof input === 'string' || input instanceof String;
    }

    // type MomentInput = Moment | Date | string | number | (number | string)[] | MomentInputObject | void; // null | undefined
    function isMomentInput(input) {
        return (
            isMoment(input) ||
            isDate(input) ||
            isString(input) ||
            isNumber(input) ||
            isNumberOrStringArray(input) ||
            isMomentInputObject(input) ||
            input === null ||
            input === undefined
        );
    }

    function isMomentInputObject(input) {
        var objectTest = isObject(input) && !isObjectEmpty(input),
            propertyTest = false,
            properties = [
                'years',
                'year',
                'y',
                'months',
                'month',
                'M',
                'days',
                'day',
                'd',
                'dates',
                'date',
                'D',
                'hours',
                'hour',
                'h',
                'minutes',
                'minute',
                'm',
                'seconds',
                'second',
                's',
                'milliseconds',
                'millisecond',
                'ms',
            ],
            i,
            property;

        for (i = 0; i < properties.length; i += 1) {
            property = properties[i];
            propertyTest = propertyTest || hasOwnProp(input, property);
        }

        return objectTest && propertyTest;
    }

    function isNumberOrStringArray(input) {
        var arrayTest = isArray(input),
            dataTypeTest = false;
        if (arrayTest) {
            dataTypeTest =
                input.filter(function (item) {
                    return !isNumber(item) && isString(input);
                }).length === 0;
        }
        return arrayTest && dataTypeTest;
    }

    function isCalendarSpec(input) {
        var objectTest = isObject(input) && !isObjectEmpty(input),
            propertyTest = false,
            properties = [
                'sameDay',
                'nextDay',
                'lastDay',
                'nextWeek',
                'lastWeek',
                'sameElse',
            ],
            i,
            property;

        for (i = 0; i < properties.length; i += 1) {
            property = properties[i];
            propertyTest = propertyTest || hasOwnProp(input, property);
        }

        return objectTest && propertyTest;
    }

    function getCalendarFormat(myMoment, now) {
        var diff = myMoment.diff(now, 'days', true);
        return diff < -6
            ? 'sameElse'
            : diff < -1
            ? 'lastWeek'
            : diff < 0
            ? 'lastDay'
            : diff < 1
            ? 'sameDay'
            : diff < 2
            ? 'nextDay'
            : diff < 7
            ? 'nextWeek'
            : 'sameElse';
    }

    function calendar$1(time, formats) {
        // Support for single parameter, formats only overload to the calendar function
        if (arguments.length === 1) {
            if (!arguments[0]) {
                time = undefined;
                formats = undefined;
            } else if (isMomentInput(arguments[0])) {
                time = arguments[0];
                formats = undefined;
            } else if (isCalendarSpec(arguments[0])) {
                formats = arguments[0];
                time = undefined;
            }
        }
        // We want to compare the start of today, vs this.
        // Getting start-of-today depends on whether we're local/utc/offset or not.
        var now = time || createLocal(),
            sod = cloneWithOffset(now, this).startOf('day'),
            format = hooks.calendarFormat(this, sod) || 'sameElse',
            output =
                formats &&
                (isFunction(formats[format])
                    ? formats[format].call(this, now)
                    : formats[format]);

        return this.format(
            output || this.localeData().calendar(format, this, createLocal(now))
        );
    }

    function clone() {
        return new Moment(this);
    }

    function isAfter(input, units) {
        var localInput = isMoment(input) ? input : createLocal(input);
        if (!(this.isValid() && localInput.isValid())) {
            return false;
        }
        units = normalizeUnits(units) || 'millisecond';
        if (units === 'millisecond') {
            return this.valueOf() > localInput.valueOf();
        } else {
            return localInput.valueOf() < this.clone().startOf(units).valueOf();
        }
    }

    function isBefore(input, units) {
        var localInput = isMoment(input) ? input : createLocal(input);
        if (!(this.isValid() && localInput.isValid())) {
            return false;
        }
        units = normalizeUnits(units) || 'millisecond';
        if (units === 'millisecond') {
            return this.valueOf() < localInput.valueOf();
        } else {
            return this.clone().endOf(units).valueOf() < localInput.valueOf();
        }
    }

    function isBetween(from, to, units, inclusivity) {
        var localFrom = isMoment(from) ? from : createLocal(from),
            localTo = isMoment(to) ? to : createLocal(to);
        if (!(this.isValid() && localFrom.isValid() && localTo.isValid())) {
            return false;
        }
        inclusivity = inclusivity || '()';
        return (
            (inclusivity[0] === '('
                ? this.isAfter(localFrom, units)
                : !this.isBefore(localFrom, units)) &&
            (inclusivity[1] === ')'
                ? this.isBefore(localTo, units)
                : !this.isAfter(localTo, units))
        );
    }

    function isSame(input, units) {
        var localInput = isMoment(input) ? input : createLocal(input),
            inputMs;
        if (!(this.isValid() && localInput.isValid())) {
            return false;
        }
        units = normalizeUnits(units) || 'millisecond';
        if (units === 'millisecond') {
            return this.valueOf() === localInput.valueOf();
        } else {
            inputMs = localInput.valueOf();
            return (
                this.clone().startOf(units).valueOf() <= inputMs &&
                inputMs <= this.clone().endOf(units).valueOf()
            );
        }
    }

    function isSameOrAfter(input, units) {
        return this.isSame(input, units) || this.isAfter(input, units);
    }

    function isSameOrBefore(input, units) {
        return this.isSame(input, units) || this.isBefore(input, units);
    }

    function diff(input, units, asFloat) {
        var that, zoneDelta, output;

        if (!this.isValid()) {
            return NaN;
        }

        that = cloneWithOffset(input, this);

        if (!that.isValid()) {
            return NaN;
        }

        zoneDelta = (that.utcOffset() - this.utcOffset()) * 6e4;

        units = normalizeUnits(units);

        switch (units) {
            case 'year':
                output = monthDiff(this, that) / 12;
                break;
            case 'month':
                output = monthDiff(this, that);
                break;
            case 'quarter':
                output = monthDiff(this, that) / 3;
                break;
            case 'second':
                output = (this - that) / 1e3;
                break; // 1000
            case 'minute':
                output = (this - that) / 6e4;
                break; // 1000 * 60
            case 'hour':
                output = (this - that) / 36e5;
                break; // 1000 * 60 * 60
            case 'day':
                output = (this - that - zoneDelta) / 864e5;
                break; // 1000 * 60 * 60 * 24, negate dst
            case 'week':
                output = (this - that - zoneDelta) / 6048e5;
                break; // 1000 * 60 * 60 * 24 * 7, negate dst
            default:
                output = this - that;
        }

        return asFloat ? output : absFloor(output);
    }

    function monthDiff(a, b) {
        if (a.date() < b.date()) {
            // end-of-month calculations work correct when the start month has more
            // days than the end month.
            return -monthDiff(b, a);
        }
        // difference in months
        var wholeMonthDiff = (b.year() - a.year()) * 12 + (b.month() - a.month()),
            // b is in (anchor - 1 month, anchor + 1 month)
            anchor = a.clone().add(wholeMonthDiff, 'months'),
            anchor2,
            adjust;

        if (b - anchor < 0) {
            anchor2 = a.clone().add(wholeMonthDiff - 1, 'months');
            // linear across the month
            adjust = (b - anchor) / (anchor - anchor2);
        } else {
            anchor2 = a.clone().add(wholeMonthDiff + 1, 'months');
            // linear across the month
            adjust = (b - anchor) / (anchor2 - anchor);
        }

        //check for negative zero, return zero if negative zero
        return -(wholeMonthDiff + adjust) || 0;
    }

    hooks.defaultFormat = 'YYYY-MM-DDTHH:mm:ssZ';
    hooks.defaultFormatUtc = 'YYYY-MM-DDTHH:mm:ss[Z]';

    function toString() {
        return this.clone().locale('en').format('ddd MMM DD YYYY HH:mm:ss [GMT]ZZ');
    }

    function toISOString(keepOffset) {
        if (!this.isValid()) {
            return null;
        }
        var utc = keepOffset !== true,
            m = utc ? this.clone().utc() : this;
        if (m.year() < 0 || m.year() > 9999) {
            return formatMoment(
                m,
                utc
                    ? 'YYYYYY-MM-DD[T]HH:mm:ss.SSS[Z]'
                    : 'YYYYYY-MM-DD[T]HH:mm:ss.SSSZ'
            );
        }
        if (isFunction(Date.prototype.toISOString)) {
            // native implementation is ~50x faster, use it when we can
            if (utc) {
                return this.toDate().toISOString();
            } else {
                return new Date(this.valueOf() + this.utcOffset() * 60 * 1000)
                    .toISOString()
                    .replace('Z', formatMoment(m, 'Z'));
            }
        }
        return formatMoment(
            m,
            utc ? 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]' : 'YYYY-MM-DD[T]HH:mm:ss.SSSZ'
        );
    }

    /**
     * Return a human readable representation of a moment that can
     * also be evaluated to get a new moment which is the same
     *
     * @link https://nodejs.org/dist/latest/docs/api/util.html#util_custom_inspect_function_on_objects
     */
    function inspect() {
        if (!this.isValid()) {
            return 'moment.invalid(/* ' + this._i + ' */)';
        }
        var func = 'moment',
            zone = '',
            prefix,
            year,
            datetime,
            suffix;
        if (!this.isLocal()) {
            func = this.utcOffset() === 0 ? 'moment.utc' : 'moment.parseZone';
            zone = 'Z';
        }
        prefix = '[' + func + '("]';
        year = 0 <= this.year() && this.year() <= 9999 ? 'YYYY' : 'YYYYYY';
        datetime = '-MM-DD[T]HH:mm:ss.SSS';
        suffix = zone + '[")]';

        return this.format(prefix + year + datetime + suffix);
    }

    function format(inputString) {
        if (!inputString) {
            inputString = this.isUtc()
                ? hooks.defaultFormatUtc
                : hooks.defaultFormat;
        }
        var output = formatMoment(this, inputString);
        return this.localeData().postformat(output);
    }

    function from(time, withoutSuffix) {
        if (
            this.isValid() &&
            ((isMoment(time) && time.isValid()) || createLocal(time).isValid())
        ) {
            return createDuration({ to: this, from: time })
                .locale(this.locale())
                .humanize(!withoutSuffix);
        } else {
            return this.localeData().invalidDate();
        }
    }

    function fromNow(withoutSuffix) {
        return this.from(createLocal(), withoutSuffix);
    }

    function to(time, withoutSuffix) {
        if (
            this.isValid() &&
            ((isMoment(time) && time.isValid()) || createLocal(time).isValid())
        ) {
            return createDuration({ from: this, to: time })
                .locale(this.locale())
                .humanize(!withoutSuffix);
        } else {
            return this.localeData().invalidDate();
        }
    }

    function toNow(withoutSuffix) {
        return this.to(createLocal(), withoutSuffix);
    }

    // If passed a locale key, it will set the locale for this
    // instance.  Otherwise, it will return the locale configuration
    // variables for this instance.
    function locale(key) {
        var newLocaleData;

        if (key === undefined) {
            return this._locale._abbr;
        } else {
            newLocaleData = getLocale(key);
            if (newLocaleData != null) {
                this._locale = newLocaleData;
            }
            return this;
        }
    }

    var lang = deprecate(
        'moment().lang() is deprecated. Instead, use moment().localeData() to get the language configuration. Use moment().locale() to change languages.',
        function (key) {
            if (key === undefined) {
                return this.localeData();
            } else {
                return this.locale(key);
            }
        }
    );

    function localeData() {
        return this._locale;
    }

    var MS_PER_SECOND = 1000,
        MS_PER_MINUTE = 60 * MS_PER_SECOND,
        MS_PER_HOUR = 60 * MS_PER_MINUTE,
        MS_PER_400_YEARS = (365 * 400 + 97) * 24 * MS_PER_HOUR;

    // actual modulo - handles negative numbers (for dates before 1970):
    function mod$1(dividend, divisor) {
        return ((dividend % divisor) + divisor) % divisor;
    }

    function localStartOfDate(y, m, d) {
        // the date constructor remaps years 0-99 to 1900-1999
        if (y < 100 && y >= 0) {
            // preserve leap years using a full 400 year cycle, then reset
            return new Date(y + 400, m, d) - MS_PER_400_YEARS;
        } else {
            return new Date(y, m, d).valueOf();
        }
    }

    function utcStartOfDate(y, m, d) {
        // Date.UTC remaps years 0-99 to 1900-1999
        if (y < 100 && y >= 0) {
            // preserve leap years using a full 400 year cycle, then reset
            return Date.UTC(y + 400, m, d) - MS_PER_400_YEARS;
        } else {
            return Date.UTC(y, m, d);
        }
    }

    function startOf(units) {
        var time, startOfDate;
        units = normalizeUnits(units);
        if (units === undefined || units === 'millisecond' || !this.isValid()) {
            return this;
        }

        startOfDate = this._isUTC ? utcStartOfDate : localStartOfDate;

        switch (units) {
            case 'year':
                time = startOfDate(this.year(), 0, 1);
                break;
            case 'quarter':
                time = startOfDate(
                    this.year(),
                    this.month() - (this.month() % 3),
                    1
                );
                break;
            case 'month':
                time = startOfDate(this.year(), this.month(), 1);
                break;
            case 'week':
                time = startOfDate(
                    this.year(),
                    this.month(),
                    this.date() - this.weekday()
                );
                break;
            case 'isoWeek':
                time = startOfDate(
                    this.year(),
                    this.month(),
                    this.date() - (this.isoWeekday() - 1)
                );
                break;
            case 'day':
            case 'date':
                time = startOfDate(this.year(), this.month(), this.date());
                break;
            case 'hour':
                time = this._d.valueOf();
                time -= mod$1(
                    time + (this._isUTC ? 0 : this.utcOffset() * MS_PER_MINUTE),
                    MS_PER_HOUR
                );
                break;
            case 'minute':
                time = this._d.valueOf();
                time -= mod$1(time, MS_PER_MINUTE);
                break;
            case 'second':
                time = this._d.valueOf();
                time -= mod$1(time, MS_PER_SECOND);
                break;
        }

        this._d.setTime(time);
        hooks.updateOffset(this, true);
        return this;
    }

    function endOf(units) {
        var time, startOfDate;
        units = normalizeUnits(units);
        if (units === undefined || units === 'millisecond' || !this.isValid()) {
            return this;
        }

        startOfDate = this._isUTC ? utcStartOfDate : localStartOfDate;

        switch (units) {
            case 'year':
                time = startOfDate(this.year() + 1, 0, 1) - 1;
                break;
            case 'quarter':
                time =
                    startOfDate(
                        this.year(),
                        this.month() - (this.month() % 3) + 3,
                        1
                    ) - 1;
                break;
            case 'month':
                time = startOfDate(this.year(), this.month() + 1, 1) - 1;
                break;
            case 'week':
                time =
                    startOfDate(
                        this.year(),
                        this.month(),
                        this.date() - this.weekday() + 7
                    ) - 1;
                break;
            case 'isoWeek':
                time =
                    startOfDate(
                        this.year(),
                        this.month(),
                        this.date() - (this.isoWeekday() - 1) + 7
                    ) - 1;
                break;
            case 'day':
            case 'date':
                time = startOfDate(this.year(), this.month(), this.date() + 1) - 1;
                break;
            case 'hour':
                time = this._d.valueOf();
                time +=
                    MS_PER_HOUR -
                    mod$1(
                        time + (this._isUTC ? 0 : this.utcOffset() * MS_PER_MINUTE),
                        MS_PER_HOUR
                    ) -
                    1;
                break;
            case 'minute':
                time = this._d.valueOf();
                time += MS_PER_MINUTE - mod$1(time, MS_PER_MINUTE) - 1;
                break;
            case 'second':
                time = this._d.valueOf();
                time += MS_PER_SECOND - mod$1(time, MS_PER_SECOND) - 1;
                break;
        }

        this._d.setTime(time);
        hooks.updateOffset(this, true);
        return this;
    }

    function valueOf() {
        return this._d.valueOf() - (this._offset || 0) * 60000;
    }

    function unix() {
        return Math.floor(this.valueOf() / 1000);
    }

    function toDate() {
        return new Date(this.valueOf());
    }

    function toArray() {
        var m = this;
        return [
            m.year(),
            m.month(),
            m.date(),
            m.hour(),
            m.minute(),
            m.second(),
            m.millisecond(),
        ];
    }

    function toObject() {
        var m = this;
        return {
            years: m.year(),
            months: m.month(),
            date: m.date(),
            hours: m.hours(),
            minutes: m.minutes(),
            seconds: m.seconds(),
            milliseconds: m.milliseconds(),
        };
    }

    function toJSON() {
        // new Date(NaN).toJSON() === null
        return this.isValid() ? this.toISOString() : null;
    }

    function isValid$2() {
        return isValid(this);
    }

    function parsingFlags() {
        return extend({}, getParsingFlags(this));
    }

    function invalidAt() {
        return getParsingFlags(this).overflow;
    }

    function creationData() {
        return {
            input: this._i,
            format: this._f,
            locale: this._locale,
            isUTC: this._isUTC,
            strict: this._strict,
        };
    }

    addFormatToken('N', 0, 0, 'eraAbbr');
    addFormatToken('NN', 0, 0, 'eraAbbr');
    addFormatToken('NNN', 0, 0, 'eraAbbr');
    addFormatToken('NNNN', 0, 0, 'eraName');
    addFormatToken('NNNNN', 0, 0, 'eraNarrow');

    addFormatToken('y', ['y', 1], 'yo', 'eraYear');
    addFormatToken('y', ['yy', 2], 0, 'eraYear');
    addFormatToken('y', ['yyy', 3], 0, 'eraYear');
    addFormatToken('y', ['yyyy', 4], 0, 'eraYear');

    addRegexToken('N', matchEraAbbr);
    addRegexToken('NN', matchEraAbbr);
    addRegexToken('NNN', matchEraAbbr);
    addRegexToken('NNNN', matchEraName);
    addRegexToken('NNNNN', matchEraNarrow);

    addParseToken(['N', 'NN', 'NNN', 'NNNN', 'NNNNN'], function (
        input,
        array,
        config,
        token
    ) {
        var era = config._locale.erasParse(input, token, config._strict);
        if (era) {
            getParsingFlags(config).era = era;
        } else {
            getParsingFlags(config).invalidEra = input;
        }
    });

    addRegexToken('y', matchUnsigned);
    addRegexToken('yy', matchUnsigned);
    addRegexToken('yyy', matchUnsigned);
    addRegexToken('yyyy', matchUnsigned);
    addRegexToken('yo', matchEraYearOrdinal);

    addParseToken(['y', 'yy', 'yyy', 'yyyy'], YEAR);
    addParseToken(['yo'], function (input, array, config, token) {
        var match;
        if (config._locale._eraYearOrdinalRegex) {
            match = input.match(config._locale._eraYearOrdinalRegex);
        }

        if (config._locale.eraYearOrdinalParse) {
            array[YEAR] = config._locale.eraYearOrdinalParse(input, match);
        } else {
            array[YEAR] = parseInt(input, 10);
        }
    });

    function localeEras(m, format) {
        var i,
            l,
            date,
            eras = this._eras || getLocale('en')._eras;
        for (i = 0, l = eras.length; i < l; ++i) {
            switch (typeof eras[i].since) {
                case 'string':
                    // truncate time
                    date = hooks(eras[i].since).startOf('day');
                    eras[i].since = date.valueOf();
                    break;
            }

            switch (typeof eras[i].until) {
                case 'undefined':
                    eras[i].until = +Infinity;
                    break;
                case 'string':
                    // truncate time
                    date = hooks(eras[i].until).startOf('day').valueOf();
                    eras[i].until = date.valueOf();
                    break;
            }
        }
        return eras;
    }

    function localeErasParse(eraName, format, strict) {
        var i,
            l,
            eras = this.eras(),
            name,
            abbr,
            narrow;
        eraName = eraName.toUpperCase();

        for (i = 0, l = eras.length; i < l; ++i) {
            name = eras[i].name.toUpperCase();
            abbr = eras[i].abbr.toUpperCase();
            narrow = eras[i].narrow.toUpperCase();

            if (strict) {
                switch (format) {
                    case 'N':
                    case 'NN':
                    case 'NNN':
                        if (abbr === eraName) {
                            return eras[i];
                        }
                        break;

                    case 'NNNN':
                        if (name === eraName) {
                            return eras[i];
                        }
                        break;

                    case 'NNNNN':
                        if (narrow === eraName) {
                            return eras[i];
                        }
                        break;
                }
            } else if ([name, abbr, narrow].indexOf(eraName) >= 0) {
                return eras[i];
            }
        }
    }

    function localeErasConvertYear(era, year) {
        var dir = era.since <= era.until ? +1 : -1;
        if (year === undefined) {
            return hooks(era.since).year();
        } else {
            return hooks(era.since).year() + (year - era.offset) * dir;
        }
    }

    function getEraName() {
        var i,
            l,
            val,
            eras = this.localeData().eras();
        for (i = 0, l = eras.length; i < l; ++i) {
            // truncate time
            val = this.clone().startOf('day').valueOf();

            if (eras[i].since <= val && val <= eras[i].until) {
                return eras[i].name;
            }
            if (eras[i].until <= val && val <= eras[i].since) {
                return eras[i].name;
            }
        }

        return '';
    }

    function getEraNarrow() {
        var i,
            l,
            val,
            eras = this.localeData().eras();
        for (i = 0, l = eras.length; i < l; ++i) {
            // truncate time
            val = this.clone().startOf('day').valueOf();

            if (eras[i].since <= val && val <= eras[i].until) {
                return eras[i].narrow;
            }
            if (eras[i].until <= val && val <= eras[i].since) {
                return eras[i].narrow;
            }
        }

        return '';
    }

    function getEraAbbr() {
        var i,
            l,
            val,
            eras = this.localeData().eras();
        for (i = 0, l = eras.length; i < l; ++i) {
            // truncate time
            val = this.clone().startOf('day').valueOf();

            if (eras[i].since <= val && val <= eras[i].until) {
                return eras[i].abbr;
            }
            if (eras[i].until <= val && val <= eras[i].since) {
                return eras[i].abbr;
            }
        }

        return '';
    }

    function getEraYear() {
        var i,
            l,
            dir,
            val,
            eras = this.localeData().eras();
        for (i = 0, l = eras.length; i < l; ++i) {
            dir = eras[i].since <= eras[i].until ? +1 : -1;

            // truncate time
            val = this.clone().startOf('day').valueOf();

            if (
                (eras[i].since <= val && val <= eras[i].until) ||
                (eras[i].until <= val && val <= eras[i].since)
            ) {
                return (
                    (this.year() - hooks(eras[i].since).year()) * dir +
                    eras[i].offset
                );
            }
        }

        return this.year();
    }

    function erasNameRegex(isStrict) {
        if (!hasOwnProp(this, '_erasNameRegex')) {
            computeErasParse.call(this);
        }
        return isStrict ? this._erasNameRegex : this._erasRegex;
    }

    function erasAbbrRegex(isStrict) {
        if (!hasOwnProp(this, '_erasAbbrRegex')) {
            computeErasParse.call(this);
        }
        return isStrict ? this._erasAbbrRegex : this._erasRegex;
    }

    function erasNarrowRegex(isStrict) {
        if (!hasOwnProp(this, '_erasNarrowRegex')) {
            computeErasParse.call(this);
        }
        return isStrict ? this._erasNarrowRegex : this._erasRegex;
    }

    function matchEraAbbr(isStrict, locale) {
        return locale.erasAbbrRegex(isStrict);
    }

    function matchEraName(isStrict, locale) {
        return locale.erasNameRegex(isStrict);
    }

    function matchEraNarrow(isStrict, locale) {
        return locale.erasNarrowRegex(isStrict);
    }

    function matchEraYearOrdinal(isStrict, locale) {
        return locale._eraYearOrdinalRegex || matchUnsigned;
    }

    function computeErasParse() {
        var abbrPieces = [],
            namePieces = [],
            narrowPieces = [],
            mixedPieces = [],
            i,
            l,
            eras = this.eras();

        for (i = 0, l = eras.length; i < l; ++i) {
            namePieces.push(regexEscape(eras[i].name));
            abbrPieces.push(regexEscape(eras[i].abbr));
            narrowPieces.push(regexEscape(eras[i].narrow));

            mixedPieces.push(regexEscape(eras[i].name));
            mixedPieces.push(regexEscape(eras[i].abbr));
            mixedPieces.push(regexEscape(eras[i].narrow));
        }

        this._erasRegex = new RegExp('^(' + mixedPieces.join('|') + ')', 'i');
        this._erasNameRegex = new RegExp('^(' + namePieces.join('|') + ')', 'i');
        this._erasAbbrRegex = new RegExp('^(' + abbrPieces.join('|') + ')', 'i');
        this._erasNarrowRegex = new RegExp(
            '^(' + narrowPieces.join('|') + ')',
            'i'
        );
    }

    // FORMATTING

    addFormatToken(0, ['gg', 2], 0, function () {
        return this.weekYear() % 100;
    });

    addFormatToken(0, ['GG', 2], 0, function () {
        return this.isoWeekYear() % 100;
    });

    function addWeekYearFormatToken(token, getter) {
        addFormatToken(0, [token, token.length], 0, getter);
    }

    addWeekYearFormatToken('gggg', 'weekYear');
    addWeekYearFormatToken('ggggg', 'weekYear');
    addWeekYearFormatToken('GGGG', 'isoWeekYear');
    addWeekYearFormatToken('GGGGG', 'isoWeekYear');

    // ALIASES

    addUnitAlias('weekYear', 'gg');
    addUnitAlias('isoWeekYear', 'GG');

    // PRIORITY

    addUnitPriority('weekYear', 1);
    addUnitPriority('isoWeekYear', 1);

    // PARSING

    addRegexToken('G', matchSigned);
    addRegexToken('g', matchSigned);
    addRegexToken('GG', match1to2, match2);
    addRegexToken('gg', match1to2, match2);
    addRegexToken('GGGG', match1to4, match4);
    addRegexToken('gggg', match1to4, match4);
    addRegexToken('GGGGG', match1to6, match6);
    addRegexToken('ggggg', match1to6, match6);

    addWeekParseToken(['gggg', 'ggggg', 'GGGG', 'GGGGG'], function (
        input,
        week,
        config,
        token
    ) {
        week[token.substr(0, 2)] = toInt(input);
    });

    addWeekParseToken(['gg', 'GG'], function (input, week, config, token) {
        week[token] = hooks.parseTwoDigitYear(input);
    });

    // MOMENTS

    function getSetWeekYear(input) {
        return getSetWeekYearHelper.call(
            this,
            input,
            this.week(),
            this.weekday(),
            this.localeData()._week.dow,
            this.localeData()._week.doy
        );
    }

    function getSetISOWeekYear(input) {
        return getSetWeekYearHelper.call(
            this,
            input,
            this.isoWeek(),
            this.isoWeekday(),
            1,
            4
        );
    }

    function getISOWeeksInYear() {
        return weeksInYear(this.year(), 1, 4);
    }

    function getISOWeeksInISOWeekYear() {
        return weeksInYear(this.isoWeekYear(), 1, 4);
    }

    function getWeeksInYear() {
        var weekInfo = this.localeData()._week;
        return weeksInYear(this.year(), weekInfo.dow, weekInfo.doy);
    }

    function getWeeksInWeekYear() {
        var weekInfo = this.localeData()._week;
        return weeksInYear(this.weekYear(), weekInfo.dow, weekInfo.doy);
    }

    function getSetWeekYearHelper(input, week, weekday, dow, doy) {
        var weeksTarget;
        if (input == null) {
            return weekOfYear(this, dow, doy).year;
        } else {
            weeksTarget = weeksInYear(input, dow, doy);
            if (week > weeksTarget) {
                week = weeksTarget;
            }
            return setWeekAll.call(this, input, week, weekday, dow, doy);
        }
    }

    function setWeekAll(weekYear, week, weekday, dow, doy) {
        var dayOfYearData = dayOfYearFromWeeks(weekYear, week, weekday, dow, doy),
            date = createUTCDate(dayOfYearData.year, 0, dayOfYearData.dayOfYear);

        this.year(date.getUTCFullYear());
        this.month(date.getUTCMonth());
        this.date(date.getUTCDate());
        return this;
    }

    // FORMATTING

    addFormatToken('Q', 0, 'Qo', 'quarter');

    // ALIASES

    addUnitAlias('quarter', 'Q');

    // PRIORITY

    addUnitPriority('quarter', 7);

    // PARSING

    addRegexToken('Q', match1);
    addParseToken('Q', function (input, array) {
        array[MONTH] = (toInt(input) - 1) * 3;
    });

    // MOMENTS

    function getSetQuarter(input) {
        return input == null
            ? Math.ceil((this.month() + 1) / 3)
            : this.month((input - 1) * 3 + (this.month() % 3));
    }

    // FORMATTING

    addFormatToken('D', ['DD', 2], 'Do', 'date');

    // ALIASES

    addUnitAlias('date', 'D');

    // PRIORITY
    addUnitPriority('date', 9);

    // PARSING

    addRegexToken('D', match1to2);
    addRegexToken('DD', match1to2, match2);
    addRegexToken('Do', function (isStrict, locale) {
        // TODO: Remove "ordinalParse" fallback in next major release.
        return isStrict
            ? locale._dayOfMonthOrdinalParse || locale._ordinalParse
            : locale._dayOfMonthOrdinalParseLenient;
    });

    addParseToken(['D', 'DD'], DATE);
    addParseToken('Do', function (input, array) {
        array[DATE] = toInt(input.match(match1to2)[0]);
    });

    // MOMENTS

    var getSetDayOfMonth = makeGetSet('Date', true);

    // FORMATTING

    addFormatToken('DDD', ['DDDD', 3], 'DDDo', 'dayOfYear');

    // ALIASES

    addUnitAlias('dayOfYear', 'DDD');

    // PRIORITY
    addUnitPriority('dayOfYear', 4);

    // PARSING

    addRegexToken('DDD', match1to3);
    addRegexToken('DDDD', match3);
    addParseToken(['DDD', 'DDDD'], function (input, array, config) {
        config._dayOfYear = toInt(input);
    });

    // HELPERS

    // MOMENTS

    function getSetDayOfYear(input) {
        var dayOfYear =
            Math.round(
                (this.clone().startOf('day') - this.clone().startOf('year')) / 864e5
            ) + 1;
        return input == null ? dayOfYear : this.add(input - dayOfYear, 'd');
    }

    // FORMATTING

    addFormatToken('m', ['mm', 2], 0, 'minute');

    // ALIASES

    addUnitAlias('minute', 'm');

    // PRIORITY

    addUnitPriority('minute', 14);

    // PARSING

    addRegexToken('m', match1to2);
    addRegexToken('mm', match1to2, match2);
    addParseToken(['m', 'mm'], MINUTE);

    // MOMENTS

    var getSetMinute = makeGetSet('Minutes', false);

    // FORMATTING

    addFormatToken('s', ['ss', 2], 0, 'second');

    // ALIASES

    addUnitAlias('second', 's');

    // PRIORITY

    addUnitPriority('second', 15);

    // PARSING

    addRegexToken('s', match1to2);
    addRegexToken('ss', match1to2, match2);
    addParseToken(['s', 'ss'], SECOND);

    // MOMENTS

    var getSetSecond = makeGetSet('Seconds', false);

    // FORMATTING

    addFormatToken('S', 0, 0, function () {
        return ~~(this.millisecond() / 100);
    });

    addFormatToken(0, ['SS', 2], 0, function () {
        return ~~(this.millisecond() / 10);
    });

    addFormatToken(0, ['SSS', 3], 0, 'millisecond');
    addFormatToken(0, ['SSSS', 4], 0, function () {
        return this.millisecond() * 10;
    });
    addFormatToken(0, ['SSSSS', 5], 0, function () {
        return this.millisecond() * 100;
    });
    addFormatToken(0, ['SSSSSS', 6], 0, function () {
        return this.millisecond() * 1000;
    });
    addFormatToken(0, ['SSSSSSS', 7], 0, function () {
        return this.millisecond() * 10000;
    });
    addFormatToken(0, ['SSSSSSSS', 8], 0, function () {
        return this.millisecond() * 100000;
    });
    addFormatToken(0, ['SSSSSSSSS', 9], 0, function () {
        return this.millisecond() * 1000000;
    });

    // ALIASES

    addUnitAlias('millisecond', 'ms');

    // PRIORITY

    addUnitPriority('millisecond', 16);

    // PARSING

    addRegexToken('S', match1to3, match1);
    addRegexToken('SS', match1to3, match2);
    addRegexToken('SSS', match1to3, match3);

    var token, getSetMillisecond;
    for (token = 'SSSS'; token.length <= 9; token += 'S') {
        addRegexToken(token, matchUnsigned);
    }

    function parseMs(input, array) {
        array[MILLISECOND] = toInt(('0.' + input) * 1000);
    }

    for (token = 'S'; token.length <= 9; token += 'S') {
        addParseToken(token, parseMs);
    }

    getSetMillisecond = makeGetSet('Milliseconds', false);

    // FORMATTING

    addFormatToken('z', 0, 0, 'zoneAbbr');
    addFormatToken('zz', 0, 0, 'zoneName');

    // MOMENTS

    function getZoneAbbr() {
        return this._isUTC ? 'UTC' : '';
    }

    function getZoneName() {
        return this._isUTC ? 'Coordinated Universal Time' : '';
    }

    var proto = Moment.prototype;

    proto.add = add;
    proto.calendar = calendar$1;
    proto.clone = clone;
    proto.diff = diff;
    proto.endOf = endOf;
    proto.format = format;
    proto.from = from;
    proto.fromNow = fromNow;
    proto.to = to;
    proto.toNow = toNow;
    proto.get = stringGet;
    proto.invalidAt = invalidAt;
    proto.isAfter = isAfter;
    proto.isBefore = isBefore;
    proto.isBetween = isBetween;
    proto.isSame = isSame;
    proto.isSameOrAfter = isSameOrAfter;
    proto.isSameOrBefore = isSameOrBefore;
    proto.isValid = isValid$2;
    proto.lang = lang;
    proto.locale = locale;
    proto.localeData = localeData;
    proto.max = prototypeMax;
    proto.min = prototypeMin;
    proto.parsingFlags = parsingFlags;
    proto.set = stringSet;
    proto.startOf = startOf;
    proto.subtract = subtract;
    proto.toArray = toArray;
    proto.toObject = toObject;
    proto.toDate = toDate;
    proto.toISOString = toISOString;
    proto.inspect = inspect;
    if (typeof Symbol !== 'undefined' && Symbol.for != null) {
        proto[Symbol.for('nodejs.util.inspect.custom')] = function () {
            return 'Moment<' + this.format() + '>';
        };
    }
    proto.toJSON = toJSON;
    proto.toString = toString;
    proto.unix = unix;
    proto.valueOf = valueOf;
    proto.creationData = creationData;
    proto.eraName = getEraName;
    proto.eraNarrow = getEraNarrow;
    proto.eraAbbr = getEraAbbr;
    proto.eraYear = getEraYear;
    proto.year = getSetYear;
    proto.isLeapYear = getIsLeapYear;
    proto.weekYear = getSetWeekYear;
    proto.isoWeekYear = getSetISOWeekYear;
    proto.quarter = proto.quarters = getSetQuarter;
    proto.month = getSetMonth;
    proto.daysInMonth = getDaysInMonth;
    proto.week = proto.weeks = getSetWeek;
    proto.isoWeek = proto.isoWeeks = getSetISOWeek;
    proto.weeksInYear = getWeeksInYear;
    proto.weeksInWeekYear = getWeeksInWeekYear;
    proto.isoWeeksInYear = getISOWeeksInYear;
    proto.isoWeeksInISOWeekYear = getISOWeeksInISOWeekYear;
    proto.date = getSetDayOfMonth;
    proto.day = proto.days = getSetDayOfWeek;
    proto.weekday = getSetLocaleDayOfWeek;
    proto.isoWeekday = getSetISODayOfWeek;
    proto.dayOfYear = getSetDayOfYear;
    proto.hour = proto.hours = getSetHour;
    proto.minute = proto.minutes = getSetMinute;
    proto.second = proto.seconds = getSetSecond;
    proto.millisecond = proto.milliseconds = getSetMillisecond;
    proto.utcOffset = getSetOffset;
    proto.utc = setOffsetToUTC;
    proto.local = setOffsetToLocal;
    proto.parseZone = setOffsetToParsedOffset;
    proto.hasAlignedHourOffset = hasAlignedHourOffset;
    proto.isDST = isDaylightSavingTime;
    proto.isLocal = isLocal;
    proto.isUtcOffset = isUtcOffset;
    proto.isUtc = isUtc;
    proto.isUTC = isUtc;
    proto.zoneAbbr = getZoneAbbr;
    proto.zoneName = getZoneName;
    proto.dates = deprecate(
        'dates accessor is deprecated. Use date instead.',
        getSetDayOfMonth
    );
    proto.months = deprecate(
        'months accessor is deprecated. Use month instead',
        getSetMonth
    );
    proto.years = deprecate(
        'years accessor is deprecated. Use year instead',
        getSetYear
    );
    proto.zone = deprecate(
        'moment().zone is deprecated, use moment().utcOffset instead. http://momentjs.com/guides/#/warnings/zone/',
        getSetZone
    );
    proto.isDSTShifted = deprecate(
        'isDSTShifted is deprecated. See http://momentjs.com/guides/#/warnings/dst-shifted/ for more information',
        isDaylightSavingTimeShifted
    );

    function createUnix(input) {
        return createLocal(input * 1000);
    }

    function createInZone() {
        return createLocal.apply(null, arguments).parseZone();
    }

    function preParsePostFormat(string) {
        return string;
    }

    var proto$1 = Locale.prototype;

    proto$1.calendar = calendar;
    proto$1.longDateFormat = longDateFormat;
    proto$1.invalidDate = invalidDate;
    proto$1.ordinal = ordinal;
    proto$1.preparse = preParsePostFormat;
    proto$1.postformat = preParsePostFormat;
    proto$1.relativeTime = relativeTime;
    proto$1.pastFuture = pastFuture;
    proto$1.set = set;
    proto$1.eras = localeEras;
    proto$1.erasParse = localeErasParse;
    proto$1.erasConvertYear = localeErasConvertYear;
    proto$1.erasAbbrRegex = erasAbbrRegex;
    proto$1.erasNameRegex = erasNameRegex;
    proto$1.erasNarrowRegex = erasNarrowRegex;

    proto$1.months = localeMonths;
    proto$1.monthsShort = localeMonthsShort;
    proto$1.monthsParse = localeMonthsParse;
    proto$1.monthsRegex = monthsRegex;
    proto$1.monthsShortRegex = monthsShortRegex;
    proto$1.week = localeWeek;
    proto$1.firstDayOfYear = localeFirstDayOfYear;
    proto$1.firstDayOfWeek = localeFirstDayOfWeek;

    proto$1.weekdays = localeWeekdays;
    proto$1.weekdaysMin = localeWeekdaysMin;
    proto$1.weekdaysShort = localeWeekdaysShort;
    proto$1.weekdaysParse = localeWeekdaysParse;

    proto$1.weekdaysRegex = weekdaysRegex;
    proto$1.weekdaysShortRegex = weekdaysShortRegex;
    proto$1.weekdaysMinRegex = weekdaysMinRegex;

    proto$1.isPM = localeIsPM;
    proto$1.meridiem = localeMeridiem;

    function get$1(format, index, field, setter) {
        var locale = getLocale(),
            utc = createUTC().set(setter, index);
        return locale[field](utc, format);
    }

    function listMonthsImpl(format, index, field) {
        if (isNumber(format)) {
            index = format;
            format = undefined;
        }

        format = format || '';

        if (index != null) {
            return get$1(format, index, field, 'month');
        }

        var i,
            out = [];
        for (i = 0; i < 12; i++) {
            out[i] = get$1(format, i, field, 'month');
        }
        return out;
    }

    // ()
    // (5)
    // (fmt, 5)
    // (fmt)
    // (true)
    // (true, 5)
    // (true, fmt, 5)
    // (true, fmt)
    function listWeekdaysImpl(localeSorted, format, index, field) {
        if (typeof localeSorted === 'boolean') {
            if (isNumber(format)) {
                index = format;
                format = undefined;
            }

            format = format || '';
        } else {
            format = localeSorted;
            index = format;
            localeSorted = false;

            if (isNumber(format)) {
                index = format;
                format = undefined;
            }

            format = format || '';
        }

        var locale = getLocale(),
            shift = localeSorted ? locale._week.dow : 0,
            i,
            out = [];

        if (index != null) {
            return get$1(format, (index + shift) % 7, field, 'day');
        }

        for (i = 0; i < 7; i++) {
            out[i] = get$1(format, (i + shift) % 7, field, 'day');
        }
        return out;
    }

    function listMonths(format, index) {
        return listMonthsImpl(format, index, 'months');
    }

    function listMonthsShort(format, index) {
        return listMonthsImpl(format, index, 'monthsShort');
    }

    function listWeekdays(localeSorted, format, index) {
        return listWeekdaysImpl(localeSorted, format, index, 'weekdays');
    }

    function listWeekdaysShort(localeSorted, format, index) {
        return listWeekdaysImpl(localeSorted, format, index, 'weekdaysShort');
    }

    function listWeekdaysMin(localeSorted, format, index) {
        return listWeekdaysImpl(localeSorted, format, index, 'weekdaysMin');
    }

    getSetGlobalLocale('en', {
        eras: [
            {
                since: '0001-01-01',
                until: +Infinity,
                offset: 1,
                name: 'Anno Domini',
                narrow: 'AD',
                abbr: 'AD',
            },
            {
                since: '0000-12-31',
                until: -Infinity,
                offset: 1,
                name: 'Before Christ',
                narrow: 'BC',
                abbr: 'BC',
            },
        ],
        dayOfMonthOrdinalParse: /\d{1,2}(th|st|nd|rd)/,
        ordinal: function (number) {
            var b = number % 10,
                output =
                    toInt((number % 100) / 10) === 1
                        ? 'th'
                        : b === 1
                        ? 'st'
                        : b === 2
                        ? 'nd'
                        : b === 3
                        ? 'rd'
                        : 'th';
            return number + output;
        },
    });

    // Side effect imports

    hooks.lang = deprecate(
        'moment.lang is deprecated. Use moment.locale instead.',
        getSetGlobalLocale
    );
    hooks.langData = deprecate(
        'moment.langData is deprecated. Use moment.localeData instead.',
        getLocale
    );

    var mathAbs = Math.abs;

    function abs() {
        var data = this._data;

        this._milliseconds = mathAbs(this._milliseconds);
        this._days = mathAbs(this._days);
        this._months = mathAbs(this._months);

        data.milliseconds = mathAbs(data.milliseconds);
        data.seconds = mathAbs(data.seconds);
        data.minutes = mathAbs(data.minutes);
        data.hours = mathAbs(data.hours);
        data.months = mathAbs(data.months);
        data.years = mathAbs(data.years);

        return this;
    }

    function addSubtract$1(duration, input, value, direction) {
        var other = createDuration(input, value);

        duration._milliseconds += direction * other._milliseconds;
        duration._days += direction * other._days;
        duration._months += direction * other._months;

        return duration._bubble();
    }

    // supports only 2.0-style add(1, 's') or add(duration)
    function add$1(input, value) {
        return addSubtract$1(this, input, value, 1);
    }

    // supports only 2.0-style subtract(1, 's') or subtract(duration)
    function subtract$1(input, value) {
        return addSubtract$1(this, input, value, -1);
    }

    function absCeil(number) {
        if (number < 0) {
            return Math.floor(number);
        } else {
            return Math.ceil(number);
        }
    }

    function bubble() {
        var milliseconds = this._milliseconds,
            days = this._days,
            months = this._months,
            data = this._data,
            seconds,
            minutes,
            hours,
            years,
            monthsFromDays;

        // if we have a mix of positive and negative values, bubble down first
        // check: https://github.com/moment/moment/issues/2166
        if (
            !(
                (milliseconds >= 0 && days >= 0 && months >= 0) ||
                (milliseconds <= 0 && days <= 0 && months <= 0)
            )
        ) {
            milliseconds += absCeil(monthsToDays(months) + days) * 864e5;
            days = 0;
            months = 0;
        }

        // The following code bubbles up values, see the tests for
        // examples of what that means.
        data.milliseconds = milliseconds % 1000;

        seconds = absFloor(milliseconds / 1000);
        data.seconds = seconds % 60;

        minutes = absFloor(seconds / 60);
        data.minutes = minutes % 60;

        hours = absFloor(minutes / 60);
        data.hours = hours % 24;

        days += absFloor(hours / 24);

        // convert days to months
        monthsFromDays = absFloor(daysToMonths(days));
        months += monthsFromDays;
        days -= absCeil(monthsToDays(monthsFromDays));

        // 12 months -> 1 year
        years = absFloor(months / 12);
        months %= 12;

        data.days = days;
        data.months = months;
        data.years = years;

        return this;
    }

    function daysToMonths(days) {
        // 400 years have 146097 days (taking into account leap year rules)
        // 400 years have 12 months === 4800
        return (days * 4800) / 146097;
    }

    function monthsToDays(months) {
        // the reverse of daysToMonths
        return (months * 146097) / 4800;
    }

    function as(units) {
        if (!this.isValid()) {
            return NaN;
        }
        var days,
            months,
            milliseconds = this._milliseconds;

        units = normalizeUnits(units);

        if (units === 'month' || units === 'quarter' || units === 'year') {
            days = this._days + milliseconds / 864e5;
            months = this._months + daysToMonths(days);
            switch (units) {
                case 'month':
                    return months;
                case 'quarter':
                    return months / 3;
                case 'year':
                    return months / 12;
            }
        } else {
            // handle milliseconds separately because of floating point math errors (issue #1867)
            days = this._days + Math.round(monthsToDays(this._months));
            switch (units) {
                case 'week':
                    return days / 7 + milliseconds / 6048e5;
                case 'day':
                    return days + milliseconds / 864e5;
                case 'hour':
                    return days * 24 + milliseconds / 36e5;
                case 'minute':
                    return days * 1440 + milliseconds / 6e4;
                case 'second':
                    return days * 86400 + milliseconds / 1000;
                // Math.floor prevents floating point math errors here
                case 'millisecond':
                    return Math.floor(days * 864e5) + milliseconds;
                default:
                    throw new Error('Unknown unit ' + units);
            }
        }
    }

    // TODO: Use this.as('ms')?
    function valueOf$1() {
        if (!this.isValid()) {
            return NaN;
        }
        return (
            this._milliseconds +
            this._days * 864e5 +
            (this._months % 12) * 2592e6 +
            toInt(this._months / 12) * 31536e6
        );
    }

    function makeAs(alias) {
        return function () {
            return this.as(alias);
        };
    }

    var asMilliseconds = makeAs('ms'),
        asSeconds = makeAs('s'),
        asMinutes = makeAs('m'),
        asHours = makeAs('h'),
        asDays = makeAs('d'),
        asWeeks = makeAs('w'),
        asMonths = makeAs('M'),
        asQuarters = makeAs('Q'),
        asYears = makeAs('y');

    function clone$1() {
        return createDuration(this);
    }

    function get$2(units) {
        units = normalizeUnits(units);
        return this.isValid() ? this[units + 's']() : NaN;
    }

    function makeGetter(name) {
        return function () {
            return this.isValid() ? this._data[name] : NaN;
        };
    }

    var milliseconds = makeGetter('milliseconds'),
        seconds = makeGetter('seconds'),
        minutes = makeGetter('minutes'),
        hours = makeGetter('hours'),
        days = makeGetter('days'),
        months = makeGetter('months'),
        years = makeGetter('years');

    function weeks() {
        return absFloor(this.days() / 7);
    }

    var round = Math.round,
        thresholds = {
            ss: 44, // a few seconds to seconds
            s: 45, // seconds to minute
            m: 45, // minutes to hour
            h: 22, // hours to day
            d: 26, // days to month/week
            w: null, // weeks to month
            M: 11, // months to year
        };

    // helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
    function substituteTimeAgo(string, number, withoutSuffix, isFuture, locale) {
        return locale.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
    }

    function relativeTime$1(posNegDuration, withoutSuffix, thresholds, locale) {
        var duration = createDuration(posNegDuration).abs(),
            seconds = round(duration.as('s')),
            minutes = round(duration.as('m')),
            hours = round(duration.as('h')),
            days = round(duration.as('d')),
            months = round(duration.as('M')),
            weeks = round(duration.as('w')),
            years = round(duration.as('y')),
            a =
                (seconds <= thresholds.ss && ['s', seconds]) ||
                (seconds < thresholds.s && ['ss', seconds]) ||
                (minutes <= 1 && ['m']) ||
                (minutes < thresholds.m && ['mm', minutes]) ||
                (hours <= 1 && ['h']) ||
                (hours < thresholds.h && ['hh', hours]) ||
                (days <= 1 && ['d']) ||
                (days < thresholds.d && ['dd', days]);

        if (thresholds.w != null) {
            a =
                a ||
                (weeks <= 1 && ['w']) ||
                (weeks < thresholds.w && ['ww', weeks]);
        }
        a = a ||
            (months <= 1 && ['M']) ||
            (months < thresholds.M && ['MM', months]) ||
            (years <= 1 && ['y']) || ['yy', years];

        a[2] = withoutSuffix;
        a[3] = +posNegDuration > 0;
        a[4] = locale;
        return substituteTimeAgo.apply(null, a);
    }

    // This function allows you to set the rounding function for relative time strings
    function getSetRelativeTimeRounding(roundingFunction) {
        if (roundingFunction === undefined) {
            return round;
        }
        if (typeof roundingFunction === 'function') {
            round = roundingFunction;
            return true;
        }
        return false;
    }

    // This function allows you to set a threshold for relative time strings
    function getSetRelativeTimeThreshold(threshold, limit) {
        if (thresholds[threshold] === undefined) {
            return false;
        }
        if (limit === undefined) {
            return thresholds[threshold];
        }
        thresholds[threshold] = limit;
        if (threshold === 's') {
            thresholds.ss = limit - 1;
        }
        return true;
    }

    function humanize(argWithSuffix, argThresholds) {
        if (!this.isValid()) {
            return this.localeData().invalidDate();
        }

        var withSuffix = false,
            th = thresholds,
            locale,
            output;

        if (typeof argWithSuffix === 'object') {
            argThresholds = argWithSuffix;
            argWithSuffix = false;
        }
        if (typeof argWithSuffix === 'boolean') {
            withSuffix = argWithSuffix;
        }
        if (typeof argThresholds === 'object') {
            th = Object.assign({}, thresholds, argThresholds);
            if (argThresholds.s != null && argThresholds.ss == null) {
                th.ss = argThresholds.s - 1;
            }
        }

        locale = this.localeData();
        output = relativeTime$1(this, !withSuffix, th, locale);

        if (withSuffix) {
            output = locale.pastFuture(+this, output);
        }

        return locale.postformat(output);
    }

    var abs$1 = Math.abs;

    function sign(x) {
        return (x > 0) - (x < 0) || +x;
    }

    function toISOString$1() {
        // for ISO strings we do not use the normal bubbling rules:
        //  * milliseconds bubble up until they become hours
        //  * days do not bubble at all
        //  * months bubble up until they become years
        // This is because there is no context-free conversion between hours and days
        // (think of clock changes)
        // and also not between days and months (28-31 days per month)
        if (!this.isValid()) {
            return this.localeData().invalidDate();
        }

        var seconds = abs$1(this._milliseconds) / 1000,
            days = abs$1(this._days),
            months = abs$1(this._months),
            minutes,
            hours,
            years,
            s,
            total = this.asSeconds(),
            totalSign,
            ymSign,
            daysSign,
            hmsSign;

        if (!total) {
            // this is the same as C#'s (Noda) and python (isodate)...
            // but not other JS (goog.date)
            return 'P0D';
        }

        // 3600 seconds -> 60 minutes -> 1 hour
        minutes = absFloor(seconds / 60);
        hours = absFloor(minutes / 60);
        seconds %= 60;
        minutes %= 60;

        // 12 months -> 1 year
        years = absFloor(months / 12);
        months %= 12;

        // inspired by https://github.com/dordille/moment-isoduration/blob/master/moment.isoduration.js
        s = seconds ? seconds.toFixed(3).replace(/\.?0+$/, '') : '';

        totalSign = total < 0 ? '-' : '';
        ymSign = sign(this._months) !== sign(total) ? '-' : '';
        daysSign = sign(this._days) !== sign(total) ? '-' : '';
        hmsSign = sign(this._milliseconds) !== sign(total) ? '-' : '';

        return (
            totalSign +
            'P' +
            (years ? ymSign + years + 'Y' : '') +
            (months ? ymSign + months + 'M' : '') +
            (days ? daysSign + days + 'D' : '') +
            (hours || minutes || seconds ? 'T' : '') +
            (hours ? hmsSign + hours + 'H' : '') +
            (minutes ? hmsSign + minutes + 'M' : '') +
            (seconds ? hmsSign + s + 'S' : '')
        );
    }

    var proto$2 = Duration.prototype;

    proto$2.isValid = isValid$1;
    proto$2.abs = abs;
    proto$2.add = add$1;
    proto$2.subtract = subtract$1;
    proto$2.as = as;
    proto$2.asMilliseconds = asMilliseconds;
    proto$2.asSeconds = asSeconds;
    proto$2.asMinutes = asMinutes;
    proto$2.asHours = asHours;
    proto$2.asDays = asDays;
    proto$2.asWeeks = asWeeks;
    proto$2.asMonths = asMonths;
    proto$2.asQuarters = asQuarters;
    proto$2.asYears = asYears;
    proto$2.valueOf = valueOf$1;
    proto$2._bubble = bubble;
    proto$2.clone = clone$1;
    proto$2.get = get$2;
    proto$2.milliseconds = milliseconds;
    proto$2.seconds = seconds;
    proto$2.minutes = minutes;
    proto$2.hours = hours;
    proto$2.days = days;
    proto$2.weeks = weeks;
    proto$2.months = months;
    proto$2.years = years;
    proto$2.humanize = humanize;
    proto$2.toISOString = toISOString$1;
    proto$2.toString = toISOString$1;
    proto$2.toJSON = toISOString$1;
    proto$2.locale = locale;
    proto$2.localeData = localeData;

    proto$2.toIsoString = deprecate(
        'toIsoString() is deprecated. Please use toISOString() instead (notice the capitals)',
        toISOString$1
    );
    proto$2.lang = lang;

    // FORMATTING

    addFormatToken('X', 0, 0, 'unix');
    addFormatToken('x', 0, 0, 'valueOf');

    // PARSING

    addRegexToken('x', matchSigned);
    addRegexToken('X', matchTimestamp);
    addParseToken('X', function (input, array, config) {
        config._d = new Date(parseFloat(input) * 1000);
    });
    addParseToken('x', function (input, array, config) {
        config._d = new Date(toInt(input));
    });

    //! moment.js

    hooks.version = '2.29.1';

    setHookCallback(createLocal);

    hooks.fn = proto;
    hooks.min = min;
    hooks.max = max;
    hooks.now = now;
    hooks.utc = createUTC;
    hooks.unix = createUnix;
    hooks.months = listMonths;
    hooks.isDate = isDate;
    hooks.locale = getSetGlobalLocale;
    hooks.invalid = createInvalid;
    hooks.duration = createDuration;
    hooks.isMoment = isMoment;
    hooks.weekdays = listWeekdays;
    hooks.parseZone = createInZone;
    hooks.localeData = getLocale;
    hooks.isDuration = isDuration;
    hooks.monthsShort = listMonthsShort;
    hooks.weekdaysMin = listWeekdaysMin;
    hooks.defineLocale = defineLocale;
    hooks.updateLocale = updateLocale;
    hooks.locales = listLocales;
    hooks.weekdaysShort = listWeekdaysShort;
    hooks.normalizeUnits = normalizeUnits;
    hooks.relativeTimeRounding = getSetRelativeTimeRounding;
    hooks.relativeTimeThreshold = getSetRelativeTimeThreshold;
    hooks.calendarFormat = getCalendarFormat;
    hooks.prototype = proto;

    // currently HTML5 input type only supports 24-hour formats
    hooks.HTML5_FMT = {
        DATETIME_LOCAL: 'YYYY-MM-DDTHH:mm', // <input type="datetime-local" />
        DATETIME_LOCAL_SECONDS: 'YYYY-MM-DDTHH:mm:ss', // <input type="datetime-local" step="1" />
        DATETIME_LOCAL_MS: 'YYYY-MM-DDTHH:mm:ss.SSS', // <input type="datetime-local" step="0.001" />
        DATE: 'YYYY-MM-DD', // <input type="date" />
        TIME: 'HH:mm', // <input type="time" />
        TIME_SECONDS: 'HH:mm:ss', // <input type="time" step="1" />
        TIME_MS: 'HH:mm:ss.SSS', // <input type="time" step="0.001" />
        WEEK: 'GGGG-[W]WW', // <input type="week" />
        MONTH: 'YYYY-MM', // <input type="month" />
    };

    return hooks;

})));
}, "F:/z_bbh_repo/chess/elixir/dev/bbhverse/node_modules/moment");

let array8 = arrayUntyped,
    array16 = arrayUntyped,
    array32 = arrayUntyped,
    arrayLengthen = arrayLengthenUntyped,
    arrayWiden = arrayWidenUntyped;
if (typeof Uint8Array !== "undefined") {
  array8 = function(n) { return new Uint8Array(n); };
  array16 = function(n) { return new Uint16Array(n); };
  array32 = function(n) { return new Uint32Array(n); };

  arrayLengthen = function(array, length) {
    if (array.length >= length) return array;
    var copy = new array.constructor(length);
    copy.set(array);
    return copy;
  };

  arrayWiden = function(array, width) {
    var copy;
    switch (width) {
      case 16: copy = array16(array.length); break;
      case 32: copy = array32(array.length); break;
      default: throw new Error("invalid array width!");
    }
    copy.set(array);
    return copy;
  };
}

function arrayUntyped(n) {
  var array = new Array(n), i = -1;
  while (++i < n) array[i] = 0;
  return array;
}

function arrayLengthenUntyped(array, length) {
  var n = array.length;
  while (n < length) array[n++] = 0;
  return array;
}

function arrayWidenUntyped(array, width) {
  if (width > 32) throw new Error("invalid array width!");
  return array;
}

// An arbitrarily-wide array of bitmasks
function bitarray(n) {
  this.length = n;
  this.subarrays = 1;
  this.width = 8;
  this.masks = {
    0: 0
  };

  this[0] = array8(n);
}

bitarray.prototype.lengthen = function(n) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    this[i] = arrayLengthen(this[i], n);
  }
  this.length = n;
};

// Reserve a new bit index in the array, returns {offset, one}
bitarray.prototype.add = function() {
  var m, w, one, i, len;

  for (i = 0, len = this.subarrays; i < len; ++i) {
    m = this.masks[i];
    w = this.width - (32 * i);
    // isolate the rightmost zero bit and return it as an unsigned int of 32 bits, if NaN or -1, return a 0 
    one = (~m & (m + 1)) >>> 0;

    if (w >= 32 && !one) {
      continue;
    }

    if (w < 32 && (one & (1 << w))) {
      // widen this subarray
      this[i] = arrayWiden(this[i], w <<= 1);
      this.width = 32 * i + w;
    }

    this.masks[i] |= one;

    return {
      offset: i,
      one: one
    };
  }

  // add a new subarray
  this[this.subarrays] = array8(this.length);
  this.masks[this.subarrays] = 1;
  this.width += 8;
  return {
    offset: this.subarrays++,
    one: 1
  };
};

// Copy record from index src to index dest
bitarray.prototype.copy = function(dest, src) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    this[i][dest] = this[i][src];
  }
};

// Truncate the array to the given length
bitarray.prototype.truncate = function(n) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    for (var j = this.length - 1; j >= n; j--) {
      this[i][j] = 0;
    }
  }
  this.length = n;
};

// Checks that all bits for the given index are 0
bitarray.prototype.zero = function(n) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    if (this[i][n]) {
      return false;
    }
  }
  return true;
};

// Checks that all bits for the given index are 0 except for possibly one
bitarray.prototype.zeroExcept = function(n, offset, zero) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    if (i === offset ? this[i][n] & zero : this[i][n]) {
      return false;
    }
  }
  return true;
};

// Checks that all bits for the given index are 0 except for the specified mask.
// The mask should be an array of the same size as the filter subarrays width.
bitarray.prototype.zeroExceptMask = function(n, mask) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    if (this[i][n] & mask[i]) {
      return false;
    }
  }
  return true;
};

// Checks that only the specified bit is set for the given index
bitarray.prototype.only = function(n, offset, one) {
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    if (this[i][n] != (i === offset ? one : 0)) {
      return false;
    }
  }
  return true;
};

// Checks that only the specified bit is set for the given index except for possibly one other
bitarray.prototype.onlyExcept = function(n, offset, zero, onlyOffset, onlyOne) {
  var mask;
  var i, len;
  for (i = 0, len = this.subarrays; i < len; ++i) {
    mask = this[i][n];
    if (i === offset)
      mask = (mask & zero) >>> 0;
    if (mask != (i === onlyOffset ? onlyOne : 0)) {
      return false;
    }
  }
  return true;
};

var xfilterArray = {
  array8: arrayUntyped,
  array16: arrayUntyped,
  array32: arrayUntyped,
  arrayLengthen: arrayLengthenUntyped,
  arrayWiden: arrayWidenUntyped,
  bitarray: bitarray
};

const filterExact = (bisect, value) => {
  return function(values) {
    var n = values.length;
    return [bisect.left(values, value, 0, n), bisect.right(values, value, 0, n)];
  };
};

const filterRange = (bisect, range) => {
  var min = range[0],
      max = range[1];
  return function(values) {
    var n = values.length;
    return [bisect.left(values, min, 0, n), bisect.left(values, max, 0, n)];
  };
};

const filterAll = values => {
  return [0, values.length];
};

var xfilterFilter = {
  filterExact,
  filterRange,
  filterAll
};

var cr_identity = d => {
  return d;
};

var cr_null = () =>  {
  return null;
};

var cr_zero = () => {
  return 0;
};

function heap_by(f) {

  // Builds a binary heap within the specified array a[lo:hi]. The heap has the
  // property such that the parent a[lo+i] is always less than or equal to its
  // two children: a[lo+2*i+1] and a[lo+2*i+2].
  function heap(a, lo, hi) {
    var n = hi - lo,
        i = (n >>> 1) + 1;
    while (--i > 0) sift(a, i, n, lo);
    return a;
  }

  // Sorts the specified array a[lo:hi] in descending order, assuming it is
  // already a heap.
  function sort(a, lo, hi) {
    var n = hi - lo,
        t;
    while (--n > 0) t = a[lo], a[lo] = a[lo + n], a[lo + n] = t, sift(a, 1, n, lo);
    return a;
  }

  // Sifts the element a[lo+i-1] down the heap, where the heap is the contiguous
  // slice of array a[lo:lo+n]. This method can also be used to update the heap
  // incrementally, without incurring the full cost of reconstructing the heap.
  function sift(a, i, n, lo) {
    var d = a[--lo + i],
        x = f(d),
        child;
    while ((child = i << 1) <= n) {
      if (child < n && f(a[lo + child]) > f(a[lo + child + 1])) child++;
      if (x <= f(a[lo + child])) break;
      a[lo + i] = a[lo + child];
      i = child;
    }
    a[lo + i] = d;
  }

  heap.sort = sort;
  return heap;
}

const h$1 = heap_by(cr_identity);
h$1.by = heap_by;

function heapselect_by(f) {
  var heap = h$1.by(f);

  // Returns a new array containing the top k elements in the array a[lo:hi].
  // The returned array is not sorted, but maintains the heap property. If k is
  // greater than hi - lo, then fewer than k elements will be returned. The
  // order of elements in a is unchanged by this operation.
  function heapselect(a, lo, hi, k) {
    var queue = new Array(k = Math.min(hi - lo, k)),
        min,
        i,
        d;

    for (i = 0; i < k; ++i) queue[i] = a[lo++];
    heap(queue, 0, k);

    if (lo < hi) {
      min = f(queue[0]);
      do {
        if (f(d = a[lo]) > min) {
          queue[0] = d;
          min = f(heap(queue, 0, k)[0]);
        }
      } while (++lo < hi);
    }

    return queue;
  }

  return heapselect;
}


const h = heapselect_by(cr_identity);
h.by = heapselect_by; // assign the raw function to the export as well

function bisect_by(f) {

  // Locate the insertion point for x in a to maintain sorted order. The
  // arguments lo and hi may be used to specify a subset of the array which
  // should be considered; by default the entire array is used. If x is already
  // present in a, the insertion point will be before (to the left of) any
  // existing entries. The return value is suitable for use as the first
  // argument to `array.splice` assuming that a is already sorted.
  //
  // The returned insertion point i partitions the array a into two halves so
  // that all v < x for v in a[lo:i] for the left side and all v >= x for v in
  // a[i:hi] for the right side.
  function bisectLeft(a, x, lo, hi) {
    while (lo < hi) {
      var mid = lo + hi >>> 1;
      if (f(a[mid]) < x) lo = mid + 1;
      else hi = mid;
    }
    return lo;
  }

  // Similar to bisectLeft, but returns an insertion point which comes after (to
  // the right of) any existing entries of x in a.
  //
  // The returned insertion point i partitions the array into two halves so that
  // all v <= x for v in a[lo:i] for the left side and all v > x for v in
  // a[i:hi] for the right side.
  function bisectRight(a, x, lo, hi) {
    while (lo < hi) {
      var mid = lo + hi >>> 1;
      if (x < f(a[mid])) hi = mid;
      else lo = mid + 1;
    }
    return lo;
  }

  bisectRight.right = bisectRight;
  bisectRight.left = bisectLeft;
  return bisectRight;
}

const bisect = bisect_by(cr_identity);
bisect.by = bisect_by; // assign the raw function to the export as well

var permute = (array, index, deep) => {
  for (var i = 0, n = index.length, copy = deep ? JSON.parse(JSON.stringify(array)) : new Array(n); i < n; ++i) {
    copy[i] = array[index[i]];
  }
  return copy;
};

const reduceIncrement = p => {
  return p + 1;
};

const reduceDecrement = p => {
  return p - 1;
};

const reduceAdd = f => {
  return function(p, v) {
    return p + +f(v);
  };
};

const reduceSubtract = f => {
  return function(p, v) {
    return p - f(v);
  };
};

var xfilterReduce = {
  reduceIncrement,
  reduceDecrement,
  reduceAdd,
  reduceSubtract
};

function deep(t,e,i,n,r){for(r in n=(i=i.split(".")).splice(-1,1),i)e=e[i[r]]=e[i[r]]||{};return t(e,n)}

// Note(cg): result was previsouly using lodash.result, not ESM compatible.
 
const get = (obj, prop) => {
  const value = obj[prop];
  return (typeof value === 'function') ? value.call(obj) : value;
};

/**
 * get value of object at a deep path.
 * if the resolved value is a function,
 * it's invoked with the `this` binding of 
 * its parent object and its result is returned. 
 *  
 * @param  {Object} obj  the object (e.g. { 'a': [{ 'b': { 'c1': 3, 'c2': 4} }], 'd': {e:1} }; )
 * @param  {String} path deep path (e.g. `d.e`` or `a[0].b.c1`. Dot notation (a.0.b)is also supported)
 * @return {Any}      the resolved value
 */
const reg = /\[([\w\d]+)\]/g;
var result = (obj, path) => {
  return deep(get, obj, path.replace(reg, '.$1'))
};

// constants
var REMOVED_INDEX = -1;

crossfilter$1.heap = h$1;
crossfilter$1.heapselect = h;
crossfilter$1.bisect = bisect;
crossfilter$1.permute = permute;

function crossfilter$1() {
  var crossfilter = {
    add: add,
    remove: removeData,
    dimension: dimension,
    groupAll: groupAll,
    size: size,
    all: all,
    allFiltered: allFiltered,
    onChange: onChange,
    isElementFiltered: isElementFiltered
  };

  var data = [], // the records
      n = 0, // the number of records; data.length
      filters, // 1 is filtered out
      filterListeners = [], // when the filters change
      dataListeners = [], // when data is added
      removeDataListeners = [], // when data is removed
      callbacks = [];

  filters = new xfilterArray.bitarray(0);

  // Adds the specified new records to this crossfilter.
  function add(newData) {
    var n0 = n,
        n1 = newData.length;

    // If there's actually new data to add…
    // Merge the new data into the existing data.
    // Lengthen the filter bitset to handle the new records.
    // Notify listeners (dimensions and groups) that new data is available.
    if (n1) {
      data = data.concat(newData);
      filters.lengthen(n += n1);
      dataListeners.forEach(function(l) { l(newData, n0, n1); });
      triggerOnChange('dataAdded');
    }

    return crossfilter;
  }

  // Removes all records that match the current filters, or if a predicate function is passed,
  // removes all records matching the predicate (ignoring filters).
  function removeData(predicate) {
    var // Mapping from old record indexes to new indexes (after records removed)
        newIndex = new Array(n),
        removed = [],
        usePred = typeof predicate === 'function',
        shouldRemove = function (i) {
          return usePred ? predicate(data[i], i) : filters.zero(i)
        };

    for (var index1 = 0, index2 = 0; index1 < n; ++index1) {
      if ( shouldRemove(index1) ) {
        removed.push(index1);
        newIndex[index1] = REMOVED_INDEX;
      } else {
        newIndex[index1] = index2++;
      }
    }

    // Remove all matching records from groups.
    filterListeners.forEach(function(l) { l(-1, -1, [], removed, true); });

    // Update indexes.
    removeDataListeners.forEach(function(l) { l(newIndex); });

    // Remove old filters and data by overwriting.
    for (var index3 = 0, index4 = 0; index3 < n; ++index3) {
      if ( newIndex[index3] !== REMOVED_INDEX ) {
        if (index3 !== index4) filters.copy(index4, index3), data[index4] = data[index3];
        ++index4;
      }
    }

    data.length = n = index4;
    filters.truncate(index4);
    triggerOnChange('dataRemoved');
  }

  function maskForDimensions(dimensions) {
    var n,
        d,
        len,
        id,
        mask = Array(filters.subarrays);
    for (n = 0; n < filters.subarrays; n++) { mask[n] = ~0; }
    for (d = 0, len = dimensions.length; d < len; d++) {
      // The top bits of the ID are the subarray offset and the lower bits are the bit
      // offset of the "one" mask.
      id = dimensions[d].id();
      mask[id >> 7] &= ~(0x1 << (id & 0x3f));
    }
    return mask;
  }

  // Return true if the data element at index i is filtered IN.
  // Optionally, ignore the filters of any dimensions in the ignore_dimensions list.
  function isElementFiltered(i, ignore_dimensions) {
    var mask = maskForDimensions(ignore_dimensions || []);
    return filters.zeroExceptMask(i,mask);
  }

  // Adds a new dimension with the specified value accessor function.
  function dimension(value, iterable) {

    if (typeof value === 'string') {
      var accessorPath = value;
      value = function(d) { return result(d, accessorPath); };
    }

    var dimension = {
      filter: filter,
      filterExact: filterExact,
      filterRange: filterRange,
      filterFunction: filterFunction,
      filterAll: filterAll,
      currentFilter: currentFilter,
      hasCurrentFilter: hasCurrentFilter,
      top: top,
      bottom: bottom,
      group: group,
      groupAll: groupAll,
      dispose: dispose,
      remove: dispose, // for backwards-compatibility
      accessor: value,
      id: function() { return id; }
    };

    var one, // lowest unset bit as mask, e.g., 00001000
        zero, // inverted one, e.g., 11110111
        offset, // offset into the filters arrays
        id, // unique ID for this dimension (reused when dimensions are disposed)
        values, // sorted, cached array
        index, // maps sorted value index -> record index (in data)
        newValues, // temporary array storing newly-added values
        newIndex, // temporary array storing newly-added index
        iterablesIndexCount,
        iterablesIndexFilterStatus,
        iterablesEmptyRows = [],
        sortRange = function(n) {
          return cr_range(n).sort(function(A, B) {
            var a = newValues[A], b = newValues[B];
            return a < b ? -1 : a > b ? 1 : A - B;
          });
        },
        refilter = xfilterFilter.filterAll, // for recomputing filter
        refilterFunction, // the custom filter function in use
        filterValue, // the value used for filtering (value, array, function or undefined)
        filterValuePresent, // true if filterValue contains something
        indexListeners = [], // when data is added
        dimensionGroups = [],
        lo0 = 0,
        hi0 = 0,
        t = 0,
        k;

    // Updating a dimension is a two-stage process. First, we must update the
    // associated filters for the newly-added records. Once all dimensions have
    // updated their filters, the groups are notified to update.
    dataListeners.unshift(preAdd);
    dataListeners.push(postAdd);

    removeDataListeners.push(removeData);

    // Add a new dimension in the filter bitmap and store the offset and bitmask.
    var tmp = filters.add();
    offset = tmp.offset;
    one = tmp.one;
    zero = ~one;

    // Create a unique ID for the dimension
    // IDs will be re-used if dimensions are disposed.
    // For internal use the ID is the subarray offset shifted left 7 bits or'd with the
    // bit offset of the set bit in the dimension's "one" mask.
    id = (offset << 7) | (Math.log(one) / Math.log(2));

    preAdd(data, 0, n);
    postAdd(data, 0, n);

    // Incorporates the specified new records into this dimension.
    // This function is responsible for updating filters, values, and index.
    function preAdd(newData, n0, n1) {
      var newIterablesIndexCount,
          newIterablesIndexFilterStatus;

      if (iterable){
        // Count all the values
        t = 0;
        j = 0;
        k = [];

        for (var i0 = 0; i0 < newData.length; i0++) {
          for(j = 0, k = value(newData[i0]); j < k.length; j++) {
            t++;
          }
        }

        newValues = [];
        newIterablesIndexCount = cr_range(newData.length);
        newIterablesIndexFilterStatus = cr_index(t,1);
        var unsortedIndex = cr_range(t);

        for (var l = 0, index1 = 0; index1 < newData.length; index1++) {
          k = value(newData[index1]);
          //
          if(!k.length){
            newIterablesIndexCount[index1] = 0;
            iterablesEmptyRows.push(index1 + n0);
            continue;
          }
          newIterablesIndexCount[index1] = k.length;
          for (j = 0; j < k.length; j++) {
            newValues.push(k[j]);
            unsortedIndex[l] = index1;
            l++;
          }
        }

        // Create the Sort map used to sort both the values and the valueToData indices
        var sortMap = sortRange(t);

        // Use the sortMap to sort the newValues
        newValues = permute(newValues, sortMap);


        // Use the sortMap to sort the unsortedIndex map
        // newIndex should be a map of sortedValue -> crossfilterData
        newIndex = permute(unsortedIndex, sortMap);

      } else {
        // Permute new values into natural order using a standard sorted index.
        newValues = newData.map(value);
        newIndex = sortRange(n1);
        newValues = permute(newValues, newIndex);
      }

      // Bisect newValues to determine which new records are selected.
      var bounds = refilter(newValues), lo1 = bounds[0], hi1 = bounds[1];

      var index2, index3, index4;
      if(iterable) {
        n1 = t;
        if (refilterFunction) {
          for (index2 = 0; index2 < n1; ++index2) {
            if (!refilterFunction(newValues[index2], index2)) {
              if(--newIterablesIndexCount[newIndex[index2]] === 0) {
                filters[offset][newIndex[index2] + n0] |= one;
              }
              newIterablesIndexFilterStatus[index2] = 1;
            }
          }
        } else {
          for (index3 = 0; index3 < lo1; ++index3) {
            if(--newIterablesIndexCount[newIndex[index3]] === 0) {
              filters[offset][newIndex[index3] + n0] |= one;
            }
            newIterablesIndexFilterStatus[index3] = 1;
          }
          for (index4 = hi1; index4 < n1; ++index4) {
            if(--newIterablesIndexCount[newIndex[index4]] === 0) {
              filters[offset][newIndex[index4] + n0] |= one;
            }
            newIterablesIndexFilterStatus[index4] = 1;
          }
        }
      } else {
        if (refilterFunction) {
          for (index2 = 0; index2 < n1; ++index2) {
            if (!refilterFunction(newValues[index2], index2)) {
              filters[offset][newIndex[index2] + n0] |= one;
            }
          }
        } else {
          for (index3 = 0; index3 < lo1; ++index3) {
            filters[offset][newIndex[index3] + n0] |= one;
          }
          for (index4 = hi1; index4 < n1; ++index4) {
            filters[offset][newIndex[index4] + n0] |= one;
          }
        }
      }

      // If this dimension previously had no data, then we don't need to do the
      // more expensive merge operation; use the new values and index as-is.
      if (!n0) {
        values = newValues;
        index = newIndex;
        iterablesIndexCount = newIterablesIndexCount;
        iterablesIndexFilterStatus = newIterablesIndexFilterStatus;
        lo0 = lo1;
        hi0 = hi1;
        return;
      }



      var oldValues = values,
        oldIndex = index,
        oldIterablesIndexFilterStatus = iterablesIndexFilterStatus,
        old_n0,
        i1 = 0;

      i0 = 0;

      if(iterable){
        old_n0 = n0;
        n0 = oldValues.length;
        n1 = t;
      }

      // Otherwise, create new arrays into which to merge new and old.
      values = iterable ? new Array(n0 + n1) : new Array(n);
      index = iterable ? new Array(n0 + n1) : cr_index(n, n);
      if(iterable) iterablesIndexFilterStatus = cr_index(n0 + n1, 1);

      // Concatenate the newIterablesIndexCount onto the old one.
      if(iterable) {
        var oldiiclength = iterablesIndexCount.length;
        iterablesIndexCount = xfilterArray.arrayLengthen(iterablesIndexCount, n);
        for(var j=0; j+oldiiclength < n; j++) {
          iterablesIndexCount[j+oldiiclength] = newIterablesIndexCount[j];
        }
      }

      // Merge the old and new sorted values, and old and new index.
      var index5 = 0;
      for (; i0 < n0 && i1 < n1; ++index5) {
        if (oldValues[i0] < newValues[i1]) {
          values[index5] = oldValues[i0];
          if(iterable) iterablesIndexFilterStatus[index5] = oldIterablesIndexFilterStatus[i0];
          index[index5] = oldIndex[i0++];
        } else {
          values[index5] = newValues[i1];
          if(iterable) iterablesIndexFilterStatus[index5] = newIterablesIndexFilterStatus[i1];
          index[index5] = newIndex[i1++] + (iterable ? old_n0 : n0);
        }
      }

      // Add any remaining old values.
      for (; i0 < n0; ++i0, ++index5) {
        values[index5] = oldValues[i0];
        if(iterable) iterablesIndexFilterStatus[index5] = oldIterablesIndexFilterStatus[i0];
        index[index5] = oldIndex[i0];
      }

      // Add any remaining new values.
      for (; i1 < n1; ++i1, ++index5) {
        values[index5] = newValues[i1];
        if(iterable) iterablesIndexFilterStatus[index5] = newIterablesIndexFilterStatus[i1];
        index[index5] = newIndex[i1] + (iterable ? old_n0 : n0);
      }

      // Bisect again to recompute lo0 and hi0.
      bounds = refilter(values), lo0 = bounds[0], hi0 = bounds[1];
    }

    // When all filters have updated, notify index listeners of the new values.
    function postAdd(newData, n0, n1) {
      indexListeners.forEach(function(l) { l(newValues, newIndex, n0, n1); });
      newValues = newIndex = null;
    }

    function removeData(reIndex) {
      if (iterable) {
        for (var i0 = 0, i1 = 0; i0 < iterablesEmptyRows.length; i0++) {
          if (reIndex[iterablesEmptyRows[i0]] !== REMOVED_INDEX) {
            iterablesEmptyRows[i1] = reIndex[iterablesEmptyRows[i0]];
            i1++;
          }
        }
        iterablesEmptyRows.length = i1;
        for (i0 = 0, i1 = 0; i0 < n; i0++) {
          if (reIndex[i0] !== REMOVED_INDEX) {
            if (i1 !== i0) iterablesIndexCount[i1] = iterablesIndexCount[i0];
            i1++;
          }
        }
        iterablesIndexCount = iterablesIndexCount.slice(0, i1);
      }
      // Rewrite our index, overwriting removed values
      var n0 = values.length;
      for (var i = 0, j = 0, oldDataIndex; i < n0; ++i) {
        oldDataIndex = index[i];
        if (reIndex[oldDataIndex] !== REMOVED_INDEX) {
          if (i !== j) values[j] = values[i];
          index[j] = reIndex[oldDataIndex];
          if (iterable) {
            iterablesIndexFilterStatus[j] = iterablesIndexFilterStatus[i];
          }
          ++j;
        }
      }
      values.length = j;
      if (iterable) iterablesIndexFilterStatus = iterablesIndexFilterStatus.slice(0, j);
      while (j < n0) index[j++] = 0;

      // Bisect again to recompute lo0 and hi0.
      var bounds = refilter(values);
      lo0 = bounds[0], hi0 = bounds[1];
    }

    // Updates the selected values based on the specified bounds [lo, hi].
    // This implementation is used by all the public filter methods.
    function filterIndexBounds(bounds) {

      var lo1 = bounds[0],
          hi1 = bounds[1];

      if (refilterFunction) {
        refilterFunction = null;
        filterIndexFunction(function(d, i) { return lo1 <= i && i < hi1; }, bounds[0] === 0 && bounds[1] === values.length);
        lo0 = lo1;
        hi0 = hi1;
        return dimension;
      }

      var i,
          j,
          k,
          added = [],
          removed = [],
          valueIndexAdded = [],
          valueIndexRemoved = [];


      // Fast incremental update based on previous lo index.
      if (lo1 < lo0) {
        for (i = lo1, j = Math.min(lo0, hi1); i < j; ++i) {
          added.push(index[i]);
          valueIndexAdded.push(i);
        }
      } else if (lo1 > lo0) {
        for (i = lo0, j = Math.min(lo1, hi0); i < j; ++i) {
          removed.push(index[i]);
          valueIndexRemoved.push(i);
        }
      }

      // Fast incremental update based on previous hi index.
      if (hi1 > hi0) {
        for (i = Math.max(lo1, hi0), j = hi1; i < j; ++i) {
          added.push(index[i]);
          valueIndexAdded.push(i);
        }
      } else if (hi1 < hi0) {
        for (i = Math.max(lo0, hi1), j = hi0; i < j; ++i) {
          removed.push(index[i]);
          valueIndexRemoved.push(i);
        }
      }

      if(!iterable) {
        // Flip filters normally.

        for(i=0; i<added.length; i++) {
          filters[offset][added[i]] ^= one;
        }

        for(i=0; i<removed.length; i++) {
          filters[offset][removed[i]] ^= one;
        }

      } else {
        // For iterables, we need to figure out if the row has been completely removed vs partially included
        // Only count a row as added if it is not already being aggregated. Only count a row
        // as removed if the last element being aggregated is removed.

        var newAdded = [];
        var newRemoved = [];
        for (i = 0; i < added.length; i++) {
          iterablesIndexCount[added[i]]++;
          iterablesIndexFilterStatus[valueIndexAdded[i]] = 0;
          if(iterablesIndexCount[added[i]] === 1) {
            filters[offset][added[i]] ^= one;
            newAdded.push(added[i]);
          }
        }
        for (i = 0; i < removed.length; i++) {
          iterablesIndexCount[removed[i]]--;
          iterablesIndexFilterStatus[valueIndexRemoved[i]] = 1;
          if(iterablesIndexCount[removed[i]] === 0) {
            filters[offset][removed[i]] ^= one;
            newRemoved.push(removed[i]);
          }
        }

        added = newAdded;
        removed = newRemoved;

        // Now handle empty rows.
        if(refilter === xfilterFilter.filterAll) {
          for(i = 0; i < iterablesEmptyRows.length; i++) {
            if((filters[offset][k = iterablesEmptyRows[i]] & one)) {
              // Was not in the filter, so set the filter and add
              filters[offset][k] ^= one;
              added.push(k);
            }
          }
        } else {
          // filter in place - remove empty rows if necessary
          for(i = 0; i < iterablesEmptyRows.length; i++) {
            if(!(filters[offset][k = iterablesEmptyRows[i]] & one)) {
              // Was in the filter, so set the filter and remove
              filters[offset][k] ^= one;
              removed.push(k);
            }
          }
        }
      }

      lo0 = lo1;
      hi0 = hi1;
      filterListeners.forEach(function(l) { l(one, offset, added, removed); });
      triggerOnChange('filtered');
      return dimension;
    }

    // Filters this dimension using the specified range, value, or null.
    // If the range is null, this is equivalent to filterAll.
    // If the range is an array, this is equivalent to filterRange.
    // Otherwise, this is equivalent to filterExact.
    function filter(range) {
      return range == null
          ? filterAll() : Array.isArray(range)
          ? filterRange(range) : typeof range === "function"
          ? filterFunction(range)
          : filterExact(range);
    }

    // Filters this dimension to select the exact value.
    function filterExact(value) {
      filterValue = value;
      filterValuePresent = true;
      return filterIndexBounds((refilter = xfilterFilter.filterExact(bisect, value))(values));
    }

    // Filters this dimension to select the specified range [lo, hi].
    // The lower bound is inclusive, and the upper bound is exclusive.
    function filterRange(range) {
      filterValue = range;
      filterValuePresent = true;
      return filterIndexBounds((refilter = xfilterFilter.filterRange(bisect, range))(values));
    }

    // Clears any filters on this dimension.
    function filterAll() {
      filterValue = undefined;
      filterValuePresent = false;
      return filterIndexBounds((refilter = xfilterFilter.filterAll)(values));
    }

    // Filters this dimension using an arbitrary function.
    function filterFunction(f) {
      filterValue = f;
      filterValuePresent = true;

      refilterFunction = f;
      refilter = xfilterFilter.filterAll;

      filterIndexFunction(f, false);

      var bounds = refilter(values);
      lo0 = bounds[0], hi0 = bounds[1];

      return dimension;
    }

    function filterIndexFunction(f, filterAll) {
      var i,
          k,
          x,
          added = [],
          removed = [],
          valueIndexAdded = [],
          valueIndexRemoved = [],
          indexLength = values.length;

      if(!iterable) {
        for (i = 0; i < indexLength; ++i) {
          if (!(filters[offset][k = index[i]] & one) ^ !!(x = f(values[i], i))) {
            if (x) added.push(k);
            else removed.push(k);
          }
        }
      }

      if(iterable) {
        for(i=0; i < indexLength; ++i) {
          if(f(values[i], i)) {
            added.push(index[i]);
            valueIndexAdded.push(i);
          } else {
            removed.push(index[i]);
            valueIndexRemoved.push(i);
          }
        }
      }

      if(!iterable) {
        for(i=0; i<added.length; i++) {
          if(filters[offset][added[i]] & one) filters[offset][added[i]] &= zero;
        }

        for(i=0; i<removed.length; i++) {
          if(!(filters[offset][removed[i]] & one)) filters[offset][removed[i]] |= one;
        }
      } else {

        var newAdded = [];
        var newRemoved = [];
        for (i = 0; i < added.length; i++) {
          // First check this particular value needs to be added
          if(iterablesIndexFilterStatus[valueIndexAdded[i]] === 1) {
            iterablesIndexCount[added[i]]++;
            iterablesIndexFilterStatus[valueIndexAdded[i]] = 0;
            if(iterablesIndexCount[added[i]] === 1) {
              filters[offset][added[i]] ^= one;
              newAdded.push(added[i]);
            }
          }
        }
        for (i = 0; i < removed.length; i++) {
          // First check this particular value needs to be removed
          if(iterablesIndexFilterStatus[valueIndexRemoved[i]] === 0) {
            iterablesIndexCount[removed[i]]--;
            iterablesIndexFilterStatus[valueIndexRemoved[i]] = 1;
            if(iterablesIndexCount[removed[i]] === 0) {
              filters[offset][removed[i]] ^= one;
              newRemoved.push(removed[i]);
            }
          }
        }

        added = newAdded;
        removed = newRemoved;

        // Now handle empty rows.
        if(filterAll) {
          for(i = 0; i < iterablesEmptyRows.length; i++) {
            if((filters[offset][k = iterablesEmptyRows[i]] & one)) {
              // Was not in the filter, so set the filter and add
              filters[offset][k] ^= one;
              added.push(k);
            }
          }
        } else {
          // filter in place - remove empty rows if necessary
          for(i = 0; i < iterablesEmptyRows.length; i++) {
            if(!(filters[offset][k = iterablesEmptyRows[i]] & one)) {
              // Was in the filter, so set the filter and remove
              filters[offset][k] ^= one;
              removed.push(k);
            }
          }
        }
      }

      filterListeners.forEach(function(l) { l(one, offset, added, removed); });
      triggerOnChange('filtered');
    }

    function currentFilter() {
      return filterValue;
    }

    function hasCurrentFilter() {
      return filterValuePresent;
    }

    // Returns the top K selected records based on this dimension's order.
    // Note: observes this dimension's filter, unlike group and groupAll.
    function top(k, top_offset) {
      var array = [],
          i = hi0,
          j,
          toSkip = 0;

      if(top_offset && top_offset > 0) toSkip = top_offset;

      while (--i >= lo0 && k > 0) {
        if (filters.zero(j = index[i])) {
          if(toSkip > 0) {
            //skip matching row
            --toSkip;
          } else {
            array.push(data[j]);
            --k;
          }
        }
      }

      if(iterable){
        for(i = 0; i < iterablesEmptyRows.length && k > 0; i++) {
          // Add row with empty iterable column at the end
          if(filters.zero(j = iterablesEmptyRows[i])) {
            if(toSkip > 0) {
              //skip matching row
              --toSkip;
            } else {
              array.push(data[j]);
              --k;
            }
          }
        }
      }

      return array;
    }

    // Returns the bottom K selected records based on this dimension's order.
    // Note: observes this dimension's filter, unlike group and groupAll.
    function bottom(k, bottom_offset) {
      var array = [],
          i,
          j,
          toSkip = 0;

      if(bottom_offset && bottom_offset > 0) toSkip = bottom_offset;

      if(iterable) {
        // Add row with empty iterable column at the top
        for(i = 0; i < iterablesEmptyRows.length && k > 0; i++) {
          if(filters.zero(j = iterablesEmptyRows[i])) {
            if(toSkip > 0) {
              //skip matching row
              --toSkip;
            } else {
              array.push(data[j]);
              --k;
            }
          }
        }
      }

      i = lo0;

      while (i < hi0 && k > 0) {
        if (filters.zero(j = index[i])) {
          if(toSkip > 0) {
            //skip matching row
            --toSkip;
          } else {
            array.push(data[j]);
            --k;
          }
        }
        i++;
      }

      return array;
    }

    // Adds a new group to this dimension, using the specified key function.
    function group(key) {
      var group = {
        top: top,
        all: all,
        reduce: reduce,
        reduceCount: reduceCount,
        reduceSum: reduceSum,
        order: order,
        orderNatural: orderNatural,
        size: size,
        dispose: dispose,
        remove: dispose // for backwards-compatibility
      };

      // Ensure that this group will be removed when the dimension is removed.
      dimensionGroups.push(group);

      var groups, // array of {key, value}
          groupIndex, // object id ↦ group id
          groupWidth = 8,
          groupCapacity = capacity(groupWidth),
          k = 0, // cardinality
          select,
          heap,
          reduceAdd,
          reduceRemove,
          reduceInitial,
          update = cr_null,
          reset = cr_null,
          resetNeeded = true,
          groupAll = key === cr_null,
          n0old;

      if (arguments.length < 1) key = cr_identity;

      // The group listens to the crossfilter for when any dimension changes, so
      // that it can update the associated reduce values. It must also listen to
      // the parent dimension for when data is added, and compute new keys.
      filterListeners.push(update);
      indexListeners.push(add);
      removeDataListeners.push(removeData);

      // Incorporate any existing data into the grouping.
      add(values, index, 0, n);

      // Incorporates the specified new values into this group.
      // This function is responsible for updating groups and groupIndex.
      function add(newValues, newIndex, n0, n1) {

        if(iterable) {
          n0old = n0;
          n0 = values.length - newValues.length;
          n1 = newValues.length;
        }

        var oldGroups = groups,
            reIndex = iterable ? [] : cr_index(k, groupCapacity),
            add = reduceAdd,
            remove = reduceRemove,
            initial = reduceInitial,
            k0 = k, // old cardinality
            i0 = 0, // index of old group
            i1 = 0, // index of new record
            j, // object id
            g0, // old group
            x0, // old key
            x1, // new key
            g, // group to add
            x; // key of group to add

        // If a reset is needed, we don't need to update the reduce values.
        if (resetNeeded) add = initial = cr_null;
        if (resetNeeded) remove = initial = cr_null;

        // Reset the new groups (k is a lower bound).
        // Also, make sure that groupIndex exists and is long enough.
        groups = new Array(k), k = 0;
        if(iterable){
          groupIndex = k0 ? groupIndex : [];
        }
        else {
          groupIndex = k0 > 1 ? xfilterArray.arrayLengthen(groupIndex, n) : cr_index(n, groupCapacity);
        }


        // Get the first old key (x0 of g0), if it exists.
        if (k0) x0 = (g0 = oldGroups[0]).key;

        // Find the first new key (x1), skipping NaN keys.
        while (i1 < n1 && !((x1 = key(newValues[i1])) >= x1)) ++i1;

        // While new keys remain…
        while (i1 < n1) {

          // Determine the lesser of the two current keys; new and old.
          // If there are no old keys remaining, then always add the new key.
          if (g0 && x0 <= x1) {
            g = g0, x = x0;

            // Record the new index of the old group.
            reIndex[i0] = k;

            // Retrieve the next old key.
            g0 = oldGroups[++i0];
            if (g0) x0 = g0.key;
          } else {
            g = {key: x1, value: initial()}, x = x1;
          }

          // Add the lesser group.
          groups[k] = g;

          // Add any selected records belonging to the added group, while
          // advancing the new key and populating the associated group index.

          while (x1 <= x) {
            j = newIndex[i1] + (iterable ? n0old : n0);


            if(iterable){
              if(groupIndex[j]){
                groupIndex[j].push(k);
              }
              else {
                groupIndex[j] = [k];
              }
            }
            else {
              groupIndex[j] = k;
            }

            // Always add new values to groups. Only remove when not in filter.
            // This gives groups full information on data life-cycle.
            g.value = add(g.value, data[j], true);
            if (!filters.zeroExcept(j, offset, zero)) g.value = remove(g.value, data[j], false);
            if (++i1 >= n1) break;
            x1 = key(newValues[i1]);
          }

          groupIncrement();
        }

        // Add any remaining old groups that were greater th1an all new keys.
        // No incremental reduce is needed; these groups have no new records.
        // Also record the new index of the old group.
        while (i0 < k0) {
          groups[reIndex[i0] = k] = oldGroups[i0++];
          groupIncrement();
        }


        // Fill in gaps with empty arrays where there may have been rows with empty iterables
        if(iterable){
          for (var index1 = 0; index1 < n; index1++) {
            if(!groupIndex[index1]){
              groupIndex[index1] = [];
            }
          }
        }

        // If we added any new groups before any old groups,
        // update the group index of all the old records.
        if(k > i0){
          if(iterable){
            for (i0 = 0; i0 < n0old; ++i0) {
              for (index1 = 0; index1 < groupIndex[i0].length; index1++) {
                groupIndex[i0][index1] = reIndex[groupIndex[i0][index1]];
              }
            }
          }
          else {
            for (i0 = 0; i0 < n0; ++i0) {
              groupIndex[i0] = reIndex[groupIndex[i0]];
            }
          }
        }

        // Modify the update and reset behavior based on the cardinality.
        // If the cardinality is less than or equal to one, then the groupIndex
        // is not needed. If the cardinality is zero, then there are no records
        // and therefore no groups to update or reset. Note that we also must
        // change the registered listener to point to the new method.
        j = filterListeners.indexOf(update);
        if (k > 1 || iterable) {
          update = updateMany;
          reset = resetMany;
        } else {
          if (!k && groupAll) {
            k = 1;
            groups = [{key: null, value: initial()}];
          }
          if (k === 1) {
            update = updateOne;
            reset = resetOne;
          } else {
            update = cr_null;
            reset = cr_null;
          }
          groupIndex = null;
        }
        filterListeners[j] = update;

        // Count the number of added groups,
        // and widen the group index as needed.
        function groupIncrement() {
          if(iterable){
            k++;
            return
          }
          if (++k === groupCapacity) {
            reIndex = xfilterArray.arrayWiden(reIndex, groupWidth <<= 1);
            groupIndex = xfilterArray.arrayWiden(groupIndex, groupWidth);
            groupCapacity = capacity(groupWidth);
          }
        }
      }

      function removeData(reIndex) {
        if (k > 1 || iterable) {
          var oldK = k,
              oldGroups = groups,
              seenGroups = cr_index(oldK, oldK),
              i,
              i0,
              j;

          // Filter out non-matches by copying matching group index entries to
          // the beginning of the array.
          if (!iterable) {
            for (i = 0, j = 0; i < n; ++i) {
              if (reIndex[i] !== REMOVED_INDEX) {
                seenGroups[groupIndex[j] = groupIndex[i]] = 1;
                ++j;
              }
            }
          } else {
            for (i = 0, j = 0; i < n; ++i) {
              if (reIndex[i] !== REMOVED_INDEX) {
                groupIndex[j] = groupIndex[i];
                for (i0 = 0; i0 < groupIndex[j].length; i0++) {
                  seenGroups[groupIndex[j][i0]] = 1;
                }
                ++j;
              }
            }
            groupIndex = groupIndex.slice(0, j);
          }

          // Reassemble groups including only those groups that were referred
          // to by matching group index entries.  Note the new group index in
          // seenGroups.
          groups = [], k = 0;
          for (i = 0; i < oldK; ++i) {
            if (seenGroups[i]) {
              seenGroups[i] = k++;
              groups.push(oldGroups[i]);
            }
          }

          if (k > 1 || iterable) {
            // Reindex the group index using seenGroups to find the new index.
            if (!iterable) {
              for (i = 0; i < j; ++i) groupIndex[i] = seenGroups[groupIndex[i]];
            } else {
              for (i = 0; i < j; ++i) {
                for (i0 = 0; i0 < groupIndex[i].length; ++i0) {
                  groupIndex[i][i0] = seenGroups[groupIndex[i][i0]];
                }
              }
            }
          } else {
            groupIndex = null;
          }
          filterListeners[filterListeners.indexOf(update)] = k > 1 || iterable
              ? (reset = resetMany, update = updateMany)
              : k === 1 ? (reset = resetOne, update = updateOne)
              : reset = update = cr_null;
        } else if (k === 1) {
          if (groupAll) return;
          for (var index3 = 0; index3 < n; ++index3) if (reIndex[index3] !== REMOVED_INDEX) return;
          groups = [], k = 0;
          filterListeners[filterListeners.indexOf(update)] =
          update = reset = cr_null;
        }
      }

      // Reduces the specified selected or deselected records.
      // This function is only used when the cardinality is greater than 1.
      // notFilter indicates a crossfilter.add/remove operation.
      function updateMany(filterOne, filterOffset, added, removed, notFilter) {

        if ((filterOne === one && filterOffset === offset) || resetNeeded) return;

        var i,
            j,
            k,
            n,
            g;

        if(iterable){
          // Add the added values.
          for (i = 0, n = added.length; i < n; ++i) {
            if (filters.zeroExcept(k = added[i], offset, zero)) {
              for (j = 0; j < groupIndex[k].length; j++) {
                g = groups[groupIndex[k][j]];
                g.value = reduceAdd(g.value, data[k], false, j);
              }
            }
          }

          // Remove the removed values.
          for (i = 0, n = removed.length; i < n; ++i) {
            if (filters.onlyExcept(k = removed[i], offset, zero, filterOffset, filterOne)) {
              for (j = 0; j < groupIndex[k].length; j++) {
                g = groups[groupIndex[k][j]];
                g.value = reduceRemove(g.value, data[k], notFilter, j);
              }
            }
          }
          return;
        }

        // Add the added values.
        for (i = 0, n = added.length; i < n; ++i) {
          if (filters.zeroExcept(k = added[i], offset, zero)) {
            g = groups[groupIndex[k]];
            g.value = reduceAdd(g.value, data[k], false);
          }
        }

        // Remove the removed values.
        for (i = 0, n = removed.length; i < n; ++i) {
          if (filters.onlyExcept(k = removed[i], offset, zero, filterOffset, filterOne)) {
            g = groups[groupIndex[k]];
            g.value = reduceRemove(g.value, data[k], notFilter);
          }
        }
      }

      // Reduces the specified selected or deselected records.
      // This function is only used when the cardinality is 1.
      // notFilter indicates a crossfilter.add/remove operation.
      function updateOne(filterOne, filterOffset, added, removed, notFilter) {
        if ((filterOne === one && filterOffset === offset) || resetNeeded) return;

        var i,
            k,
            n,
            g = groups[0];

        // Add the added values.
        for (i = 0, n = added.length; i < n; ++i) {
          if (filters.zeroExcept(k = added[i], offset, zero)) {
            g.value = reduceAdd(g.value, data[k], false);
          }
        }

        // Remove the removed values.
        for (i = 0, n = removed.length; i < n; ++i) {
          if (filters.onlyExcept(k = removed[i], offset, zero, filterOffset, filterOne)) {
            g.value = reduceRemove(g.value, data[k], notFilter);
          }
        }
      }

      // Recomputes the group reduce values from scratch.
      // This function is only used when the cardinality is greater than 1.
      function resetMany() {
        var i,
            j,
            g;

        // Reset all group values.
        for (i = 0; i < k; ++i) {
          groups[i].value = reduceInitial();
        }

        // We add all records and then remove filtered records so that reducers
        // can build an 'unfiltered' view even if there are already filters in
        // place on other dimensions.
        if(iterable){
          for (i = 0; i < n; ++i) {
            for (j = 0; j < groupIndex[i].length; j++) {
              g = groups[groupIndex[i][j]];
              g.value = reduceAdd(g.value, data[i], true, j);
            }
          }
          for (i = 0; i < n; ++i) {
            if (!filters.zeroExcept(i, offset, zero)) {
              for (j = 0; j < groupIndex[i].length; j++) {
                g = groups[groupIndex[i][j]];
                g.value = reduceRemove(g.value, data[i], false, j);
              }
            }
          }
          return;
        }

        for (i = 0; i < n; ++i) {
          g = groups[groupIndex[i]];
          g.value = reduceAdd(g.value, data[i], true);
        }
        for (i = 0; i < n; ++i) {
          if (!filters.zeroExcept(i, offset, zero)) {
            g = groups[groupIndex[i]];
            g.value = reduceRemove(g.value, data[i], false);
          }
        }
      }

      // Recomputes the group reduce values from scratch.
      // This function is only used when the cardinality is 1.
      function resetOne() {
        var i,
            g = groups[0];

        // Reset the singleton group values.
        g.value = reduceInitial();

        // We add all records and then remove filtered records so that reducers
        // can build an 'unfiltered' view even if there are already filters in
        // place on other dimensions.
        for (i = 0; i < n; ++i) {
          g.value = reduceAdd(g.value, data[i], true);
        }

        for (i = 0; i < n; ++i) {
          if (!filters.zeroExcept(i, offset, zero)) {
            g.value = reduceRemove(g.value, data[i], false);
          }
        }
      }

      // Returns the array of group values, in the dimension's natural order.
      function all() {
        if (resetNeeded) reset(), resetNeeded = false;
        return groups;
      }

      // Returns a new array containing the top K group values, in reduce order.
      function top(k) {
        var top = select(all(), 0, groups.length, k);
        return heap.sort(top, 0, top.length);
      }

      // Sets the reduce behavior for this group to use the specified functions.
      // This method lazily recomputes the reduce values, waiting until needed.
      function reduce(add, remove, initial) {
        reduceAdd = add;
        reduceRemove = remove;
        reduceInitial = initial;
        resetNeeded = true;
        return group;
      }

      // A convenience method for reducing by count.
      function reduceCount() {
        return reduce(xfilterReduce.reduceIncrement, xfilterReduce.reduceDecrement, cr_zero);
      }

      // A convenience method for reducing by sum(value).
      function reduceSum(value) {
        return reduce(xfilterReduce.reduceAdd(value), xfilterReduce.reduceSubtract(value), cr_zero);
      }

      // Sets the reduce order, using the specified accessor.
      function order(value) {
        select = h.by(valueOf);
        heap = h$1.by(valueOf);
        function valueOf(d) { return value(d.value); }
        return group;
      }

      // A convenience method for natural ordering by reduce value.
      function orderNatural() {
        return order(cr_identity);
      }

      // Returns the cardinality of this group, irrespective of any filters.
      function size() {
        return k;
      }

      // Removes this group and associated event listeners.
      function dispose() {
        var i = filterListeners.indexOf(update);
        if (i >= 0) filterListeners.splice(i, 1);
        i = indexListeners.indexOf(add);
        if (i >= 0) indexListeners.splice(i, 1);
        i = removeDataListeners.indexOf(removeData);
        if (i >= 0) removeDataListeners.splice(i, 1);
        i = dimensionGroups.indexOf(group);
        if (i >= 0) dimensionGroups.splice(i, 1);
        return group;
      }

      return reduceCount().orderNatural();
    }

    // A convenience function for generating a singleton group.
    function groupAll() {
      var g = group(cr_null), all = g.all;
      delete g.all;
      delete g.top;
      delete g.order;
      delete g.orderNatural;
      delete g.size;
      g.value = function() { return all()[0].value; };
      return g;
    }

    // Removes this dimension and associated groups and event listeners.
    function dispose() {
      dimensionGroups.forEach(function(group) { group.dispose(); });
      var i = dataListeners.indexOf(preAdd);
      if (i >= 0) dataListeners.splice(i, 1);
      i = dataListeners.indexOf(postAdd);
      if (i >= 0) dataListeners.splice(i, 1);
      i = removeDataListeners.indexOf(removeData);
      if (i >= 0) removeDataListeners.splice(i, 1);
      filters.masks[offset] &= zero;
      return filterAll();
    }

    return dimension;
  }

  // A convenience method for groupAll on a dummy dimension.
  // This implementation can be optimized since it always has cardinality 1.
  function groupAll() {
    var group = {
      reduce: reduce,
      reduceCount: reduceCount,
      reduceSum: reduceSum,
      value: value,
      dispose: dispose,
      remove: dispose // for backwards-compatibility
    };

    var reduceValue,
        reduceAdd,
        reduceRemove,
        reduceInitial,
        resetNeeded = true;

    // The group listens to the crossfilter for when any dimension changes, so
    // that it can update the reduce value. It must also listen to the parent
    // dimension for when data is added.
    filterListeners.push(update);
    dataListeners.push(add);

    // For consistency; actually a no-op since resetNeeded is true.
    add(data, 0);

    // Incorporates the specified new values into this group.
    function add(newData, n0) {
      var i;

      if (resetNeeded) return;

      // Cycle through all the values.
      for (i = n0; i < n; ++i) {

        // Add all values all the time.
        reduceValue = reduceAdd(reduceValue, data[i], true);

        // Remove the value if filtered.
        if (!filters.zero(i)) {
          reduceValue = reduceRemove(reduceValue, data[i], false);
        }
      }
    }

    // Reduces the specified selected or deselected records.
    function update(filterOne, filterOffset, added, removed, notFilter) {
      var i,
          k,
          n;

      if (resetNeeded) return;

      // Add the added values.
      for (i = 0, n = added.length; i < n; ++i) {
        if (filters.zero(k = added[i])) {
          reduceValue = reduceAdd(reduceValue, data[k], notFilter);
        }
      }

      // Remove the removed values.
      for (i = 0, n = removed.length; i < n; ++i) {
        if (filters.only(k = removed[i], filterOffset, filterOne)) {
          reduceValue = reduceRemove(reduceValue, data[k], notFilter);
        }
      }
    }

    // Recomputes the group reduce value from scratch.
    function reset() {
      var i;

      reduceValue = reduceInitial();

      // Cycle through all the values.
      for (i = 0; i < n; ++i) {

        // Add all values all the time.
        reduceValue = reduceAdd(reduceValue, data[i], true);

        // Remove the value if it is filtered.
        if (!filters.zero(i)) {
          reduceValue = reduceRemove(reduceValue, data[i], false);
        }
      }
    }

    // Sets the reduce behavior for this group to use the specified functions.
    // This method lazily recomputes the reduce value, waiting until needed.
    function reduce(add, remove, initial) {
      reduceAdd = add;
      reduceRemove = remove;
      reduceInitial = initial;
      resetNeeded = true;
      return group;
    }

    // A convenience method for reducing by count.
    function reduceCount() {
      return reduce(xfilterReduce.reduceIncrement, xfilterReduce.reduceDecrement, cr_zero);
    }

    // A convenience method for reducing by sum(value).
    function reduceSum(value) {
      return reduce(xfilterReduce.reduceAdd(value), xfilterReduce.reduceSubtract(value), cr_zero);
    }

    // Returns the computed reduce value.
    function value() {
      if (resetNeeded) reset(), resetNeeded = false;
      return reduceValue;
    }

    // Removes this group and associated event listeners.
    function dispose() {
      var i = filterListeners.indexOf(update);
      if (i >= 0) filterListeners.splice(i, 1);
      i = dataListeners.indexOf(add);
      if (i >= 0) dataListeners.splice(i, 1);
      return group;
    }

    return reduceCount();
  }

  // Returns the number of records in this crossfilter, irrespective of any filters.
  function size() {
    return n;
  }

  // Returns the raw row data contained in this crossfilter
  function all(){
    return data;
  }

  // Returns row data with all dimension filters applied, except for filters in ignore_dimensions
  function allFiltered(ignore_dimensions) {
    var array = [],
        i = 0,
        mask = maskForDimensions(ignore_dimensions || []);

      for (i = 0; i < n; i++) {
        if (filters.zeroExceptMask(i, mask)) {
          array.push(data[i]);
        }
      }

      return array;
  }

  function onChange(cb){
    if(typeof cb !== 'function'){
      /* eslint no-console: 0 */
      console.warn('onChange callback parameter must be a function!');
      return;
    }
    callbacks.push(cb);
    return function(){
      callbacks.splice(callbacks.indexOf(cb), 1);
    };
  }

  function triggerOnChange(eventName){
    for (var i = 0; i < callbacks.length; i++) {
      callbacks[i](eventName);
    }
  }

  return arguments.length
      ? add(arguments[0])
      : crossfilter;
}

// Returns an array of size n, big enough to store ids up to m.
function cr_index(n, m) {
  return (m < 0x101
      ? xfilterArray.array8 : m < 0x10001
      ? xfilterArray.array16
      : xfilterArray.array32)(n);
}

// Constructs a new array of size n, with sequential values from 0 to n - 1.
function cr_range(n) {
  var range = cr_index(n, n);
  for (var i = -1; ++i < n;) range[i] = i;
  return range;
}

function capacity(w) {
  return w === 8
      ? 0x100 : w === 16
      ? 0x10000
      : 0x100000000;
}

var main = /*#__PURE__*/Object.freeze({
	__proto__: null,
	'default': crossfilter$1
});

var crossfilterreq = /*@__PURE__*/getAugmentedNamespace(main);

const crossfilter = crossfilterreq.default ? crossfilterreq.default : crossfilterreq;
// -------------------------------------------------------------------
// dx = multidimensional Crossfilter = Wrapper for crossfilter
var dx = {
  indexFns : { id : function (d) { return d.id || "" } }
, createIndexFn : function(indexFn, dim){

  var indexFns = {
      dim : function(d) { return d[dim] || "" }
    , dimId : function(d) { return d[dim + 'Id'] || "" }
  };
  if(Object.prototype.toString.call(indexFn) === '[object Function]' ) return indexFn;
  if(indexFn) return function(d) { return d[indexFn] || "" } // Assume its the column name on the data.

  indexFn = function(d){ 
    // First time execution detects key to use. We try [dim] then[{{dim}}Id] then [id]
    // This is though dangerous if first item has missing data i.e. d[dim] is undefined even though other rows have d[dim]
    console.error('default generated indexFn on non existence of model property is dangerous.');
    indexFn = d[dim] ? indexFns['dim'] : d[dim + 'Id'] ? indexFns['dimId'] :  dx.indexFns['id'];
    dx.indexFns['id'] === indexFn ? console.error('Warning : dimension name not found. Using id as default is not recommended.') : null;
    // Since we were called after the dimension processing has started we will continue to get called until each item is processed.
    // We therefore switch the function that will get called from next time onwards.
    return indexFn(d); // 
  };

  return function(d){ return indexFn(d) }
}

, filter : function(filter, dim){
  // Note : Ensure that the filter function that you pass in is the same function object. This is the only way to prevent bloat. 
  if(!filter) { console.warn('Useless call to filter without a real filter.'); return;} // All filters should already be in place since we are stateful.
  
  var filterable = dim ? this.dims[dim] : this;
  // Filters are shared between master and dimension on data.
  if(!filterable.wkFilters.get(filter)) {
    filterable.wkFilters.set(filter, true);
    filterable.filters.push(filter);  // PB : Note -- Push unique distinct filters ! This will bloat if duplicates are pushed.
  }
  
  // PB : TODO -- Check CF may not re-evaluate filters if it detects no change in filter. 
  if(filterable.dxFd){
    // This is a master dim with attached fact dimension. this.model should give us the column name on the fact data. 
    filterable.dxFd.filter( filterable.__filter );
  }  
  filterable.dxF.filter(filterable.__filter);

  // If it does re-evaluate following cascade code is not required.   
  // Cascade to all nested dimensions which are implicitly bound.
  // Object.keys(specs.dims).forEach((dim)=>{ 
  //   this.dims[dim].dxF.filter( this.dims[dim].__filter )
  // })

  // Handle other custom bound Dimensions on this dimension.
    // Master and Data crossfilters are implicitly bound. 
  // this.dims[dim].dxFm ? this.dims[dim].dxFm.filter( this.dims[dim].__filter ) : null;
  // this.dims[dim].dxFd ? this.dims[dim].dxFd.filter( this.dims[dim].__filter ) : null;

}
, filterAll : function(dim){

  var filterable = dim ? this.dims[dim] : this;
  
  if(filterable.dxFd){
    // This is a master dim with attached fact dimension. this.model should give us the column name on the fact data. 
    filterable.dxFd.filterAll();
  }  
  filterable.dxF.filterAll( );
  
  // Cascade to all nested dimensions.
  // Object.keys(specs.dims).forEach((dim)=>{ 
  //   specs[dim][dx] = specs[dim].data ? dx.create( specs[dim] ) : null;
  //   dx.__createPairedDx(specs, dim);
  // })
}
, addFilter : function(filter, dim) {
  dim = dim || 'id';
  this.dims[dim].filters.push(filter);
}
, __initDim : function(oDim){
  var __filter = function(d){
    for(var f=0; f < oDim.filters.length; f++) {
      // Filter function will be called on the dimension.
      // PB : TODO accept any scope instead of only the dimension.
      if(!oDim.filters[f].call(oDim, d)) return false;
    } 
    return true;
  };
  return oDim ? (()=>{ 
      oDim.wkFilters = new(WeakMap);
      oDim.filters = []; oDim.__filter = __filter; 
      return oDim
    })() 
    : { wkFilters : new(WeakMap), filters : [], __filter : __filter } 
}
, __createPairedDx : function(specs, dim, idxFn){
  var oDim = dim === 'id' ? specs : specs.dims[dim];
  idxFn = idxFn || dx.createIndexFn(oDim.indexFn, dim);

  oDim.dxU = specs.ndxU.dimension( idxFn );
  oDim.dxF = specs.ndxF.dimension( idxFn );
}
, create : function( specs ){
  
  specs.ndxF = crossfilter(specs.data);
  specs.ndxU = crossfilter(specs.data);
  
  // specs.dims ? null : specs.dims = { 'id' : null }
  // specs.dims['id'] = dx.__initDim(specs.dims['id'])
  dx.__initDim(specs); // id Dimension is merged with dx itself. Other dimensions will be found in dims.
  dx.__createPairedDx(specs, 'id', dx.indexFns.id);
  
  specs.dims ? Object.keys(specs.dims).forEach((dim)=>{ 
    specs.dims[dim].data ? (()=>{ 
      // We have some master data for this dimension.
        dx.create( specs.dims[dim] );
        // PB : TODO -- We should probably bind the an array dx's ... 
        // Eg: An array of master dx's for a fact dx...
        // i.e specs.bound = [ dx1 = practitioner, dx2 = xyz etc...]  

      })() 
    : dx.__initDim(specs.dims[dim]);

    var idxFn = dx.createIndexFn(specs.dims[dim].indexFn, dim);
    specs.dims[dim].dxFd = specs.ndxF.dimension( idxFn );
    specs.dims[dim].dxUd = specs.ndxU.dimension( idxFn );
    
  }) : null;

  specs.filter = this.filter;
  specs.filterAll = this.filterAll;
  return specs;
}
// , exclude : ( dxU, dxF, filterFn )=>{
//   // Excludes filtered from unfiltered.
//   var filterFn = null;
//   if(this.get('selected_doctor.id')) {

//   }
//   else {

//     var __inclusions = [];
//     var __exclusions = [];

//     practitionersDimUnfiltered.top(Infinity).forEach((availablePractitioner)=>{
//       // Per Doc
//       ndxFiltered.filterAll()
//       practitionersDimFiltered.filter(availablePractitioner.id);
//       var freeTimes = getFreeTimes(tRange, practitionersDimFiltered);
//       if(freeTimes.length > 0) { /*available*/
//         __inclusions.push(availablePractitioner) }
//       else { 
//         __exclusions.push(availablePractitioner)
//       }
      
//     })

//     filterFn =  ()=> { return ((inclusions, exclusions)=>{
//       for(var f in filters) {
//         if(!filters[f]) return false;
//       }
//       return true;
//     })(__inclusions, __exclusions) } ;

//     practitionersDimFiltered.filter(filterFn);
//   }
//   return filterFn;
// }
};

var dx_1 = dx;

var commonmasks = {
   "bed":{
      "wards":{
         "Bone Marrow Transplantation Unit":{
            "title":"Bone Marrow Transplantation Unit",
            "v1wardId":"BMTU",
            "mask":"1"
         },
         "BRB  (Birthing Room A-Big)":{
            "title":"BRB  (Birthing Room A-Big)",
            "v1wardId":"BRB",
            "mask":"2"
         },
         "BRSP  (Birthing Room-Special Private Ward)":{
            "title":"BRSP  (Birthing Room-Special Private Ward)",
            "v1wardId":"BRSP",
            "mask":"4"
         },
         "CCU  (Coronary Care Unit)":{
            "title":"CCU  (Coronary Care Unit)",
            "v1wardId":"CCU",
            "mask":"8"
         },
         "Chemotherapy Unit":{
            "title":"Chemotherapy Unit",
            "v1wardId":"CHEMOTHERAPY",
            "mask":"16"
         },
         "High Intensive Care Unit":{
            "title":"High Intensive Care Unit",
            "v1wardId":"HICU",
            "mask":"32"
         },
         "ICU  (Intensive Care Unit )":{
            "title":"ICU  (Intensive Care Unit )",
            "v1wardId":"ICU",
            "mask":"64"
         },
         "Labour Room A":{
            "title":"Labour Room A",
            "v1wardId":"LDPRA",
            "mask":"128"
         },
         "Labour Room B":{
            "title":"Labour Room B",
            "v1wardId":"LDPRB",
            "mask":"256"
         },
         "LLC Covid Ward":{
            "title":"LLC Covid Ward",
            "v1wardId":"LLCCOVIDWARD",
            "mask":"512"
         },
         "Mortury":{
            "title":"Mortury",
            "v1wardId":"MORTURY",
            "mask":"1024"
         },
         "NCU  (Neonetal Care Unit)":{
            "title":"NCU  (Neonetal Care Unit)",
            "v1wardId":"NCU",
            "mask":"2048"
         },
         "Neonatal Intensive Care unit2":{
            "title":"Neonatal Intensive Care unit2",
            "v1wardId":"NICU2",
            "mask":"4096"
         },
         "Operation Theatre":{
            "title":"Operation Theatre",
            "v1wardId":"OT",
            "mask":"8192"
         },
         "Patient Parking Area":{
            "title":"Patient Parking Area",
            "v1wardId":"PARKING",
            "mask":"16384"
         },
         "PCU  (Peadiatric Care Unit)":{
            "title":"PCU  (Peadiatric Care Unit)",
            "v1wardId":"PCU",
            "mask":"32768"
         },
         "Private Ward":{
            "title":"Private Ward",
            "v1wardId":"PVTWARD",
            "mask":"65536"
         },
         "SPPVT  (Special Private)":{
            "title":"SPPVT  (Special Private)",
            "v1wardId":"SPLPVT",
            "mask":"131072"
         },
         "Special Private":{
            "title":"Special Private",
            "v1wardId":"SPPVT",
            "mask":"262144"
         },
         "Wing 01-Female":{
            "title":"Wing 01-Female",
            "v1wardId":"W1FEMALE",
            "mask":"524288"
         },
         "Wing 01-Maternity":{
            "title":"Wing 01-Maternity",
            "v1wardId":"W1MATERNITY",
            "mask":"1048576"
         },
         "Wing 01-SP":{
            "title":"Wing 01-SP",
            "v1wardId":"W1SEMIPRIVATE",
            "mask":"2097152"
         },
         "Wing 02-Female":{
            "title":"Wing 02-Female",
            "v1wardId":"WING02",
            "mask":"4194304"
         },
         "Wing 02-Paediatric":{
            "title":"Wing 02-Paediatric",
            "v1wardId":"WING02PED",
            "mask":"8388608"
         },
         "Wing 03":{
            "title":"Wing 03",
            "v1wardId":"WING03",
            "mask":"16777216"
         },
         "Wing 04":{
            "title":"Wing 04",
            "v1wardId":"WING04",
            "mask":"33554432"
         },
         "Wing 05":{
            "title":"Wing 05",
            "v1wardId":"WING05",
            "mask":"67108864"
         },
         "Wing 06":{
            "title":"Wing 06",
            "v1wardId":"WING06",
            "mask":"134217728"
         },
         "PVTWR (Private Wad)":{
            "title":"PVTWR (Private Wad)",
            "v1wardId":"WINGPC",
            "read":4,
            "write":4,
            "mask":"268435456"
         },
         "Inactive":{
            "title":"Inactive",
            "v1wardId":"Inactive",
            "mask":"536870912"
         }
      },
      "bedclassifications":{
         "Bassinet":{
            "v1bedclassificationId":"BNT",
            "title":"Bassinet",
            "category":"Ward Type",
            "read":4,
            "write":4,
            "mask":"1"
         },
         "Birthing Room":{
            "v1bedclassificationId":"BRB",
            "title":"Birthing Room",
            "category":"Ward Type",
            "mask":"2"
         },
         "Casualty":{
            "v1bedclassificationId":"CASUALTY",
            "title":"Casualty",
            "category":"Ward Type",
            "mask":"4"
         },
         "Coronary Care Unit":{
            "v1bedclassificationId":"CCU",
            "title":"Coronary Care Unit",
            "category":"Ward Type",
            "mask":"8"
         },
         "Chemotherapy":{
            "v1bedclassificationId":"CHEMO",
            "title":"Chemotherapy",
            "category":"Ward Type",
            "mask":"16"
         },
         "Day Care":{
            "v1bedclassificationId":"DAYCAR",
            "title":"Day Care",
            "category":"Ward Type",
            "mask":"32"
         },
         "Geriatric":{
            "v1bedclassificationId":"GER",
            "title":"Geriatric",
            "category":"Ward Type",
            "mask":"64"
         },
         "Labour Room":{
            "v1bedclassificationId":"LBR",
            "title":"Labour Room",
            "category":"Ward Type",
            "mask":"128"
         },
         "High Dependency Care Unit":{
            "v1bedclassificationId":"HDU",
            "title":"High Dependency Care Unit",
            "category":"Ward Type",
            "mask":"256"
         },
         "Intensive Care Unit":{
            "v1bedclassificationId":"Intensive Care Unit",
            "title":"Intensive Care Unit",
            "category":"Ward Type",
            "mask":"512"
         },
         "High Risk Labour Room":{
            "v1bedclassificationId":"HRLBR",
            "title":"High Risk Labour Room",
            "category":"Ward Type",
            "mask":"1024"
         },
         "High Intensive Care Unit":{
            "v1bedclassificationId":"HICU",
            "title":"High Intensive Care Unit",
            "category":"Ward Type",
            "mask":"2048"
         },
         "Neonatal Intensive Care Unit":{
            "v1bedclassificationId":"NCU",
            "title":"Neonatal Intensive Care Unit",
            "category":"Ward Type",
            "mask":"4096"
         },
         "Paediatric Intensive Care Unit":{
            "v1bedclassificationId":"PCU",
            "title":"Paediatric Intensive Care Unit",
            "category":"Ward Type",
            "mask":"8192"
         },
         "With TV":{
            "v1bedclassificationId":"WTV",
            "title":"With TV",
            "category":"Amenities",
            "mask":"16384"
         },
         "With AC":{
            "v1bedclassificationId":"WAC",
            "title":"With AC",
            "category":"Amenities",
            "mask":"32768"
         },
         "General Semi Private":{
            "v1bedclassificationId":"GSP",
            "title":"General Semi Private",
            "category":"Bill Category",
            "mask":"65536"
         },
         "General":{
            "v1bedclassificationId":"GEN",
            "title":"General",
            "category":"Bill Category",
            "mask":"131072"
         },
         "Private":{
            "v1bedclassificationId":"PVT",
            "title":"Private",
            "category":"Bill Category",
            "mask":"262144"
         },
         "Delux":{
            "v1bedclassificationId":"DLX",
            "title":"Delux",
            "category":"Bill Category",
            "mask":"524288"
         },
         "VIP":{
            "v1bedclassificationId":"VIP",
            "title":"VIP",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"1048576"
         },
         "Regular":{
            "v1bedclassificationId":"Regular",
            "title":"Regular",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"2097152"
         },
         "Premium Economy":{
            "v1bedclassificationId":"Premium Economy",
            "title":"Premium Economy",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"4194304"
         },
         "Economy":{
            "v1bedclassificationId":"Economy",
            "title":"Economy",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"8388608"
         },
         "Full room":{
            "v1bedclassificationId":"FULL",
            "title":"Full room",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"16777216"
         },
         "Triple Share":{
            "v1bedclassificationId":"TIO",
            "title":"Triple Share",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"33554432"
         },
         "Twin Share":{
            "v1bedclassificationId":"TWIN",
            "title":"Twin Share",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"67108864"
         },
         "Special Private":{
            "v1bedclassificationId":"SPPVT",
            "title":"Special Private",
            "category":"Bill Category",
            "mask":"134217728"
         },
         "Male":{
            "v1bedclassificationId":"MALE",
            "title":"Male",
            "read":4,
            "category":"Gender Type",
            "mask":"268435456"
         },
         "Female":{
            "v1bedclassificationId":"FEMALE",
            "title":"Female",
            "read":4,
            "category":"Gender Type",
            "mask":"536870912"
         },
         "Other":{
            "v1bedclassificationId":"OTHGEN",
            "title":"Other",
            "read":4,
            "category":"Gender Type",
            "mask":"1073741824"
         },
         "Adult":{
            "v1bedclassificationId":"ADLT",
            "title":"Adult",
            "category":"Age Based",
            "mask":"2147483648"
         },
         "Paediatric":{
            "v1bedclassificationId":"PAD",
            "title":"Paediatric",
            "category":"Age Based",
            "mask":"4294967296"
         },
         "Neonatal":{
            "v1bedclassificationId":"NEO",
            "title":"Neonatal",
            "category":"Age Based",
            "mask":"8589934592"
         },
         "Admissible Bed":{
            "v1bedclassificationId":"ADM",
            "title":"Admissible Bed",
            "category":"Admissible Category",
            "read":4,
            "write":4,
            "mask":"17179869184"
         },
         "Non Admissible Bed":{
            "v1bedclassificationId":"NAADM",
            "title":"Non Admissible Bed",
            "category":"Admissible Category",
            "read":4,
            "write":4,
            "mask":"34359738368"
         },
         "Limited Admissible Bed":{
            "v1bedclassificationId":"LMADM",
            "title":"Limited Admissible Bed",
            "category":"Admissible Category",
            "read":4,
            "write":4,
            "mask":"68719476736"
         },
         "Infected":{
            "v1bedclassificationId":"INFECTED",
            "title":"Infected",
            "category":"Clinical",
            "read":8,
            "write":8,
            "mask":"137438953472"
         },
         "Clean":{
            "v1bedclassificationId":"CLEAN",
            "title":"Clean",
            "category":"Clinical",
            "read":8,
            "write":8,
            "mask":"274877906944"
         },
         "Isolation":{
            "v1bedclassificationId":"ISOLATION",
            "title":"Isolation",
            "category":"Clinical",
            "read":8,
            "write":8,
            "mask":"549755813888"
         },
         "Ward":{
            "v1bedclassificationId":"Ward",
            "title":"Ward",
            "category":"Uncategorized",
            "read":4,
            "write":4,
            "mask":"1099511627776"
         },
         "ICU":{
            "v1bedclassificationId":"ICU",
            "title":"ICU",
            "category":"Uncategorized",
            "read":4,
            "write":4,
            "mask":"2199023255552"
         },
         "Inactive":{
            "title":"Inactive",
            "v1bedclassificationId":"Inactive",
            "read":4,
            "write":4,
            "mask":"4398046511104"
         }
      },
      "bedoccupancyclassifications":{
         "Bassinet":{
            "v1bedclassificationId":"BNT",
            "title":"Bassinet",
            "category":"Ward Type",
            "read":4,
            "write":4,
            "mask":"1"
         },
         "Birthing Room":{
            "v1bedclassificationId":"BRB",
            "title":"Birthing Room",
            "category":"Ward Type",
            "mask":"2"
         },
         "Casualty":{
            "v1bedclassificationId":"CASUALTY",
            "title":"Casualty",
            "category":"Ward Type",
            "mask":"4"
         },
         "Coronary Care Unit":{
            "v1bedclassificationId":"CCU",
            "title":"Coronary Care Unit",
            "category":"Ward Type",
            "mask":"8"
         },
         "Chemotherapy":{
            "v1bedclassificationId":"CHEMO",
            "title":"Chemotherapy",
            "category":"Ward Type",
            "mask":"16"
         },
         "Day Care":{
            "v1bedclassificationId":"DAYCAR",
            "title":"Day Care",
            "category":"Ward Type",
            "mask":"32"
         },
         "Geriatric":{
            "v1bedclassificationId":"GER",
            "title":"Geriatric",
            "category":"Ward Type",
            "mask":"64"
         },
         "Labour Room":{
            "v1bedclassificationId":"LBR",
            "title":"Labour Room",
            "category":"Ward Type",
            "mask":"128"
         },
         "High Dependency Care Unit":{
            "v1bedclassificationId":"HDU",
            "title":"High Dependency Care Unit",
            "category":"Ward Type",
            "mask":"256"
         },
         "Intensive Care Unit":{
            "v1bedclassificationId":"Intensive Care Unit",
            "title":"Intensive Care Unit",
            "category":"Ward Type",
            "mask":"512"
         },
         "High Risk Labour Room":{
            "v1bedclassificationId":"HRLBR",
            "title":"High Risk Labour Room",
            "category":"Ward Type",
            "mask":"1024"
         },
         "High Intensive Care Unit":{
            "v1bedclassificationId":"HICU",
            "title":"High Intensive Care Unit",
            "category":"Ward Type",
            "mask":"2048"
         },
         "Neonatal Intensive Care Unit":{
            "v1bedclassificationId":"NCU",
            "title":"Neonatal Intensive Care Unit",
            "category":"Ward Type",
            "mask":"4096"
         },
         "Paediatric Intensive Care Unit":{
            "v1bedclassificationId":"PCU",
            "title":"Paediatric Intensive Care Unit",
            "category":"Ward Type",
            "mask":"8192"
         },
         "With TV":{
            "v1bedclassificationId":"WTV",
            "title":"With TV",
            "category":"Amenities",
            "mask":"16384"
         },
         "With AC":{
            "v1bedclassificationId":"WAC",
            "title":"With AC",
            "category":"Amenities",
            "mask":"32768"
         },
         "General Semi Private":{
            "v1bedclassificationId":"GSP",
            "title":"General Semi Private",
            "category":"Bill Category",
            "mask":"65536"
         },
         "General":{
            "v1bedclassificationId":"GEN",
            "title":"General",
            "category":"Bill Category",
            "mask":"131072"
         },
         "Private":{
            "v1bedclassificationId":"PVT",
            "title":"Private",
            "category":"Bill Category",
            "mask":"262144"
         },
         "Delux":{
            "v1bedclassificationId":"DLX",
            "title":"Delux",
            "category":"Bill Category",
            "mask":"524288"
         },
         "VIP":{
            "v1bedclassificationId":"VIP",
            "title":"VIP",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"1048576"
         },
         "Regular":{
            "v1bedclassificationId":"Regular",
            "title":"Regular",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"2097152"
         },
         "Premium Economy":{
            "v1bedclassificationId":"Premium Economy",
            "title":"Premium Economy",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"4194304"
         },
         "Economy":{
            "v1bedclassificationId":"Economy",
            "title":"Economy",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"8388608"
         },
         "Full room":{
            "v1bedclassificationId":"FULL",
            "title":"Full room",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"16777216"
         },
         "Triple Share":{
            "v1bedclassificationId":"TIO",
            "title":"Triple Share",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"33554432"
         },
         "Twin Share":{
            "v1bedclassificationId":"TWIN",
            "title":"Twin Share",
            "category":"Bed Type",
            "read":4,
            "write":4,
            "mask":"67108864"
         },
         "Special Private":{
            "v1bedclassificationId":"SPPVT",
            "title":"Special Private",
            "category":"Bill Category",
            "mask":"134217728"
         },
         "Male":{
            "v1bedclassificationId":"MALE",
            "title":"Male",
            "read":4,
            "category":"Gender Type",
            "mask":"268435456"
         },
         "Female":{
            "v1bedclassificationId":"FEMALE",
            "title":"Female",
            "read":4,
            "category":"Gender Type",
            "mask":"536870912"
         },
         "Other":{
            "v1bedclassificationId":"OTHGEN",
            "title":"Other",
            "read":4,
            "category":"Gender Type",
            "mask":"1073741824"
         },
         "Adult":{
            "v1bedclassificationId":"ADLT",
            "title":"Adult",
            "category":"Age Based",
            "mask":"2147483648"
         },
         "Paediatric":{
            "v1bedclassificationId":"PAD",
            "title":"Paediatric",
            "category":"Age Based",
            "mask":"4294967296"
         },
         "Neonatal":{
            "v1bedclassificationId":"NEO",
            "title":"Neonatal",
            "category":"Age Based",
            "mask":"8589934592"
         },
         "Admissible Bed":{
            "v1bedclassificationId":"ADM",
            "title":"Admissible Bed",
            "category":"Admissible Category",
            "read":4,
            "write":4,
            "mask":"17179869184"
         },
         "Non Admissible Bed":{
            "v1bedclassificationId":"NAADM",
            "title":"Non Admissible Bed",
            "category":"Admissible Category",
            "read":4,
            "write":4,
            "mask":"34359738368"
         },
         "Limited Admissible Bed":{
            "v1bedclassificationId":"LMADM",
            "title":"Limited Admissible Bed",
            "category":"Admissible Category",
            "read":4,
            "write":4,
            "mask":"68719476736"
         },
         "Infected":{
            "v1bedclassificationId":"INFECTED",
            "title":"Infected",
            "category":"Clinical",
            "read":8,
            "write":8,
            "mask":"137438953472"
         },
         "Clean":{
            "v1bedclassificationId":"CLEAN",
            "title":"Clean",
            "category":"Clinical",
            "read":8,
            "write":8,
            "mask":"274877906944"
         },
         "Isolation":{
            "v1bedclassificationId":"ISOLATION",
            "title":"Isolation",
            "category":"Clinical",
            "read":8,
            "write":8,
            "mask":"549755813888"
         },
         "Ward":{
            "v1bedclassificationId":"Ward",
            "title":"Ward",
            "category":"Uncategorized",
            "read":4,
            "write":4,
            "mask":"1099511627776"
         },
         "ICU":{
            "v1bedclassificationId":"ICU",
            "title":"ICU",
            "category":"Uncategorized",
            "read":4,
            "write":4,
            "mask":"2199023255552"
         },
         "Inactive":{
            "title":"Inactive",
            "v1bedclassificationId":"Inactive",
            "read":4,
            "write":4,
            "mask":"4398046511104"
         }
      }
   },
   "dentalmr":{
      "habits":{
         "Chewing":{
            "title":"Chewing",
            "mask":"1"
         },
         "Smoking":{
            "title":"Smoking",
            "mask":"2"
         },
         "Alchohol":{
            "title":"Alchohol",
            "mask":"4"
         },
         "Other":{
            "title":"Other",
            "mask":"8"
         }
      },
      "oralhygienestatuses":{
         "Calculus":{
            "title":"Calculus",
            "mask":"1"
         },
         "Strain":{
            "title":"Strain",
            "mask":"2"
         },
         "Debris":{
            "title":"Debris",
            "mask":"4"
         },
         "Sub-gingival-calculus":{
            "title":"Sub-gingival-calculus",
            "mask":"8"
         }
      },
      "periodontiums":{
         "Mobility":{
            "title":"Mobility",
            "mask":"1"
         },
         "GR":{
            "title":"GR",
            "mask":"2"
         },
         "PP":{
            "title":"PP",
            "mask":"4"
         },
         "BOP":{
            "title":"BOP",
            "mask":"8"
         },
         "Gingival-inflamation":{
            "title":"Gingival-inflamation",
            "mask":"16"
         }
      },
      "abbreviations":{
         "AA":{
            "title":"AA",
            "mask":"1"
         },
         "AS#":{
            "title":"AS#",
            "mask":"2"
         },
         "AP#":{
            "title":"AP#",
            "mask":"4"
         },
         "AV":{
            "title":"AV",
            "mask":"8"
         },
         "BoP":{
            "title":"BoP",
            "mask":"16"
         },
         "MA":{
            "title":"MA",
            "mask":"32"
         },
         "DA":{
            "title":"DA",
            "mask":"64"
         },
         "H":{
            "title":"H",
            "mask":"128"
         },
         "V":{
            "title":"V",
            "mask":"256"
         },
         "D1":{
            "title":"D1",
            "mask":"512"
         },
         "D2":{
            "title":"D2",
            "mask":"1024"
         },
         "D3":{
            "title":"D3",
            "mask":"2048"
         },
         "D4":{
            "title":"D4",
            "mask":"4096"
         },
         "C":{
            "title":"C",
            "mask":"8192"
         },
         "DT":{
            "title":"DT",
            "mask":"16384"
         },
         "CRF":{
            "title":"CRF",
            "mask":"32768"
         },
         "EX":{
            "title":"EX",
            "mask":"65536"
         },
         "EF":{
            "title":"EF",
            "mask":"131072"
         },
         "EDF":{
            "title":"EDF",
            "mask":"262144"
         },
         "EDP":{
            "title":"EDP",
            "mask":"524288"
         },
         "#EDP":{
            "title":"#EDP",
            "mask":"1048576"
         },
         "E":{
            "title":"E",
            "mask":"2097152"
         },
         "ED":{
            "title":"ED",
            "mask":"4194304"
         },
         "F1":{
            "title":"F1",
            "mask":"8388608"
         },
         "F2":{
            "title":"F2",
            "mask":"16777216"
         },
         "F3":{
            "title":"F3",
            "mask":"33554432"
         },
         "GH":{
            "title":"GH",
            "mask":"67108864"
         },
         "IMP":{
            "title":"IMP",
            "mask":"134217728"
         },
         "IL":{
            "title":"IL",
            "mask":"268435456"
         },
         "LL":{
            "title":"LL",
            "mask":"536870912"
         },
         "MO&DO":{
            "title":"MO&DO",
            "mask":"1073741824"
         },
         "AC":{
            "title":"AC",
            "mask":"2147483648"
         },
         "AT":{
            "title":"AT",
            "mask":"4294967296"
         },
         "BR":{
            "title":"BR",
            "mask":"8589934592"
         },
         "CR":{
            "title":"CR",
            "mask":"17179869184"
         },
         "#E":{
            "title":"#E",
            "mask":"34359738368"
         },
         "F":{
            "title":"F",
            "mask":"68719476736"
         },
         "#F":{
            "title":"#F",
            "mask":"137438953472"
         },
         "FD":{
            "title":"FD",
            "mask":"274877906944"
         },
         "GR":{
            "title":"GR",
            "mask":"549755813888"
         },
         "X":{
            "title":"X",
            "mask":"1099511627776"
         },
         "M1":{
            "title":"M1",
            "mask":"2199023255552"
         },
         "M2":{
            "title":"M2",
            "mask":"4398046511104"
         },
         "M3":{
            "title":"M3",
            "mask":"8796093022208"
         }
      },
      "teethposition":{
         "upperleft":{
            "title":"upperleft",
            "mask":"1"
         },
         "upperright":{
            "title":"upperright",
            "mask":"2"
         },
         "lowerleft":{
            "title":"lowerleft",
            "mask":"4"
         },
         "lowerright":{
            "title":"lowerright",
            "mask":"8"
         },
         "position1":{
            "title":"position1",
            "mask":"16"
         },
         "position2":{
            "title":"position2",
            "mask":"32"
         },
         "position3":{
            "title":"position3",
            "mask":"64"
         },
         "position4":{
            "title":"position4",
            "mask":"128"
         },
         "position5":{
            "title":"position5",
            "mask":"256"
         },
         "position6":{
            "title":"position6",
            "mask":"512"
         },
         "position7":{
            "title":"position7",
            "mask":"1024"
         },
         "position8":{
            "title":"position8",
            "mask":"2048"
         },
         "ischildteeth":{
            "title":"ischildteeth",
            "mask":"4096"
         }
      }
   },
   "item":{
      "ITEMCLASS":{
         "HIGHRISK":{
            "title":"HIGHRISK",
            "mask":"1"
         },
         "ANTIBIOTICUSAGE":{
            "title":"ANTIBIOTICUSAGE",
            "mask":"2"
         },
         "PURCHASABLE":{
            "title":"PURCHASABLE",
            "mask":"4"
         },
         "SERVICES":{
            "title":"SERVICES",
            "mask":"8"
         },
         "GOODS":{
            "title":"GOODS",
            "mask":"16"
         },
         "SALEABLE":{
            "title":"SALEABLE",
            "mask":"32"
         },
         "CONSUMABLE":{
            "title":"CONSUMABLE",
            "mask":"64"
         },
         "STOCKABLE":{
            "title":"STOCKABLE",
            "mask":"128"
         },
         "PHARMACEUTICALS":{
            "title":"PHARMACEUTICALS",
            "mask":"256"
         },
         "NONSTOCK":{
            "title":"NONSTOCK",
            "mask":"512"
         },
         "DISCOUNTS":{
            "title":"DISCOUNTS",
            "mask":"1024"
         },
         "GENERALITEMS":{
            "title":"GENERALITEMS",
            "mask":"2048"
         },
         "TERMS":{
            "title":"TERMS",
            "mask":"4096"
         },
         "SHEETITEMS":{
            "title":"SHEETITEMS",
            "mask":"8192"
         },
         "CAPITALITEM":{
            "title":"CAPITALITEM",
            "mask":"16384"
         },
         "PURCHASEINACTIVATED":{
            "title":"PURCHASEINACTIVATED",
            "mask":"32768"
         },
         "SALEINACTIVATED":{
            "title":"SALEINACTIVATED",
            "mask":"65536"
         }
      }
   },
   "location":{
      "locationclass":{
         "Main Store":{
            "title":"Main Store",
            "mask":"1"
         },
         "SALEABLE":{
            "title":"SALEABLE",
            "mask":"2"
         },
         "CONSUMABLE":{
            "title":"CONSUMABLE",
            "mask":"4"
         },
         "STOCKABLE":{
            "title":"STOCKABLE",
            "mask":"8"
         },
         "PHARMACEUTICALS":{
            "title":"PHARMACEUTICALS",
            "mask":"16"
         },
         "GENERAL ITEMS":{
            "title":"GENERAL ITEMS",
            "mask":"32"
         }
      }
   },
   "policy":{
      "flags":{
         "defaultpharmacynonconsultationentity":{
            "title":"defaultpharmacynonconsultationentity",
            "mask":"1"
         }
      }
   },
   "umask":{
      "description":{
         "SERVICES":{
            "title":"SERVICES",
            "mask":"1"
         },
         "CATEGORY":{
            "title":"CATEGORY",
            "mask":"2"
         },
         "GROUP":{
            "title":"GROUP",
            "mask":"4"
         },
         "CGST":{
            "title":"CGST",
            "mask":"8"
         },
         "SGST":{
            "title":"SGST",
            "mask":"16"
         },
         "IGST":{
            "title":"IGST",
            "mask":"32"
         },
         "UGST":{
            "title":"UGST",
            "mask":"64"
         },
         "PRINTED":{
            "title":"PRINTED",
            "mask":"128"
         },
         "PHARMACEUTICALS":{
            "title":"PHARMACEUTICALS",
            "mask":"256"
         },
         "UPDATED":{
            "title":"UPDATED",
            "mask":"512"
         },
         "DELETED":{
            "title":"DELETED",
            "mask":"1024"
         }
      }
   },
   "user":{
      "roles":{
         "guest":{
            "title":"guest",
            "mask":"1"
         },
         "superadmin":{
            "title":"superadmin",
            "mask":"2"
         },
         "nurseadmin":{
            "title":"nurseadmin",
            "mask":"4"
         },
         "nurse":{
            "title":"nurse",
            "mask":"8"
         },
         "bedadmin":{
            "title":"bedadmin",
            "mask":"16"
         }
      }
   }
};

var m_common = commonmasks ;

var helpers$1 = {
  
    islengthgreaterthan : function(value, maxlength){
      if(value && value.length < maxlength){
        return true;
      }
      else {
        return false;
      }
    }
    , 
    isnumbercheck : function (value) {
      if ( typeof(value) === 'string' || typeof(value) === 'number') {
        var re = new RegExp(/^[0-9]+$/);
        if (re.test(value) ) {
          return true;            
        } 
        else {
          return false;
        }
        }
        else {
          return false
        }
    }
    ,
    isintcheck : function (value) {
      if ( typeof(value) === 'string' || typeof(value) === 'number') {
        var re = new RegExp(/^[1-9]\d*$/);
        if (re.test(value) ) {
          return true;            
        } 
        else {
          return false;
        }
        }
        else {
          return false
        }
    }
    ,
    isguidcheck : function (value) {
      if ( typeof(value) === 'string' || typeof(value) === 'number') {
    //   var re = new RegExp(/^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i);
      var re = new RegExp('^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$', 'i');
      if (re.test(value) ) {
        return true;            
      } 
      else {
        return false;
      }
      }
      else {
        return false
      }
    }
  };
  
  var validationhelpers =  helpers$1;

try {
  var x = BigInt(0);
}
catch(e){
  console.warn('BigInt check failed. Falling back to Number');
  // PB : TODO -- All Number issues with bitmasks will fail since BigInt is not available. 
    // Eg : Older Safari versions will not work
    // PB : TODO -- provide a proper polyfill for older Safari Browsers in the ember build.
  BigInt = Number;
}

// -------------------------------
// Command line option parsing
// -------------------------------
function cliargs$1(args, opts) {
  if (!opts) opts = {};
  
  var flags = { bools : {}, strings : {}, unknownFn: null };

  if (typeof opts['unknown'] === 'function') {
      flags.unknownFn = opts['unknown'];
  }

  if (typeof opts['boolean'] === 'boolean' && opts['boolean']) {
    flags.allBools = true;
  } else {
    [].concat(opts['boolean']).filter(Boolean).forEach(function (key) {
        flags.bools[key] = true;
    });
  }
  
  var aliases = {};
  Object.keys(opts.alias || {}).forEach(function (key) {
      aliases[key] = [].concat(opts.alias[key]);
      aliases[key].forEach(function (x) {
          aliases[x] = [key].concat(aliases[key].filter(function (y) {
              return x !== y;
          }));
      });
  });

  [].concat(opts.string).filter(Boolean).forEach(function (key) {
      flags.strings[key] = true;
      if (aliases[key]) {
          flags.strings[aliases[key]] = true;
      }
   });

  var defaults = opts['default'] || {};
  
  var argv = { _ : [] };
  Object.keys(flags.bools).forEach(function (key) {
      setArg(key, defaults[key] === undefined ? false : defaults[key]);
  });
  
  var notFlags = [];

  if (args.indexOf('--') !== -1) {
      notFlags = args.slice(args.indexOf('--')+1);
      args = args.slice(0, args.indexOf('--'));
  }

  function argDefined(key, arg) {
      return (flags.allBools && /^--[^=]+$/.test(arg)) ||
          flags.strings[key] || flags.bools[key] || aliases[key];
  }

  function setArg (key, val, arg) {
      if (arg && flags.unknownFn && !argDefined(key, arg)) {
          if (flags.unknownFn(arg) === false) return;
      }

      var value = !flags.strings[key] && isNumber(val)
          ? Number(val) : val
      ;
      setKey(argv, key.split('.'), value);
      
      (aliases[key] || []).forEach(function (x) {
          setKey(argv, x.split('.'), value);
      });
  }

  function setKey (obj, keys, value) {
      var o = obj;
      keys.slice(0,-1).forEach(function (key) {
          if (o[key] === undefined) o[key] = {};
          o = o[key];
      });

      var key = keys[keys.length - 1];
      if (o[key] === undefined || flags.bools[key] || typeof o[key] === 'boolean') {
          o[key] = value;
      }
      else if (Array.isArray(o[key])) {
          o[key].push(value);
      }
      else {
          o[key] = [ o[key], value ];
      }
  }
  
  function aliasIsBoolean(key) {
    return aliases[key].some(function (x) {
        return flags.bools[x];
    });
  }

  for (var i = 0; i < args.length; i++) {
      var arg = args[i];
      
      if (/^--.+=/.test(arg)) {
          // Using [\s\S] instead of . because js doesn't support the
          // 'dotall' regex modifier. See:
          // http://stackoverflow.com/a/1068308/13216
          var m = arg.match(/^--([^=]+)=([\s\S]*)$/);
          var key = m[1];
          var value = m[2];
          if (flags.bools[key]) {
              value = value !== 'false';
          }
          setArg(key, value, arg);
      }
      else if (/^--no-.+/.test(arg)) {
          var key = arg.match(/^--no-(.+)/)[1];
          setArg(key, false, arg);
      }
      else if (/^--.+/.test(arg)) {
          var key = arg.match(/^--(.+)/)[1];
          var next = args[i + 1];
          if (next !== undefined && !/^-/.test(next)
          && !flags.bools[key]
          && !flags.allBools
          && (aliases[key] ? !aliasIsBoolean(key) : true)) {
              setArg(key, next, arg);
              i++;
          }
          else if (/^(true|false)$/.test(next)) {
              setArg(key, next === 'true', arg);
              i++;
          }
          else {
              setArg(key, flags.strings[key] ? '' : true, arg);
          }
      }
      else if (/^-[^-]+/.test(arg)) {
          var letters = arg.slice(1,-1).split('');
          
          var broken = false;
          for (var j = 0; j < letters.length; j++) {
              var next = arg.slice(j+2);
              
              if (next === '-') {
                  setArg(letters[j], next, arg);
                  continue;
              }
              
              if (/[A-Za-z]/.test(letters[j]) && /=/.test(next)) {
                  setArg(letters[j], next.split('=')[1], arg);
                  broken = true;
                  break;
              }
              
              if (/[A-Za-z]/.test(letters[j])
              && /-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
                  setArg(letters[j], next, arg);
                  broken = true;
                  break;
              }
              
              if (letters[j+1] && letters[j+1].match(/\W/)) {
                  setArg(letters[j], arg.slice(j+2), arg);
                  broken = true;
                  break;
              }
              else {
                  setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg);
              }
          }
          
          var key = arg.slice(-1)[0];
          if (!broken && key !== '-') {
              if (args[i+1] && !/^(-|--)[^-]/.test(args[i+1])
              && !flags.bools[key]
              && (aliases[key] ? !aliasIsBoolean(key) : true)) {
                  setArg(key, args[i+1], arg);
                  i++;
              }
              else if (args[i+1] && /true|false/.test(args[i+1])) {
                  setArg(key, args[i+1] === 'true', arg);
                  i++;
              }
              else {
                  setArg(key, flags.strings[key] ? '' : true, arg);
              }
          }
      }
      else {
          if (!flags.unknownFn || flags.unknownFn(arg) !== false) {
              argv._.push(
                  flags.strings['_'] || !isNumber(arg) ? arg : Number(arg)
              );
          }
          if (opts.stopEarly) {
              argv._.push.apply(argv._, args.slice(i + 1));
              break;
          }
      }
  }
  
  Object.keys(defaults).forEach(function (key) {
      if (!hasKey(argv, key.split('.'))) {
          setKey(argv, key.split('.'), defaults[key]);
          
          (aliases[key] || []).forEach(function (x) {
              setKey(argv, x.split('.'), defaults[key]);
          });
      }
  });
  
  if (opts['--']) {
      argv['--'] = new Array();
      notFlags.forEach(function(key) {
          argv['--'].push(key);
      });
  }
  else {
      notFlags.forEach(function(key) {
          argv._.push(key);
      });
  }

  return argv;
}
/*
Iterable task should return either truthy or false  
Any fn will return only one value for an array of iterables. If any one iterable fails, the return value would be false.
 If all succeed , the return value will be true.
 If continueOnFailure is false, an execption is raised on any one failure  
*/
var any$1 = function(iterable, continueOnFailure, stopOnFirstSucces) {
  var cancelsignal = Symbol();
  return iterable.reduce( 
      function(p, tasq, i ,a) {
          var handleError = function(error, pVal){
            if(error !== cancelsignal) {
              console.log(`E3 : i = ${i} `);
              console.dir(p);
              if(i>0 && a[i-1].info) console.dir(a[i-1].info);
              console.error(a[i-1]);
              a[i-1] ? console.log("tasq : " + a[i-1].toString()) : null;

              if(error.result) console.error(error.result);
              console.error('Error : ' + (error.message || error.messages) + ' -- ' + JSON.stringify(pVal));
              console.error('Error : ' + error.stack);
              tasq ? console.log("tasq : " + tasq.toString()) : null;
              console.log('debugData 3-------------------------');
              if(!continueOnFailure) {console.log("Cancelling remaining on any one failure ..."); throw cancelsignal}
              else return { error, pVal}
            }
            else throw cancelsignal;
          };

          if(Promise.resolve(p) === p ) {
            if(i>0 && a[i-1].info) p.info = a[i-1].info;
            var trycall = function(tasq){
              try { 
                var result = tasq(); // PB : TODO -- Handle scope for call 
                if(tasq.resultHandler) return tasq.resultHandler(result)
                // if(!result) throw result; // Default failure detection for functions is falsy values. 
                return result 
              } catch (error) {
                console.error(error);
                console.error('Error : ' + error ? error.stack : 'No stack');
                if(!continueOnFailure) throw error; // PB : TODO -- Support array of results for any with or without continueonfailure.
              }
            };
            
            return p.then( function(pVal){
              // Falsy values are no longer treated as task failure exceptions. Specially for Promises. 
              // Even tasq function wrappers are required to return promises that eventually either resolve or reject..
              // Failures are known for promises on reject.
              // In future if we support direct sync function execution with a result examination for failure 
              // we could examine the result of the function as falsy's... or a result evaluator handler needs to be passed in... 
              // if(!pVal) handleError({ error : true, message : 'Failed without result' }, pVal)

              // Truthy values are failures if obj has error=true.

              var handleNext = function(rVal){
                if(stopOnFirstSucces && i > 0 && Object.prototype.toString.call(rVal) !== '[object Object]') return rVal;

                if(stopOnFirstSucces && i > 0 && !rVal.error) return rVal
                console.log('Task finished with result : ' + JSON.stringify(rVal));
                if(i>0 && a[i-1].info) console.dir(a[i-1].info);
                if(!tasq && !continueOnFailure) { console.log('Error : No task specified.'); throw false;}
                else if(!tasq) { console.log('Error : No task specified.'); return false;}
                return (Promise.resolve(tasq) === tasq ) ? tasq : trycall(tasq) ;
              };

              if(pVal && pVal.error) {
                if(continueOnFailure) return handleNext(pVal)
                else return handleError(pVal.error, pVal)
              }

              if(Promise.resolve(pVal) === pVal) {
                // Passed in function retured a promise. We still need to wait for it.
                return pVal //.then(function(rVal){ return handleNext(rVal); })
              }
              else return handleNext(pVal)
                
            })['catch'](function(error) {
              return handleError(error, null)
            })  
          }
          // else if(!p) {
          //   handleError({ error : true, message : 'Failed without result' }, pVal)
          //   console.log("Bypass remaining on prior failure");
          //   return false; // All remaining tasks will return false in the any results even if they are promisies still running or functions not initiated.
          // }
          else return p; // A truthy value 
      }
      , Promise.resolve(true)
  );
};

function hasKey (obj, keys) {
  var o = obj;
  keys.slice(0,-1).forEach(function (key) {
      o = (o[key] || {});
  });

  var key = keys[keys.length - 1];
  return key in o;
}

function isNumber (x) {
  if (typeof x === 'number') return true;
  if (/^0x[0-9a-f]+$/i.test(x)) return true;
  return /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x);
}

//Rounds down function
// num - Value to rounddown, value - rounddown by 
function g_round(num, value) {
  num = parseFloat(num);
  if( num % value == 0){ num = Math.ceil(num/value) * value;}
  else { num = Math.ceil(num/value) * value - value; }
  return Math.round(num)
}

//Precision rounding function
// Num - Value to roundoff, value - decimal precision (Ex: 10 - 1 decimal points, 100 - 2 decimal points)
function p_round(num, value) {
  return Math.round((num + Number.EPSILON) * value) / value
}

// {{from}}, {{to}}
// 	-- Extraday bounding range limits
// 	-- null => no bounds => infinite past for {{from}} and infinite future for {{to}}

// 	{{recurring}} === 0 there is no frequency or pattern that repeats within the bounded range.
// 		-- Therefore the bounded range is the SINGULAR event
// 		-- => {{start}} === {{from}} and {{end}} === {{to}}

// {{recurring}} = {{pattern}} 
//    Many envents either recurring at a regular or irregular extraday frequency specified by bits in {{recurring}}.
        // => pattern defines the frequency. pattern is limited to frequencies >= 1 day.
// 		-- A paterrn of all bits daysbits or datesbits turned on is all days.
//        Example: {{from}} === null, {{to}} === null, recurring ==== 0b111111 is all days.
//          Additional Time and frequence information will be found in 
//          {{start}}, {{end}}, {{for}} {{every}} {{duration???}} 

// -- Irregular Time Patterns within a day are currently not supported but can be supported 
//      by another intraday recurring pattern mask {{recurrence To be appropriately renamed}}. 
//          hour(24bits), min(60 bits), sec(60bits), ms(1000bits ???) match.
//            -- ms pattern matches to support irregular patterns like 3rd 20th and 908th ms may not be very useful but can be accomodated in the desgin if required.

// -- All offsets are datetime offsets from 1st Jan 1900 ( SQL Server )

// {{repeat}} -- is a repeated  offset from an anchor. {{from}}, {{start}} are the only anchors.
// {{period}} -- if period is specified {{end}} is computed as (n-1)*{{repaat}} + {{period}} <= {{to}} boundary. Where n is the number of occurences.
  // It is preferred for {{end}} to always be computed since we need to explode all events to qualify them wth the pattern anyway.

// {{start}}, {{end}} offsets defining a window with or without a datetime anchor = {{from}} or queried @from normalized to UTC begining of day.
  // -- {{start}} -- Anchored offset to {{from}} or UTC begining of day > queried @from.  
    // -- Eg: +8:00 hours from anchor every 24 hours --- {{start}} = 8:00 {{repeat}} = 24hours.
// => implicitly a recurring repeating subdivision of {{from}} and {{to}} -- defaults to every day if {{every}} is not specified.
// -- for which day ? => at a minimum {{from}} should not be null 
// -- If no {{from}} and {{to}} are specifed => unbounded  so applicable from current date in a windowed form to past and future.
//      -- We only present a windowed set of events for the range being queried. 
//     -- Need not be communicated to the client in exploded form. It is the clients responsibility to explode events for presentation.
// -- Usually an Intraday bounding range but can span multiple days.   
// -- {{recurring}} => filtered by those extraday patterns bound or unbound.
// -- IMPORTANT NOTE : {{recurring}} is not essential for a recurring event.
          // A recurring pattern is only one way of defining a recurring event mostly irregular patterns.
          // A recurring event with regular intervals can be defined using {{every}} starting at {{start}} or {{from}} if start is not defined.
// -- {{recurring}} === 0
//      => no pattern but can be recurring, if subdivisions will not repeat beyond {{start}} and {{end}} at an extraday frequency. 
//        -- But could be either a single event or an intraday repeating pattern for longer than a single day.
//        -- Since there is no extraday recurring pattern there is nothing to filter for days dates months.
//        -- {{start}} and {{end}} can span multiple consecutive days with or without an extraday pattern.
//           -- specified by the duration between {{start}} and {{end}} from 1st Jan 1970 to whenever {{end}} is. 
// -- single events are better specified as {{from}} and {{to}}
//      -- instead of {{from}} {start} {{end}} which is interpreted equivalent.
// -- {{every}} => intraday regular frequency of every
//    -- Eg : 2 hours
// -- {{for}} => for a period of 
//    -- Eg : 75 minutes
//    -- {{for}} !== {{every}} provision for intermediate gaps or pauses in the regular {{every}} frequency
// -- {{duration}} => with an event duration of 
//    -- Eg : 15 minutes  
//      -- equally distributed and occupying {{for}} without intermediate gaps
//      -- provides for a 3rd level further subdivision at {{for}} without any intermediate gaps.
//      -- {{for}} === {{every}} => {{every}} subdivision has no gaps
//      -- {{duration}} === null => no subdivision of {{for}} => {{for}} is the event
//      -- {{for}} === null => no subdivision of {{every}} {{every}} is itself the event
// -- Eg : {{start}} = 8:12am 519ms, {{end}} = 8:00pm, {{every}} = 1 hour 6mins 20ms, {{for}} = 13 minutes 5 ms
    // -- PB : TODO -- Do we need an n {{occurences}} limit ? which possibly makes {{end}} redundant. System will pick whichever is earlier.
    // -- Note : It is not possible for {{for}} to repeat and occupy all of {{for}} with equal subdivision
    //        However same effect can achived with {{duration}} which occupieas all of {{for}} with {{for}}==={{every}}
// 
// -- Irregular intraday time frequencies. See discussion above.

// {{quota}} -- quota limit at event. PB : TODO -- Is this required? 
      // The same effect can be achieved with a subdivision of granular time slots
      // However qty will actually be computationally more efficient and address subdivision issues where fractions don't round up properly...
      
// {{available}} 
// -- 0 => Unavialability Pattern
// -- 1 => Availability Pattern

// -------------------------------------------------------------------
// timeUtils
const daysbits = 7;
const datesbits = 31;
const monthsbits = 12;

// 2**53-1 (+/-) is largest integer precision for 64 bit floating point IEE 754
// 7 + 31 + 12 = 50 bits which fits. 
const datebitOffset = daysbits;
const monthbitOffset = datesbits + daysbits; // Months are 0 based. So we need  to offeset by 1 more so 31st is not overrwritten.

const monthsMask = 0b111111111111 * 2** (monthbitOffset);
const datesMask = 0b1111111111111111111111111111111 * 2 ** (datebitOffset);
const daysMask = 0b1111111;

var timeUtils = {
  // PB : TODO -- Currently assuming event e1 is a sub 1 day duration. Which may not be true.
  toRecurringPattern( event ){
    var dayBitToSet = event.from.getDay(); // 0 based Index
    var dateBitToSet = event.from.getDate() + datebitOffset - 1;  // Dates are 1 based.
    var monthBitToSet = event.from.getMonth() + monthbitOffset;  // 0 based

    var recurring = 2**dayBitToSet + 2**dateBitToSet + 2**monthBitToSet;
    // PB : TODO -- loop through all matching masks until the end. 
    return {
          from : event.from, to : event.to, recurring: recurring
        , start: new Date ( event.from - new Date( moment(event.from).startOf('day') ) )
        , end: new Date ( event.to - new Date( moment(event.to).startOf('day') ) )
    }
  }
  , getSkipFunction(r, boundedRange){
    var areMonthsSelected = monthsMask & r.recurring;
    var areDatesSelected = datesMask & r.recurring;
    var areDaysSelected = daysMask & r.recurring;

    if(!areMonthsSelected && !areDatesSelected && !areDaysSelected) {
      console.error("Null patterns are useless for selection. This is probably not a recurring pattern");
      return null;
    }

    var filter = { from : boundedRange && boundedRange.from || new Date(moment().startOf('day')), to : boundedRange && boundedRange.to };

    // Returns how much to skip for next available value for a dimension.
    var reset = Symbol('reset');
    var stop = Symbol('stop');
    var skipFn = {
      create : (options)=>{
        var startFrom = options.startFrom;
        options.nBits;
        return {
            originOffset : null // From the origin.
          , getSkipGenerator : (selected)=>{
            var startOffset = null;  // From position to start from.
            
            // var cycleEntryPoint = null;
            var nextCycleIndex = 0;
            var incrementCycle = [];
            var previous = 0;
            // Discover the cycle from the bitmask.
            for(var b = 0; b < nBits; b++) {
              if(selected & 1) {
                if(utils.js.isNull(originOffset)) this.originOffset = b; 
                if(utils.js.isNull(startOffset) && (startFrom - b) <= 0){
                  // startOffset cannot be negative. cycleEntryPoint is from the origin and is the entrypoint when there is no fitler.from...
                  startOffset = b - startFrom; // As measured from filter.from i.e from startingPoint
                  // cycleEntryPoint = b
                  nextCycleIndex = incrementCycle.length-1; // The place to enter cycle after startoffset aligns to currentCycleIndex.
                }                
                incrementCycle.push(1 + b - previous); // We keep pushing and then splice in the first item as the last item to make this cyclical.
                previous = 1 + b; // Minimum incrment is always 1; 
              }
            }
            // Due to the cyclical nature incrementCycle[0] has the increment to the second item 
            // and incrementCycle[incrementCycle.length-1] points to first item in cycle. 
            incrementCycle.push(incrementCycle.splice(0,1));
            if(nextCycleIndex < 0) nextCycleIndex = 0;
            return function*(){
              var signal = false;
              signal = yield startOffset; // Could be 0. Aligns to the first match in the cycle after from.
              var i = nextCycleIndex;
              for(;;){
                for(; i < incrementCycle.length; i++ ) {
                  signal = yield incrementCycle[i];
                  if(reset === signal) { signal = yield this.originOffset; break; }
                  if(signal === stop || signal.done) return null;
                }
                i = 0;
              }
            }
          }

          // Generator for Irregular boundaries.
          , getNextDateGenerator(selection){
            var iterator = this.getSkipGenerator(selection);
            
            return function*(){
              var nextPotentialDate = moment(potentialDate).add(iterator.next(), 'd');
              if(nextPotentialDate.month() !=  potentialDate.getMonth()) {
                // Handle month boundary increments. 
                nextPotentialDate.startOf('month').add(dateIterator.next(reset), 'm'); 
              }
              var potentialDate = nextPotentialDate;
              yield nextPotentialDate;
            }
          }
          // Cyclical Generator.
          , getNextGenerator(options, selection){
            this.getSkipGenerator(selection);
            var next = filter.from;
            
            return function*(){
              yield next = moment(next).add(dayIterator.next(), 'd');
            }
          }
        }
      }
    };
    var monthSkipper = skipFn.create({ nBits : monthsbits, startFrom : filter.from.getMonth() });
    var daySkipper = skipFn.create({ nBits : daysbits, startFrom : filter.from.getDay() });
    var dateSkipper = skipFn.create({ nBits : datebits, startFrom : filter.from.getDate()-1 }); // Skipfn requires a 0 based startFrom.

    if(!areMonthsSelected && !areDatesSelected)  return daySkipper(areDaysSelected)
    else if(!areDatesSelected && !areDaysSelected)  return monthSkipper(areMonthsSelected/2**(datesbits + daysbits))
    else if(!areMonthsSelected && !areDaysSelected) return dateSkipper(areDatesSelected/2**(daysbits))
    else {
      if(!areMonthsSelected) {
        // Dates, Days are selected.
        return function*(){

          var dateIterator = dateSkipper.getNextDateGenerator({ nBits : datebits, startFrom : filter.from.getDate()-1 }, areDatesSelected/2**(daysbits));
          var dayIterator = daySkipper.getNextGenerator({ nBits : daysbits, startFrom : filter.from.getDay() }, areDaysSelected);
          
          var potentialDay = null;
          var potentialDate = dateIterator.next();  // Irregular cycle end...
          if(isAnd) {
            // Both day and date shuld match.
            for(;;){

              for(; (potentialDay = dayIterator.next()) < potentialDate ;); 
              // PB : TODO -- If we never hit the equals condition this will be a perpetual loop.
                // If both are integer skips we will have a LCM and therefore hit this condition.
                // In the case of sets of irregular skips we still will have the sum of each set also have an LCM.
                // However for irregular boundaries we cannot predict whether an LCM exists and if a equality condition will ever be met. 
                // In such cases we need to protect from an infinite loop that will never yield.
                // For dates though despite the irregular boundaries the pattern is that every date, month combination falls on every day of week. 
              if(potentialDay == potentialDate) {
                yield potentialDay;
                potentialDate = dateIterator.next();
                continue;
              }
              for(; (potentialDate = dateIterator.next()) < potentialDay;); 
            }
          }
          else {
            
            for(;;){

              for(; (potentialDay = dayIterator.next()) < potentialDate ;) {
                if(stop === (yield potentialDay)) return null;
              }
              if(potentialDay == potentialDate) { 
                potentialDate = dateIterator.next();
                continue;  // We need to yield in sorted sequence.
              }
              for(; (potentialDate = dateIterator.next()) < potentialDay;) {
                if(stop === (yield potentialDate)) return null;
              }
            }
          }
        }
      }

    }
  }
  , skipThisRecurrable : Symbol('skipThisRecurrable')
  , stopThisIterator : Symbol('stopThisIterator')
  , toEvents( r, boundedRange){
    if(!boundedRange.to) throw 'toEvents requires a bounded Range with an end to terminate. Use generater for unbounded operations'
    ({ from : boundedRange.from || new Date(moment(new Date()).startOf('day')), to : boundedRange.to });
  }
  , jsstart : function(){
    return  new Date(moment(new Date(0)).startOf('day')) //1st Jan 1970 12AM local time
  }
  // Returns the whole event that is qualified even by a partial intersection.
  , getEventGenerator : function* (objOrArray, boundedRange, getEvent) { 
    

    getEvent = getEvent || function(r, startOfDayFrom, start, end) {
      var event = Object.assign( {}, r);  
      delete event.recurring;


      event.from = new Date (startOfDayFrom.getTime() + start.getTime() + utils.getTZOffsetMilliseconds() );
      event.to = new Date ( startOfDayFrom.getTime() + end.getTime() + utils.getTZOffsetMilliseconds());
      // { from : new Date ( startOfDayFrom.getTime() + start.getTime() ) , to : new Date ( startOfDayFrom.getTime() + end.getTime()) }
      return event
    };

    var recurrables = utils.js.isObject(objOrArray) ? [objOrArray] : objOrArray;

    // We need to start somewhere. We dont need an end as we keep generating perpetually.
    var filter = { from : boundedRange && boundedRange.from || new Date(moment().startOf('day')), to : boundedRange && boundedRange.to };
    for(var gIdx=0; gIdx < recurrables.length; gIdx++){
      // Explode eachRecurrable to list of qualified events
      var eachRecurrable = recurrables[gIdx]; // eachRecurrable -> Recurrable event (eg)  
      if( eachRecurrable.to && eachRecurrable.to <= filter.from ) continue; // Disjoint. No need to generate. Usually a past recurring pattern.
      
      var startFrom = filter.from;
      
      if( eachRecurrable.from) {
        if(filter.to && filter.to <= eachRecurrable.from ) continue; // Disjoint.
        if(eachRecurrable.from >= filter.from) startFrom = eachRecurrable.from;
      }
      
      var startOfDayFrom = new Date( moment(startFrom).startOf('day') ); // PB : TODO -- IMP pattern TZ...
      var next = null;

      var stopAt = eachRecurrable.to ? filter.to ? Math.min(filter.to, eachRecurrable.to) : eachRecurrable.to : filter.to ? filter.to : false;
      var shouldStop = stopAt ? ()=>{ return option === this.skipThisRecurrable || next.from >= stopAt } : ()=>{ return option === this.skipThisRecurrable || false }; // Perpetual callee can stop asking for next()..

      // time recurring patterns are sorted and sequential so there is no chance we  will find any more after end.
      // which implies there is no need to test the rest of the recurring patterns until end of the boundary
      if(filter.to && eachRecurrable.to) {
        var stopAt = new Date(Min(filter.to, eachRecurrable.to));
        shouldStop = ()=>{ return option === this.skipThisRecurrable || (stopAt <= next.to ? stopAt : false) };
      }

      var start = eachRecurrable.start || this.jsstart();
      var end = eachRecurrable.end || new Date(moment(start).add(1, "d"));

      var option = true;
      next = getEvent(eachRecurrable, startOfDayFrom, start, end);

      while( !shouldStop() ) {  
        // PB : TODO -- If we provide an impossible pattern match we will perpetually not match and end up in an infinite loop.
        var patternMatched = this.__hasPatternIntersection(next, eachRecurrable);
        if(patternMatched) option =  yield next;
        if(option === this.stopThisIterator) return null;
        // PB : TODO -- Instead of checking every day skip straightaway to the next sequential pattern match.
        startOfDayFrom = new Date( moment(startOfDayFrom).add(1, 'd') ); 
        next =  getEvent(eachRecurrable, startOfDayFrom, start, end);
      } 
    }
  }
  
  // PB : TODO -- Generator that returns a series of intersections events. 
  // , recurringIntersectionsG : ()=>{}

  , isEvent : function(obj){
    return !obj.recurring 
  }
  , isRecurringPattern : function(obj){
    return obj.recurring 
  }
  , hasEventIntersection( e1Orr1, e2Orr2 ){
    return utils.timeUtils.isEvent(e1Orr1) && utils.timeUtils.isRecurringPattern( e2Orr2 ) ?  utils.timeUtils.__recurringHasIntersection( e1Orr1, e2Orr2 )
      : utils.timeUtils.isEvent(e2Orr2 ) && utils.timeUtils.isRecurringPattern( e1Orr1  ) ? utils.timeUtils.__recurringHasIntersection( e2Orr2, e1Orr1 )
      : utils.timeUtils.isEvent(e1Orr1) && utils.timeUtils.isEvent(e2Orr2) ? utils.timeUtils.__hasEventIntersection( e1Orr1, e2Orr2 )  
      : utils.timeUtils.__willPatternsIntersect( e1Orr1, e2Orr2 ) //(()=>{throw 'PB : TDOO -- To Be implemented'})()
  }

  , __hasPatternIntersection( e1, p2 ){

    var areMonthsSelected = monthsMask & p2.recurring;
    var areDatesSelected = datesMask & p2.recurring;
    var areDaysSelected = daysMask & p2.recurring;

    // PB : TODO -- Gaurd against impossible patters like 29th Feb, 31st April  etc...

    if(!areMonthsSelected && !areDatesSelected && !areDaysSelected) {
      console.error("Null patterns are useless for selection. This is probably not a recurring pattern");
      return null; // Null patterns result in null intersection.
    }

    var isAnd = false;
    if(!areMonthsSelected && !areDatesSelected || !areMonthsSelected && !areDaysSelected || !areDatesSelected && !areDaysSelected ) ;
    else {
      isAnd = p2.isAnd;
    }

    var p1 = this.toRecurringPattern(e1);
    var patternMatched = p1.recurring & p2.recurring;
    // In the and case asserts if p1 is a subset of p2 not the other way around. A recurring pattern should always be a superset of an event. 
    // And that is what is being queried... for any degree of usefulness.
    return ( isAnd ?  p1.recurring === patternMatched : patternMatched ); 
    // returns truthy pattern that intersects.
  }

  , __willPatternsIntersect( p1, p2 ){

    if(p1.from && p2.to && p2.to <= p1.from) return false;
    if(p2.from && p1.to && p1.to <= p2.from) return false;
    
    var areMonthsSelected = monthsMask & p2.recurring;
    var areDatesSelected = datesMask & p2.recurring;
    var areDaysSelected = daysMask & p2.recurring;

    // PB : TODO -- Gaurd against impossible patters like 29th Feb, 31st April  etc...

    if(!areMonthsSelected && !areDatesSelected && !areDaysSelected) {
      console.error("Null patterns are useless for selection. This is probably not a recurring pattern");
      return null; // Null patterns result in null intersection.
    }

    var isAnd = false;
    if(!areMonthsSelected && !areDatesSelected || !areMonthsSelected && !areDaysSelected || !areDatesSelected && !areDaysSelected ) ;
    else {
      isAnd = p2.isAnd;
    }

    var areP1MonthsSelected = monthsMask & p1.recurring;
    var areP1DatesSelected = datesMask & p1.recurring;
    var areP1DaysSelected = daysMask & p1.recurring;

    // PB : TODO -- Gaurd against impossible patters like 29th Feb, 31st April  etc...

    if(!areP1MonthsSelected && !areP1DatesSelected && !areP1DaysSelected) {
      console.error("Null patterns are useless for selection. This is probably not a recurring pattern");
      return null; // Null patterns result in null intersection.
    }

    var isP1And = false;
    if(!areP1MonthsSelected && !areP1DatesSelected || !areP1MonthsSelected && !areP1DaysSelected || !areP1DatesSelected && !areP1DaysSelected ) ;
    else {
      isP1And = p1.isAnd;
    }

    
    if(isAnd && isP1And === isAnd ) {
      return p1.recurring === p2.recurring;
    }
    else if(isAnd) {
      matchtarget = p2.recurring ;
    }
    else if(isP1And ) {
      matchtarget = p1.recurring ;
    }

    var patternMatched = p1.recurring & p2.recurring;
    // In the and case asserts if p1 is a subset of p2 not the other way around. A recurring pattern should always be a superset of an event. 
    // And that is what is being queried... for any degree of usefulness.

    var __patternMatched =  ( isAnd || isP1And ?  matchtarget === patternMatched : patternMatched ); 

    if(__patternMatched) {
      if(p1.start && p2.end && p2.end <= p1.start) return false;
      if(p2.start && p1.end && p1.end <= p2.start) return false;

      return true;

    }
    else {
      return false
    }    
    // returns truthy pattern that intersects.
  }
  , __recurringHasIntersection(e1, r1){

    // PB : TODO -- Date patterns UTC or Local ? i.e does a Monday mask match UTC Mondays or Local Mondays ????
    // PB : TODO -- Use recunrence generator insteadof startOf today hack based on simplified same day start end assumptions.
    if(e1.from && r1.to && r1.to <= e1.from) return false;
    if(r1.from && e1.to && e1.to <= r1.from) return false;
    // Returns intersection or false.
    return ( utils.timeUtils.__hasPatternIntersection(e1, r1) ) ? (()=>{
        // new Date ( new Date( this.rdata.get('unavailablefrom') ) - new Date( moment().startOf('day') ) )

        var startOfe1 = new Date( moment(e1.from).startOf('day') ); 
        var r1E = { 
            from: new Date(startOfe1.getTime() + r1.start.getTime() + utils.getTZOffsetMilliseconds() )
          , to: new Date(startOfe1.getTime() + r1.end.getTime() + utils.getTZOffsetMilliseconds() )
        };
        // SAM : TODO -- Verify and enable this code.
        // if(r1.from && r1E.from <= r1.from) r1E.from = r1.from;
        // if(r1.to && r1E.to >= r1.to) r1E.to = r1.to;
        return utils.timeUtils.__hasEventIntersection(e1, r1E) 
      })()
      : false
  }

  // Checks if two non recurring i.e singular events intersect and if so returns the actual intersection.
  , __hasEventIntersection(e1, e2){

    // PB : TODO -- No assertions for invalid inputs e.from is expected to be <= e.to
    if(!e1.from && !e1.to) return e2;
    if(!e2.from && !e2.to) return e1;

    var e1FromAnde2To = e1.from && e2.to;
    var e2FromAnde1To = e2.from && e1.to;
    
    var __aFrombTo = (a, b)=>{ 
      // boundary value overlap is insufficient for intersection. At least 1 millisecond diff is required.
      return (a.from >= b.to ? false
        : a.to && a.to > b.to || !a.to ? 
              { from : b.from && b.from > a.from ? b.from : a.from, to : b.to }
            : b.from && b.from >= a.to ? false : { from : b.from && b.from > a.from ? b.from : a.from, to : a.to }  
      )
    };

    var result =   e1FromAnde2To ? __aFrombTo(e1, e2)
      :( e2FromAnde1To ? __aFrombTo(e2, e1)
        : /* e1FromAnde2To is false and e2FromAnde1To is false => either both froms or both tos exist */
          e1.from ? { from: new Date(Math.max(e1.from, e2.from)) } : { to: new Date(Math.min(e1.to, e2.to)) });
    
    return result
  }

  , exludeIntersection(freeTimes, e) {
    // Removal of unavilable times will split and splice into the same freeTimes array.
    for(var i =0; i < freeTimes.length; i++) {
      var intersection = timeUtils.hasEventIntersection(freeTimes[i], e);
      if(intersection) {
        // Edit freetime to correct for current collision.
        if(freeTimes[i].from >= intersection.from && freeTimes[i].to <= intersection.to) {
          freeTimes.splice(i,1); i = i-1;
        }
        else {
          var right = Object.assign({}, freeTimes[i]);
          right.from = intersection.to;
          freeTimes[i].to = intersection.from;
          if( right.from < right.to ) {
            freeTimes.splice(++i,0, right);  // Skip this we have already processed it.
          }
        }
      }
    }
  }

  , getFreeTimes( tRange, events, dimensions) {
    var freeTimes = [tRange];
    for(var eIdx = 0; eIdx < events.length; eIdx++) {
      var e = events[eIdx];
      timeUtils.exludeIntersection(freeTimes, e);
    if(freeTimes.length === 0) break;
    }
    // { result : freeTimes.length > 0, freeTimes : freeTimes}
    return freeTimes;
  }

  // PB : TODO -- Timeutils Test cases. Comment in production.
  , testAll(){

    // // Disjoint
    // var expected = false
    // var actual = null;

    expected = 2**4 + 2**(6+21) + 2**(5+31+6);
    actual = this.toRecurringPattern(
          { from : new Date('5/21/2020, 11:45:00 PM'), to : new Date('5/22/2020, 00:15:00 AM') } ).recurring;
    if(expected !== actual ) throw (' TEST FAILED toRecurringPattern : expected = ' + expected + ' actual = ' + actual)
    
    // actual = this.__hasEventIntersection(
    //                   { from : new Date('5/21/2020, 11:45:00 PM'), to : new Date('5/22/2020, 00:15:00 AM') }
    //                 , { from : new Date('5/22/2020, 11:45:00 PM'), to : new Date('5/23/2020, 00:15:00 AM') }) 
    // if(expected !== actual ) throw (' TEST FAILED Disjoint : expected = ' + expected + ' actual = ' + actual)

    // // Interleaved
    // expected = JSON.stringify({ from : new Date('5/22/2020, 00:00:00 AM'), to : new Date('5/22/2020, 00:15:00 AM') })
    // actual = this.__hasEventIntersection(
    //   { from : new Date('5/21/2020, 11:45:00 PM'), to : new Date('5/22/2020, 00:15:00 AM') }
    // , { from : new Date('5/22/2020, 00:00:00 AM'), to : new Date('5/22/2020, 00:30:00 AM') }) 
    // if(expected !== JSON.stringify(actual) ) throw (' TEST FAILED Interleaved : expected = ' + expected + ' actual = ' + JSON.stringify(actual))

    // // Subset
    // expected = JSON.stringify({ from : new Date('5/22/2020, 00:00:00 AM'), to : new Date('5/22/2020, 00:10:00 AM') })
    // actual = this.__hasEventIntersection(
    //   { from : new Date('5/21/2020, 11:45:00 PM'), to : new Date('5/22/2020, 00:15:00 AM') }
    // , { from : new Date('5/22/2020, 00:00:00 AM'), to : new Date('5/22/2020, 00:10:00 AM') }) 
    // if(expected !== JSON.stringify(actual) ) throw (' TEST FAILED Interleaved : expected = ' + expected + ' actual = ' + JSON.stringify(actual))

    // Null

    // Boundary Test Cases....

  var r1 = {
    end: new Date("1970-01-01T11:00:00.000Z")
    , every: null
    , from: new Date("2020-06-04T06:30:00.000Z")
    , id: "DC664060-A0A8-11EA-8B3D-7771F3D49CC1"
    , migrationstate: 1
    , practitionerId: "5FDF1790-8288-11E9-9044-91D8D8658887"
    , purpose: "Meeting"
    , recurring: 106
    , start: new Date("1970-01-01T06:30:00.000Z")
    , status: "SCHEDULED"
    , to: null
  };
  var e1 = {
    availability: false
    , end: null
    , every: null
    , for: null
    , from: new Date("2020-06-08T11:00:00.000Z")
    , id: "AEC5A7E1-A96D-11EA-8DE7-19E354C126F4"
    , migrationstate: 8
    , patientId: "271F4970-F173-4530-A894-68F520BF7945"
    , patientmob: "9944715969"
    , patientname: "SAMUEL RAJA DURAI J"
    , practitionerId: "5FDF1790-8288-11E9-9044-91D8D8658887"
    , purpose: "Appointment"
    , start: null
    , status: "SCHEDULED"
    , to: new Date("2020-06-08T11:15:00.000Z")
  };

    this.hasEventIntersection(e1, r1);
    debugger
    // Iterators
    var eventIterator = this.getEventGenerator({ recurring : 2**1 }); // All Mondays from today.
    for(var i=0, e; i<10 && !(e=eventIterator.next()).done; i++) {
      console.dir(e);
    }

  } 
};

function promisify(ctx, asyncoperation, arraylikearguments) {
  var originalcallback = arraylikearguments.splice(arraylikearguments.length-1, 1)[0];
  return new Promise(function(resolve, reject) {
    asyncoperation.call(ctx, ...arraylikearguments, function(err, result) {
      if (err) return reject(arguments);
      resolve(arguments);
    });
  }).then((aArr)=>{
    originalcallback(...aArr);
    return aArr[1]
  }).catch(function(aArr){
    originalcallback(...aArr);
    throw aArr[0];
  });
}



var Tasq$1 = (function(){

  var __proto__ = { 
  };

  var listeners = [];

  function Tasq(first, ...rest){
    first.info = utils.assign({ args : rest }, __proto__); 
    return first
  }
  Tasq.create = Tasq;
  Tasq.addlistener = (l)=>{ listeners.push(l); };
  Tasq.catch = (e)=>{ console.error(e); console.error(e.messages.join(' ')); listeners.forEach(l => { l(e); } );}; 
  Tasq.then = (d)=>{ listeners.forEach(l => { l(null, d); } ); return d}; 
  return Tasq
})();



var Traq$1 = (function(){
  var __proto__ = {};

  var log = {
      SUCCESS : []
    , FAILURE : []
    , SKIPPED : []
  };

  Traq$1 = function(){ return utils.assign({}, __proto__) };
  Traq$1.create = Traq$1;
  Traq$1.statuslog = statuslog;
  function statuslog(err, data){
    if(err) log.FAILURE.push( {err, data} );
    else log.SUCCESS.push(data);
  } 
  Traq$1.notify = (event)=>{
    if(event.error) log.FAILURE.push( event );
    else log.SUCCESS.push(event);
  };
  Traq$1.finally = ()=>{
    console.log('Total : ' + (log.SKIPPED.length + log.SUCCESS.length + log.FAILURE.length));
    console.log('Pass  : ' + log.SUCCESS.length );
    console.log('Fail  : ' + log.FAILURE.length);
    console.log('Skipped  : ' + log.SKIPPED.length);

    console.log('FAILURES');
    console.log([JSON.stringify(log.FAILURE)]);
  };
  return Traq$1
})();


var tzoffset = 0;
var utils = {
  commonmasks  : m_common,
  p_round: p_round,
  g_round: g_round,
  escapeRegExp(string) {
    return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
  }

  , getTZOffsetMilliseconds : (()=>{
    var d = new Date();
    var t1 = d.toISOString().replace('Z','');
    var t2 = d.toISOString();
    tzoffset = ( new Date(t2) - (new Date(t1))); // /60/60/1000 -- milliseconds.
    return ()=>{ return tzoffset}
  })()
  
  , getLocalDateYYYYMMDD(date){
    var d = new Date();
    d.setTime(tzoffset + new Date(date).getTime());
    return d.toISOString().slice(0,10).replace(/-/g,"")
  }
  
  , assign(target /** , ...sources */) {
    return utils.assign_core(false, ...arguments)     
  }

  , assign_strict(target /** , ...sources */) {
    return utils.assign_core(true, ...arguments)     
  }

  // assign
  , assign_core(keycase, target /** , ...sources */) {
    // Important use this instead of Object.assign. 
      // Object.assign has several limitations. 
      // 1) It doesn't skip intermediates if the final overriden value is already determined. 
            // This implementation address this. 
      // 2) It is shallow and doesn't clone object references and therefore risks side effects to original nested objects.
            // This implementation deep clones objects arrays and other types with some limitations.
      // 3) Does not merge but allways overrides.
            // Merges objects and arrays. Overides primitives.
            // Array merge is by default a concatenation. 
              // PB : TODO -- If corresponding array indices have objects they can be merged like lodash.
      // 4) Does not retain non writable and configurable attributes.
            // This implementation copies descirptors so clones retain non writability and configurability identical to the source. 
      // 5) Recursion can cause infinite recursion. Object.assign doesn't deal with this.
            // Detects and avides ininite recursion.

    var cpi = {}; // Caseless property index of already processed target keys. Since we do not alter the target key we need a lookup that gives the actual key.
    var getNormalizedKey = keycase ? 
        keycase === 'lower' ? (key)=> key.toLowerCase() : (key)=>key 
      : (key)=> key.toLowerCase(); // returns a normalized equivalent key.

    // We do a right to left iterations!
    // overrideKeys = true; 

    // PB : Note -- IMPORTANT alreadyScanned has side effects..
    var alreadyScanned = (key)=>{

      Object.keys(target).forEach(k => { 
        cpi[k.toLowerCase()] = k; 
      
        if(cpi[k.toLowerCase()] !== k){
          Object.defineProperty( target, cpi[k.toLowerCase()], Object.getOwnPropertyDescriptor(target, k) ); // Relocate to new overridden key
          delete target[tkeys[tkidx]]; // PB : TODO -- review that accessors are not called during delete !
        }
      });
      alreadyScanned = ()=>{ return true; }; // Dont do anything next time we are called.
      // Its not necessary that we found it.
      cpi[key.toLowerCase()] ? null : cpi[key.toLowerCase()] = key;
      return false;
    };

    // PB : Note -- IMPORTANT findEqualKey has side effects..
    var findEqualKey = (key) => {
      // If equiv key on the target is what the target key should ultimately be we will cache all possible now. 
      // However in the overrideKeys case this is not true in which case we postpone until the first one found in the overrider.
      {
        
        if(alreadyScanned(key)) {  cpi[key.toLowerCase()] ? null : cpi[key.toLowerCase()] = key; }      }
      var targetKey = cpi[key.toLowerCase()];
      return { targetKey, propertyDescriptor : Object.getOwnPropertyDescriptor(target, targetKey) }
    };

    var hOP = Object.prototype.hasOwnProperty;
  
    var __assign = function(keycase, target /** , ...sources */) {

      if(utils.js.isUndefined(target)) return; // There is noting to assign to. We just play dumb. Why did the caller even call us ?

      // PB : TODO -- we need a flag to support undefined overrides. Default behavior is to retain as much as possible.
      // if(utils.js.isUndefined(arguments[arguments.length-1])) return undefined;
      var undef = 0;
      for(; undef < arguments.length-1 && utils.js.isUndefined(arguments[arguments.length-undef-1]); undef++); // Skip all undefined overrides.
      if(undef === arguments.length-1) return target;

      if(utils.js.isPrimitive(arguments[arguments.length-1-undef])) return arguments[arguments.length-1-undef];
      else {
        // PB : TODO -- Primitive targets cannot be preserved.
        // Target should be decided on first non primitive discovery.
        // Arrays don't work properly yet...
        // We start with a temporary object and if there is a primitive override it will override this temporary object altogether. 
        // PB : TODO -- We could convert primitives to their respective object counterparts... Howeer strings with indexes and arrays will get messy.
        if(utils.js.isPrimitive(target)) {
          target = {};
        }      }
      
      for(var
          finalized = {} // One instance for each structurally corresponding key that has already been overridden. Order need not be guaranteed.
        , overrideOrMerge = function (originalkey) {
          // Decision merge or override default to the following.
            // Primitives are overridden by non Primitives ( arrays or objects )
            // Non Primitives are overridden by Primitives. There is no concept of assigning Primitives as new named attributes of Objects.
            // Objects assigned to Objects will be merged.
            // Arrays assigned to Arrays will be merged i.e concatenated. PB : TOOD -- Order will be ??? target then right to left for sources.

          // PB : TODO -- We should avoid examining or tampering with the value during clone and should find another way to make this decision. 
                  // We do not want side effects to occur while examining the value. Accessors and proxies can do this.
                  // Currently assuming simple use cases at this point...
            // Ideally Accessor Descriptors should be postponed for evaluation when runtime access to value is required.

          var { targetKey, dL } = findEqualKey(originalkey);
          var dR = Object.getOwnPropertyDescriptor(this, originalkey);

          if(!dL) {
            // target did not have what it should be according to what was specifed. Lets check for other possibilities.
            dL = Object.getOwnPropertyDescriptor(target, originalkey);
            if(!dL) { Object.defineProperty( target, targetKey, dR ); finalized[targetKey] = true; return; }
          }

          if(!utils.js.isUndefined( dR.writable )) { // writable attribute is present only in Data Descriptor Case
            var valR = this[originalkey]; // We can examine data descriptors without any side effects. ( PB : TODO -- Proxies ! are expected to be transparent !! )
            if(utils.js.isPrimitive( valR )) {
              finalized[targetKey] = true; 

              // Primitive values also are implicitly cloned by Data Descriptors when defineProperty is called.
              // Advantage is writable / configurable permissions are retained instead of simple assignment.
              Object.defineProperty( target, targetKey, dR );
              return
            }
            // If its not primitive it may need to get merged if the Left value is also non primitive and of a compatible type...
          }

          // PB : TODO -- Data descriptor that is not writable needs to be handled !? proper check to handle value etc required.
          if(utils.js.isUndefined( dR.writable )  || utils.js.isUndefined( dL.writable ) ){ 
            // One or both of them is an accessor descriptor.
            // If either one of them is an accessor we need to postpone the merge to runtime evaluation on access.
            
            var dChosen = !utils.js.isUndefined( dL.writable ) ? dR : dL; // Figure out which one is the accessor.
            
            // Accessor Descriptors cannot be examined due to possible side effects and possible differences 
            //  in the value and its type at the point of execution. 
            //  Since the accessed value here is meaningless we don't know what type it will eventually be at the point wehre 
                // real program code needs the value !!!
            // There are 2 options 
              // 1) we could do a decoupling here (at clone time) and capture the value.
              // 2) or we could postpone until run time evaluation.
            // Since in either case We need to examine the value it may be superior to evaluate at runtime and decide then. 
            // Although decoupling is important and better done as early as possible the delayed value is more important. 
              // PB : TODO -- We should provide a pref to evaluate and decouple at clone time
              // PB : TODO -- The postponing strategy has one more issue where delayed override can clobber target modifications on the left side.
                // -- Causing unexpected values specifically when the delayed override value from the source is expected.
                // Ideally the value that was set intermediately should supercede.
                // -- The preferred behaviour implemented here is to decouple on first set such that the intermediate value set on the clone supercedes.
            // Original getter needs to access value in original context.
            // Setters need to be redirected to "cloned setter" in current context.
            var ctx = this;
            var dRGetter = !utils.js.isUndefined( dR.writable ) ? function(){ return dR.value} : dR.get;
            var dLGetter = !utils.js.isUndefined( dL.writable ) ? function(){ return dL.value} : dL.get;
            var valForSetter = null;
            dR.configurable;

            if(!utils.js.isUndefined( dL.writable )) {
              // Oridinarily since we postpone we need to refrence and reevaluete valL also at access time coz the target val could have been switched. 
              // The target is now an accessor which gets decoupled on first set in that case there is no need to re-evaluate.
              // These getters are still valid until such a first set happens until which time the valL remains 
              // It is therefore possible to cache the valL and use it instead of target[key] at access time....
              var valL = target[targetKey];
              if(utils.js.isPrimitive(valL)) {  dChosen.get = function(){  return dRGetter.call(ctx)  }; }
              else { dChosen.get = function(){  
                  // In this case decoupling could happen on first access instead of first set.
                  return utils.assign_core(keycase, valL, dRGetter.call(ctx)) 
                }; 
              } 
            }
            else {
              // rVal could be an accessor or a nonPrimitive. Either case it needs to be mreged in.
              dChosen.get = function(){ return utils.assign_core(keycase, dLGetter.call(target), dRGetter.call(ctx))  };
            }

            // __setter ! Although this is running in the current context we cant use the dR.set setter like so dL.set = dR.set 
              // this is dangerous as we do not know what else the setter does !!!. We don't konw what the getter does either 
              // but we need to do a one time read in any case wheter at clone time or at access time.  
            dChosen.set = function(val) { 
              // First time set on clone decouples
              dChosen.get = function() { return valForSetter};
              dChosen.set = function(val) { return valForSetter = val };
              dChosen.configurable = true;
              Object.defineProperty( target, targetKey, dChosen );  
              return valForSetter = val 
            };
            dChosen.configurable = true;
            Object.defineProperty( target, targetKey, dChosen );
            finalized[targetKey] = true;
            return
          }

          // Neither is an accessor. valR is nonPrimitive, dL is not an Accessor
          // Target is also a Data Descriptor. We can examine it as well to take a decision.
          var valL = target[targetKey]; // We can examine data descriptors without any side effects. ( Proxies ! are expected to be transparent !! )
          if(utils.js.isPrimitive( valL )) {
              if(!utils.js.isNull( valR ) && !utils.js.isUndefined( valR )) {
                finalized[targetKey] = true;
                Object.defineProperty( target, targetKey, dR );
              }
              return 
            }
          else {
            // Neither is Primitive.
            // console.log('Assign Iter...')
            if(valL === valR) { finalized[targetKey] = true; return true;}
            if(utils.js.isObject( valL ) && utils.js.isObject( valR )) { utils.assign_core(keycase, valL, valR ); finalized[targetKey] = true; return;}
            if(utils.js.isArray( valL ) && utils.js.isArray( valR )) { target[targetKey] = valL.concat(valR); finalized[targetKey] = true; return;}
            if(utils.js.isNull( valL ) || utils.js.isNull( valR )) { target[targetKey] = valR; finalized[targetKey] = true; return;}
            if(utils.js.isUndefined( valL ) && utils.js.isUndefined( valR )) { target[targetKey] = valR; finalized[targetKey] = true; return;}

            // Functions are tricky. Closures and bound functinos will continue to refer to source locations and could cause unpredictable behaviour.
            // However if such bound functions are being used the intention must be retention of such linkage.
            // Current behavior is to just override. PB : TODO -- Consider options to have multifunction event handlers... if needed.
            if(utils.js.isFunction( valR )) { target[targetKey] = valR; finalized[targetKey] = true; return;}
            else if (utils.js.isFunction( valL )) { return target[targetKey] = valL; } // target may not be valL scope.

            // Unsupported assign / merge for property datemodified data types Thu Sep 10 2020 15:59:38 GMT+0530 (India Standard Time) 
            // , Thu Sep 10 2020 15:54:22 GMT+0530 (India Standard Time)
            //  SAM : TODO dates are not getting merged.
            if(utils.js.isDate( valL ) && utils.js.isDate( valR )) { target[targetKey] = valR; return;}
            
            var msg = `Unsupported assign / merge for property ${targetKey} data types ` + valL + ' , ' + valR;
            console.error(msg);
            throw msg;
          }
        }
        , appendmissing = function (originalkey) {
          var standardizedKey = getNormalizedKey(originalkey);
          if (!hOP.call(finalized, standardizedKey)) overrideOrMerge.call(this, originalkey); 
        }
        // Start from the rightmost and override or merge.
        , _junkvar = Object.keys(arguments[arguments.length-1-undef]).forEach(overrideOrMerge, arguments[arguments.length-1-undef])
        , i = arguments.length-1-undef;
        2 < i--; 
        utils.js.isUndefined(arguments[i]) ? null :
          // Intermediate primitives are useless. Skipped coz the target has already been assigned.
          utils.js.isPrimitive(arguments[i]) ? null 
        : Object.keys(arguments[i]).forEach(appendmissing, arguments[i])
      ){}


      return target;
    };

    return __assign(...arguments)
  }


  // PB : TODO -- Proper type checking.
  // , __TPL__typeHandlers : {
  //     '[object String]' : defaultFn
  //   , '[object Array]' : defaultFn
  //   , '[object Object]' : defaultFn
  //   , '[object Null]' : defaultFn
  //   , '[object Undefined]' : defaultFn
  //   , '[object Date]' : defaultFn
  //   , '[object RegExp]' : defaultFn
  //   , '[object Function]' : defaultFn
  // }

  // PB : TODO -- Proper type checking.
  // Javascript language utilities that should have been really in the language itself.
  , js : {

    typeInstances : [
        ""
      , 0
      , true
      , null
      , // undefined
      , []
      , {}
      , Symbol() 
      , new Date()
      , /.*/
      , Promise.resolve(true)
      , function() {}
      , BigInt(0)
    ]
    , proxyable : []
    , nonproxyable : []

    , isString(x) {
      return Object.prototype.toString.call(x) === "[object String]"
    }
    , isNumber(x) {
      return Object.prototype.toString.call(x) === '[object Number]'
    }
    , isBoolean(x) {
      return Object.prototype.toString.call(x) === '[object Boolean]'
    }
    , isNull(x) {
      return Object.prototype.toString.call(x) === '[object Null]'
    }
    , isUndefined(x) {
      return Object.prototype.toString.call(x) === '[object Undefined]'
    }
    , isArray(x) {
      return Object.prototype.toString.call(x) === '[object Array]'
    }
    , isObject(x) {
      return Object.prototype.toString.call(x) === '[object Object]'
    }
    , isSymbol(x) {
      return Object.prototype.toString.call(x) === '[object Symbol]'
    }
    , isDate(x) {
      return Object.prototype.toString.call(x) === '[object Date]'
    }
    , isRegExp(x) {
      return Object.prototype.toString.call(x) === '[object RegExp]'
    }
    , isPromise(x) {
      return Promise.resolve(x) === x
    }
    , isPromiseOrFunction(o) {
      if(utils.js.isPromise( o ) || utils.js.isFunction(o)) return true;
      return false;
    }
    , isFunction(x) {
      return Object.prototype.toString.call(x) === '[object Function]'
    }
    , isBigInt(x) {
      return Object.prototype.toString.call(x) === '[object BigInt]'
    }
    
    , isDataDescriptor(d) { return (utils.js.isUndefined(d.set) && utils.js.isUndefined(d.get)) ? d : false }

    // Grouping JS Types into 4 Groups
    // Primitives
      // -- boolean, String, Number
    // Arrays
    // Objects
    // Special
      // -- date, regexp, function ... and other unkown types
    , typeGroups() {
      return [
          '[Primitive]'
        , '[Null]'
        , '[Undefined]'
        , '[Symbol]'
        , '[Array]'
        , '[Object]'
        , '[Special]'
      ]
    }

    , typeGroup(x) {
      var tgMap = {
          '[object String]' : '[Primitive]'
        , '[object Number]' : '[Primitive]'
        , '[object Boolean]' : '[Primitive]'
        , '[object Null]' : '[Null]'
        , '[object Undefined]' : '[Undefined]'
        , '[object Symbol]' : '[Symbol]'
        , '[object BigInt]' : '[BigInt]'

        , '[object Array]' : '[Array]'
        , '[object Object]' : '[Object]'
        , '[object Date]' : '[Special]'
        , '[object RegExp]' : '[Special]'
        , '[object Function]' : '[Special]'
        , '[object Promise]' : '[Special]'
      };
      return tgMap[Object.prototype.toString.call(x)]
    }

    , getTypeInfo(x) {

      var typeMap = {
          '[object String]' : //__assign(typeInfo, 
            { typeGroup : '[Primitive]', isString : true, isPrimitive : true
              , create : ()=>{return ""} }
          //)
        , '[object Number]' :  { typeGroup : '[Primitive]', isNumber : true, isNumeric : true, isPrimitive : true 
              , create : ()=>{return 1}}
        , '[object Boolean]' :  { typeGroup : '[Primitive]', isBoolean : true, isPrimitive : true 
              , create : ()=>{return true}}
        , '[object Null]' :  { typeGroup : '[Null]', isNull : true 
              , create : ()=>{return null}}
        , '[object Undefined]' :  { typeGroup : '[Undefined]', isUndefined : true 
              , create : ()=>{return }}
        , '[object Symbol]' :  { typeGroup : '[Symbol]', isSymbol : true 
              , create : ()=>{return new Symbol()}}
        , '[object BigInt]' :  { typeGroup : '[BigInt]', isNumeric : true, isPrimitive : true 
              , create : ()=>{return new BigInt()}}

        , '[object Array]' :  { typeGroup : '[Array]', isArray : true 
              , create : ()=>{return []}}
        , '[object Object]' :  { typeGroup : '[Object]', isObject : true 
              , create : ()=>{return {}}}
        , '[object Date]' :  { typeGroup : '[Special]', isDate : true 
              , create : ()=>{return new Date}}
        , '[object RegExp]' :  { typeGroup : '[Special]', isRegExp : true 
              , create : ()=>{return new RegExp}}
        , '[object Function]' :  { typeGroup : '[Special]', isFunction : true 
              , create : ()=>{return new Function}}
        , '[object Promise]' :  { typeGroup : '[Special]', isPromise : true 
              , create : ()=>{ throw "Blank promise cannot be created."}}
      };
      return typeMap[Object.prototype.toString.call(x)]
    }

    , isPrimitive(x) {
      var xType = this.nativeType(x);
      return xType === '[object Boolean]' || xType === '[object String]' || xType === '[object Number]' || xType === '[object Symbol]' ||
        xType === '[object BigInt]'
    }

    , isSpecial(x) {
      return !isArray(x) && !isObject(x) && !isPrimitive(x) 
    }

    , nativeTypes() {
      return [
        // Primitives
          '[object String]'
        , '[object Number]'
        , '[object Boolean]'  
        , '[object Null]'
        , '[object Undefined]'
        , '[object Symbol]'
        , '[object BigInt]'

        // Non Primitives. 
        , '[object Array]'
        , '[object Object]'
        , '[object Date]'
        , '[object RegExp]'
        , '[object Function]'
        , '[object Promise]'
      ]
    }

    , nativeType(x) { return Object.prototype.toString.call(x) } 
    
  }

    // Upsert for a hash ??
    , hashupsert : function(oA, oB){
      Object.keys(oA).forEach(( oAKey )=>{
        if(oB[oAKey]) {
          var distinct = new Set(oA[oAKey]);
          oB[oAKey].forEach((each)=>{
            distinct.add(each);
          });
          oA[oAKey] = Array.from(distinct);
        }
      });
    }

  // Upsert for an array.
  // Also the same as pushdistinct. Target is expected to have only one instance.
  , upsert(arr, val) {
    // 0 -- did nothing
    // 2 -- inserted 
    // 3 -- updated 
    // PB: TODO -- We can use (new Set(arr)).add ???. But is this more expensive ?
    var found = arr.find((element)=>{ return element === val}); 
    return found ? utils.js.isObject(val) && utils.js.isObject(val) ? (Object.assign( found, val), 3) : 0
      : (arr.push(val), 2) ;
  }

  // accumulate 
  //  o[toVectorPropName] which is an array
  //  and o[propName] which is a string
  // into vectorTarget which is an array
    //  already previously accumulated in a similar manner probably already attached as oTarget[toVectorPropName]

  // 0 or undefined or null -- didnt do anything.  ( val doesn't exist ) 
  // 1 -- created target and inserted val
  // 2 -- didn't create target but inserted val
  // 3 -- didn't create target but updated val and also handled o[propName].
  , accumulate : function(val, o, propName, toVectorPropName, vectorTargetCreator,
      identityEvaluator
    ){
      var created = 0;

      if(utils.js.isUndefined(val)) return; // Nothing to do i.e. nothing was provided to accumulate. We don't accumulate undefined.
      if(val === o[propName]) return; // Nothing to do. 

      var vectorTargetContainer = o[toVectorPropName] || (o[toVectorPropName] = {});
      if(!vectorTargetCreator) vectorTargetCreator = { create : (val)=>{ 
        return val ? vectorTargetContainer[o["id"]] = [val] : [] } }; 
      
      var vectorTarget = vectorTargetContainer[o["id"]];
 
      if(!vectorTarget) {
        created = 1;
        vectorTarget = vectorTargetContainer[o["id"]] = vectorTargetCreator.create(o[propName]);
      }

      if(!identityEvaluator) identityEvaluator = (a, b)=>{ return a === b };

      var upsertResult = 0;
      if(!created && !utils.js.isUndefined(o[propName])) {
        if(!vectorTargetContainer[o["id"]].find((element)=>{ return identityEvaluator(element, o[propName]) })) {
          upsertResult = utils.upsert(vectorTarget, o[propName]);
        }
      }
      upsertResult = utils.upsert(vectorTarget, val);
      return created ? created : upsertResult;
  }

  // async Utils
  , async : {
    all(list, task){ 
      var queueditems=[];
      list.forEach(function(v, i, a)  {
        queueditems.push(task(v, i, a));
      });       
      return Promise.all(queueditems)
    }
  }


// PB : TODO -- Remove these.
  // , fsdb : require('./fsdb/fsdb')
  // , xlsx : require('./fsdb/xlsx')
  // , xlsxvalidator : require('./fsdb/xlsxvalidator')

  , timeUtils
  , dx: dx_1
  , cliargs: cliargs$1
  , any: any$1
  , promisify
  , moment
  , Tasq: Tasq$1
  , Traq: Traq$1
  , validationhelpers : validationhelpers
};

var utils_1 = utils;

var naiveFallback = function () {
	if (typeof self === "object" && self) return self;
	if (typeof window === "object" && window) return window;
	throw new Error("Unable to resolve global `this`");
};


// https://mathiasbynens.be/notes/globalthis
var globalThis_1 = (function () {
	if (this) return this;

	// Unexpected strict mode (may happen if e.g. bundled into ESM module)

	// Fallback to standard globalThis if available
	if (typeof globalThis === "object" && globalThis) return globalThis;

	// Thanks @mathiasbynens -> https://mathiasbynens.be/notes/globalthis
	// In all ES5+ engines global object inherits from Object.prototype
	// (if you approached one that doesn't please report)
	try {

    Object.prototype.__defineGetter__('__global__', function() {
      return this;
    });
    __global__.globalThis = __global__; // lolwat

	} catch (error) {
		// Unfortunate case of updates to Object.prototype being restricted
		// via preventExtensions, seal or freeze
		return naiveFallback();
	}
	try {
		// Safari case (window.__global__ works, but __global__ does not)
		if (!__global__) return naiveFallback();
		return __global__;
	} finally {
		delete Object.prototype.__global__;
	}
})();

// A selector based channels implementation as compared to a simple array.
var channelMixin = (function() {

  // get channels that qualify for a selector.
  function getSubscriptions(selector) {
    console.dir(this.__channels);
    var filtered = this.__channels; // start with the world...
    // Selector is a simple list of tags. 
    for(var select in selector) { 
      if(!filtered[selector[select]]) {
        // If the assumption is that all indexes are properly built it implies this channel doesn't exist.
        return []; // We are looking for all selectors therefore if even one fails we don't have anything.
      }
      filtered = filtered[selector[select]]; 
    }

    return filtered['__data']; // Flattened array
  }

  function addSubscription(selector, func, context) {

    var unfulfilled = selector.splice(0);
    var filtered = this.__channels; // start with the world...
    console.log(filtered);
    for(var select in unfulfilled) { 
      if(!filtered[unfulfilled[select]]) {
        filtered[unfulfilled[select]] = { __data : [] };
      }
      filtered = filtered[unfulfilled[select]];
      unfulfilled = unfulfilled.splice(0,1);
    }

    // PB : TODO -- All accessor paths need to be indexed ! 
    // Will currently fail if not published and queried in the same order.
    filtered.__data.push({context: context, callback: func});    
  }

  return function(){ 
    this.__channels = {};
    this.getSubscriptions = getSubscriptions; 
    this.addSubscription = addSubscription;
    return this;
  }
})();

// Mediator pattern.
var mediator = (function() {
  
    var __subscribe = function(selector, func, context) {
      var subscriptions = this.channels.getSubscriptions(selector);
      
      if(subscriptions.length < 1){ 
        this.channels.addSubscription(selector, func, context);
      }

      return this;
    };
  
    var __publish = function(selector) {
      console.log('publishing for selector ' + selector);
      var subscriptions = this.channels.getSubscriptions(selector);
      console.log(subscriptions);
      if(subscriptions.length < 1){ return; }
      var args = Array.prototype.slice.call(arguments, 1);
      for(i=0; i < subscriptions.length; i++) {
        subscription = subscriptions[i];
        subscription.callback.apply(subscription.context, args);
      }
      return this;
    };
  
    return function mediator() {
      var thisObj = this ? this : {};
      Object.defineProperty(thisObj, 'channels', { value : channelMixin.apply({}), writable: false, enumerable : false});
      thisObj.publish = __publish;
      thisObj.subscribe = __subscribe;
      return thisObj;
    };
})();

// Unique ID creation requires a high quality random # generator.  In node.js
// this is pretty straight-forward - we use the crypto API.



var rng = function nodeRNG() {
  return crypto__default['default'].randomBytes(16);
};

/**
 * Convert array of 16 byte values to UUID string format of the form:
 * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
 */
var byteToHex = [];
for (var i$2 = 0; i$2 < 256; ++i$2) {
  byteToHex[i$2] = (i$2 + 0x100).toString(16).substr(1);
}

function bytesToUuid(buf, offset) {
  var i = offset || 0;
  var bth = byteToHex;
  return bth[buf[i++]] + bth[buf[i++]] +
          bth[buf[i++]] + bth[buf[i++]] + '-' +
          bth[buf[i++]] + bth[buf[i++]] + '-' +
          bth[buf[i++]] + bth[buf[i++]] + '-' +
          bth[buf[i++]] + bth[buf[i++]] + '-' +
          bth[buf[i++]] + bth[buf[i++]] +
          bth[buf[i++]] + bth[buf[i++]] +
          bth[buf[i++]] + bth[buf[i++]];
}

var bytesToUuid_1 = bytesToUuid;

// **`v1()` - Generate time-based UUID**
//
// Inspired by https://github.com/LiosK/UUID.js
// and http://docs.python.org/library/uuid.html

var _nodeId;
var _clockseq;

// Previous uuid creation time
var _lastMSecs = 0;
var _lastNSecs = 0;

// See https://github.com/broofa/node-uuid for API details
function v1(options, buf, offset) {
  var i = buf && offset || 0;
  var b = buf || [];

  options = options || {};
  var node = options.node || _nodeId;
  var clockseq = options.clockseq !== undefined ? options.clockseq : _clockseq;

  // node and clockseq need to be initialized to random values if they're not
  // specified.  We do this lazily to minimize issues related to insufficient
  // system entropy.  See #189
  if (node == null || clockseq == null) {
    var seedBytes = rng();
    if (node == null) {
      // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
      node = _nodeId = [
        seedBytes[0] | 0x01,
        seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]
      ];
    }
    if (clockseq == null) {
      // Per 4.2.2, randomize (14 bit) clockseq
      clockseq = _clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
    }
  }

  // UUID timestamps are 100 nano-second units since the Gregorian epoch,
  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so
  // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
  var msecs = options.msecs !== undefined ? options.msecs : new Date().getTime();

  // Per 4.2.1.2, use count of uuid's generated during the current clock
  // cycle to simulate higher resolution clock
  var nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;

  // Time since last uuid creation (in msecs)
  var dt = (msecs - _lastMSecs) + (nsecs - _lastNSecs)/10000;

  // Per 4.2.1.2, Bump clockseq on clock regression
  if (dt < 0 && options.clockseq === undefined) {
    clockseq = clockseq + 1 & 0x3fff;
  }

  // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
  // time interval
  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
    nsecs = 0;
  }

  // Per 4.2.1.2 Throw error if too many uuids are requested
  if (nsecs >= 10000) {
    throw new Error('uuid.v1(): Can\'t create more than 10M uuids/sec');
  }

  _lastMSecs = msecs;
  _lastNSecs = nsecs;
  _clockseq = clockseq;

  // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
  msecs += 12219292800000;

  // `time_low`
  var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
  b[i++] = tl >>> 24 & 0xff;
  b[i++] = tl >>> 16 & 0xff;
  b[i++] = tl >>> 8 & 0xff;
  b[i++] = tl & 0xff;

  // `time_mid`
  var tmh = (msecs / 0x100000000 * 10000) & 0xfffffff;
  b[i++] = tmh >>> 8 & 0xff;
  b[i++] = tmh & 0xff;

  // `time_high_and_version`
  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
  b[i++] = tmh >>> 16 & 0xff;

  // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
  b[i++] = clockseq >>> 8 | 0x80;

  // `clock_seq_low`
  b[i++] = clockseq & 0xff;

  // `node`
  for (var n = 0; n < 6; ++n) {
    b[i + n] = node[n];
  }

  return buf ? buf : bytesToUuid_1(b);
}

var v1_1 = v1;

function v4(options, buf, offset) {
  var i = buf && offset || 0;

  if (typeof(options) == 'string') {
    buf = options === 'binary' ? new Array(16) : null;
    options = null;
  }
  options = options || {};

  var rnds = options.random || (options.rng || rng)();

  // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
  rnds[6] = (rnds[6] & 0x0f) | 0x40;
  rnds[8] = (rnds[8] & 0x3f) | 0x80;

  // Copy bytes to buffer, if provided
  if (buf) {
    for (var ii = 0; ii < 16; ++ii) {
      buf[i + ii] = rnds[ii];
    }
  }

  return buf || bytesToUuid_1(rnds);
}

var v4_1 = v4;

var uuid = v4_1;
uuid.v1 = v1_1;
uuid.v4 = v4_1;

var uuid_1 = uuid;

// var __g = __G.__g;
globalThis_1.mediator = mediator.apply({});
// __g.mediator = __g.mediator.apply({}) 
console.dir(globalThis_1.mediator);


const indexHelper = (function(){

  var getPermutations = function(array){
    var permutations = {};
    // l(array.splice(0, 1))
    for(var i in array) {
      // l(array[i]);
      var aclone = array.slice(0);
      aclone.splice(i, 1);
      permutations[array[i]] = getPermutations(aclone );
    }
    return permutations
  };

  var getCombinations = function(array){
    // P & C
    // http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-65002001000200009
    var set = [];
    var alen = array.length;
    var combinations = 1 << alen; // Math.pow(2, array.length);
    
    for (var i = 1; i < combinations ; i++){
      var combination= [];
      for (var j=0;j<alen;j++) {
        if ((i & (1 << j))){ 
          combination.push(array[j]);
        }
      }
      set.push(combination);
    }

    return set;
  };

  return function(obj) {
    obj.getPermutations = getPermutations;
    // obj.getPermutations = getPermutations_HeapsMethod;
    obj.getCombinations = getCombinations;

    return obj;
  };
})();

const AnyStore = (function(){
  // A store that can store any type and lookup any type.
  // Weakmaps cannot have primitives as keys and hashs cannot have objects as keys. 
  // This wraps hash and a weakmap into an abstract class that routes to the appropriate 
  // store based on the type of the object.

  const getForPrimitive = function(primitive, target) { return target.storeForPrmitives[primitive] };
  const getForObject = function(obj, target) { return target.storeForObjects.get(obj) };
  const getForSymbol = function(symbol, target) { return target.storeForObjects.get(target.__symbolToObj[symbol]) };
  
  const setForPrimitive = function(primitive, content, target) { 
    // PB : -- Note  : Importatn -- No difference between 100 and "100" due to JS keys all being strings...
    target.storeForPrmitives[primitive] = content;
    return content;
  };

  const setForObject = function(obj, content, target) {
    // PB : TODO -- need to listen to changes in content and its attributes to re-index it.
    target.storeForObjects.set(obj, content); 
    return content;
  };
  const setForSymbol = function(symbol, content, target) {
    // PB : TODO -- need to listen to changes in content and its attributes to re-index it.
    target.storeForObjects.set(target.__symbolToObj[symbol], content); 
    return content;
  };

  const getFor =  {
      '[object String]' : getForPrimitive 
    , '[object Object]' : getForObject
    , '[object Symbol]' : getForSymbol
  };
  getFor['[object Number]'] = getFor['[object String]'];
  getFor['[object Array]'] = getFor['[object Object]'];

  const setFor =  {
      '[object String]' : setForPrimitive 
    , '[object Object]' : setForObject
    , '[object Symbol]' : setForSymbol
  };
  setFor['[object Number]'] = setFor['[object String]'];
  setFor['[object Array]'] = setFor['[object Object]'];
  
  function IndexFactory(__symbolFromObj, __symbolToObj, valuecompare) {
    // In some cases we are looking for value equivalence and in others referenced object equivalence.
    // Implicit behavior is to use referenced object equivalence as valuecompare is undefined.
      // What we really need is dereferencing until real value is reached.
      // And value compare in scope even if the value is  an extremely long stream of bits..
      // Both of these are expensive in terms of scanning and finding the info required.
        // p[p.Index(what, true)] !! is not a value compare for find.
    // We also need to deal with sorting and filtering....
    if(valuecompare) throw "Not yet implemented."
    return function Index(anyThing, bDontCreate){ return utils_1.js.isPrimitive(anyThing) ? anyThing : (__symbolFromObj.get(anyThing) ? __symbolFromObj.get(anyThing) : 
      (()=>{ 
        if(bDontCreate) return
        var newSymbol = Symbol();
        __symbolFromObj.set(anyThing, newSymbol);
        __symbolToObj[newSymbol] = anyThing;
        return newSymbol })()
    ) }
  }
  function AnyStore(){

    // Dispatch based on type of prop.
    var targ = { storeForPrmitives : {}, storeForObjects : new WeakMap(), __symbolToObj : {}, __symbolFromObj : new WeakMap()  };
    var p = new Proxy( targ
      , {
          // PB : TODO -- Proxy handler gets hit for Index function prop..
          get: function (target, prop) { return getFor[utils_1.js.nativeType(prop)](prop, target); }
        , set: function (target, prop, content) { return setFor[utils_1.js.nativeType(prop)](prop, content, target); }
    });
    p.Index = IndexFactory(targ.__symbolFromObj, targ.__symbolToObj);
    p.get = (what)=>{ return p[p.Index(what, true)] };
    p.set = (what, content)=>{ return p[p.Index(what)] = content};
    return p
  }
  AnyStore.create = AnyStore;
  return AnyStore
})();


function expandUint32Array(arr, data) {
	const newArray = new Uint32Array(arr.length + data.length);
	newArray.set(arr);              // copy old data
	newArray.set(data, arr.length); // copy new data after end of old data
	return newArray;
}

const HEX_FFFFFFFF = 0xFFFFFFFF;
const HEX_FFFF0000 = 0xFFFF0000;
const HEX_FF00     = 0xFF00;
const HEX_F0       = 0xF0;
const HEX_0C       = 0x0C;

const MAX_32BITS = HEX_FFFFFFFF;
const MAX_53BITS = Number.MAX_SAFE_INTEGER;

const BIGINT_HEX_FFFFFFFF = BigInt(HEX_FFFFFFFF); 
BigInt(HEX_FFFF0000); 
BigInt(HEX_FF00); 
BigInt(HEX_F0); 
BigInt(HEX_0C); 

const BIGINT_MAX_32BITS = BIGINT_HEX_FFFFFFFF;

const BIGINT_0 = BigInt(0);
const BIGINT_1 = BigInt(1);
BigInt(2);
BigInt(4);
BigInt(8);
BigInt(16);
const BIGINT_32 = BigInt(32);

// Only Positive numbers;
function *bigIntBufferGenerator(bn){
  // len = len || find32BitArrLen(bn); // Inefficeint to detect. Lets just iterate and see where it ends...
  var signal = {};
  var stop = Symbol();
  var i = 0;
  for(;;){
    var bits32 = new Uint32Array(1);
    if(bn > MAX_32BITS){
      bits32[0]= Number((bn & BIGINT_MAX_32BITS));
      signal = (yield {i, bits32}) || {};
      if(signal === stop || signal.done) return {i, bits32};
      bn >>= BIGINT_32;
      i++;
    } 
    else {
      bits32[0] = Number(bn);
      return {i, bits32};
    }
  }
}

function bigIntToBuffer(bn) {
  // if(utils.js.isUndefined(bn) || utils.js.isNull(bn)) throw 'bigIntToBuffer suported only for BigInts...'
  if(!utils_1.js.isBigInt(bn)) throw 'bigIntToBuffer suported only for BigInts...'
  // PB : Note -- bn must be passed in. Callee should validate.
  var buffer = null;  
  var iterator = bigIntBufferGenerator(bn);
  var next = iterator.next();
  if(next && !next.done) buffer = next.value.bits32; 
  else return next.value.bits32;
  while(!(next = iterator.next()).done) {
    // PB : TODO -- Ineffficient copy in a loop !! 
    // It would be really nice to know how much space is needed. In the absence lets do binary expansion.
    buffer = expandUint32Array(buffer, next.value.bits32);
  }
  buffer = expandUint32Array(buffer, next.value.bits32);
  return buffer;
}

function bufferToBigInt(buffer) {
  // PB : Note -- buffer must be a Uint32Array. Callee should validate.
  var bn = BIGINT_0;
  for(var i=buffer.length; --i > -1;){ bn <<= BIGINT_32; bn |= BigInt(buffer[i]); }
  return bn;
}
// A bitmask can also be specified by a index number of the bit in a BitArray
// Implemented as a class to distinguish from a mask value.
  // For convenieance mask value is provided the ability to be passed in as a Number althout BitIndexes are more naturally in the Number Space..
  // mask values larger than 32 bits will implicitly need to be converted to BitArrays.
const BitIndex = (function() { function BitIndex(){ return  this } // BitIndex constructor.
  // Should support Numbers, BigInt and Uint32Array.

  function __is__(t){ if(t === BitIndex) return true; }
  function __is(type){ return typeof this === type ? true : __is__(type) }

  function __create(n){ 
    
    return BitIndex.apply({ 
        value : n 
      , is : __is
    }) 
  }
  
  __create.create = __create;
  return __create
})();

// function leftshift(m){ return utils.js.isNumber(m) ? leftshift_Number(m) : leftshift_BigInt(m) } // Universal.
function leftshift_Number(m){ return m << 1 }
function leftshift_BigInt(m){ return m << BIGINT_1 }
// function leftshift_Uint32Array(m) { throw "leftshift_Uint32Array not yet implemented." }

function indexOfLSB32(x, gptwo){
  // x needs to be a 32 bit number. 
  // Private functions don't do validations to avoid overhead of validation. 
  // Only public api's need to validate inputs.
  if(x === 0) return null;

  var i = 0;
  x & 0xFFFF0000 && (i += 16, x >>= 16),
  x & 0xFF00 && (i += 8, x >>= 8),
  x & 0xF0 && (i += 4, x >>= 4),
  x & 0x0C && (i += 2, x>>= 2),
  x & 2 && (i += 1);
  // x & 1 && (i = 0);
  return i;
}

// PB : TODO -- Not yet implemented... profile to see if this is any more performant.
// function indexOfLSB_BigInt_DeBruijn(x, gptwo){
//   // x needs to be a BigInt. 
//   // gptwo needs to be BigInt
//   // Private functions don't do validations to avoid overhead of validation. 
//   // Only public api's need to validate inputs.
//   if(x === 0) return null;
//   gptwo = gptwo || x & -x;
  
//   // DeBruijn explodes on multiplication and needs to work on BigInts even if the results are containted in 32 bits...
//   // PB : TODO -- Not sure if this is faster. In any case BigInts are slower.
//   var MultiplyDeBruijnBitPosition = [
//     0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8, 
//     31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9
//   ];
//   return MultiplyDeBruijnBitPosition[( ( gptwo * BigInt( 0x077CB531 )) >> BigInt(27) ) % BigInt(32) ];
// }

// https://stackoverflow.com/questions/757059/position-of-least-significant-bit-that-is-set
// http://graphics.stanford.edu/~seander/bithacks.html

const BitArrayUpto32Bits = (function(){
  function validateBitLength(length){ if(length > 32) throw 'BitArrayUpto32Bits doesnt accept BitLength > 32' }

  function __createA(arr){
    validateBitLength(arr.length);
    var created = __create();

    // PB : TODO -- Changes this to preincrement. Mask need not overflow for 32 bits...
    var iterateUpto = [
        ()=>{for(var i =0 ; i < 1; i++) { console.log(i); created.assignMask(arr[i], { title : arr[i]}); }}
      , ()=>{for(var i =1 ; i < Math.min(31, arr.length); i++) { console.log(i); created.assignMask(arr[i], { title : arr[i]}, leftshift_Number ); }}
      , ()=>{for(var i =31; i < Math.min(32, arr.length); i++) { console.log(i); created.assignMask(arr[i], { title : arr[i]}, (m)=>{ return leftshift_Number(m)>>>0 } ); }}
    ];
    arr.length > 31 ? iterateUpto.forEach(f=>f()) :
    arr.length > 1 ? iterateUpto.slice(0,2).forEach(f=>f()) :
      iterateUpto[0]();
    return created;
  }

  function __createO(o){
    var arr = Object.keys(o);
    validateBitLength(arr.length);

    var created = __create();
    
    var iterateUpto = [
        ()=>{for(var i =0 ; i < 1; i++) { console.log(i); created.assignMask(arr[i], o[arr[i]]); }}
      , ()=>{for(var i =1 ; i < Math.min(31, arr.length); i++) { console.log(i); created.assignMask(arr[i], o[arr[i]], leftshift_Number ); }}
      , ()=>{for(var i =31; i < Math.min(32, arr.length); i++) { console.log(i); created.assignMask(arr[i], o[arr[i]], (m)=>{ return leftshift_Number(m)>>>0 } ); }}
    ];
    arr.length > 31 ? iterateUpto.forEach(f=>f()) :
    arr.length > 1 ? iterateUpto.slice(0,2).forEach(f=>f()) :
      iterateUpto[0]();
    
    return created;
  }

  function __create(){
    var labels = {};
    var masks = {};
    
    var currentMaxMask;
    function __nextMask(){ __nextMask = leftshift_Number; 
      return currentMaxMask = 1; }

    // var store = ??? new Uint32Array(1)var mxn = Mixin.create()
    utils_1.assign(mxn, 
    {
      validateMask(m){
        if(__is(m, BitIndex)) { 
          if(m > 32) throw 'BitArrayUpto32Bits doesnt accept BitIndex > 32'
          return { BitIndex, labels : [masks[indexToMask(m.value)]]
            // , indices : m.value
          }
        }
        if(m > MAX_32BITS) throw "BitArrayUpto32Bits only supports numbers upto MAX_32BITS "
        if(!utils_1.js.isNumber(+m)) throw "BitArrayUpto32Bits requires Numbers upto MAX_32BITS "
        return true;
      }
      , labelsToMask : (__labels)=>{ 
        var result = 0; __labels.forEach(l=>{ result |= labels[l]; });
        return result >>> 0;
      }
      , hasMask : function(label) { return labels[label] ? labels[label].mask : null ; }
      , maskToLabels(m, transformEach){
        var valid = this.validateMask(m);
        if(!valid) throw "Invalid Mask"
        if(valid.BitIndex) return valid.labels;
        
        var __labels = [];  
        for(var gptwo;gptwo=m&-m;m^=gptwo) {
          if(!masks[gptwo]) { console.log('Error : Invalid mask passed in.'); }
          else __labels.push( transformEach(masks[Number(gptwo)], labels[masks[Number(gptwo)]]) ); 
        }
        return __labels;
      }
      , labelToMask : (l)=>{ return labels[l] }
      , bit_or  : (a, b)=>a | b
      , bit_and : (a, b)=>a & b
      , bit_xor : (a, b)=>a ^ b
      , bit_not : (a)=> ~a
      
      , assignMask : function(label, entity, incrementFn) {
        var lmask = this.hasMask(label); if(lmask) return lmask; // Already assigned.
        labels[label] = entity;
        labels[label].mask = currentMaxMask = incrementFn ? incrementFn(currentMaxMask) : __nextMask(); // Use the next unused mask for this dictionary of labels. Currently random. We should eventually have a sort order.
        masks[labels[label].mask] = label; 
        return labels[label];
      }
      , msbIndex : function(v) { throw "msb Not yet implemented" }
      , indexToMask : function(index) { 
        if(index > 31) throw 'Not supported beyond 32 bits.'
        return (1 << index) >>> 0; 
      }
      , indicesToMask : function(indices){
        var mask = 0;
        indices.forEach(index=>{ 
          if(index > 31) throw 'Not supported beyond 32 bits.'
          mask |= (1 << index);
        });
        return mask >>> 0;
      }
      , maskToIndices : function(m) {
        var valid = this.validateMask(m);
        if(!valid) throw "Invalid Mask"
        if(valid.BitIndex) return [m.value];
        var indices = [];
        var gptwo;
        for (;gptwo=m&-m;m^=gptwo) indices.push(indexOfLSB32(gptwo));
        return indices;
      }
      , bit_shiftl : (a, s)=>{ return a << s }
      , bit_shiftr : (a, s)=>{ return a >> s }
      , bit_shiftr_uz : (a)=>{ return a >>> 0} // Unsigned right shift by 0.
      // , bit_shiftl_1 : ()=>{}

      , toJSON(radix, eachFn){ 
        var transFormed = {};
        if(!eachFn) return labels;
        Object.keys(labels).forEach(label =>{
          transFormed[label] = eachFn(labels[label]);
        });
        return transFormed;
      }
      , test(){ 
        Object.keys(masks).forEach((v, i)=> {
          console.log( v );
          console.log( i + ' : ' + v.toString(2) ); 
          console.log( this.maskToIndices(v));
        });
        console.log( (173).toString(2) ); 
        this.maskToIndices(173).map( (i)=>{ console.log( i ); }); 
        console.log('indicesToMask :' + this.indicesToMask([1,4,31]).toString(2));
      }
    });
  }
  
  var creatorFor = {
      '[object Array]' : __createA
    , '[object Object]' : __createO
    , 'undefined' : function(){ return __create() }
  };

  // PB : TODO -- Constructor is not preserved... But mixing in an external passed in object is what we want to achive.
  function BitArrayUpto32Bits(){ 
    return arguments.length ? creatorFor[utils_1.js.nativeType(arguments[0])](...arguments) : 
            creatorFor['undefined'](...arguments)}

  BitArrayUpto32Bits.create = BitArrayUpto32Bits;
  return BitArrayUpto32Bits
})();

const Mixin = (function(){

  function create(){

    var __mixins = new WeakMap();
    __mixins.set(Mixin, true);
  
    function __is__(t, type){ 
      if(utils_1.js.isPrimitive(t)) return false; 
      if(!t || !t.mixins) return false;
      return t.mixins().get(type) ? true : false ; }
    function __is(v, type){ return typeof v === type ? true : __is__(v, type) }
  
    return { addMixin : (clazz)=>{ __mixins.set(clazz, true);} 
      , is : __is
    }
  }

  return {create}
})();

const BitArrayBigInt = (function(){

  
  function __createA(arr){
    var created = __create();

    for(var i =0 ; i < 1; i++) { created.assignMask(arr[i], { title : arr[i]}); }
    for(var i =1 ; i < arr.length; i++) { created.assignMask(arr[i], { title : arr[i]}, leftshift_BigInt ); }
    return created;
  }

  function __createO(o){
    var arr = Object.keys(o);
    var created = __create();
    
    for(var i =0 ; i < 1; i++) { created.assignMask(arr[i], o[arr[i]]); }
    for(var i =1 ; i < arr.length; i++) { created.assignMask(arr[i], o[arr[i]], leftshift_BigInt ); }
    
    return created;
  }

  function __create(){
    var labels = {};
    var masks = {};
    
    var currentMaxMask;
    function __nextMask(){ __nextMask = leftshift_BigInt; 
      return currentMaxMask = BIGINT_1; }

    // var store = ??? new Uint32Array(1)
    var mxn = Mixin.create();
    var created = utils_1.assign(mxn, 
      {
        validateMask(m){
          if(mxn.is(m, BitIndex)) { 
            return { BitIndex, labels : [masks[indexToMask(m.value)]] }
          }
          if(!utils_1.js.isBigInt(BigInt(m))) throw "BitArrayBigInt requires BigInt Mask "
          return true;
        }
        , labelsToMask : (__labels)=>{ 
          var result = BIGINT_0; __labels.forEach(l=>{ result |= labels[l]; });
          return result ;
        }
        , hasMask : function(label) { return labels[label] ? labels[label].mask : null ; }
        , maskToLabels(m, transformEach){
          m = BigInt(m);
          var valid = this.validateMask(m);
          if(!valid) throw "Invalid Mask"
          if(valid.BitIndex) return valid.labels;
          
          var __labels = [];  
          for(var gptwo;gptwo=m&-m;m^=gptwo) {
            if(!masks[gptwo]) { console.log('Error : Invalid mask passed in.'); }
            else __labels.push( transformEach(masks[Number(gptwo)], labels[masks[Number(gptwo)]]) ); 
          }
          return __labels;
        }
        , labelToMask : (l)=>{ return labels[l] }
        , bit_or  : (a, b)=>a | b
        , bit_and : (a, b)=>a & b
        , bit_xor : (a, b)=>a ^ b
        , bit_not : (a)=> ~a
        
        , assignMask : function(label, entity, incrementFn) {
          var lmask = this.hasMask(label); if(lmask) throw `Duplicate assignment for same label ${label} not allowed : mask (${lmask}) `  // Already assigned.
          labels[label] = entity;
          labels[label].mask = currentMaxMask = incrementFn ? incrementFn(currentMaxMask) : __nextMask(); // Use the next unused mask for this dictionary of labels. Currently random. We should eventually have a sort order.
          masks[labels[label].mask] = label; 
          return labels[label];
        }
        , msbIndex : function(v) { throw "msb Not yet implemented" }
        , indexToMask : function(index) { 
          return BIGINT_1 << index; 
        }
        , indicesToMask : function(indices){
          var mask = 0;
          indices.forEach(index=>{ 
            mask |= (1 << index);
          });
          return mask;
        }
        , maskToIndices : function(m) {
          var valid = this.validateMask(m);
          if(!valid) throw "Invalid Mask"
          if(valid.BitIndex) return [m.value];
          var indices = [];
          var gptwo;
          
          var iterator = bigIntBufferGenerator(BigInt(m));
            
          var next;
          // if(next && !next.done) buffer = next.value.bits32; 
          // else return next.value.bits32;
          var i = 0;
          while(!(next = iterator.next()).done) {
            next.value.bits32 > 0 ? 
              ( ()=> { for(;gptwo=(next.value.bits32& -next.value.bits32) ;next.value.bits32^=gptwo) indices.push(32 * i + indexOfLSB32(gptwo)); } )
                : null;
            i++;
          }
          for(;gptwo=(next.value.bits32&-next.value.bits32);next.value.bits32^=gptwo) indices.push(32 * i + indexOfLSB32(gptwo));
          
          return indices;
        }
        , bit_shiftl : (a, s)=>{ return a << s }
        , bit_shiftr : (a, s)=>{ return a >> s }
        , bit_shiftr_uz : (a)=>{ throw "BigInt doesnt suppored unsigned right shift."} // Unsigned right shift by 0.
        // , bit_shiftl_1 : ()=>{}
        , toJSON(radix, eachFn){ 
          var transFormed = {};
          if(!eachFn) return labels;
          Object.keys(labels).forEach(label =>{
            transFormed[label] = eachFn(labels[label]);
          });
          return transFormed;
        }
        , tosqlcte() {

          var select = '';
          // debugger
          Object.keys(labels).forEach((label, index, array) =>{
            var labelObject = labels[label];
            var rowselect = 'select ';
            Object.keys(labelObject).forEach((key, index, array) =>{
              rowselect = rowselect + ` '${labelObject[key]}' ${key}`;
              if(array.length !== index+1) rowselect = rowselect + ',';
            });
            select = select + rowselect;
            if(array.length !== index+1) select = select + '\n union all \n';
          });
  
          console.log(select);
          return labels
    
  
        }
        , test(){ 
          Object.keys(masks).forEach((v, i)=> {
            console.log( v );
            console.log( i + ' : ' + v.toString(2) ); 
            console.log( this.maskToIndices(v));
          });
          console.log( (173).toString(2) ); 
          this.maskToIndices(173).map( (i)=>{ console.log( i ); }); 
          console.log('indicesToMask :' + this.indicesToMask([1,4,31]).toString(2));
          console.log(BigInt(2535301200456458802993406410752));
          console.log('bigIntToBuffer : ' + bigIntToBuffer(BigInt(2535301200456458802993406410752) ));
          console.log('bufferToBigInt : ' + bufferToBigInt( bigIntToBuffer(BigInt(2535301200456458802993406410752)) ));
        }
      }
    );
    created.addMixin(BitArrayBigInt);
    return created;
  }
  
  var creatorFor = {
      '[object Array]' : __createA
    , '[object Object]' : __createO
    , 'undefined' : function(){ return __create() }
  };

  // PB : TODO -- Constructor is not preserved... But mixing in an external passed in object is what we want to achive.
  function BitArrayBigInt(){ 
    return arguments.length ? creatorFor[utils_1.js.nativeType(arguments[0])](...arguments) : 
            creatorFor['undefined'](...arguments)}

  BitArrayBigInt.create = BitArrayBigInt;
  return BitArrayBigInt
})();

// > 32 bits upto 53 bits.
const BitArrayUpto53Bits = (function(){

  function validateBitLength(length){ if(length > 53) throw 'BitArrayUpto53Bits doesnt accept BitLength > 53' }

  function __createO(o, options){
    var arr = Object.keys(o);
    validateBitLength(arr.length);

    var created = __create();
    
    var iterateUpto = [
      ()=>{for(var i =0 ; i < 1; i++) { console.log(i); created.assignMask(arr[i], o[arr[i]]); }}
    , ()=>{for(var i =1 ; i < Math.min(31, arr.length); i++) { console.log(i); created.assignMask(arr[i], o[arr[i]], leftshift_Number ); }}
    , ()=>{for(var i =31; i < Math.min(32, arr.length); i++) { console.log(i); created.assignMask(arr[i], o[arr[i]], (m)=>{ return leftshift_Number(m)>>>0 } ); }}
    , ()=>{for(var i =32; i < Math.min(53, arr.length); i++) { console.log(i); created.assignMask(arr[i], o[arr[i]], (m)=>{ return Number(BigInt(m) << BIGINT_1) } ); }}
    ];
    arr.length > 32 ? iterateUpto.forEach(f=>f()) :
    arr.length > 31 ? iterateUpto.slice(0,3).forEach(f=>f()) :
    arr.length > 1 ? iterateUpto.slice(0,2).forEach(f=>f()) :
      iterateUpto[0]();
    
    return created;
  }

  function __createA(arrInp, options){
    validateBitLength(arrInp.length);

    var created = __create();
    
    var arr = [];
    var pregencache = [];
    // PB : Changed to preincrement. Mask need not overflow for 53 bits...
    var iterateUpto = [
          (prelen)=>{for(var i =Math.max(0, prelen) ; i < 1; i++) { console.log(i); created.assignMask(arr[i-prelen], pregencache[arr[i-prelen]] || { title : arr[i-prelen]} ); }}
        , (prelen)=>{for(var i =Math.max(1, prelen) ; i < Math.min(31, arr.length + prelen); i++) { console.log(i); created.assignMask(arr[i-prelen], pregencache[arr[i-prelen]] || { title : arr[i-prelen]}, leftshift_Number ); }}
        , (prelen)=>{for(var i =Math.max(31, prelen); i < Math.min(32, arr.length + prelen); i++) { console.log(i); created.assignMask(arr[i-prelen], pregencache[arr[i-prelen]] || { title : arr[i-prelen]}, (m)=>{ return leftshift_Number(m)>>>0 } ); }}
        , (prelen)=>{for(var i =Math.max(32, prelen); i < Math.min(53, arr.length + prelen); i++) { console.log(i); created.assignMask(arr[i-prelen], pregencache[arr[i-prelen]] || { title : arr[i-prelen]}, (m)=>{ return Number(BigInt(m) << BIGINT_1) } ); }}
      ];
    
    if(options && options.pregenerated) {
      arrInp.forEach((inp=>{ 
        if(!options.pregenerated[inp] || !options.pregenerated[inp].mask) {
          // Doesn't have a mask so needs generation.
          arr.push(inp);
          pregencache[inp] = options.pregenerated[inp];
        }
        else if(!options.pregenerated[inp]) arr.push(inp);
      }));
      
      Object.keys(options.pregenerated).forEach(p=>{
        if(pregencache[p]) return;
        created.assignMask(p, options.pregenerated[p], created.assignMaxAsNextIncrement );
      });
      var prelen = Object.keys(created.toJSON()).length;
      prelen > 31 ? iterateUpto.slice(3).forEach(f=>f(prelen)) :
      prelen > 30 ? 
          (prelen + arr.length) > 32 ? iterateUpto.slice(2).forEach(f=>f(prelen)) 
            : iterateUpto.slice(2, 3).forEach(f=>f(prelen)) 
        :
      prelen > 0 ? 
          (prelen + arr.length) > 32 ? iterateUpto.slice(1).forEach(f=>f(prelen)) 
            : (prelen + arr.length) > 31 ? iterateUpto.slice(1,3).forEach(f=>f(prelen)) :
              iterateUpto.slice(1,2).forEach(f=>f(prelen))
        :
          arr.length > 32 ? iterateUpto.forEach(f=>f(prelen)) :
          arr.length > 31 ? iterateUpto.slice(0,3).forEach(f=>f(prelen)) :
          arr.length > 1 ? iterateUpto.slice(0,2).forEach(f=>f(prelen)) :
            iterateUpto[0](prelen);
    }
    else {
      arr = arrInp;
      arr.length > 32 ? iterateUpto.forEach(f=>f(0)) :
      arr.length > 31 ? iterateUpto.slice(0,3).forEach(f=>f(0)) :
      arr.length > 1 ? iterateUpto.slice(0,2).forEach(f=>f(0)) :
        iterateUpto[0](0);
    }

    return created;
  }

  function __create(){
    var labels = {};
    var masks = {};
    
    var currentMaxMask;
    function __nextMask(){ __nextMask = leftshift_Number; 
      return currentMaxMask = 1; }
    
    

    // var store = ??? new Uint32Array(1)
    var mxn = Mixin.create();
    var created = utils_1.assign(mxn, 
      {
  
        assignMaxAsNextIncrement(possibleMax) {
          if(currentMaxMask && currentMaxMask < possibleMax) currentMaxMask = possibleMax;
          else currentMaxMask = possibleMax;
        }
      , validateMask(m){
        if(mxn.is(m, BitIndex)) { 
          return { BitIndex, labels : [masks[indexToMask(m.value)]] }
        }
        if(m > MAX_53BITS) throw "BitArrayUpto53Bits only supports numbers upto MAX_53BITS "
        if(!utils_1.js.isNumber(+m)) throw "BitArrayUpto53Bits requires Numbers upto MAX_53BITS "
        return true;
      }
      , labelsToMask : (__labels)=>{ 
        var result = 0; __labels.forEach(l=>{ result |= labels[l]; });
        return result >>> 0;
      }
      , hasMask : function(label) { return labels[label] ? labels[label].mask : null ; }
      , maskToLabels(m, transformEach){

        var valid = this.validateMask(m);
        if(!valid) throw "Invalid Mask"
        if(valid.BitIndex) return valid.labels;
        
        var __labels = [];  
        var m = BigInt(m);
        // for(var gptwo;gptwo=this.bit_and(m,-m); gptwo = this.bit_xor(m,gptwo)) {
        for(var gptwo;gptwo=m&-m;m^=gptwo) {
          if(!masks[Number(gptwo)]) { console.log('Error : Invalid mask passed in.'); }
          else __labels.push( transformEach(masks[Number(gptwo)], labels[masks[Number(gptwo)]]) ); 
        }
        return __labels;
      }
      , labelToMask : (l)=>{ return labels[l] }
      , bit_or  : (a, b) => {
        return bit_opFn_Upto53(a,b, (a, b)=>a | b) 
       }
     , bit_and : (a, b) => bit_opFn_Upto53(a,b, (a, b)=>a & b) 
     , bit_xor : (a, b) => bit_opFn_Upto53(a,b, (a, b)=>a ^ b)
     , bit_not : (a) => Number(~BigInt(a))
      , assignMask : function(label, entity, onassignment) {
        
        if(entity && entity.mask && masks[entity.mask]) {
          throw 'Mask collision. Cannot assign requested mask. ' + entity
        }
        var pregenerated = labels[label] || entity;
        // var lmask = this.hasMask(label); if(lmask) return lmask; // Already assigned.
        // Everything is overridable except mask.
        if(pregenerated && pregenerated.mask)  {
          onassignment = (onassignment || created.assignMaxAsNextIncrement);
          
          labels[label] = utils_1.assign(pregenerated, entity, {mask : pregenerated.mask});
          onassignment(pregenerated.mask);
        }
        else {
          onassignment = (onassignment || __nextMask);

          labels[label] = entity;
          labels[label].mask = currentMaxMask = onassignment ? onassignment(currentMaxMask) : __nextMask(); // Use the next unused mask for this dictionary of labels. Currently random. We should eventually have a sort order.
        }
        masks[labels[label].mask] = label; 
        return labels[label];
      }
      , msbIndex : function(v) { throw "msb Not yet implemented" }
      , indexToMask : function(index) { 
        if(index > 52) throw 'Not supported beyond 53 bits.'
        return Number(BigInt(1) << BigInt(index)); 
      }
      , indicesToMask : function(indices){
        var mask = BigInt(0);
        indices.forEach(index=>{ 
          if(index > 52) throw 'Not supported beyond 53 bits.'
          mask |= (BIGINT_1 << BigInt(index));
        });
        return Number(mask);
      }
      , maskToIndices : function(m) {
        var valid = this.validateMask(m);
        if(!valid) throw "Invalid Mask"
        if(valid.BitIndex) return [m.value];
        var indices = [];
        var gptwo;
        if(m > MAX_32BITS) {
          var iterator = bigIntBufferGenerator(BigInt(m));
          
          var next;
          // if(next && !next.done) buffer = next.value.bits32; 
          // else return next.value.bits32;
          var i = 0;
          while(!(next = iterator.next()).done) {
            next.value.bits32 > 0 ? 
              ( ()=> { for(;gptwo=(next.value.bits32& -next.value.bits32) ;next.value.bits32^=gptwo) indices.push(32 * i + indexOfLSB32(gptwo)); } )
                : null;
            i++;
          }
          for(;gptwo=(next.value.bits32&-next.value.bits32);next.value.bits32^=gptwo) indices.push(32 * i + indexOfLSB32(gptwo));
        }
        else {
          m = Number(m);
          for (;gptwo=m&-m;m^=gptwo) indices.push(indexOfLSB32(gptwo)); }
          // for (;gptwo=BigInt(m)&BigInt(-m);m^=gptwo) indices.push(indexOfLSB32(m, gptwo))
        
        return indices;
      }
      , bit_shiftl : (a, s)=>{ return a << s }
      , bit_shiftr : (a, s)=>{ return a >> s }
      , bit_shiftr_uz : (a)=>{ return a >>> 0} // Unsigned right shift by 0.
      // , bit_shiftl_1 : ()=>{}
      , toJSON(radix, eachFn){ 
        var transFormed = {};
        if(!eachFn) return labels;
        Object.keys(labels).forEach(label =>{
          transFormed[label] = eachFn(labels[label]);
        });
        return transFormed;
      }
      , tosqlcte() {

        var select = '';
        // debugger
        Object.keys(labels).forEach((label, index, array) =>{
          var labelObject = labels[label];
          var rowselect = 'select ';
          Object.keys(labelObject).forEach((key, index, array) =>{
            rowselect = rowselect + ` '${labelObject[key]}' ${key}`;
            if(array.length !== index+1) rowselect = rowselect + ',';
          });
          select = select + rowselect;
          if(array.length !== index+1) select = select + '\n union all \n';
        });

        console.log(select);
        return labels
  

      }
      , test(){ 
        Object.keys(masks).forEach((v, i)=> {
          console.log( v );
          console.log( i + ' : ' + v.toString(2) ); 
          console.log( this.maskToIndices(v));
        });
        console.log( (173).toString(2) ); 
        this.maskToIndices(173).map( (i)=>{ console.log( i ); }); 
        console.log('indicesToMask :' + this.indicesToMask([1,4,31]).toString(2));
      }
    });

    return created;
  }
  
  var creatorFor = {
      '[object Array]' : __createA
    , '[object Object]' : __createO
    , 'undefined' : function(){ return __create() }
    
  };

  // PB : TODO -- Constructor is not preserved... But mixing in an external passed in object is what we want to achive.
  function BitArrayUpto53Bits(){ 
    return arguments.length ? creatorFor[utils_1.js.nativeType(arguments[0])](...arguments) : 
            creatorFor['undefined'](...arguments)}

  BitArrayUpto53Bits.create = BitArrayUpto53Bits;
  return BitArrayUpto53Bits
})();
function bit_opFn_Upto53(a, b, opFn){

  return Number(opFn(BigInt(a), BigInt(b) ))
  // var result = new Uint32Array(2);
  // result[0] = opFn( (a / POWER32)>>0 , (b / POWER32)>>0 ) 
  // result[1] = opFn(a % POWER32, b % POWER32)
  // return POWER32 * result[0] + result[1];
}

// An arbitrarily-wide array of bits. Can be used for bitmasks longer than 32 bits in JS.
const BitArray = (function(){

  // const NEEDS_BIT_SPLIT = (b)=> b > Number.MAX_SAFE_INTEGER;
  // const MAX_SAFE_MASK_LENGTH = 32

  // function getMinMax(a, b){
  //   return a.length > b.length ? { min : b.length, minX : b, max : a.length, maxX : a } 
  //       : { min : a.length, minX : a, max : b.length, maxX : b }
  // }

  // function getTypes(a, b){
  //   var aIsPrimitive = utils.js.isPrimitive(a);
  //   var bIsPrimitive = utils.js.isPrimitive(b);
  //   return { a : aIsPrimitive, b : bIsPrimitive  }
  // }

  // // Binary oprations
  // function bit_opFn(a, b, opFn){
  //   var tt = getTypes(a, b);
  //   var mm = {}
  //   var getRemaining = function(){ return mm.maxX.subarray(mm.min, mm.max-1)}
  //   if(tt.a && tt.b) {
  //     // both are primitive
  //     mm = { min : 1, minX : [a], max : 1, maxX : [b]}
  //     getRemaining = function(){ return []}
  //   }
  //   else if(tt.a){
  //     // b is bitarray
  //     mm = { min : 1, minX : [a], max : b.length, maxX : b}
  //   }
  //   else if(tt.b){
  //     mm = { min : 1, minX : [b], max : a.length, maxX : a}
  //   }
  //   else {
  //     var mm = getMinMax(a, b)
  //   }

  //   var result = new Uint32Array(mm.max);
  //   for (var i = 0; i < mm.min; ++i) { result.set( [opFn(mm.minX[i], mm.maxX[i])], i) }
  //   // js.utils.isPrimitive(mm.maxX) ?  
  //   var remaining = getRemaining()
  //   remaining.length > 0 ? result.set( remaining, mm.min) : null;
  //   return result;
  // }

  // // Unary operations
  // function bit_opFnU(mm, opFn){
  //   var result = new Uint32Array(mm.length);
  //   for (var i = 0; i < mm.min; ++i) { result.set( opFn(a), i) }
  //   result.set( mm.maxX.subarray(mm.min, mm.max-1), mm.min)
  //   return result;
  // } 
  // function __expand(){

  // }
  
  function __createA(arr){
    // Create a new BitArray
    // Assign Unique bits to each item in an array of labels.
    arr.length % 32;
    arr.length/32 >>> 0;
    var created = arr.length > 53 ? 
      BitArrayBigInt.create(...arguments) : arr.length > 32 ?
      BitArrayUpto53Bits.create(...arguments) : 
      BitArrayUpto32Bits.create(...arguments);
    return created;
  }

  function __createO(o){
    // Create a new BitArray
    // Assign Unique bits to each item in an array of labels.
    var arr = Object.keys(o);

    arr.length % 32;
    arr.length/32 >>> 0;
    var created = arr.length > 53 ? 
      BitArrayBigInt.create(...arguments) : arr.length > 32 ?
      BitArrayUpto53Bits.create(...arguments) : 
      BitArrayUpto32Bits.create(...arguments);
    return created;
  }

  function __create(){


    // var store = new Uint32Array(1)
    Mixin.create();
    var created = BitArrayBigInt.create();
    created.addMixin(BitArray);
    return created;
  }

  var creatorFor = {
      '[object Array]' : __createA
    , '[object Object]' : __createO
    , 'undefined' : function(){ return __create() }
  };
  // PB : TODO -- Constructor for BitArrays read from files that have been generated and saved.
  // PB : TODO -- Constructor is not preserved... But mixing in an external passed in object is what we want to achive.
   function BitArray(){ 
    return arguments.length ? creatorFor[utils_1.js.nativeType(arguments[0])](...arguments) : 
            creatorFor['undefined'](...arguments)}
  BitArray.create = BitArray;
  return BitArray
})();


// var uuidv1 = utils.core.uuidV1;
const { v1: uuidv1 } = uuid_1;
console.log(uuidv1);

// Mixins.
const mixs = { 
  // __JSTPL : (function() {
  //   function __f() {}
  //   return function() {
  //     this.f = __f;
  //     return this;
  //   };
  // })()
  
  // Return a set of mixins.
  
  kernelMixin : (function() {

      // Wrapper to generate the currently chosen UUID version
      // In JS UUID v4 vs v1 -> In browsers v1 has the timestamp but uses a random number for the node part. 
      function __getuuid() {  
        return uuidv1();
      }
    
      // uuid property Mainstream getter after lazy init
      function __get() { 
        return this.kernel.uuidv1; 
      }

      // uuid property First Time getter for lazy init.
      function __firstGet() { 
        this.kernel.uuidv1 = __getuuid();
        
        __finalize.apply(this);
        return this.uuid;
      }

      function __finalize(){
        Object.defineProperty(this.kernel, 'uuidv1', { writable : false, configurable : false});
        Object.defineProperty(this, 'uuid', {
          
          get : __get
          , enumerable : true
          , configurable : false
        });

        Object.defineProperty(this, 'kernel', {
          
            enumerable : false
          , configurable : false
          , writable : false
        });
      }

      function __defineKernel(){

        // MAC and time. Guaranteed unique unless generated way too fast or parallelly.
        //const uuidv1 = utils.core.uuidV1; // (date-time and MAC address)
        //const uuidv2 = // (date-time and MAC Address, DCE security version)
        
        // (namespace name-based) ...
        //const uuidv3md5 = require('uuid/v3');  
        //const uuidv5sha1 = require('uuid/v3');  // SHA1(v5) is broken
        
        //const uuidv4 = require('uuid/v4');  //(random)
                  
        
        // Kernel Properties are promoted onto the object itself without value as getters and setters as 
        //  configurable = false
        //  enumerable = false
        //  writable = false
        Object.defineProperty(this, 'kernel', { value :{},  writable : true });

        
        // Keep it lazy. Only generate on first use. Which could be first time persistence.
        Object.defineProperty(this.kernel, 'uuidv1', { writable : true, configurable : true});

        // PB : TODO -- Note : A hash of the content may need to be computed dynamically. 
        // The best place to do this is on persistance. In memory objects undergo a lot of changes so the hash keeps varying.
        // It therefore becomes unnecessary to compute the hash very frequently. We may need to do  this lazily when accessed or
        // simply use all attributes for comparison. The value of a hash is useful only when the attributes are not changing
        //  and the hash is precomputed and ready to be used. We need to use gits methodology to track changes.
      }

      function __loadKernel() {
        // Reinitialize the kernel for an object that already has a uuid probably loaded from a JSON.
        this.kernel.uuidv1 = this.uuid;
        __finalize.apply(this);
      }

      function __attachKernel() {

        // Dont mess with something that already has a kernel.
        if(this.hasOwnProperty('kernel')) {
          l('Already has kernel');
          return this;
        }

        __defineKernel.apply(this);

        if(this.hasOwnProperty('uuid')) {
          l('Already has uuid');
          __loadKernel.apply(this);
          
          return this;
        }        
        Object.defineProperty(this, 'uuid', { get : __firstGet, configurable : true});
        return this;
      }

      var __kernelInstanceMixin = function() {
        return __attachKernel.apply(this);
      };
      __kernelInstanceMixin.getuuid = __getuuid;
      return __kernelInstanceMixin;
  })()

  // Publishes messages to a message queue broker or mediator.
  , publisherMixin : (function() {
      function __publish() {

      }
      return function() {
        this.publish = __publish;
        return this;
      };
  })()
};

// Note : Prophelpers are not mixed into the object and hence need to be applied on some other object.
const helpers = {
    indexHelper : indexHelper
  , meta : (function() {
    
    // Mainly to observe changes to object properties.
    // A kernel uuid is a prerequisite.
    function spy(obj, prop, action) {
      action = action || 'set';
      if(action != 'set') {
        throw 'Currently only set actions can be observed on properties';
      }

      // Get the current descriptor
      var descriptor = Object.getOwnPropertyDescriptor(obj, prop);
      var value = obj[prop];
      
      if(descriptor && descriptor.get && descriptor.get.$meta){
        var originalset = descriptor.set;
        descriptor.set = function(newValue) {
          globalThis_1.mediator.publish(obj.uuid + '.' + prop, 'willchange', {from : value, to : newValue});
          originalset(newValue);
          globalThis_1.mediator.publish(obj.uuid + '.' + prop, 'haschanged', {from : value, to : newValue});
        };
        return this;
      }
      
      descriptor = {
        get: function() {
          return value;
        },
        set: function(newValue) {
          globalThis_1.mediator.publish([obj.uuid, prop, 'willchange'], {from : value, to : newValue});
          value = newValue;
          globalThis_1.mediator.publish([obj.uuid, prop, 'haschanged' ], {from : value, to : newValue});
        }
      };
      descriptor.get.$meta = {};
      Object.defineProperty(obj, prop, descriptor);
      return this;
    }

    function getCustomPropertyDescriptor(obj, prop) {
      var actualDescriptor = Object.getOwnPropertyDescriptor(obj, prop);
      if (actualDescriptor && actualDescriptor.get && actualDescriptor.get.$meta) {
        return actualDescriptor;
      }
    
      var value = obj[prop];
      var descriptor = {
        get: function() {
          return value;
        },
        set: function(newValue) {
          value = newValue;
        }
      };
      descriptor.get.$meta = {};
    
      Object.defineProperty(obj, prop, descriptor);
      return Object.getOwnPropertyDescriptor(obj, prop);
    }

    function setPropertyAttribute(obj, propertyName, attributeName, attributeValue) {
      var descriptor = getCustomPropertyDescriptor(obj, propertyName);
    
      descriptor.get.$meta[attributeName] = attributeValue;
    }

    function getPropertyAttributes(obj, propertyName) {
      var descriptor = getCustomPropertyDescriptor(obj, propertyName);
    
      return descriptor.get.$meta;
    }
    
    function getPropertyAttribute(obj, propertyName, attributeName) {
      return getPropertyAttributes(obj, propertyName)[attributeName];
    }

    return function(obj) {
      obj.getPropertyAttribute = getPropertyAttribute;
      obj.getPropertyAttributes = getPropertyAttributes;
      obj.setPropertyAttribute = setPropertyAttribute;
      obj.spy = spy;
      
      return obj;
    };
  })()    
};

var core = function(object){
  // l('in \tFunction core')
  return {
      mixs
    , helpers
    , AnyStore
    , BitArray
    , BitArrayUpto32Bits
    , BitArrayUpto53Bits
    , BitArrayBigInt
    // core object instances
    , uuidv1
    , Rule
    , uuidv1
  }
};

// export default core;
var core_1 = core;
// console.dir(__g.mediator)
// try {
//   console.log( '__g === global : ' + (__g === global) )
// }
// catch(e){
//   console.log( '__g === global : ' + false )
// }
// try {
//   console.log( '__g === globalThis : ' + (__g === globalThis) )
// }
// catch(e){
//   console.log( '__g === globalThis : ' + false )
// }


function *bigIntBitGenerator(){
  var signal = {};
  var stop = Symbol();
  var iId = 0;
  var bit = BIGINT_1;
  for(;;){
    signal = (yield { iId, bit }) || {};
    if(signal === stop || signal.done) return { iId, bit };
    bit = bit << BIGINT_1;
    iId++;
  }
}

var Rule = (function(){


  // Immutable private static.
  var __Rule = {};

  // Overridable public static shared on the instance as well as convenience functions. 
  // When the extend method is used the instance methods also correspond.
  // IMP : NOTE -- However instance overrides do not switch the static ones attached to the class.
  // These could also be called statically with call or apply Eg: fn.apply(this)
  var _XRule = { assignbit, getParticipating };
  // Extendable public static
    // _Rule should not be referenced anywhere... as its members can be swithed.

  
  var _Rule = {
    
    extend : function(extension){
      
      function __create(){ return init.call({}) }
      function __createO(o){ return init.call(o) }
      function __createA(a){ a.forEach(r=> __createO(r)); return a }
      var creatorFor = {
          '[object Array]' : __createA
        , '[object Object]' : __createO
        , 'undefined' : function(){ return __create() }
      };
    
      function Rule(){  return arguments.length ? creatorFor[utils_1.js.nativeType(arguments[0])](...arguments) :  creatorFor['undefined'](...arguments) }

      // All static extensions shall be available on the instance as well.
      var _extension = utils_1.assign({}, _XRule, extension);
      function init() {  return utils_1.assign(this, rProto, _extension, __newInstance(this), this) }      _extension.init = init;
      utils_1.assign(Rule, _Rule, _extension, __Rule);
  
      // Immutable public static methods.
      Rule.create = Rule;
      Rule.build = buildRules;
      Rule.match = match;
      Rule.connect = connectRules;
      Rule.branch = function(as, ...rest){
        // PB : TODO -- All lists will be invalidated when we splice rules in...
        // Rule.create()
        // Replace an exisiting rule node with an intermediate rule that connects this rule to another rule.
        console.error('Not yet implemented.');
      };

      // from loopback-connector/lib/sql.js 
      // PB : TODO --  a generic multipurpose buildwhere which doesn't enforce model property existence 
      //  Convert from a natural filter to key val expanded filter.
      //  Convert In clauses to one rule for each listed values.
      //  Do not output the where clause but inlude the operator in the result assosiated with the respective params.
      // Handle mask overflows gracefully
      /**
       * @param where
       * @returns {ChoppedRules}
       */
      function buildRules(where, data, fullResult, parentRule) {
        let columnValue;
        if (!where) return Promise.resolve(fullResult) ;

        if (typeof where !== 'object' || Array.isArray(where)) {
          debug('Invalid value for where: %j', where);
          return Promise.resolve(fullResult);
        }
    
        var ruleset = [];
        // var id = Object.keys(where).length > 1 ? null : data ? data.id : null; 
        var id = data ? data.id : null;
        fullResult = fullResult || [];
        var createIntermediate = createIntermediateParentLess; 
        var immediateParentP = null;
        if(parentRule) {
          immediateParentP = parentRule;
          createIntermediate = createIntermediateWithParent;
        }

        if(Object.keys(where).length > 1) {
          immediateParentP = createIntermediate({operator : AND}, ()=>{ return [] }, parentRule);
          ruleset.push(immediateParentP); 
          fullResult.push(immediateParentP);
          createIntermediate = createIntermediateWithParent;
        }

        for (const key in where) {
          // Handle and/or operators
          if (key === AND || key === OR) {
            const clauses = where[key];
            if (Array.isArray(clauses)) {
              if(clauses.length > 1) {
                var rp = createIntermediate({operator : key}, (rParent)=>{      
                  var list = [];
                  for (let i = 0, n = clauses.length; i < n; i++) {
                    list.push(buildRules(clauses[i], null, fullResult).then( ruleForClause => {
                      connectRules(operators[rParent.operator].bit, ruleForClause, rParent);
                      return ruleForClause;
                    }));
                  }
                  return list;
                }, immediateParentP);
                ruleset.push(rp);
                fullResult.push(rp);
              }
              else {
                // An outer 'or' OR 'and' condition is meaningless if we have only 1 clause. At least two are required to make sense.
                // We just drop the wrapped grouped (or or and) condition and promote then inner clause to the same level. =
                var rP = buildRules(clauses[0], null, fullResult, immediateParentP);
                // fullResult.push(rP) // Buildrules should should have already pushed this. 
                ruleset.push(rP); // buildRules should have already linked parent and child.
              }
              continue;
            }
            else {
              throw 'Invalid filter '
            }
          }
          // eslint-disable one-var
          let expression = where[key];
          let p = key;
          var op ='eq';
          const columnName = columnEscaped(/* modelinstance || */ where, key);
          // eslint-enable one-var
          if (expression === null || expression === undefined) {
            // If null has been passed in we should match null.
            expression = null;
            
            var rpromise = assignbit(Rule.create({ key : columnName, value : toColumnValue(p, expression)})).then((rChild)=>{
              if(immediateParentP) {
                return immediateParentP.then((immediateParent)=> {
                  connectRules(operators[immediateParent.operator].bit, rChild, immediateParent);
                  return rChild   
                })
              }

              // PB : TODO -- Unwrapped decendents update on parent!!!
              return rChild
            }).catch(e=>{ console.error('null expression : ' + e); });
            
            fullResult.push(rpromise);
            ruleset.push(rpromise);
          } else if (expression && expression.constructor === Object) {
            const operator = Object.keys(expression)[0];
            expression = expression[operator];
            if (operator === INQ || operator === NIN || operator === BETWEEN) {
              columnValue = [];
              op = operator === INQ ? (EQ) : operator === NIN ? (NEQ) : (LTE);
              if (Array.isArray(expression)) {
                // Column value is a list
                for (let j = 0, m = expression.length; j < m; j++) {
                  columnValue.push(toColumnValue(p, expression[j]));  
                }
              } else {
                // Loopback keys arrays with an string key called '[]' for operators with an array value. This is weird.
                columnValue.push(toColumnValue(p, expression['[]'] || expression ));
              }

              if (operator === BETWEEN) {
                var rp = createIntermediate({operator : AND}, (rParent)=>{
                  // BETWEEN v1 AND v2
                  columnValue[0] === undefined ? null : columnValue[0];
                  columnValue[1] === undefined ? null : columnValue[1];
                  if(expression.length !== 2) console.error('Invalid between operator parameter length');
  
                  var list = [];
                  list.push(assignbit(Rule.create({key : columnName, value : columnValue[0], operator : GTE})).then((rChild)=>{
                    connectRules(operators[rParent.operator].bit, rChild, rParent);
                    return rChild
                  }));
                  list.push(assignbit(Rule.create({key : columnName, value : columnValue[1], operator : LTE})).then((rChild)=>{
                    connectRules(operators[rParent.operator].bit, rChild, rParent);
                    return rChild
                  }));
                  fullResult.push.apply(fullResult, list);
                  return list;
                }, immediateParentP);
                ruleset.push(rp);
                fullResult.push(rp);

              } else {
                var rp = createIntermediate({operator : OR}, (rParent)=>{
                  // IN (v1,v2,v3) or NOT IN (v1,v2,v3)
                  // PB : TODO -- loopbacks handling of nulls is questionable. Invalid rules match nulls and return data.
                  if (columnValue.length === 0) {
                    if (operator === INQ) {
                      columnValue = [null];
                    } else {
                      // nin () is true
                      // nin : [null] is a world query which is an invalid filter. We don't support yet.
                      return [];
                    }
                  }
                  var list = [];
                  for (let j = 0, m = columnValue.length; j < m; j++) {
                    list.push(
                      assignbit(Rule.create({key : columnName, value : toColumnValue(p, columnValue[j]), operator : op})).then((rChild)=>{
                        connectRules(operators[rParent.operator].bit, rChild, rParent);
                        return rChild
                      })
                    );
                  }
                  fullResult.push.apply(fullResult, list);
                  return list
                }, immediateParentP);
                ruleset.push(rp);
                fullResult.push(rp);
              }
            } else if (operator === 'regexp' && expression instanceof RegExp) {
              // do not coerce RegExp based on property definitions
              
              var rpromise = assignbit(Rule.create({key : columnName, value : toColumnValue(p, expression), operator})).then((rChild)=>{
                if(immediateParentP) {
                  return immediateParentP.then((immediateParent)=> {
                    connectRules(operators[immediateParent.operator].bit, rChild, immediateParent);
                    return rChild   
                  })
                }
  
                // PB : TODO -- Unwrapped decendents update on parent!!!
                return rChild
              }).catch(e=>{ console.error('Regexp expression : ' + e); });

              fullResult.push(rpromise);          
              ruleset.push(rpromise);
              // columnValue = expression;
            } else {
              var rpromise = assignbit(Rule.create({key : columnName, value : toColumnValue(p, expression), operator})).then((rChild)=>{
                if(immediateParentP) {
                  return immediateParentP.then((immediateParent)=> {
                    connectRules(operators[immediateParent.operator].bit, rChild, immediateParent);
                    return rChild   
                  })
                }
  
                // PB : TODO -- Unwrapped decendents update on parent!!!
                return rChild
              }).catch(e=>{ console.error('other expression : ' + e); });
              fullResult.push(rpromise);          
              ruleset.push(rpromise);      

              // columnValue = toColumnValue(p, expression);
            }
            
          } else {

            if(utils_1.js.isArray(expression)) throw 'Invalid array value for filter. Implicit INQ not supported. '
            // ruleProcessor[EQ](); 
            
            var rpromise = assignbit(Rule.create({key : columnName, value : toColumnValue(p, expression), operator : EQ})).then((rChild)=>{
              if(immediateParentP) {
                return immediateParentP.then((immediateParent)=> {
                  connectRules(operators[immediateParent.operator].bit, rChild, immediateParent);
                  return rChild   
                })
              }

              // PB : TODO -- Unwrapped decendents update on parent!!!
              return rChild
            }).catch(e=>{ console.error('other expression : ' + e); });
            
            fullResult.push(rpromise);          
            ruleset.push(rpromise);
          }
        }

        return Promise.all(ruleset).then(()=>{

          if(immediateParentP){
            return immediateParentP;
          }
          if(ruleset.length > 1) {
            // If only 1 rule there is no point in having an outer implicit and.
            // If length is > 1 it implies there are a mixture of ands ors and raw rules specified as an outer object 
              // and we need to return the grouped rule.
  
            // var grpromise = Promise.all(ruleset).then( (list)=>{
            //   var grouped = Rule.create({ id, operator : AND }).assignbit();
            //   return grouped.then(r=>{
            //     r.list = list;
            //     return r
            //   })
            // });
            
            // fullResult.push(grpromise)          
            // return grpromise
            
            return ruleset[ruleset.length-1].then((r)=>{ r.id = id || r.id; return r});
          }
          else if(ruleset.length > 0) {
            return ruleset[0].then((r)=>{ r.id = id || r.id; return r});
          }
          else {
            return fullResult[fullResult.length-1].then((r)=>{ r.id = id || r.id; return r});
          }
        })
        
      }
      return Rule
    }
  };
  var createIntermediateParentLess = (interMediatGroupParent, createChildren)=>{
    var interMediatGroupParentP = assignbit(Rule.create(interMediatGroupParent)).then((rIntermediate)=>{
      return rIntermediate
    });
    
    var grpromise = interMediatGroupParentP.then((rParent)=>{
      
      // var rParent = resolved[1]
      // if(immediateParentP) {
      //   connectRules( operators[ resolved[0].operator].bit, rParent, resolved[0] ) 
      //   // PB : Note --  we connect right here and after children are properly created we update parent descendents when we unwrap to root parent.
      //   rParent.ancestors |= resolved[0].ancestors | resolved[0].bit // PB : TODO -- should ancestors be included in the mask ???
      // }

      // PB : TODO -- When we unwind descendents on ancestors need to be updated.
      // PB : TODO -- Why is this group not getting pushed into the full list.
        // Also what happens when caluse[i] is an array ? Does a group get created and also clause i ?
      return Promise.all(createChildren(rParent)).then( (list)=>{
        // PB : TODO -- We don't know yet whether id needs to be assigned to this rule 
        // or an outer grouped rule.
        rParent.list = list;
        return rParent
      });
    });
    return grpromise;
  };

  var createIntermediateWithParent = (interMediatGroupParent, createChildren, immediateParentP)=>{

    var interMediatGroupParentP = assignbit(Rule.create(interMediatGroupParent)).then((rIntermediate)=>{     
      return immediateParentP.then((immediateParent)=>{
        connectRules(operators[immediateParent.operator].bit, rIntermediate, immediateParent);
        return rIntermediate
      })
    });
    
    var grpromise = interMediatGroupParentP.then((rParent)=>{
      
      // var rParent = resolved[1]
      // if(immediateParentP) {
      //   connectRules( operators[ resolved[0].operator].bit, rParent, resolved[0] ) 
      //   // PB : Note --  we connect right here and after children are properly created we update parent descendents when we unwrap to root parent.
      //   rParent.ancestors |= resolved[0].ancestors | resolved[0].bit // PB : TODO -- should ancestors be included in the mask ???
      // }

      // PB : TODO -- When we unwind descendents on ancestors need to be updated.
      // PB : TODO -- Why is this group not getting pushed into the full list.
        // Also what happens when caluse[i] is an array ? Does a group get created and also clause i ?
      return Promise.all(createChildren(rParent)).then( (list)=>{
        // PB : TODO -- We don't know yet whether id needs to be assigned to this rule 
        // or an outer grouped rule.
        rParent.list = list;
        return rParent
      });
    });       
    return grpromise;
  };

  // Literals
  const EQ = 'eq';
  const LTE = 'lte';
  const GTE = 'gte';
  const LT = 'lt';
  const GT = 'gt';
  const AND = 'and';
  const OR = 'or';
  const INQ = 'inq';
  const BETWEEN = 'between';
  const NIN = 'nin';
  const NEQ = 'neq';
  __Rule.EQ = 1;
  __Rule.LTE = 2;
  __Rule.GTE = 4;
  __Rule.LT = 8;
  __Rule.GT = 16;
  __Rule.AND = 32;
  __Rule.OR = 64;

  var operators = {
      eq  : { operator : '=',  bit : __Rule.EQ}
    , lte : { operator : '<=', bit : __Rule.LTE}
    , gte : { operator : '>=', bit : __Rule.GTE}
    , lt  : { operator : '<',  bit : __Rule.LT}
    , gt  : { operator : '>',  bit : __Rule.GT}
    , and  : { operator : AND,  bit : __Rule.AND}
    , or  : { operator : OR,  bit : __Rule.OR}
  };

  var operatorsIndex = {};
  Object.keys(operators).forEach(op => operatorsIndex[operators[op].bit] = operators[op] );

  function __newInstance(o){
    var d = new Date();
    var id = o.id || uuidv1();
    return { v1ruleId : id, id, datecreated : d, datemodified : d
      , permissive : BIGINT_0, restrictive : BIGINT_0, descendents : BIGINT_0, ancestors : BIGINT_0, list :[] }
  }

  var globalBitIterator = bigIntBitGenerator();
  function assignbit(rule){ var g = globalBitIterator.next().value; rule.bit = g.bit; rule.ruleiId = g.iId;
    return Promise.resolve(rule); // PB : TODO -- remove backward compatible promisification...
  }
  // Find leaf rules from a set of rules ( in a database of rules ) that match the inputs
  function getParticipating(iRule, rList, cb){
    return Promise.all(iRule.results).then((iRules)=>{
      var SUCCESS = BIGINT_0;
      var FAILURE = BIGINT_0;
      var mask = BIGINT_0;
      var results = rList.filter(rule => {
        var found = iRules.find( iR => {
          if(iR.key && typeof(iR.key)=='string'){iR.key=iR.key.toUpperCase();}
          if(iR === rule || iR.id === rule.id || 
              iR.key === rule.key &&
              (   rule.operator == GT && (
                    rule.value <= iR.value && iR.operator == GT 
                  || rule.value < iR.value && ( iR.operator == GTE || iR.operator == EQ )
                ) 
                || rule.operator == GTE && ( 
                    rule.value <= iR.value && (iR.operator == GTE || iR.operator == EQ) 
                  || (iR.value - rule.value) >= 0 && iR.operator == GT
                )
                || rule.operator == LT && ( 
                    rule.value >= iR.value && iR.operator == LT 
                  || rule.value > iR.value && ( iR.operator == LTE || iR.operator == EQ )
                )
                || rule.operator == LTE && (
                    rule.value >= iR.value && (iR.operator == LTE || iR.operator == EQ) 
                  || (rule.value - iR.value) >= 0 && iR.operator == LT
                )
                || rule.operator == EQ && (
                    rule.value == iR.value && iR.operator == EQ
                ) 
              )
            ) {
            
            SUCCESS |= bufferToBigInt(rule.bit);
            mask |= bufferToBigInt(rule.mask);
            return true;
          }
        }); 
      
        if(!found) {
          if(rule.isleaf) { FAILURE |= rule.bit; }
          else {
            // Composite rule evaluation here is incomplete since we are still iterating and finding leaf level participants.
            // Optimistically computed in case we get lucky here on first pass for result caching efficiency.
            // No point in attempting a full evaluation for composite rule through parts as parts are still being evaluated.
            // A priority evaluation registration of leaf level descendents with a async postponed evaluation task for this rule...
            // may help with evaulation of relevant rules earlier....  
            // This specific rules full evaluation may be moot if no asserting participants can be found.
            // Or all its ancestral rules are already true without needing this rule to be evaluated.... 
            if(rule.permissive && rule.restrictive){
              if(rule.permissive & SUCCESS ) { SUCCESS |= rule.bit;  mask |= rule.mask; return true; }
              if(rule.restrictive & FAILURE) {FAILURE |= rule.bit; }
              if(rule.restrictive && (rule.restrictive & SUCCESS) === rule.restrictive) { SUCCESS |= rule.bit;  mask |= rule.mask; return true; }
              if(rule.permissive && (rule.permissive & FAILURE) === rule.permissive) {FAILURE |= rule.bit; }
            }
  
            // if((rule.descendents & SUCCESS) === rule.descendents) {
            //   // Implies all intermediate groups are true. We only need to examine direct leaf connections.
            //   SUCCESS |= rule.bit;
            //   mask |= rule.mask;
            // }
          }
        }
        
        return found;
      });
      
      if(utils_1.js.isFunction(arguments[arguments.length-1])) { return cb(null, { SUCCESS, FAILURE, mask, results} ) }
      else return { mask, list : found};
    });
  }

  function getParticipatingRoots(participating, rList, cb){
    var qualifiedRoots = [];
    rList.forEach((r)=>{
      if(r.isRoot && evaluate(r, participating)){ qualifiedRoots.push(r); }
    });
    cb(null, qualifiedRoots);
  }

  function toColumnValue(p, v) { return v; }
  function columnEscaped(inst, p) { return p; }

  function getsql_cond_group(){
    if(!this.list) { console.warn(`${this.operator} condition without list is moot`); return ''}
    if(this.list.length < 2) { 
      this.list.push( this.list[0] );  // PB : TOOD -- We are adding instead of eliminating Redundant groups ... 
    }
    var slqexprs = [];
    this.list.forEach(r => slqexprs.push(r.sql) );
    return '( ' + slqexprs.join( ` ${this.operator} `) + ' )'
  }

  function getfilter_cond_group(){
    if(!this.list) { console.warn(`${this.operator} condition without list is moot`); return ''}
    if(this.list.length < 2) { 
      this.list.push( this.list[0] );  // PB : TOOD -- We are adding instead of eliminating Redundant groups ... 
    }
    var filterexprs = [];
    this.list.forEach(r => filterexprs.push(r.filter) );
    return filterexprs;
  }
  



  // PB : TODO -- This might be easier done in a stored procedure.
  // It will also help if participating is not the whole list but the filtered list relevant for this rule.
  // Relocation so inline functions don't need to be redefined again and again.
  // Implement __Rule.isRoot 
  var evaluate = function(rule, participating){

    if(rule.bit & participating.SUCCESS ) return true;
    if(rule.bit & participating.FAILURE) return false 
    if(rule.permissive & participating.SUCCESS ) { participating.SUCCESS |= rule.bit;  return true }
    if(rule.restrictive & participating.FAILURE) {participating.FAILURE |= rule.bit; return false;}
    if(rule.restrictive && (rule.restrictive & participating.SUCCESS) === rule.restrictive) { participating.SUCCESS |= rule.bit;  return true }
    if(rule.permissive && (rule.permissive & participating.FAILURE) === rule.permissive) {participating.FAILURE |= rule.bit; return false;}
 
    // PB : TODO -- Truth value of grouped could be driven from the roots so we can limit to those rules that are relevant and avoid evaluation of each one.

    if(rule.isleaf) {
      if(participating.results.find( pp => pp === rule )) { participating.SUCCESS |= rule.bit; return true }
      else { participating.FAILURE |= rule.bit; return false; }
    }
    // else {
    //  // If descendents are true we can extract only the ones that are direct connections and 
    //  //  Evaluate...
    //   var alldescendentsAreTrue = false;
    //   if((rule.descendents & participating.SUCCESS) === rule.descendents) {
    //     // Implies all intermediate groups are true. We only need to examine direct leaf connections.
    //     alldescendentsAreTrue = true;
    //   }
    // }

    // getUnevaluated
    var permissive = rule.permissive & (BigInt(-1)-participating.SUCCESS) & (BigInt(-1)-participating.FAILURE);
    for(var rc in rule.list){
      var r = rule.list[rc];
      if(r.bit & permissive) {
        if(evaluate(r, participating)) { participating.SUCCESS |= r.bit; participating.SUCCESS |= rule.bit; return true }
        else participating.FAILURE |= r.bit; 
      }
    }
    if(rule.permissive){ participating.FAILURE |= rule.bit; return false; }

    // getUnevaluated.
    var restrictive = rule.restrictive & (BigInt(-1)-participating.SUCCESS) & (BigInt(-1)-participating.FAILURE);
    for(var rc in rule.list){
      var r = rule.list[rc];
      if(r.bit & restrictive) {
        if(!evaluate(r, participating)) { participating.FAILURE |= r.bit; participating.FAILURE |= rule.bit; return false}
        participating.SUCCESS |= r.bit;
      }
    }
    if(rule.restrictive){ participating.SUCCESS |= rule.bit; return true; }
    
    throw 'Error : A group rule should either be permissive or restrictive...'
    
  };

  var match = function (inputs, rList, cb) {
    var results = [];
    if (typeof(clause)==undefined){var clause=null;}
    Rule.build(inputs, clause, results).then((inputRule)=>{
      inputRule.results = results;
      // inputs are usually individual assertions. An and / or condition between individual assertions are usually not useful.
        // Unless the assertion is of the form 
          // Eg : this indiviudal's age is between x and y which is kind of rare.
        // A negation is also not how an assertion is typically made. However not from location C or D is a possible assertion.
        // An or assertion is still more rare and is usually an abstraction to not be specific.
          // Eg : The user is from location A or B and uses either a Mac or Ubuntu OS.
            // Although the user has specific characteristics the specificity is not disclosed in the inputs.
            // And is adequate to distinguish the inputs from amongst a superset.
            // In the above example the user cannot be from both locations A and B at the same time but could be using both Mac and Ubuntu probably even at the same time.
      // 1) The simplest and fastest use case is exact matches of input assertions with and exact match of saved rules.
      // 2) exact input values with condition groups in the rules is also supportable.
      // 3) complex input rules as abstract or range assertions matching 
              // complex rules that have range or absctract conditions -- How to Implement ??
      // IMPLEMENTATION AS SQL
        // FIND PARTICIPATING rules that evaluate true.
        /* WHERE rule.key = input.key ( rule.operator = '>' AND rule.value <= input.value AND input.operator = '>' 
           OR rule.operator = '>' AND rule.value < input.value AND input.operator = '>=' 
           OR rule.operator = '>=' AND rule.value <= input.value AND (input.operator = '>=' OR input.operator = '=') 
         ) AND 
         ( rule.operator = '<' AND rule.value <= input.value AND input.operator = '<' 
           OR rule.operator = '<' AND rule.value < input.value AND input.operator = '<=' 
           OR rule.operator = '<=' AND rule.value <= input.value AND (input.operator = '<=' OR input.operator = '=') 
         )
        */ 
        // QUALIFY ALL ( GROUPED and LEAF ) RULES that evaluate true using the assertions from the participating rules.
        /*
          LEFT JOIN rule
          WHERE participating.bit = (participating.bit & rule.mask) 
            -- and rule.operator = 'or'
            -- or rule.mask = (allparticipating.mask & rule.mask ) and rule.operator = 'and'
         */
        /* USE THE QUALIFED RULES TO EVALUEATE RESULTS for GROUP LEVELS and ROOT RULES.
          Any grouped rule is associated with 3 kinds evaluation sets composed of rules that are either leaf 
            level rules directly or through other promoted grouped rules or groups.
          Evaluation Sets.
            Permissive rules, Restrictive rules, Indeterminant rules
          1) Permissive bits turn the whole group to true if any one is true. 
            Irrespective of all the other participating leaf rules.
            It is therefore not required to evaluate any other types of leaf rules.
          2) Restrictive rules turn the whole group to false if any one is false. 
            If there are no permissive rules it then becomes relevant to evaluate the restrictive rules.
            Other Indeterminant rule evaluation is therefore not relevant.
          3) Indeterminant rules need to be evaluated at run time.
              -- Are typically unevaluated nested groups
              -- Or can be Individual Evaluated results 
                  which don't yet determine the overall result and mean anything 
                  until a complex hierarchy of conditions 
                  are evaluated and collectively satisifed.
  
          -- Since we do not (yet) support rule negations 
            -- it necessarily implies that if all of the Indeterminant set items are true then the whole group is true.
            -- which then implies we can bypass the Indeterminant group and subgroup structure evaluation for efficiency.
  
          -- Pre-Evaluated promotion to parent group evaluation sets to parent groups evaluation sets.
              Composition of a subgroup can be promoted directly into the parent groups evaluation sets when certain conditions are met.
  
            When There are no Permissive rules
            AND ( There are no restrictive rules OR all the restrictive rules are true )
              Then evaluation of the descendents rule set is required until we reach all leaf level nodes.
              Subgroups are recursively evaluated using these same 3 steps. 
              
            Following caching efficiencies can be precomputed and stored with the parents rule sets as rule promotions.
              If the sub group rule participates in parents permissive set.
                All of its permissive rules should be added to the parent groups permissive set.
                  -- The sub group has no restrictive and descendents sets sub group bit need not be in the parents permissive set.
                If subgroup has restricitve sets and no descendents sets
                  -- and is a subset of the parent groups restrictive set 
                    -- then subgroup bit can be removed from parents permissive and restrictive groups.
                      -- This is good for preventing re-evaluation of the sub group for efficiency.
                  -- else subgroup bit should be present in the permissive 
                Sub group has descendents sets
                  -- the sub group bit must necessarily be added to the parents permissive set.
              
              If the sub group rule participates in the parents restrictive set
                - Sub Group is Pure Permissive = Has no restrictive set or descendents set
                  Runtime Evaluate.
  
                - Sub Group is Pure Restrictive = Has no permissive or descendents set
                  -- Restrictive set of sub group should be promoted into the restrictive set of the parent
                  -- sub group bit should be removed from all parent sets for effciency by bypassing subgroup evaluation.
            
                - All other cases Runtime Evaluate.
              
              Sub Group participates in descendents set.
                -- Run time evaluation.
        */
  
        getParticipating(inputRule, rList, (err, participating)=>{
          getParticipatingRoots(participating, rList, (err, participatingRoots)=>{
            cb(null, participatingRoots);
          });
        });
    });
  };

  // PB : TODO --  Creations are easy. Edits and updates for addition of a single rule are expensive due to cascading updates to all relations.
  // Connections can be made in multiple dimensions. For Rules we currlently only implement the child and parent dimensions.
  // PB : TODO -ve dimensions ?? In this implementation there are no negative dimensions...
    // So both -ve and +ve dimensions are independent. But can be marked as opposites.
  // Note : Therefore Child and Parent are different independent dimensions. 
  // They may not be exactly oposing in this case ( Rules are networks ) and some circular loops may exist. 
  var connectRules = function(as, ...rest){ return branch[as](...rest)  };

  var branch = {};
  branch[__Rule.AND] = function(rChild, rParent, refresh){
    rChild.ancestors |= rParent.ancestors | rParent.bit; // This should set the whole ancestral network. 
    
    if(rParent.permissive || rParent.operator === OR) throw 'Error Invalid rule addition to parent'

    if(rParent.restrictive & rChild.bit) return; // Was already connected within this and.
    rParent.list.push(rChild);
    
    // if(!rParent.permissive && !rParent.restrictive) {
    //   if(rParent.operator !== AND && rParent.operator !== OR) { 
    //     if(!rParent.operator) rParent.operator = AND; // Implicit AND if unspeicified
    //     else throw 'Incomplete parent. Invalid operator or no operator specified.'
    //   }
    //   rParent.operator === AND ?  rParent.restrictive |= rChild.bit : rParent.permissive |= rChild.bit ; 
    // }
    
    // Promotions : All child rules are only a bunch of Ands or ors 
    // they can be flattened directly into the containing rule.
    // if(!rParent.permissive) { rParent.restrictive |= rChild.restrictive; rParent.restrictive |= rChild.bit; }
    // if(!rParent.restrictive) { rParent.permissive |= rChild.permissive; rParent.permissive |= rChild.bit; }
    rParent.restrictive |= rChild.restrictive | rChild.bit;

    // Descendents should be all non immediate descendents.
    // Immmediate descendents can always be computed as (r.permissive | r.restrictive) & !r.descendents
    // child may be either permissive or restrictive. Since child.restrictive is already added in. 
    rParent.descendents |= rChild.descendents | rChild.permissive | rChild.restrictive ;

    // If we add another ancestral network to one of the ancestors we need to cascaded it down to the child network. 
    // and vice versa.
    if(refresh){
      // PB : TODO -- Cascading refreshes should avoid circular loops..
      rChild.refreshDescendents(rChild.ancestors);
      rParent.refreshAncestors(rParent.descendents);
    }
  };

  branch[__Rule.OR] = function(rChild, rParent, refresh){
    rChild.ancestors |= rParent.ancestors | rParent.bit; 

    if(rParent.restrictive || rParent.operator !== OR) throw 'Error Invalid rule addition to parent'
    if(rParent.permissive & rChild.bit) return
    rParent.list.push(rChild);

    rParent.permissive |= rChild.permissive | rChild.bit;

    rParent.descendents |= rChild.descendents | rChild.permissive | rChild.restrictive ;
    if(refresh){
      rChild.refreshDescendents(rChild.ancestors); // This should set the whole ancestral network. 
      rParent.refreshAncestors(rParent.descendents);
    }
  };
  
  var rProto = { migrationstate : 8, operator : EQ
    , evaluate // PB : TODO -- Enforce preconditions for evaluate on instance. Eg. Assignbit is a precondition for evaluate or match.
    , connect : function(parent){
      connectRules(operators[parent.operator].bit, this, parent);
    }
    // PB : TODO -- Cloning descriptors using assgin is expense. Review and just atttach to each new instance...
    , get sql(){ 
      var getSql = this.operator === AND ? getsql_cond_group : this.operator === OR ? getsql_cond_group
         : ()=>this.key + ' ' + operators[this.operator].operator + 
          (Object.prototype.toString.call(this.value) === '[object Date]' ? ` '${this.value.toISOString()}' ` :` '${this.value}' `);
       return getSql.call(this)
    }
    , get filter(){
      var getFilter = this.operator === AND ? getfilter_cond_group : this.operator === OR ? getfilter_cond_group
        : ()=>{
          var f = {};
          f[this.key] = {};
          f[this.key][this.operator] = this.value; return f;};
      return getFilter.call(this)
    }
    // PB : TODO -- this.siblings will be a nice addition.
    , get mask(){ return this.permissive | this.restrictive | this.descendents | this.ancestors | this.bit }
    , get isIndependent() { return (!this.mask || (this.bit === this.mask))  }
    , get isRoot() { return !this.ancestors }
    , get isChild() { return this.ancestors }
    , get isParent() { return (this.permissive | this.restrictive | this.descendents) }
    , get isleaf() { return  !this.bit || !(this.permissive | this.restrictive | this.descendents) }
    , get iscomposite() { return this.list.length > 1 } // PB : TODO -- Non composite parents may be possible to collapse
  };

  return _Rule.extend()
})();

utils_1.core = core_1;
var bbhverse = utils_1;

const { spawn: spawn$1, spawnSync } = childProcess__default['default'];


function nodeShellExec$1() {

    var args = Array.from(arguments);
    var opts = args[2] = args[2] || {};
    opts.title ? null : opts.title = `${args[0]} ${args[1]  }`;
    
    // // const spawn = require('child_process').spawn;
    // const s = spawn(
    //     'C:\\Program Files\\Git\\bin\\sh.exe'
    // , ['notepad', 'index'], { cwd: __dirname });



    // var interval = null;
    // var t = setTimeout(function(){
    //   interval = setInterval(function(){
      
    //     console.log('Awaiting close : ' + child.spawnargs)
  
    //   }, 1500)
    //   // console.log('Awaiting close : ' + child.spawnargs)

    // }, 0)

    // child.on('close', (code) => {
    //   console.error('Prematurely closed even before promise...')
    // })
    // D:\chess\instances\elixir_01\elxr/.elxr/run-1630002739610/download.bat https://github.com/git-for-windows/git/releases/download/v2.33.0.windows.2/Git-2.33.0.2-64-bit.exe D:\\chess\\instances\\elixir_01\\elxr/Downloads/Git-2.33.0.2-64-bit.exe
    // D:\\chess\\instances\\elixir_01\\elxr/.elxr/run-1630002923584/download.bat https://github.com/git-for-windows/git/releases/download/v2.33.0.windows.2/Git-2.33.0.2-64-bit.exe D:\\chess\\instances\\elixir_01\\elxr/Downloads/Git-2.33.0.2-64-bit.exe
  
    var p = new Promise(function(resolve, reject){
      // console.log(...args)
      const child = spawn$1(...args);
      if(!opts.detached) {
        var messages = []; // PB : TODO -- Explore stream for Task level  aggregation to prevent interleaved messages from multiple tasks...
        var success = true;
        
        if(opts.stdio !== 'ignore') {
          child.stdout.setEncoding('utf8');
          child.stderr.setEncoding('utf8');
          child.stdout.on('data', (chunk) => { 
            chunk.trim() === '' ? null : messages.push(chunk); /* console.log('d: ' + chunk) */ 
            process.stdout.write( chunk );
          });
          child.on('error', (chunk) => { success = false; messages.push(chunk); /* console.error('e: ' + chunk) */ 
            console.log('Error exit not handled.');
          }  );
          child.stderr.on('data', (chunk) => { 
            if(messages.join('').indexOf('fatal: not a git repository') > -1) opts.haserrors = true; 
            messages.push(chunk); 
            // process.stdout.write( chunk )
            // console.error('stderr e: ' + chunk)
          });
        }
        child.on('close', (code) => {
          // console.log('Proper close was fired')
          var logEntry = { code, success };
          if(+code !== 0 || opts.haserrors) { success = false; logEntry = { messages, result: `${opts.title} exited with code ${code}`, success, code };
            if(opts.evaluateResult) logEntry = opts.evaluateResult(false, logEntry);
          }          if(opts.stdio !== 'ignore') {
            logEntry = { result: `${opts.title} exited with code ${code}`, messages,  code };
            logEntry.success = success;
            if(opts.evaluateResult) logEntry = opts.evaluateResult(success, logEntry);
            if(opts.runas){
              // success ? logEntry.success = true : null;
              fs__default['default'].writeFileSync('run.log', ', ' + JSON.stringify(logEntry), {'flag':'a+'} );
            }
            else {
              // console.log( messages.join('') )
              process.stdout.write( messages.join('') );
            }
          }
          // clearInterval(interval)
          if(code !== 0 || opts.haserrors) return reject(logEntry)
          resolve(logEntry);
        });
      }
      else {
        child.unref();
        // clearInterval(interval)
        resolve(true);
      }
    });
    // p.process = child; 
    return p;
}

var prompt = function(choices, label, defaultchoice){
  // prompt accepts either an array or an object as choices.
  var choices = choices || [];
  defaultchoice = defaultchoice || choices[0] || choices[Object.keys(choices)[0]];
  return this.prompter.ask(
      `${label} \n` + Object.keys(choices).map(choice => { var choice_label = isNaN(+choice) ? choice : ((+choice) + 1); return `  ${choice_label}) ${choices[choice]} `}).join('\n') + `\n  default ( <= ${ defaultchoice || choices[0]} ) : `
    ).then(choice => {
      // propName = promptable.interpret(propValue)
      if(!choice) return defaultchoice || choices[0];
      if(choice && isNaN(+choice)) return choice;
      return choices[(+choice) - 1];
    })
}; 


var cli = {
    nodeShellExec: nodeShellExec$1
  , get prompter() {
    var prompt_interface = { 
      ask : function(q){
        // Needs to be serialized. Parallel asks are not possible.
        const clii = readline__default['default'].createInterface({ input: process.stdin, output: process.stdout });
        return new Promise((resolve, reject)=>{
          clii.question(q, (answer)=>{ 
            try {
              clii.close();
              console.log("readline.createInterface closed");
              resolve(answer); 
            }
            catch(e) {
              reject(e);
            }
          });
        })
      }
    };
    return prompt_interface
  }
  , prompt
};

var cliverse = cli;

var colorName = {
	"aliceblue": [240, 248, 255],
	"antiquewhite": [250, 235, 215],
	"aqua": [0, 255, 255],
	"aquamarine": [127, 255, 212],
	"azure": [240, 255, 255],
	"beige": [245, 245, 220],
	"bisque": [255, 228, 196],
	"black": [0, 0, 0],
	"blanchedalmond": [255, 235, 205],
	"blue": [0, 0, 255],
	"blueviolet": [138, 43, 226],
	"brown": [165, 42, 42],
	"burlywood": [222, 184, 135],
	"cadetblue": [95, 158, 160],
	"chartreuse": [127, 255, 0],
	"chocolate": [210, 105, 30],
	"coral": [255, 127, 80],
	"cornflowerblue": [100, 149, 237],
	"cornsilk": [255, 248, 220],
	"crimson": [220, 20, 60],
	"cyan": [0, 255, 255],
	"darkblue": [0, 0, 139],
	"darkcyan": [0, 139, 139],
	"darkgoldenrod": [184, 134, 11],
	"darkgray": [169, 169, 169],
	"darkgreen": [0, 100, 0],
	"darkgrey": [169, 169, 169],
	"darkkhaki": [189, 183, 107],
	"darkmagenta": [139, 0, 139],
	"darkolivegreen": [85, 107, 47],
	"darkorange": [255, 140, 0],
	"darkorchid": [153, 50, 204],
	"darkred": [139, 0, 0],
	"darksalmon": [233, 150, 122],
	"darkseagreen": [143, 188, 143],
	"darkslateblue": [72, 61, 139],
	"darkslategray": [47, 79, 79],
	"darkslategrey": [47, 79, 79],
	"darkturquoise": [0, 206, 209],
	"darkviolet": [148, 0, 211],
	"deeppink": [255, 20, 147],
	"deepskyblue": [0, 191, 255],
	"dimgray": [105, 105, 105],
	"dimgrey": [105, 105, 105],
	"dodgerblue": [30, 144, 255],
	"firebrick": [178, 34, 34],
	"floralwhite": [255, 250, 240],
	"forestgreen": [34, 139, 34],
	"fuchsia": [255, 0, 255],
	"gainsboro": [220, 220, 220],
	"ghostwhite": [248, 248, 255],
	"gold": [255, 215, 0],
	"goldenrod": [218, 165, 32],
	"gray": [128, 128, 128],
	"green": [0, 128, 0],
	"greenyellow": [173, 255, 47],
	"grey": [128, 128, 128],
	"honeydew": [240, 255, 240],
	"hotpink": [255, 105, 180],
	"indianred": [205, 92, 92],
	"indigo": [75, 0, 130],
	"ivory": [255, 255, 240],
	"khaki": [240, 230, 140],
	"lavender": [230, 230, 250],
	"lavenderblush": [255, 240, 245],
	"lawngreen": [124, 252, 0],
	"lemonchiffon": [255, 250, 205],
	"lightblue": [173, 216, 230],
	"lightcoral": [240, 128, 128],
	"lightcyan": [224, 255, 255],
	"lightgoldenrodyellow": [250, 250, 210],
	"lightgray": [211, 211, 211],
	"lightgreen": [144, 238, 144],
	"lightgrey": [211, 211, 211],
	"lightpink": [255, 182, 193],
	"lightsalmon": [255, 160, 122],
	"lightseagreen": [32, 178, 170],
	"lightskyblue": [135, 206, 250],
	"lightslategray": [119, 136, 153],
	"lightslategrey": [119, 136, 153],
	"lightsteelblue": [176, 196, 222],
	"lightyellow": [255, 255, 224],
	"lime": [0, 255, 0],
	"limegreen": [50, 205, 50],
	"linen": [250, 240, 230],
	"magenta": [255, 0, 255],
	"maroon": [128, 0, 0],
	"mediumaquamarine": [102, 205, 170],
	"mediumblue": [0, 0, 205],
	"mediumorchid": [186, 85, 211],
	"mediumpurple": [147, 112, 219],
	"mediumseagreen": [60, 179, 113],
	"mediumslateblue": [123, 104, 238],
	"mediumspringgreen": [0, 250, 154],
	"mediumturquoise": [72, 209, 204],
	"mediumvioletred": [199, 21, 133],
	"midnightblue": [25, 25, 112],
	"mintcream": [245, 255, 250],
	"mistyrose": [255, 228, 225],
	"moccasin": [255, 228, 181],
	"navajowhite": [255, 222, 173],
	"navy": [0, 0, 128],
	"oldlace": [253, 245, 230],
	"olive": [128, 128, 0],
	"olivedrab": [107, 142, 35],
	"orange": [255, 165, 0],
	"orangered": [255, 69, 0],
	"orchid": [218, 112, 214],
	"palegoldenrod": [238, 232, 170],
	"palegreen": [152, 251, 152],
	"paleturquoise": [175, 238, 238],
	"palevioletred": [219, 112, 147],
	"papayawhip": [255, 239, 213],
	"peachpuff": [255, 218, 185],
	"peru": [205, 133, 63],
	"pink": [255, 192, 203],
	"plum": [221, 160, 221],
	"powderblue": [176, 224, 230],
	"purple": [128, 0, 128],
	"rebeccapurple": [102, 51, 153],
	"red": [255, 0, 0],
	"rosybrown": [188, 143, 143],
	"royalblue": [65, 105, 225],
	"saddlebrown": [139, 69, 19],
	"salmon": [250, 128, 114],
	"sandybrown": [244, 164, 96],
	"seagreen": [46, 139, 87],
	"seashell": [255, 245, 238],
	"sienna": [160, 82, 45],
	"silver": [192, 192, 192],
	"skyblue": [135, 206, 235],
	"slateblue": [106, 90, 205],
	"slategray": [112, 128, 144],
	"slategrey": [112, 128, 144],
	"snow": [255, 250, 250],
	"springgreen": [0, 255, 127],
	"steelblue": [70, 130, 180],
	"tan": [210, 180, 140],
	"teal": [0, 128, 128],
	"thistle": [216, 191, 216],
	"tomato": [255, 99, 71],
	"turquoise": [64, 224, 208],
	"violet": [238, 130, 238],
	"wheat": [245, 222, 179],
	"white": [255, 255, 255],
	"whitesmoke": [245, 245, 245],
	"yellow": [255, 255, 0],
	"yellowgreen": [154, 205, 50]
};

/* MIT license */

/* eslint-disable no-mixed-operators */


// NOTE: conversions should only return primitive values (i.e. arrays, or
//       values that give correct `typeof` results).
//       do not use box values types (i.e. Number(), String(), etc.)

const reverseKeywords = {};
for (const key of Object.keys(colorName)) {
	reverseKeywords[colorName[key]] = key;
}

const convert$1 = {
	rgb: {channels: 3, labels: 'rgb'},
	hsl: {channels: 3, labels: 'hsl'},
	hsv: {channels: 3, labels: 'hsv'},
	hwb: {channels: 3, labels: 'hwb'},
	cmyk: {channels: 4, labels: 'cmyk'},
	xyz: {channels: 3, labels: 'xyz'},
	lab: {channels: 3, labels: 'lab'},
	lch: {channels: 3, labels: 'lch'},
	hex: {channels: 1, labels: ['hex']},
	keyword: {channels: 1, labels: ['keyword']},
	ansi16: {channels: 1, labels: ['ansi16']},
	ansi256: {channels: 1, labels: ['ansi256']},
	hcg: {channels: 3, labels: ['h', 'c', 'g']},
	apple: {channels: 3, labels: ['r16', 'g16', 'b16']},
	gray: {channels: 1, labels: ['gray']}
};

var conversions = convert$1;

// Hide .channels and .labels properties
for (const model of Object.keys(convert$1)) {
	if (!('channels' in convert$1[model])) {
		throw new Error('missing channels property: ' + model);
	}

	if (!('labels' in convert$1[model])) {
		throw new Error('missing channel labels property: ' + model);
	}

	if (convert$1[model].labels.length !== convert$1[model].channels) {
		throw new Error('channel and label counts mismatch: ' + model);
	}

	const {channels, labels} = convert$1[model];
	delete convert$1[model].channels;
	delete convert$1[model].labels;
	Object.defineProperty(convert$1[model], 'channels', {value: channels});
	Object.defineProperty(convert$1[model], 'labels', {value: labels});
}

convert$1.rgb.hsl = function (rgb) {
	const r = rgb[0] / 255;
	const g = rgb[1] / 255;
	const b = rgb[2] / 255;
	const min = Math.min(r, g, b);
	const max = Math.max(r, g, b);
	const delta = max - min;
	let h;
	let s;

	if (max === min) {
		h = 0;
	} else if (r === max) {
		h = (g - b) / delta;
	} else if (g === max) {
		h = 2 + (b - r) / delta;
	} else if (b === max) {
		h = 4 + (r - g) / delta;
	}

	h = Math.min(h * 60, 360);

	if (h < 0) {
		h += 360;
	}

	const l = (min + max) / 2;

	if (max === min) {
		s = 0;
	} else if (l <= 0.5) {
		s = delta / (max + min);
	} else {
		s = delta / (2 - max - min);
	}

	return [h, s * 100, l * 100];
};

convert$1.rgb.hsv = function (rgb) {
	let rdif;
	let gdif;
	let bdif;
	let h;
	let s;

	const r = rgb[0] / 255;
	const g = rgb[1] / 255;
	const b = rgb[2] / 255;
	const v = Math.max(r, g, b);
	const diff = v - Math.min(r, g, b);
	const diffc = function (c) {
		return (v - c) / 6 / diff + 1 / 2;
	};

	if (diff === 0) {
		h = 0;
		s = 0;
	} else {
		s = diff / v;
		rdif = diffc(r);
		gdif = diffc(g);
		bdif = diffc(b);

		if (r === v) {
			h = bdif - gdif;
		} else if (g === v) {
			h = (1 / 3) + rdif - bdif;
		} else if (b === v) {
			h = (2 / 3) + gdif - rdif;
		}

		if (h < 0) {
			h += 1;
		} else if (h > 1) {
			h -= 1;
		}
	}

	return [
		h * 360,
		s * 100,
		v * 100
	];
};

convert$1.rgb.hwb = function (rgb) {
	const r = rgb[0];
	const g = rgb[1];
	let b = rgb[2];
	const h = convert$1.rgb.hsl(rgb)[0];
	const w = 1 / 255 * Math.min(r, Math.min(g, b));

	b = 1 - 1 / 255 * Math.max(r, Math.max(g, b));

	return [h, w * 100, b * 100];
};

convert$1.rgb.cmyk = function (rgb) {
	const r = rgb[0] / 255;
	const g = rgb[1] / 255;
	const b = rgb[2] / 255;

	const k = Math.min(1 - r, 1 - g, 1 - b);
	const c = (1 - r - k) / (1 - k) || 0;
	const m = (1 - g - k) / (1 - k) || 0;
	const y = (1 - b - k) / (1 - k) || 0;

	return [c * 100, m * 100, y * 100, k * 100];
};

function comparativeDistance(x, y) {
	/*
		See https://en.m.wikipedia.org/wiki/Euclidean_distance#Squared_Euclidean_distance
	*/
	return (
		((x[0] - y[0]) ** 2) +
		((x[1] - y[1]) ** 2) +
		((x[2] - y[2]) ** 2)
	);
}

convert$1.rgb.keyword = function (rgb) {
	const reversed = reverseKeywords[rgb];
	if (reversed) {
		return reversed;
	}

	let currentClosestDistance = Infinity;
	let currentClosestKeyword;

	for (const keyword of Object.keys(colorName)) {
		const value = colorName[keyword];

		// Compute comparative distance
		const distance = comparativeDistance(rgb, value);

		// Check if its less, if so set as closest
		if (distance < currentClosestDistance) {
			currentClosestDistance = distance;
			currentClosestKeyword = keyword;
		}
	}

	return currentClosestKeyword;
};

convert$1.keyword.rgb = function (keyword) {
	return colorName[keyword];
};

convert$1.rgb.xyz = function (rgb) {
	let r = rgb[0] / 255;
	let g = rgb[1] / 255;
	let b = rgb[2] / 255;

	// Assume sRGB
	r = r > 0.04045 ? (((r + 0.055) / 1.055) ** 2.4) : (r / 12.92);
	g = g > 0.04045 ? (((g + 0.055) / 1.055) ** 2.4) : (g / 12.92);
	b = b > 0.04045 ? (((b + 0.055) / 1.055) ** 2.4) : (b / 12.92);

	const x = (r * 0.4124) + (g * 0.3576) + (b * 0.1805);
	const y = (r * 0.2126) + (g * 0.7152) + (b * 0.0722);
	const z = (r * 0.0193) + (g * 0.1192) + (b * 0.9505);

	return [x * 100, y * 100, z * 100];
};

convert$1.rgb.lab = function (rgb) {
	const xyz = convert$1.rgb.xyz(rgb);
	let x = xyz[0];
	let y = xyz[1];
	let z = xyz[2];

	x /= 95.047;
	y /= 100;
	z /= 108.883;

	x = x > 0.008856 ? (x ** (1 / 3)) : (7.787 * x) + (16 / 116);
	y = y > 0.008856 ? (y ** (1 / 3)) : (7.787 * y) + (16 / 116);
	z = z > 0.008856 ? (z ** (1 / 3)) : (7.787 * z) + (16 / 116);

	const l = (116 * y) - 16;
	const a = 500 * (x - y);
	const b = 200 * (y - z);

	return [l, a, b];
};

convert$1.hsl.rgb = function (hsl) {
	const h = hsl[0] / 360;
	const s = hsl[1] / 100;
	const l = hsl[2] / 100;
	let t2;
	let t3;
	let val;

	if (s === 0) {
		val = l * 255;
		return [val, val, val];
	}

	if (l < 0.5) {
		t2 = l * (1 + s);
	} else {
		t2 = l + s - l * s;
	}

	const t1 = 2 * l - t2;

	const rgb = [0, 0, 0];
	for (let i = 0; i < 3; i++) {
		t3 = h + 1 / 3 * -(i - 1);
		if (t3 < 0) {
			t3++;
		}

		if (t3 > 1) {
			t3--;
		}

		if (6 * t3 < 1) {
			val = t1 + (t2 - t1) * 6 * t3;
		} else if (2 * t3 < 1) {
			val = t2;
		} else if (3 * t3 < 2) {
			val = t1 + (t2 - t1) * (2 / 3 - t3) * 6;
		} else {
			val = t1;
		}

		rgb[i] = val * 255;
	}

	return rgb;
};

convert$1.hsl.hsv = function (hsl) {
	const h = hsl[0];
	let s = hsl[1] / 100;
	let l = hsl[2] / 100;
	let smin = s;
	const lmin = Math.max(l, 0.01);

	l *= 2;
	s *= (l <= 1) ? l : 2 - l;
	smin *= lmin <= 1 ? lmin : 2 - lmin;
	const v = (l + s) / 2;
	const sv = l === 0 ? (2 * smin) / (lmin + smin) : (2 * s) / (l + s);

	return [h, sv * 100, v * 100];
};

convert$1.hsv.rgb = function (hsv) {
	const h = hsv[0] / 60;
	const s = hsv[1] / 100;
	let v = hsv[2] / 100;
	const hi = Math.floor(h) % 6;

	const f = h - Math.floor(h);
	const p = 255 * v * (1 - s);
	const q = 255 * v * (1 - (s * f));
	const t = 255 * v * (1 - (s * (1 - f)));
	v *= 255;

	switch (hi) {
		case 0:
			return [v, t, p];
		case 1:
			return [q, v, p];
		case 2:
			return [p, v, t];
		case 3:
			return [p, q, v];
		case 4:
			return [t, p, v];
		case 5:
			return [v, p, q];
	}
};

convert$1.hsv.hsl = function (hsv) {
	const h = hsv[0];
	const s = hsv[1] / 100;
	const v = hsv[2] / 100;
	const vmin = Math.max(v, 0.01);
	let sl;
	let l;

	l = (2 - s) * v;
	const lmin = (2 - s) * vmin;
	sl = s * vmin;
	sl /= (lmin <= 1) ? lmin : 2 - lmin;
	sl = sl || 0;
	l /= 2;

	return [h, sl * 100, l * 100];
};

// http://dev.w3.org/csswg/css-color/#hwb-to-rgb
convert$1.hwb.rgb = function (hwb) {
	const h = hwb[0] / 360;
	let wh = hwb[1] / 100;
	let bl = hwb[2] / 100;
	const ratio = wh + bl;
	let f;

	// Wh + bl cant be > 1
	if (ratio > 1) {
		wh /= ratio;
		bl /= ratio;
	}

	const i = Math.floor(6 * h);
	const v = 1 - bl;
	f = 6 * h - i;

	if ((i & 0x01) !== 0) {
		f = 1 - f;
	}

	const n = wh + f * (v - wh); // Linear interpolation

	let r;
	let g;
	let b;
	/* eslint-disable max-statements-per-line,no-multi-spaces */
	switch (i) {
		default:
		case 6:
		case 0: r = v;  g = n;  b = wh; break;
		case 1: r = n;  g = v;  b = wh; break;
		case 2: r = wh; g = v;  b = n; break;
		case 3: r = wh; g = n;  b = v; break;
		case 4: r = n;  g = wh; b = v; break;
		case 5: r = v;  g = wh; b = n; break;
	}
	/* eslint-enable max-statements-per-line,no-multi-spaces */

	return [r * 255, g * 255, b * 255];
};

convert$1.cmyk.rgb = function (cmyk) {
	const c = cmyk[0] / 100;
	const m = cmyk[1] / 100;
	const y = cmyk[2] / 100;
	const k = cmyk[3] / 100;

	const r = 1 - Math.min(1, c * (1 - k) + k);
	const g = 1 - Math.min(1, m * (1 - k) + k);
	const b = 1 - Math.min(1, y * (1 - k) + k);

	return [r * 255, g * 255, b * 255];
};

convert$1.xyz.rgb = function (xyz) {
	const x = xyz[0] / 100;
	const y = xyz[1] / 100;
	const z = xyz[2] / 100;
	let r;
	let g;
	let b;

	r = (x * 3.2406) + (y * -1.5372) + (z * -0.4986);
	g = (x * -0.9689) + (y * 1.8758) + (z * 0.0415);
	b = (x * 0.0557) + (y * -0.2040) + (z * 1.0570);

	// Assume sRGB
	r = r > 0.0031308
		? ((1.055 * (r ** (1.0 / 2.4))) - 0.055)
		: r * 12.92;

	g = g > 0.0031308
		? ((1.055 * (g ** (1.0 / 2.4))) - 0.055)
		: g * 12.92;

	b = b > 0.0031308
		? ((1.055 * (b ** (1.0 / 2.4))) - 0.055)
		: b * 12.92;

	r = Math.min(Math.max(0, r), 1);
	g = Math.min(Math.max(0, g), 1);
	b = Math.min(Math.max(0, b), 1);

	return [r * 255, g * 255, b * 255];
};

convert$1.xyz.lab = function (xyz) {
	let x = xyz[0];
	let y = xyz[1];
	let z = xyz[2];

	x /= 95.047;
	y /= 100;
	z /= 108.883;

	x = x > 0.008856 ? (x ** (1 / 3)) : (7.787 * x) + (16 / 116);
	y = y > 0.008856 ? (y ** (1 / 3)) : (7.787 * y) + (16 / 116);
	z = z > 0.008856 ? (z ** (1 / 3)) : (7.787 * z) + (16 / 116);

	const l = (116 * y) - 16;
	const a = 500 * (x - y);
	const b = 200 * (y - z);

	return [l, a, b];
};

convert$1.lab.xyz = function (lab) {
	const l = lab[0];
	const a = lab[1];
	const b = lab[2];
	let x;
	let y;
	let z;

	y = (l + 16) / 116;
	x = a / 500 + y;
	z = y - b / 200;

	const y2 = y ** 3;
	const x2 = x ** 3;
	const z2 = z ** 3;
	y = y2 > 0.008856 ? y2 : (y - 16 / 116) / 7.787;
	x = x2 > 0.008856 ? x2 : (x - 16 / 116) / 7.787;
	z = z2 > 0.008856 ? z2 : (z - 16 / 116) / 7.787;

	x *= 95.047;
	y *= 100;
	z *= 108.883;

	return [x, y, z];
};

convert$1.lab.lch = function (lab) {
	const l = lab[0];
	const a = lab[1];
	const b = lab[2];
	let h;

	const hr = Math.atan2(b, a);
	h = hr * 360 / 2 / Math.PI;

	if (h < 0) {
		h += 360;
	}

	const c = Math.sqrt(a * a + b * b);

	return [l, c, h];
};

convert$1.lch.lab = function (lch) {
	const l = lch[0];
	const c = lch[1];
	const h = lch[2];

	const hr = h / 360 * 2 * Math.PI;
	const a = c * Math.cos(hr);
	const b = c * Math.sin(hr);

	return [l, a, b];
};

convert$1.rgb.ansi16 = function (args, saturation = null) {
	const [r, g, b] = args;
	let value = saturation === null ? convert$1.rgb.hsv(args)[2] : saturation; // Hsv -> ansi16 optimization

	value = Math.round(value / 50);

	if (value === 0) {
		return 30;
	}

	let ansi = 30
		+ ((Math.round(b / 255) << 2)
		| (Math.round(g / 255) << 1)
		| Math.round(r / 255));

	if (value === 2) {
		ansi += 60;
	}

	return ansi;
};

convert$1.hsv.ansi16 = function (args) {
	// Optimization here; we already know the value and don't need to get
	// it converted for us.
	return convert$1.rgb.ansi16(convert$1.hsv.rgb(args), args[2]);
};

convert$1.rgb.ansi256 = function (args) {
	const r = args[0];
	const g = args[1];
	const b = args[2];

	// We use the extended greyscale palette here, with the exception of
	// black and white. normal palette only has 4 greyscale shades.
	if (r === g && g === b) {
		if (r < 8) {
			return 16;
		}

		if (r > 248) {
			return 231;
		}

		return Math.round(((r - 8) / 247) * 24) + 232;
	}

	const ansi = 16
		+ (36 * Math.round(r / 255 * 5))
		+ (6 * Math.round(g / 255 * 5))
		+ Math.round(b / 255 * 5);

	return ansi;
};

convert$1.ansi16.rgb = function (args) {
	let color = args % 10;

	// Handle greyscale
	if (color === 0 || color === 7) {
		if (args > 50) {
			color += 3.5;
		}

		color = color / 10.5 * 255;

		return [color, color, color];
	}

	const mult = (~~(args > 50) + 1) * 0.5;
	const r = ((color & 1) * mult) * 255;
	const g = (((color >> 1) & 1) * mult) * 255;
	const b = (((color >> 2) & 1) * mult) * 255;

	return [r, g, b];
};

convert$1.ansi256.rgb = function (args) {
	// Handle greyscale
	if (args >= 232) {
		const c = (args - 232) * 10 + 8;
		return [c, c, c];
	}

	args -= 16;

	let rem;
	const r = Math.floor(args / 36) / 5 * 255;
	const g = Math.floor((rem = args % 36) / 6) / 5 * 255;
	const b = (rem % 6) / 5 * 255;

	return [r, g, b];
};

convert$1.rgb.hex = function (args) {
	const integer = ((Math.round(args[0]) & 0xFF) << 16)
		+ ((Math.round(args[1]) & 0xFF) << 8)
		+ (Math.round(args[2]) & 0xFF);

	const string = integer.toString(16).toUpperCase();
	return '000000'.substring(string.length) + string;
};

convert$1.hex.rgb = function (args) {
	const match = args.toString(16).match(/[a-f0-9]{6}|[a-f0-9]{3}/i);
	if (!match) {
		return [0, 0, 0];
	}

	let colorString = match[0];

	if (match[0].length === 3) {
		colorString = colorString.split('').map(char => {
			return char + char;
		}).join('');
	}

	const integer = parseInt(colorString, 16);
	const r = (integer >> 16) & 0xFF;
	const g = (integer >> 8) & 0xFF;
	const b = integer & 0xFF;

	return [r, g, b];
};

convert$1.rgb.hcg = function (rgb) {
	const r = rgb[0] / 255;
	const g = rgb[1] / 255;
	const b = rgb[2] / 255;
	const max = Math.max(Math.max(r, g), b);
	const min = Math.min(Math.min(r, g), b);
	const chroma = (max - min);
	let grayscale;
	let hue;

	if (chroma < 1) {
		grayscale = min / (1 - chroma);
	} else {
		grayscale = 0;
	}

	if (chroma <= 0) {
		hue = 0;
	} else
	if (max === r) {
		hue = ((g - b) / chroma) % 6;
	} else
	if (max === g) {
		hue = 2 + (b - r) / chroma;
	} else {
		hue = 4 + (r - g) / chroma;
	}

	hue /= 6;
	hue %= 1;

	return [hue * 360, chroma * 100, grayscale * 100];
};

convert$1.hsl.hcg = function (hsl) {
	const s = hsl[1] / 100;
	const l = hsl[2] / 100;

	const c = l < 0.5 ? (2.0 * s * l) : (2.0 * s * (1.0 - l));

	let f = 0;
	if (c < 1.0) {
		f = (l - 0.5 * c) / (1.0 - c);
	}

	return [hsl[0], c * 100, f * 100];
};

convert$1.hsv.hcg = function (hsv) {
	const s = hsv[1] / 100;
	const v = hsv[2] / 100;

	const c = s * v;
	let f = 0;

	if (c < 1.0) {
		f = (v - c) / (1 - c);
	}

	return [hsv[0], c * 100, f * 100];
};

convert$1.hcg.rgb = function (hcg) {
	const h = hcg[0] / 360;
	const c = hcg[1] / 100;
	const g = hcg[2] / 100;

	if (c === 0.0) {
		return [g * 255, g * 255, g * 255];
	}

	const pure = [0, 0, 0];
	const hi = (h % 1) * 6;
	const v = hi % 1;
	const w = 1 - v;
	let mg = 0;

	/* eslint-disable max-statements-per-line */
	switch (Math.floor(hi)) {
		case 0:
			pure[0] = 1; pure[1] = v; pure[2] = 0; break;
		case 1:
			pure[0] = w; pure[1] = 1; pure[2] = 0; break;
		case 2:
			pure[0] = 0; pure[1] = 1; pure[2] = v; break;
		case 3:
			pure[0] = 0; pure[1] = w; pure[2] = 1; break;
		case 4:
			pure[0] = v; pure[1] = 0; pure[2] = 1; break;
		default:
			pure[0] = 1; pure[1] = 0; pure[2] = w;
	}
	/* eslint-enable max-statements-per-line */

	mg = (1.0 - c) * g;

	return [
		(c * pure[0] + mg) * 255,
		(c * pure[1] + mg) * 255,
		(c * pure[2] + mg) * 255
	];
};

convert$1.hcg.hsv = function (hcg) {
	const c = hcg[1] / 100;
	const g = hcg[2] / 100;

	const v = c + g * (1.0 - c);
	let f = 0;

	if (v > 0.0) {
		f = c / v;
	}

	return [hcg[0], f * 100, v * 100];
};

convert$1.hcg.hsl = function (hcg) {
	const c = hcg[1] / 100;
	const g = hcg[2] / 100;

	const l = g * (1.0 - c) + 0.5 * c;
	let s = 0;

	if (l > 0.0 && l < 0.5) {
		s = c / (2 * l);
	} else
	if (l >= 0.5 && l < 1.0) {
		s = c / (2 * (1 - l));
	}

	return [hcg[0], s * 100, l * 100];
};

convert$1.hcg.hwb = function (hcg) {
	const c = hcg[1] / 100;
	const g = hcg[2] / 100;
	const v = c + g * (1.0 - c);
	return [hcg[0], (v - c) * 100, (1 - v) * 100];
};

convert$1.hwb.hcg = function (hwb) {
	const w = hwb[1] / 100;
	const b = hwb[2] / 100;
	const v = 1 - b;
	const c = v - w;
	let g = 0;

	if (c < 1) {
		g = (v - c) / (1 - c);
	}

	return [hwb[0], c * 100, g * 100];
};

convert$1.apple.rgb = function (apple) {
	return [(apple[0] / 65535) * 255, (apple[1] / 65535) * 255, (apple[2] / 65535) * 255];
};

convert$1.rgb.apple = function (rgb) {
	return [(rgb[0] / 255) * 65535, (rgb[1] / 255) * 65535, (rgb[2] / 255) * 65535];
};

convert$1.gray.rgb = function (args) {
	return [args[0] / 100 * 255, args[0] / 100 * 255, args[0] / 100 * 255];
};

convert$1.gray.hsl = function (args) {
	return [0, 0, args[0]];
};

convert$1.gray.hsv = convert$1.gray.hsl;

convert$1.gray.hwb = function (gray) {
	return [0, 100, gray[0]];
};

convert$1.gray.cmyk = function (gray) {
	return [0, 0, 0, gray[0]];
};

convert$1.gray.lab = function (gray) {
	return [gray[0], 0, 0];
};

convert$1.gray.hex = function (gray) {
	const val = Math.round(gray[0] / 100 * 255) & 0xFF;
	const integer = (val << 16) + (val << 8) + val;

	const string = integer.toString(16).toUpperCase();
	return '000000'.substring(string.length) + string;
};

convert$1.rgb.gray = function (rgb) {
	const val = (rgb[0] + rgb[1] + rgb[2]) / 3;
	return [val / 255 * 100];
};

/*
	This function routes a model to all other models.

	all functions that are routed have a property `.conversion` attached
	to the returned synthetic function. This property is an array
	of strings, each with the steps in between the 'from' and 'to'
	color models (inclusive).

	conversions that are not possible simply are not included.
*/

function buildGraph() {
	const graph = {};
	// https://jsperf.com/object-keys-vs-for-in-with-closure/3
	const models = Object.keys(conversions);

	for (let len = models.length, i = 0; i < len; i++) {
		graph[models[i]] = {
			// http://jsperf.com/1-vs-infinity
			// micro-opt, but this is simple.
			distance: -1,
			parent: null
		};
	}

	return graph;
}

// https://en.wikipedia.org/wiki/Breadth-first_search
function deriveBFS(fromModel) {
	const graph = buildGraph();
	const queue = [fromModel]; // Unshift -> queue -> pop

	graph[fromModel].distance = 0;

	while (queue.length) {
		const current = queue.pop();
		const adjacents = Object.keys(conversions[current]);

		for (let len = adjacents.length, i = 0; i < len; i++) {
			const adjacent = adjacents[i];
			const node = graph[adjacent];

			if (node.distance === -1) {
				node.distance = graph[current].distance + 1;
				node.parent = current;
				queue.unshift(adjacent);
			}
		}
	}

	return graph;
}

function link(from, to) {
	return function (args) {
		return to(from(args));
	};
}

function wrapConversion(toModel, graph) {
	const path = [graph[toModel].parent, toModel];
	let fn = conversions[graph[toModel].parent][toModel];

	let cur = graph[toModel].parent;
	while (graph[cur].parent) {
		path.unshift(graph[cur].parent);
		fn = link(conversions[graph[cur].parent][cur], fn);
		cur = graph[cur].parent;
	}

	fn.conversion = path;
	return fn;
}

var route = function (fromModel) {
	const graph = deriveBFS(fromModel);
	const conversion = {};

	const models = Object.keys(graph);
	for (let len = models.length, i = 0; i < len; i++) {
		const toModel = models[i];
		const node = graph[toModel];

		if (node.parent === null) {
			// No possible conversion, or this node is the source model.
			continue;
		}

		conversion[toModel] = wrapConversion(toModel, graph);
	}

	return conversion;
};

const convert = {};

const models = Object.keys(conversions);

function wrapRaw(fn) {
	const wrappedFn = function (...args) {
		const arg0 = args[0];
		if (arg0 === undefined || arg0 === null) {
			return arg0;
		}

		if (arg0.length > 1) {
			args = arg0;
		}

		return fn(args);
	};

	// Preserve .conversion property if there is one
	if ('conversion' in fn) {
		wrappedFn.conversion = fn.conversion;
	}

	return wrappedFn;
}

function wrapRounded(fn) {
	const wrappedFn = function (...args) {
		const arg0 = args[0];

		if (arg0 === undefined || arg0 === null) {
			return arg0;
		}

		if (arg0.length > 1) {
			args = arg0;
		}

		const result = fn(args);

		// We're assuming the result is an array here.
		// see notice in conversions.js; don't use box types
		// in conversion functions.
		if (typeof result === 'object') {
			for (let len = result.length, i = 0; i < len; i++) {
				result[i] = Math.round(result[i]);
			}
		}

		return result;
	};

	// Preserve .conversion property if there is one
	if ('conversion' in fn) {
		wrappedFn.conversion = fn.conversion;
	}

	return wrappedFn;
}

models.forEach(fromModel => {
	convert[fromModel] = {};

	Object.defineProperty(convert[fromModel], 'channels', {value: conversions[fromModel].channels});
	Object.defineProperty(convert[fromModel], 'labels', {value: conversions[fromModel].labels});

	const routes = route(fromModel);
	const routeModels = Object.keys(routes);

	routeModels.forEach(toModel => {
		const fn = routes[toModel];

		convert[fromModel][toModel] = wrapRounded(fn);
		convert[fromModel][toModel].raw = wrapRaw(fn);
	});
});

var colorConvert = convert;

var ansiStyles = createCommonjsModule(function (module) {

const wrapAnsi16 = (fn, offset) => (...args) => {
	const code = fn(...args);
	return `\u001B[${code + offset}m`;
};

const wrapAnsi256 = (fn, offset) => (...args) => {
	const code = fn(...args);
	return `\u001B[${38 + offset};5;${code}m`;
};

const wrapAnsi16m = (fn, offset) => (...args) => {
	const rgb = fn(...args);
	return `\u001B[${38 + offset};2;${rgb[0]};${rgb[1]};${rgb[2]}m`;
};

const ansi2ansi = n => n;
const rgb2rgb = (r, g, b) => [r, g, b];

const setLazyProperty = (object, property, get) => {
	Object.defineProperty(object, property, {
		get: () => {
			const value = get();

			Object.defineProperty(object, property, {
				value,
				enumerable: true,
				configurable: true
			});

			return value;
		},
		enumerable: true,
		configurable: true
	});
};

/** @type {typeof import('color-convert')} */
let colorConvert$1;
const makeDynamicStyles = (wrap, targetSpace, identity, isBackground) => {
	if (colorConvert$1 === undefined) {
		colorConvert$1 = colorConvert;
	}

	const offset = isBackground ? 10 : 0;
	const styles = {};

	for (const [sourceSpace, suite] of Object.entries(colorConvert$1)) {
		const name = sourceSpace === 'ansi16' ? 'ansi' : sourceSpace;
		if (sourceSpace === targetSpace) {
			styles[name] = wrap(identity, offset);
		} else if (typeof suite === 'object') {
			styles[name] = wrap(suite[targetSpace], offset);
		}
	}

	return styles;
};

function assembleStyles() {
	const codes = new Map();
	const styles = {
		modifier: {
			reset: [0, 0],
			// 21 isn't widely supported and 22 does the same thing
			bold: [1, 22],
			dim: [2, 22],
			italic: [3, 23],
			underline: [4, 24],
			inverse: [7, 27],
			hidden: [8, 28],
			strikethrough: [9, 29]
		},
		color: {
			black: [30, 39],
			red: [31, 39],
			green: [32, 39],
			yellow: [33, 39],
			blue: [34, 39],
			magenta: [35, 39],
			cyan: [36, 39],
			white: [37, 39],

			// Bright color
			blackBright: [90, 39],
			redBright: [91, 39],
			greenBright: [92, 39],
			yellowBright: [93, 39],
			blueBright: [94, 39],
			magentaBright: [95, 39],
			cyanBright: [96, 39],
			whiteBright: [97, 39]
		},
		bgColor: {
			bgBlack: [40, 49],
			bgRed: [41, 49],
			bgGreen: [42, 49],
			bgYellow: [43, 49],
			bgBlue: [44, 49],
			bgMagenta: [45, 49],
			bgCyan: [46, 49],
			bgWhite: [47, 49],

			// Bright color
			bgBlackBright: [100, 49],
			bgRedBright: [101, 49],
			bgGreenBright: [102, 49],
			bgYellowBright: [103, 49],
			bgBlueBright: [104, 49],
			bgMagentaBright: [105, 49],
			bgCyanBright: [106, 49],
			bgWhiteBright: [107, 49]
		}
	};

	// Alias bright black as gray (and grey)
	styles.color.gray = styles.color.blackBright;
	styles.bgColor.bgGray = styles.bgColor.bgBlackBright;
	styles.color.grey = styles.color.blackBright;
	styles.bgColor.bgGrey = styles.bgColor.bgBlackBright;

	for (const [groupName, group] of Object.entries(styles)) {
		for (const [styleName, style] of Object.entries(group)) {
			styles[styleName] = {
				open: `\u001B[${style[0]}m`,
				close: `\u001B[${style[1]}m`
			};

			group[styleName] = styles[styleName];

			codes.set(style[0], style[1]);
		}

		Object.defineProperty(styles, groupName, {
			value: group,
			enumerable: false
		});
	}

	Object.defineProperty(styles, 'codes', {
		value: codes,
		enumerable: false
	});

	styles.color.close = '\u001B[39m';
	styles.bgColor.close = '\u001B[49m';

	setLazyProperty(styles.color, 'ansi', () => makeDynamicStyles(wrapAnsi16, 'ansi16', ansi2ansi, false));
	setLazyProperty(styles.color, 'ansi256', () => makeDynamicStyles(wrapAnsi256, 'ansi256', ansi2ansi, false));
	setLazyProperty(styles.color, 'ansi16m', () => makeDynamicStyles(wrapAnsi16m, 'rgb', rgb2rgb, false));
	setLazyProperty(styles.bgColor, 'ansi', () => makeDynamicStyles(wrapAnsi16, 'ansi16', ansi2ansi, true));
	setLazyProperty(styles.bgColor, 'ansi256', () => makeDynamicStyles(wrapAnsi256, 'ansi256', ansi2ansi, true));
	setLazyProperty(styles.bgColor, 'ansi16m', () => makeDynamicStyles(wrapAnsi16m, 'rgb', rgb2rgb, true));

	return styles;
}

// Make the export immutable
Object.defineProperty(module, 'exports', {
	enumerable: true,
	get: assembleStyles
});
}, "/$$rollup_base$$/node_modules/ansi-styles");

var hasFlag = (flag, argv = process.argv) => {
	const prefix = flag.startsWith('-') ? '' : (flag.length === 1 ? '-' : '--');
	const position = argv.indexOf(prefix + flag);
	const terminatorPosition = argv.indexOf('--');
	return position !== -1 && (terminatorPosition === -1 || position < terminatorPosition);
};

const {env: env$1} = process;

let forceColor;
if (hasFlag('no-color') ||
	hasFlag('no-colors') ||
	hasFlag('color=false') ||
	hasFlag('color=never')) {
	forceColor = 0;
} else if (hasFlag('color') ||
	hasFlag('colors') ||
	hasFlag('color=true') ||
	hasFlag('color=always')) {
	forceColor = 1;
}

if ('FORCE_COLOR' in env$1) {
	if (env$1.FORCE_COLOR === 'true') {
		forceColor = 1;
	} else if (env$1.FORCE_COLOR === 'false') {
		forceColor = 0;
	} else {
		forceColor = env$1.FORCE_COLOR.length === 0 ? 1 : Math.min(parseInt(env$1.FORCE_COLOR, 10), 3);
	}
}

function translateLevel(level) {
	if (level === 0) {
		return false;
	}

	return {
		level,
		hasBasic: true,
		has256: level >= 2,
		has16m: level >= 3
	};
}

function supportsColor(haveStream, streamIsTTY) {
	if (forceColor === 0) {
		return 0;
	}

	if (hasFlag('color=16m') ||
		hasFlag('color=full') ||
		hasFlag('color=truecolor')) {
		return 3;
	}

	if (hasFlag('color=256')) {
		return 2;
	}

	if (haveStream && !streamIsTTY && forceColor === undefined) {
		return 0;
	}

	const min = forceColor || 0;

	if (env$1.TERM === 'dumb') {
		return min;
	}

	if (process.platform === 'win32') {
		// Windows 10 build 10586 is the first Windows release that supports 256 colors.
		// Windows 10 build 14931 is the first release that supports 16m/TrueColor.
		const osRelease = os__default['default'].release().split('.');
		if (
			Number(osRelease[0]) >= 10 &&
			Number(osRelease[2]) >= 10586
		) {
			return Number(osRelease[2]) >= 14931 ? 3 : 2;
		}

		return 1;
	}

	if ('CI' in env$1) {
		if (['TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI', 'GITHUB_ACTIONS', 'BUILDKITE'].some(sign => sign in env$1) || env$1.CI_NAME === 'codeship') {
			return 1;
		}

		return min;
	}

	if ('TEAMCITY_VERSION' in env$1) {
		return /^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/.test(env$1.TEAMCITY_VERSION) ? 1 : 0;
	}

	if (env$1.COLORTERM === 'truecolor') {
		return 3;
	}

	if ('TERM_PROGRAM' in env$1) {
		const version = parseInt((env$1.TERM_PROGRAM_VERSION || '').split('.')[0], 10);

		switch (env$1.TERM_PROGRAM) {
			case 'iTerm.app':
				return version >= 3 ? 3 : 2;
			case 'Apple_Terminal':
				return 2;
			// No default
		}
	}

	if (/-256(color)?$/i.test(env$1.TERM)) {
		return 2;
	}

	if (/^screen|^xterm|^vt100|^vt220|^rxvt|color|ansi|cygwin|linux/i.test(env$1.TERM)) {
		return 1;
	}

	if ('COLORTERM' in env$1) {
		return 1;
	}

	return min;
}

function getSupportLevel(stream) {
	const level = supportsColor(stream, stream && stream.isTTY);
	return translateLevel(level);
}

var supportsColor_1 = {
	supportsColor: getSupportLevel,
	stdout: translateLevel(supportsColor(true, tty__default['default'].isatty(1))),
	stderr: translateLevel(supportsColor(true, tty__default['default'].isatty(2)))
};

const stringReplaceAll$1 = (string, substring, replacer) => {
	let index = string.indexOf(substring);
	if (index === -1) {
		return string;
	}

	const substringLength = substring.length;
	let endIndex = 0;
	let returnValue = '';
	do {
		returnValue += string.substr(endIndex, index - endIndex) + substring + replacer;
		endIndex = index + substringLength;
		index = string.indexOf(substring, endIndex);
	} while (index !== -1);

	returnValue += string.substr(endIndex);
	return returnValue;
};

const stringEncaseCRLFWithFirstIndex$1 = (string, prefix, postfix, index) => {
	let endIndex = 0;
	let returnValue = '';
	do {
		const gotCR = string[index - 1] === '\r';
		returnValue += string.substr(endIndex, (gotCR ? index - 1 : index) - endIndex) + prefix + (gotCR ? '\r\n' : '\n') + postfix;
		endIndex = index + 1;
		index = string.indexOf('\n', endIndex);
	} while (index !== -1);

	returnValue += string.substr(endIndex);
	return returnValue;
};

var util = {
	stringReplaceAll: stringReplaceAll$1,
	stringEncaseCRLFWithFirstIndex: stringEncaseCRLFWithFirstIndex$1
};

const TEMPLATE_REGEX = /(?:\\(u(?:[a-f\d]{4}|\{[a-f\d]{1,6}\})|x[a-f\d]{2}|.))|(?:\{(~)?(\w+(?:\([^)]*\))?(?:\.\w+(?:\([^)]*\))?)*)(?:[ \t]|(?=\r?\n)))|(\})|((?:.|[\r\n\f])+?)/gi;
const STYLE_REGEX = /(?:^|\.)(\w+)(?:\(([^)]*)\))?/g;
const STRING_REGEX = /^(['"])((?:\\.|(?!\1)[^\\])*)\1$/;
const ESCAPE_REGEX = /\\(u(?:[a-f\d]{4}|{[a-f\d]{1,6}})|x[a-f\d]{2}|.)|([^\\])/gi;

const ESCAPES = new Map([
	['n', '\n'],
	['r', '\r'],
	['t', '\t'],
	['b', '\b'],
	['f', '\f'],
	['v', '\v'],
	['0', '\0'],
	['\\', '\\'],
	['e', '\u001B'],
	['a', '\u0007']
]);

function unescape(c) {
	const u = c[0] === 'u';
	const bracket = c[1] === '{';

	if ((u && !bracket && c.length === 5) || (c[0] === 'x' && c.length === 3)) {
		return String.fromCharCode(parseInt(c.slice(1), 16));
	}

	if (u && bracket) {
		return String.fromCodePoint(parseInt(c.slice(2, -1), 16));
	}

	return ESCAPES.get(c) || c;
}

function parseArguments(name, arguments_) {
	const results = [];
	const chunks = arguments_.trim().split(/\s*,\s*/g);
	let matches;

	for (const chunk of chunks) {
		const number = Number(chunk);
		if (!Number.isNaN(number)) {
			results.push(number);
		} else if ((matches = chunk.match(STRING_REGEX))) {
			results.push(matches[2].replace(ESCAPE_REGEX, (m, escape, character) => escape ? unescape(escape) : character));
		} else {
			throw new Error(`Invalid Chalk template style argument: ${chunk} (in style '${name}')`);
		}
	}

	return results;
}

function parseStyle(style) {
	STYLE_REGEX.lastIndex = 0;

	const results = [];
	let matches;

	while ((matches = STYLE_REGEX.exec(style)) !== null) {
		const name = matches[1];

		if (matches[2]) {
			const args = parseArguments(name, matches[2]);
			results.push([name].concat(args));
		} else {
			results.push([name]);
		}
	}

	return results;
}

function buildStyle(chalk, styles) {
	const enabled = {};

	for (const layer of styles) {
		for (const style of layer.styles) {
			enabled[style[0]] = layer.inverse ? null : style.slice(1);
		}
	}

	let current = chalk;
	for (const [styleName, styles] of Object.entries(enabled)) {
		if (!Array.isArray(styles)) {
			continue;
		}

		if (!(styleName in current)) {
			throw new Error(`Unknown Chalk style: ${styleName}`);
		}

		current = styles.length > 0 ? current[styleName](...styles) : current[styleName];
	}

	return current;
}

var templates = (chalk, temporary) => {
	const styles = [];
	const chunks = [];
	let chunk = [];

	// eslint-disable-next-line max-params
	temporary.replace(TEMPLATE_REGEX, (m, escapeCharacter, inverse, style, close, character) => {
		if (escapeCharacter) {
			chunk.push(unescape(escapeCharacter));
		} else if (style) {
			const string = chunk.join('');
			chunk = [];
			chunks.push(styles.length === 0 ? string : buildStyle(chalk, styles)(string));
			styles.push({inverse, styles: parseStyle(style)});
		} else if (close) {
			if (styles.length === 0) {
				throw new Error('Found extraneous } in Chalk template literal');
			}

			chunks.push(buildStyle(chalk, styles)(chunk.join('')));
			chunk = [];
			styles.pop();
		} else {
			chunk.push(character);
		}
	});

	chunks.push(chunk.join(''));

	if (styles.length > 0) {
		const errMessage = `Chalk template literal is missing ${styles.length} closing bracket${styles.length === 1 ? '' : 's'} (\`}\`)`;
		throw new Error(errMessage);
	}

	return chunks.join('');
};

const {stdout: stdoutColor, stderr: stderrColor} = supportsColor_1;
const {
	stringReplaceAll,
	stringEncaseCRLFWithFirstIndex
} = util;

const {isArray: isArray$2} = Array;

// `supportsColor.level` → `ansiStyles.color[name]` mapping
const levelMapping = [
	'ansi',
	'ansi',
	'ansi256',
	'ansi16m'
];

const styles = Object.create(null);

const applyOptions = (object, options = {}) => {
	if (options.level && !(Number.isInteger(options.level) && options.level >= 0 && options.level <= 3)) {
		throw new Error('The `level` option should be an integer from 0 to 3');
	}

	// Detect level if not set manually
	const colorLevel = stdoutColor ? stdoutColor.level : 0;
	object.level = options.level === undefined ? colorLevel : options.level;
};

class ChalkClass {
	constructor(options) {
		// eslint-disable-next-line no-constructor-return
		return chalkFactory(options);
	}
}

const chalkFactory = options => {
	const chalk = {};
	applyOptions(chalk, options);

	chalk.template = (...arguments_) => chalkTag(chalk.template, ...arguments_);

	Object.setPrototypeOf(chalk, Chalk.prototype);
	Object.setPrototypeOf(chalk.template, chalk);

	chalk.template.constructor = () => {
		throw new Error('`chalk.constructor()` is deprecated. Use `new chalk.Instance()` instead.');
	};

	chalk.template.Instance = ChalkClass;

	return chalk.template;
};

function Chalk(options) {
	return chalkFactory(options);
}

for (const [styleName, style] of Object.entries(ansiStyles)) {
	styles[styleName] = {
		get() {
			const builder = createBuilder(this, createStyler(style.open, style.close, this._styler), this._isEmpty);
			Object.defineProperty(this, styleName, {value: builder});
			return builder;
		}
	};
}

styles.visible = {
	get() {
		const builder = createBuilder(this, this._styler, true);
		Object.defineProperty(this, 'visible', {value: builder});
		return builder;
	}
};

const usedModels = ['rgb', 'hex', 'keyword', 'hsl', 'hsv', 'hwb', 'ansi', 'ansi256'];

for (const model of usedModels) {
	styles[model] = {
		get() {
			const {level} = this;
			return function (...arguments_) {
				const styler = createStyler(ansiStyles.color[levelMapping[level]][model](...arguments_), ansiStyles.color.close, this._styler);
				return createBuilder(this, styler, this._isEmpty);
			};
		}
	};
}

for (const model of usedModels) {
	const bgModel = 'bg' + model[0].toUpperCase() + model.slice(1);
	styles[bgModel] = {
		get() {
			const {level} = this;
			return function (...arguments_) {
				const styler = createStyler(ansiStyles.bgColor[levelMapping[level]][model](...arguments_), ansiStyles.bgColor.close, this._styler);
				return createBuilder(this, styler, this._isEmpty);
			};
		}
	};
}

const proto = Object.defineProperties(() => {}, {
	...styles,
	level: {
		enumerable: true,
		get() {
			return this._generator.level;
		},
		set(level) {
			this._generator.level = level;
		}
	}
});

const createStyler = (open, close, parent) => {
	let openAll;
	let closeAll;
	if (parent === undefined) {
		openAll = open;
		closeAll = close;
	} else {
		openAll = parent.openAll + open;
		closeAll = close + parent.closeAll;
	}

	return {
		open,
		close,
		openAll,
		closeAll,
		parent
	};
};

const createBuilder = (self, _styler, _isEmpty) => {
	const builder = (...arguments_) => {
		if (isArray$2(arguments_[0]) && isArray$2(arguments_[0].raw)) {
			// Called as a template literal, for example: chalk.red`2 + 3 = {bold ${2+3}}`
			return applyStyle(builder, chalkTag(builder, ...arguments_));
		}

		// Single argument is hot path, implicit coercion is faster than anything
		// eslint-disable-next-line no-implicit-coercion
		return applyStyle(builder, (arguments_.length === 1) ? ('' + arguments_[0]) : arguments_.join(' '));
	};

	// We alter the prototype because we must return a function, but there is
	// no way to create a function with a different prototype
	Object.setPrototypeOf(builder, proto);

	builder._generator = self;
	builder._styler = _styler;
	builder._isEmpty = _isEmpty;

	return builder;
};

const applyStyle = (self, string) => {
	if (self.level <= 0 || !string) {
		return self._isEmpty ? '' : string;
	}

	let styler = self._styler;

	if (styler === undefined) {
		return string;
	}

	const {openAll, closeAll} = styler;
	if (string.indexOf('\u001B') !== -1) {
		while (styler !== undefined) {
			// Replace any instances already present with a re-opening code
			// otherwise only the part of the string until said closing code
			// will be colored, and the rest will simply be 'plain'.
			string = stringReplaceAll(string, styler.close, styler.open);

			styler = styler.parent;
		}
	}

	// We can move both next actions out of loop, because remaining actions in loop won't have
	// any/visible effect on parts we add here. Close the styling before a linebreak and reopen
	// after next line to fix a bleed issue on macOS: https://github.com/chalk/chalk/pull/92
	const lfIndex = string.indexOf('\n');
	if (lfIndex !== -1) {
		string = stringEncaseCRLFWithFirstIndex(string, closeAll, openAll, lfIndex);
	}

	return openAll + string + closeAll;
};

let template;
const chalkTag = (chalk, ...strings) => {
	const [firstString] = strings;

	if (!isArray$2(firstString) || !isArray$2(firstString.raw)) {
		// If chalk() was called by itself or with a string,
		// return the string itself as a string.
		return strings.join(' ');
	}

	const arguments_ = strings.slice(1);
	const parts = [firstString.raw[0]];

	for (let i = 1; i < firstString.length; i++) {
		parts.push(
			String(arguments_[i - 1]).replace(/[{}\\]/g, '\\$&'),
			String(firstString.raw[i])
		);
	}

	if (template === undefined) {
		template = templates;
	}

	return template(chalk, parts.join(''));
};

Object.defineProperties(Chalk.prototype, styles);

const chalk = Chalk(); // eslint-disable-line new-cap
chalk.supportsColor = stdoutColor;
chalk.stderr = Chalk({level: stderrColor ? stderrColor.level : 0}); // eslint-disable-line new-cap
chalk.stderr.supportsColor = stderrColor;

var source = chalk;

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.


var isWindows = process.platform === 'win32';


// JavaScript implementation of realpath, ported from node pre-v6

var DEBUG = process.env.NODE_DEBUG && /fs/.test(process.env.NODE_DEBUG);

function rethrow() {
  // Only enable in debug mode. A backtrace uses ~1000 bytes of heap space and
  // is fairly slow to generate.
  var callback;
  if (DEBUG) {
    var backtrace = new Error;
    callback = debugCallback;
  } else
    callback = missingCallback;

  return callback;

  function debugCallback(err) {
    if (err) {
      backtrace.message = err.message;
      err = backtrace;
      missingCallback(err);
    }
  }

  function missingCallback(err) {
    if (err) {
      if (process.throwDeprecation)
        throw err;  // Forgot a callback but don't know where? Use NODE_DEBUG=fs
      else if (!process.noDeprecation) {
        var msg = 'fs: missing callback ' + (err.stack || err.message);
        if (process.traceDeprecation)
          console.trace(msg);
        else
          console.error(msg);
      }
    }
  }
}

function maybeCallback(cb) {
  return typeof cb === 'function' ? cb : rethrow();
}

path__default['default'].normalize;

// Regexp that finds the next partion of a (partial) path
// result is [base_with_slash, base], e.g. ['somedir/', 'somedir']
if (isWindows) {
  var nextPartRe = /(.*?)(?:[\/\\]+|$)/g;
} else {
  var nextPartRe = /(.*?)(?:[\/]+|$)/g;
}

// Regex to find the device root, including trailing slash. E.g. 'c:\\'.
if (isWindows) {
  var splitRootRe = /^(?:[a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/][^\\\/]+)?[\\\/]*/;
} else {
  var splitRootRe = /^[\/]*/;
}

var realpathSync$1 = function realpathSync(p, cache) {
  // make p is absolute
  p = path__default['default'].resolve(p);

  if (cache && Object.prototype.hasOwnProperty.call(cache, p)) {
    return cache[p];
  }

  var original = p,
      seenLinks = {},
      knownHard = {};

  // current character position in p
  var pos;
  // the partial path so far, including a trailing slash if any
  var current;
  // the partial path without a trailing slash (except when pointing at a root)
  var base;
  // the partial path scanned in the previous round, with slash
  var previous;

  start();

  function start() {
    // Skip over roots
    var m = splitRootRe.exec(p);
    pos = m[0].length;
    current = m[0];
    base = m[0];
    previous = '';

    // On windows, check that the root exists. On unix there is no need.
    if (isWindows && !knownHard[base]) {
      fs__default['default'].lstatSync(base);
      knownHard[base] = true;
    }
  }

  // walk down the path, swapping out linked pathparts for their real
  // values
  // NB: p.length changes.
  while (pos < p.length) {
    // find the next part
    nextPartRe.lastIndex = pos;
    var result = nextPartRe.exec(p);
    previous = current;
    current += result[0];
    base = previous + result[1];
    pos = nextPartRe.lastIndex;

    // continue if not a symlink
    if (knownHard[base] || (cache && cache[base] === base)) {
      continue;
    }

    var resolvedLink;
    if (cache && Object.prototype.hasOwnProperty.call(cache, base)) {
      // some known symbolic link.  no need to stat again.
      resolvedLink = cache[base];
    } else {
      var stat = fs__default['default'].lstatSync(base);
      if (!stat.isSymbolicLink()) {
        knownHard[base] = true;
        if (cache) cache[base] = base;
        continue;
      }

      // read the link if it wasn't read before
      // dev/ino always return 0 on windows, so skip the check.
      var linkTarget = null;
      if (!isWindows) {
        var id = stat.dev.toString(32) + ':' + stat.ino.toString(32);
        if (seenLinks.hasOwnProperty(id)) {
          linkTarget = seenLinks[id];
        }
      }
      if (linkTarget === null) {
        fs__default['default'].statSync(base);
        linkTarget = fs__default['default'].readlinkSync(base);
      }
      resolvedLink = path__default['default'].resolve(previous, linkTarget);
      // track this, if given a cache.
      if (cache) cache[base] = resolvedLink;
      if (!isWindows) seenLinks[id] = linkTarget;
    }

    // resolve the link, then start over
    p = path__default['default'].resolve(resolvedLink, p.slice(pos));
    start();
  }

  if (cache) cache[original] = p;

  return p;
};


var realpath$1 = function realpath(p, cache, cb) {
  if (typeof cb !== 'function') {
    cb = maybeCallback(cache);
    cache = null;
  }

  // make p is absolute
  p = path__default['default'].resolve(p);

  if (cache && Object.prototype.hasOwnProperty.call(cache, p)) {
    return process.nextTick(cb.bind(null, null, cache[p]));
  }

  var original = p,
      seenLinks = {},
      knownHard = {};

  // current character position in p
  var pos;
  // the partial path so far, including a trailing slash if any
  var current;
  // the partial path without a trailing slash (except when pointing at a root)
  var base;
  // the partial path scanned in the previous round, with slash
  var previous;

  start();

  function start() {
    // Skip over roots
    var m = splitRootRe.exec(p);
    pos = m[0].length;
    current = m[0];
    base = m[0];
    previous = '';

    // On windows, check that the root exists. On unix there is no need.
    if (isWindows && !knownHard[base]) {
      fs__default['default'].lstat(base, function(err) {
        if (err) return cb(err);
        knownHard[base] = true;
        LOOP();
      });
    } else {
      process.nextTick(LOOP);
    }
  }

  // walk down the path, swapping out linked pathparts for their real
  // values
  function LOOP() {
    // stop if scanned past end of path
    if (pos >= p.length) {
      if (cache) cache[original] = p;
      return cb(null, p);
    }

    // find the next part
    nextPartRe.lastIndex = pos;
    var result = nextPartRe.exec(p);
    previous = current;
    current += result[0];
    base = previous + result[1];
    pos = nextPartRe.lastIndex;

    // continue if not a symlink
    if (knownHard[base] || (cache && cache[base] === base)) {
      return process.nextTick(LOOP);
    }

    if (cache && Object.prototype.hasOwnProperty.call(cache, base)) {
      // known symbolic link.  no need to stat again.
      return gotResolvedLink(cache[base]);
    }

    return fs__default['default'].lstat(base, gotStat);
  }

  function gotStat(err, stat) {
    if (err) return cb(err);

    // if not a symlink, skip to the next path part
    if (!stat.isSymbolicLink()) {
      knownHard[base] = true;
      if (cache) cache[base] = base;
      return process.nextTick(LOOP);
    }

    // stat & read the link if not read before
    // call gotTarget as soon as the link target is known
    // dev/ino always return 0 on windows, so skip the check.
    if (!isWindows) {
      var id = stat.dev.toString(32) + ':' + stat.ino.toString(32);
      if (seenLinks.hasOwnProperty(id)) {
        return gotTarget(null, seenLinks[id], base);
      }
    }
    fs__default['default'].stat(base, function(err) {
      if (err) return cb(err);

      fs__default['default'].readlink(base, function(err, target) {
        if (!isWindows) seenLinks[id] = target;
        gotTarget(err, target);
      });
    });
  }

  function gotTarget(err, target, base) {
    if (err) return cb(err);

    var resolvedLink = path__default['default'].resolve(previous, target);
    if (cache) cache[base] = resolvedLink;
    gotResolvedLink(resolvedLink);
  }

  function gotResolvedLink(resolvedLink) {
    // resolve the link, then start over
    p = path__default['default'].resolve(resolvedLink, p.slice(pos));
    start();
  }
};

var old = {
	realpathSync: realpathSync$1,
	realpath: realpath$1
};

var fs_realpath = realpath;
realpath.realpath = realpath;
realpath.sync = realpathSync;
realpath.realpathSync = realpathSync;
realpath.monkeypatch = monkeypatch;
realpath.unmonkeypatch = unmonkeypatch;


var origRealpath = fs__default['default'].realpath;
var origRealpathSync = fs__default['default'].realpathSync;

var version = process.version;
var ok = /^v[0-5]\./.test(version);


function newError (er) {
  return er && er.syscall === 'realpath' && (
    er.code === 'ELOOP' ||
    er.code === 'ENOMEM' ||
    er.code === 'ENAMETOOLONG'
  )
}

function realpath (p, cache, cb) {
  if (ok) {
    return origRealpath(p, cache, cb)
  }

  if (typeof cache === 'function') {
    cb = cache;
    cache = null;
  }
  origRealpath(p, cache, function (er, result) {
    if (newError(er)) {
      old.realpath(p, cache, cb);
    } else {
      cb(er, result);
    }
  });
}

function realpathSync (p, cache) {
  if (ok) {
    return origRealpathSync(p, cache)
  }

  try {
    return origRealpathSync(p, cache)
  } catch (er) {
    if (newError(er)) {
      return old.realpathSync(p, cache)
    } else {
      throw er
    }
  }
}

function monkeypatch () {
  fs__default['default'].realpath = realpath;
  fs__default['default'].realpathSync = realpathSync;
}

function unmonkeypatch () {
  fs__default['default'].realpath = origRealpath;
  fs__default['default'].realpathSync = origRealpathSync;
}

var concatMap = function (xs, fn) {
    var res = [];
    for (var i = 0; i < xs.length; i++) {
        var x = fn(xs[i], i);
        if (isArray$1(x)) res.push.apply(res, x);
        else res.push(x);
    }
    return res;
};

var isArray$1 = Array.isArray || function (xs) {
    return Object.prototype.toString.call(xs) === '[object Array]';
};

var balancedMatch = balanced;
function balanced(a, b, str) {
  if (a instanceof RegExp) a = maybeMatch(a, str);
  if (b instanceof RegExp) b = maybeMatch(b, str);

  var r = range(a, b, str);

  return r && {
    start: r[0],
    end: r[1],
    pre: str.slice(0, r[0]),
    body: str.slice(r[0] + a.length, r[1]),
    post: str.slice(r[1] + b.length)
  };
}

function maybeMatch(reg, str) {
  var m = str.match(reg);
  return m ? m[0] : null;
}

balanced.range = range;
function range(a, b, str) {
  var begs, beg, left, right, result;
  var ai = str.indexOf(a);
  var bi = str.indexOf(b, ai + 1);
  var i = ai;

  if (ai >= 0 && bi > 0) {
    if(a===b) {
      return [ai, bi];
    }
    begs = [];
    left = str.length;

    while (i >= 0 && !result) {
      if (i == ai) {
        begs.push(i);
        ai = str.indexOf(a, i + 1);
      } else if (begs.length == 1) {
        result = [ begs.pop(), bi ];
      } else {
        beg = begs.pop();
        if (beg < left) {
          left = beg;
          right = bi;
        }

        bi = str.indexOf(b, i + 1);
      }

      i = ai < bi && ai >= 0 ? ai : bi;
    }

    if (begs.length) {
      result = [ left, right ];
    }
  }

  return result;
}

var braceExpansion = expandTop;

var escSlash = '\0SLASH'+Math.random()+'\0';
var escOpen = '\0OPEN'+Math.random()+'\0';
var escClose = '\0CLOSE'+Math.random()+'\0';
var escComma = '\0COMMA'+Math.random()+'\0';
var escPeriod = '\0PERIOD'+Math.random()+'\0';

function numeric(str) {
  return parseInt(str, 10) == str
    ? parseInt(str, 10)
    : str.charCodeAt(0);
}

function escapeBraces(str) {
  return str.split('\\\\').join(escSlash)
            .split('\\{').join(escOpen)
            .split('\\}').join(escClose)
            .split('\\,').join(escComma)
            .split('\\.').join(escPeriod);
}

function unescapeBraces(str) {
  return str.split(escSlash).join('\\')
            .split(escOpen).join('{')
            .split(escClose).join('}')
            .split(escComma).join(',')
            .split(escPeriod).join('.');
}


// Basically just str.split(","), but handling cases
// where we have nested braced sections, which should be
// treated as individual members, like {a,{b,c},d}
function parseCommaParts(str) {
  if (!str)
    return [''];

  var parts = [];
  var m = balancedMatch('{', '}', str);

  if (!m)
    return str.split(',');

  var pre = m.pre;
  var body = m.body;
  var post = m.post;
  var p = pre.split(',');

  p[p.length-1] += '{' + body + '}';
  var postParts = parseCommaParts(post);
  if (post.length) {
    p[p.length-1] += postParts.shift();
    p.push.apply(p, postParts);
  }

  parts.push.apply(parts, p);

  return parts;
}

function expandTop(str) {
  if (!str)
    return [];

  // I don't know why Bash 4.3 does this, but it does.
  // Anything starting with {} will have the first two bytes preserved
  // but *only* at the top level, so {},a}b will not expand to anything,
  // but a{},b}c will be expanded to [a}c,abc].
  // One could argue that this is a bug in Bash, but since the goal of
  // this module is to match Bash's rules, we escape a leading {}
  if (str.substr(0, 2) === '{}') {
    str = '\\{\\}' + str.substr(2);
  }

  return expand(escapeBraces(str), true).map(unescapeBraces);
}

function embrace(str) {
  return '{' + str + '}';
}
function isPadded(el) {
  return /^-?0\d/.test(el);
}

function lte(i, y) {
  return i <= y;
}
function gte(i, y) {
  return i >= y;
}

function expand(str, isTop) {
  var expansions = [];

  var m = balancedMatch('{', '}', str);
  if (!m || /\$$/.test(m.pre)) return [str];

  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
  var isSequence = isNumericSequence || isAlphaSequence;
  var isOptions = m.body.indexOf(',') >= 0;
  if (!isSequence && !isOptions) {
    // {a},b}
    if (m.post.match(/,.*\}/)) {
      str = m.pre + '{' + m.body + escClose + m.post;
      return expand(str);
    }
    return [str];
  }

  var n;
  if (isSequence) {
    n = m.body.split(/\.\./);
  } else {
    n = parseCommaParts(m.body);
    if (n.length === 1) {
      // x{{a,b}}y ==> x{a}y x{b}y
      n = expand(n[0], false).map(embrace);
      if (n.length === 1) {
        var post = m.post.length
          ? expand(m.post, false)
          : [''];
        return post.map(function(p) {
          return m.pre + n[0] + p;
        });
      }
    }
  }

  // at this point, n is the parts, and we know it's not a comma set
  // with a single entry.

  // no need to expand pre, since it is guaranteed to be free of brace-sets
  var pre = m.pre;
  var post = m.post.length
    ? expand(m.post, false)
    : [''];

  var N;

  if (isSequence) {
    var x = numeric(n[0]);
    var y = numeric(n[1]);
    var width = Math.max(n[0].length, n[1].length);
    var incr = n.length == 3
      ? Math.abs(numeric(n[2]))
      : 1;
    var test = lte;
    var reverse = y < x;
    if (reverse) {
      incr *= -1;
      test = gte;
    }
    var pad = n.some(isPadded);

    N = [];

    for (var i = x; test(i, y); i += incr) {
      var c;
      if (isAlphaSequence) {
        c = String.fromCharCode(i);
        if (c === '\\')
          c = '';
      } else {
        c = String(i);
        if (pad) {
          var need = width - c.length;
          if (need > 0) {
            var z = new Array(need + 1).join('0');
            if (i < 0)
              c = '-' + z + c.slice(1);
            else
              c = z + c;
          }
        }
      }
      N.push(c);
    }
  } else {
    N = concatMap(n, function(el) { return expand(el, false) });
  }

  for (var j = 0; j < N.length; j++) {
    for (var k = 0; k < post.length; k++) {
      var expansion = pre + N[j] + post[k];
      if (!isTop || isSequence || expansion)
        expansions.push(expansion);
    }
  }

  return expansions;
}

var minimatch_1 = minimatch;
minimatch.Minimatch = Minimatch$1;

var path = { sep: '/' };
try {
  path = path__default['default'];
} catch (er) {}

var GLOBSTAR = minimatch.GLOBSTAR = Minimatch$1.GLOBSTAR = {};


var plTypes = {
  '!': { open: '(?:(?!(?:', close: '))[^/]*?)'},
  '?': { open: '(?:', close: ')?' },
  '+': { open: '(?:', close: ')+' },
  '*': { open: '(?:', close: ')*' },
  '@': { open: '(?:', close: ')' }
};

// any single thing other than /
// don't need to escape / when using new RegExp()
var qmark = '[^/]';

// * => any number of characters
var star = qmark + '*?';

// ** when dots are allowed.  Anything goes, except .. and .
// not (^ or / followed by one or two dots followed by $ or /),
// followed by anything, any number of times.
var twoStarDot = '(?:(?!(?:\\\/|^)(?:\\.{1,2})($|\\\/)).)*?';

// not a ^ or / followed by a dot,
// followed by anything, any number of times.
var twoStarNoDot = '(?:(?!(?:\\\/|^)\\.).)*?';

// characters that need to be escaped in RegExp.
var reSpecials = charSet('().*{}+?[]^$\\!');

// "abc" -> { a:true, b:true, c:true }
function charSet (s) {
  return s.split('').reduce(function (set, c) {
    set[c] = true;
    return set
  }, {})
}

// normalizes slashes.
var slashSplit = /\/+/;

minimatch.filter = filter;
function filter (pattern, options) {
  options = options || {};
  return function (p, i, list) {
    return minimatch(p, pattern, options)
  }
}

function ext (a, b) {
  a = a || {};
  b = b || {};
  var t = {};
  Object.keys(b).forEach(function (k) {
    t[k] = b[k];
  });
  Object.keys(a).forEach(function (k) {
    t[k] = a[k];
  });
  return t
}

minimatch.defaults = function (def) {
  if (!def || !Object.keys(def).length) return minimatch

  var orig = minimatch;

  var m = function minimatch (p, pattern, options) {
    return orig.minimatch(p, pattern, ext(def, options))
  };

  m.Minimatch = function Minimatch (pattern, options) {
    return new orig.Minimatch(pattern, ext(def, options))
  };

  return m
};

Minimatch$1.defaults = function (def) {
  if (!def || !Object.keys(def).length) return Minimatch$1
  return minimatch.defaults(def).Minimatch
};

function minimatch (p, pattern, options) {
  if (typeof pattern !== 'string') {
    throw new TypeError('glob pattern string required')
  }

  if (!options) options = {};

  // shortcut: comments match nothing.
  if (!options.nocomment && pattern.charAt(0) === '#') {
    return false
  }

  // "" only matches ""
  if (pattern.trim() === '') return p === ''

  return new Minimatch$1(pattern, options).match(p)
}

function Minimatch$1 (pattern, options) {
  if (!(this instanceof Minimatch$1)) {
    return new Minimatch$1(pattern, options)
  }

  if (typeof pattern !== 'string') {
    throw new TypeError('glob pattern string required')
  }

  if (!options) options = {};
  pattern = pattern.trim();

  // windows support: need to use /, not \
  if (path.sep !== '/') {
    pattern = pattern.split(path.sep).join('/');
  }

  this.options = options;
  this.set = [];
  this.pattern = pattern;
  this.regexp = null;
  this.negate = false;
  this.comment = false;
  this.empty = false;

  // make the set of regexps etc.
  this.make();
}

Minimatch$1.prototype.debug = function () {};

Minimatch$1.prototype.make = make;
function make () {
  // don't do it more than once.
  if (this._made) return

  var pattern = this.pattern;
  var options = this.options;

  // empty patterns and comments match nothing.
  if (!options.nocomment && pattern.charAt(0) === '#') {
    this.comment = true;
    return
  }
  if (!pattern) {
    this.empty = true;
    return
  }

  // step 1: figure out negation, etc.
  this.parseNegate();

  // step 2: expand braces
  var set = this.globSet = this.braceExpand();

  if (options.debug) this.debug = console.error;

  this.debug(this.pattern, set);

  // step 3: now we have a set, so turn each one into a series of path-portion
  // matching patterns.
  // These will be regexps, except in the case of "**", which is
  // set to the GLOBSTAR object for globstar behavior,
  // and will not contain any / characters
  set = this.globParts = set.map(function (s) {
    return s.split(slashSplit)
  });

  this.debug(this.pattern, set);

  // glob --> regexps
  set = set.map(function (s, si, set) {
    return s.map(this.parse, this)
  }, this);

  this.debug(this.pattern, set);

  // filter out everything that didn't compile properly.
  set = set.filter(function (s) {
    return s.indexOf(false) === -1
  });

  this.debug(this.pattern, set);

  this.set = set;
}

Minimatch$1.prototype.parseNegate = parseNegate;
function parseNegate () {
  var pattern = this.pattern;
  var negate = false;
  var options = this.options;
  var negateOffset = 0;

  if (options.nonegate) return

  for (var i = 0, l = pattern.length
    ; i < l && pattern.charAt(i) === '!'
    ; i++) {
    negate = !negate;
    negateOffset++;
  }

  if (negateOffset) this.pattern = pattern.substr(negateOffset);
  this.negate = negate;
}

// Brace expansion:
// a{b,c}d -> abd acd
// a{b,}c -> abc ac
// a{0..3}d -> a0d a1d a2d a3d
// a{b,c{d,e}f}g -> abg acdfg acefg
// a{b,c}d{e,f}g -> abdeg acdeg abdeg abdfg
//
// Invalid sets are not expanded.
// a{2..}b -> a{2..}b
// a{b}c -> a{b}c
minimatch.braceExpand = function (pattern, options) {
  return braceExpand(pattern, options)
};

Minimatch$1.prototype.braceExpand = braceExpand;

function braceExpand (pattern, options) {
  if (!options) {
    if (this instanceof Minimatch$1) {
      options = this.options;
    } else {
      options = {};
    }
  }

  pattern = typeof pattern === 'undefined'
    ? this.pattern : pattern;

  if (typeof pattern === 'undefined') {
    throw new TypeError('undefined pattern')
  }

  if (options.nobrace ||
    !pattern.match(/\{.*\}/)) {
    // shortcut. no need to expand.
    return [pattern]
  }

  return braceExpansion(pattern)
}

// parse a component of the expanded set.
// At this point, no pattern may contain "/" in it
// so we're going to return a 2d array, where each entry is the full
// pattern, split on '/', and then turned into a regular expression.
// A regexp is made at the end which joins each array with an
// escaped /, and another full one which joins each regexp with |.
//
// Following the lead of Bash 4.1, note that "**" only has special meaning
// when it is the *only* thing in a path portion.  Otherwise, any series
// of * is equivalent to a single *.  Globstar behavior is enabled by
// default, and can be disabled by setting options.noglobstar.
Minimatch$1.prototype.parse = parse;
var SUBPARSE = {};
function parse (pattern, isSub) {
  if (pattern.length > 1024 * 64) {
    throw new TypeError('pattern is too long')
  }

  var options = this.options;

  // shortcuts
  if (!options.noglobstar && pattern === '**') return GLOBSTAR
  if (pattern === '') return ''

  var re = '';
  var hasMagic = !!options.nocase;
  var escaping = false;
  // ? => one single character
  var patternListStack = [];
  var negativeLists = [];
  var stateChar;
  var inClass = false;
  var reClassStart = -1;
  var classStart = -1;
  // . and .. never match anything that doesn't start with .,
  // even when options.dot is set.
  var patternStart = pattern.charAt(0) === '.' ? '' // anything
  // not (start or / followed by . or .. followed by / or end)
  : options.dot ? '(?!(?:^|\\\/)\\.{1,2}(?:$|\\\/))'
  : '(?!\\.)';
  var self = this;

  function clearStateChar () {
    if (stateChar) {
      // we had some state-tracking character
      // that wasn't consumed by this pass.
      switch (stateChar) {
        case '*':
          re += star;
          hasMagic = true;
        break
        case '?':
          re += qmark;
          hasMagic = true;
        break
        default:
          re += '\\' + stateChar;
        break
      }
      self.debug('clearStateChar %j %j', stateChar, re);
      stateChar = false;
    }
  }

  for (var i = 0, len = pattern.length, c
    ; (i < len) && (c = pattern.charAt(i))
    ; i++) {
    this.debug('%s\t%s %s %j', pattern, i, re, c);

    // skip over any that are escaped.
    if (escaping && reSpecials[c]) {
      re += '\\' + c;
      escaping = false;
      continue
    }

    switch (c) {
      case '/':
        // completely not allowed, even escaped.
        // Should already be path-split by now.
        return false

      case '\\':
        clearStateChar();
        escaping = true;
      continue

      // the various stateChar values
      // for the "extglob" stuff.
      case '?':
      case '*':
      case '+':
      case '@':
      case '!':
        this.debug('%s\t%s %s %j <-- stateChar', pattern, i, re, c);

        // all of those are literals inside a class, except that
        // the glob [!a] means [^a] in regexp
        if (inClass) {
          this.debug('  in class');
          if (c === '!' && i === classStart + 1) c = '^';
          re += c;
          continue
        }

        // if we already have a stateChar, then it means
        // that there was something like ** or +? in there.
        // Handle the stateChar, then proceed with this one.
        self.debug('call clearStateChar %j', stateChar);
        clearStateChar();
        stateChar = c;
        // if extglob is disabled, then +(asdf|foo) isn't a thing.
        // just clear the statechar *now*, rather than even diving into
        // the patternList stuff.
        if (options.noext) clearStateChar();
      continue

      case '(':
        if (inClass) {
          re += '(';
          continue
        }

        if (!stateChar) {
          re += '\\(';
          continue
        }

        patternListStack.push({
          type: stateChar,
          start: i - 1,
          reStart: re.length,
          open: plTypes[stateChar].open,
          close: plTypes[stateChar].close
        });
        // negation is (?:(?!js)[^/]*)
        re += stateChar === '!' ? '(?:(?!(?:' : '(?:';
        this.debug('plType %j %j', stateChar, re);
        stateChar = false;
      continue

      case ')':
        if (inClass || !patternListStack.length) {
          re += '\\)';
          continue
        }

        clearStateChar();
        hasMagic = true;
        var pl = patternListStack.pop();
        // negation is (?:(?!js)[^/]*)
        // The others are (?:<pattern>)<type>
        re += pl.close;
        if (pl.type === '!') {
          negativeLists.push(pl);
        }
        pl.reEnd = re.length;
      continue

      case '|':
        if (inClass || !patternListStack.length || escaping) {
          re += '\\|';
          escaping = false;
          continue
        }

        clearStateChar();
        re += '|';
      continue

      // these are mostly the same in regexp and glob
      case '[':
        // swallow any state-tracking char before the [
        clearStateChar();

        if (inClass) {
          re += '\\' + c;
          continue
        }

        inClass = true;
        classStart = i;
        reClassStart = re.length;
        re += c;
      continue

      case ']':
        //  a right bracket shall lose its special
        //  meaning and represent itself in
        //  a bracket expression if it occurs
        //  first in the list.  -- POSIX.2 2.8.3.2
        if (i === classStart + 1 || !inClass) {
          re += '\\' + c;
          escaping = false;
          continue
        }

        // handle the case where we left a class open.
        // "[z-a]" is valid, equivalent to "\[z-a\]"
        if (inClass) {
          // split where the last [ was, make sure we don't have
          // an invalid re. if so, re-walk the contents of the
          // would-be class to re-translate any characters that
          // were passed through as-is
          // TODO: It would probably be faster to determine this
          // without a try/catch and a new RegExp, but it's tricky
          // to do safely.  For now, this is safe and works.
          var cs = pattern.substring(classStart + 1, i);
          try {
            RegExp('[' + cs + ']');
          } catch (er) {
            // not a valid class!
            var sp = this.parse(cs, SUBPARSE);
            re = re.substr(0, reClassStart) + '\\[' + sp[0] + '\\]';
            hasMagic = hasMagic || sp[1];
            inClass = false;
            continue
          }
        }

        // finish up the class.
        hasMagic = true;
        inClass = false;
        re += c;
      continue

      default:
        // swallow any state char that wasn't consumed
        clearStateChar();

        if (escaping) {
          // no need
          escaping = false;
        } else if (reSpecials[c]
          && !(c === '^' && inClass)) {
          re += '\\';
        }

        re += c;

    } // switch
  } // for

  // handle the case where we left a class open.
  // "[abc" is valid, equivalent to "\[abc"
  if (inClass) {
    // split where the last [ was, and escape it
    // this is a huge pita.  We now have to re-walk
    // the contents of the would-be class to re-translate
    // any characters that were passed through as-is
    cs = pattern.substr(classStart + 1);
    sp = this.parse(cs, SUBPARSE);
    re = re.substr(0, reClassStart) + '\\[' + sp[0];
    hasMagic = hasMagic || sp[1];
  }

  // handle the case where we had a +( thing at the *end*
  // of the pattern.
  // each pattern list stack adds 3 chars, and we need to go through
  // and escape any | chars that were passed through as-is for the regexp.
  // Go through and escape them, taking care not to double-escape any
  // | chars that were already escaped.
  for (pl = patternListStack.pop(); pl; pl = patternListStack.pop()) {
    var tail = re.slice(pl.reStart + pl.open.length);
    this.debug('setting tail', re, pl);
    // maybe some even number of \, then maybe 1 \, followed by a |
    tail = tail.replace(/((?:\\{2}){0,64})(\\?)\|/g, function (_, $1, $2) {
      if (!$2) {
        // the | isn't already escaped, so escape it.
        $2 = '\\';
      }

      // need to escape all those slashes *again*, without escaping the
      // one that we need for escaping the | character.  As it works out,
      // escaping an even number of slashes can be done by simply repeating
      // it exactly after itself.  That's why this trick works.
      //
      // I am sorry that you have to see this.
      return $1 + $1 + $2 + '|'
    });

    this.debug('tail=%j\n   %s', tail, tail, pl, re);
    var t = pl.type === '*' ? star
      : pl.type === '?' ? qmark
      : '\\' + pl.type;

    hasMagic = true;
    re = re.slice(0, pl.reStart) + t + '\\(' + tail;
  }

  // handle trailing things that only matter at the very end.
  clearStateChar();
  if (escaping) {
    // trailing \\
    re += '\\\\';
  }

  // only need to apply the nodot start if the re starts with
  // something that could conceivably capture a dot
  var addPatternStart = false;
  switch (re.charAt(0)) {
    case '.':
    case '[':
    case '(': addPatternStart = true;
  }

  // Hack to work around lack of negative lookbehind in JS
  // A pattern like: *.!(x).!(y|z) needs to ensure that a name
  // like 'a.xyz.yz' doesn't match.  So, the first negative
  // lookahead, has to look ALL the way ahead, to the end of
  // the pattern.
  for (var n = negativeLists.length - 1; n > -1; n--) {
    var nl = negativeLists[n];

    var nlBefore = re.slice(0, nl.reStart);
    var nlFirst = re.slice(nl.reStart, nl.reEnd - 8);
    var nlLast = re.slice(nl.reEnd - 8, nl.reEnd);
    var nlAfter = re.slice(nl.reEnd);

    nlLast += nlAfter;

    // Handle nested stuff like *(*.js|!(*.json)), where open parens
    // mean that we should *not* include the ) in the bit that is considered
    // "after" the negated section.
    var openParensBefore = nlBefore.split('(').length - 1;
    var cleanAfter = nlAfter;
    for (i = 0; i < openParensBefore; i++) {
      cleanAfter = cleanAfter.replace(/\)[+*?]?/, '');
    }
    nlAfter = cleanAfter;

    var dollar = '';
    if (nlAfter === '' && isSub !== SUBPARSE) {
      dollar = '$';
    }
    var newRe = nlBefore + nlFirst + nlAfter + dollar + nlLast;
    re = newRe;
  }

  // if the re is not "" at this point, then we need to make sure
  // it doesn't match against an empty path part.
  // Otherwise a/* will match a/, which it should not.
  if (re !== '' && hasMagic) {
    re = '(?=.)' + re;
  }

  if (addPatternStart) {
    re = patternStart + re;
  }

  // parsing just a piece of a larger pattern.
  if (isSub === SUBPARSE) {
    return [re, hasMagic]
  }

  // skip the regexp for non-magical patterns
  // unescape anything in it, though, so that it'll be
  // an exact match against a file etc.
  if (!hasMagic) {
    return globUnescape(pattern)
  }

  var flags = options.nocase ? 'i' : '';
  try {
    var regExp = new RegExp('^' + re + '$', flags);
  } catch (er) {
    // If it was an invalid regular expression, then it can't match
    // anything.  This trick looks for a character after the end of
    // the string, which is of course impossible, except in multi-line
    // mode, but it's not a /m regex.
    return new RegExp('$.')
  }

  regExp._glob = pattern;
  regExp._src = re;

  return regExp
}

minimatch.makeRe = function (pattern, options) {
  return new Minimatch$1(pattern, options || {}).makeRe()
};

Minimatch$1.prototype.makeRe = makeRe;
function makeRe () {
  if (this.regexp || this.regexp === false) return this.regexp

  // at this point, this.set is a 2d array of partial
  // pattern strings, or "**".
  //
  // It's better to use .match().  This function shouldn't
  // be used, really, but it's pretty convenient sometimes,
  // when you just want to work with a regex.
  var set = this.set;

  if (!set.length) {
    this.regexp = false;
    return this.regexp
  }
  var options = this.options;

  var twoStar = options.noglobstar ? star
    : options.dot ? twoStarDot
    : twoStarNoDot;
  var flags = options.nocase ? 'i' : '';

  var re = set.map(function (pattern) {
    return pattern.map(function (p) {
      return (p === GLOBSTAR) ? twoStar
      : (typeof p === 'string') ? regExpEscape(p)
      : p._src
    }).join('\\\/')
  }).join('|');

  // must match entire pattern
  // ending in a * or ** will make it less strict.
  re = '^(?:' + re + ')$';

  // can match anything, as long as it's not this.
  if (this.negate) re = '^(?!' + re + ').*$';

  try {
    this.regexp = new RegExp(re, flags);
  } catch (ex) {
    this.regexp = false;
  }
  return this.regexp
}

minimatch.match = function (list, pattern, options) {
  options = options || {};
  var mm = new Minimatch$1(pattern, options);
  list = list.filter(function (f) {
    return mm.match(f)
  });
  if (mm.options.nonull && !list.length) {
    list.push(pattern);
  }
  return list
};

Minimatch$1.prototype.match = match;
function match (f, partial) {
  this.debug('match', f, this.pattern);
  // short-circuit in the case of busted things.
  // comments, etc.
  if (this.comment) return false
  if (this.empty) return f === ''

  if (f === '/' && partial) return true

  var options = this.options;

  // windows: need to use /, not \
  if (path.sep !== '/') {
    f = f.split(path.sep).join('/');
  }

  // treat the test path as a set of pathparts.
  f = f.split(slashSplit);
  this.debug(this.pattern, 'split', f);

  // just ONE of the pattern sets in this.set needs to match
  // in order for it to be valid.  If negating, then just one
  // match means that we have failed.
  // Either way, return on the first hit.

  var set = this.set;
  this.debug(this.pattern, 'set', set);

  // Find the basename of the path by looking for the last non-empty segment
  var filename;
  var i;
  for (i = f.length - 1; i >= 0; i--) {
    filename = f[i];
    if (filename) break
  }

  for (i = 0; i < set.length; i++) {
    var pattern = set[i];
    var file = f;
    if (options.matchBase && pattern.length === 1) {
      file = [filename];
    }
    var hit = this.matchOne(file, pattern, partial);
    if (hit) {
      if (options.flipNegate) return true
      return !this.negate
    }
  }

  // didn't get any hits.  this is success if it's a negative
  // pattern, failure otherwise.
  if (options.flipNegate) return false
  return this.negate
}

// set partial to true to test if, for example,
// "/a/b" matches the start of "/*/b/*/d"
// Partial means, if you run out of file before you run
// out of pattern, then that's fine, as long as all
// the parts match.
Minimatch$1.prototype.matchOne = function (file, pattern, partial) {
  var options = this.options;

  this.debug('matchOne',
    { 'this': this, file: file, pattern: pattern });

  this.debug('matchOne', file.length, pattern.length);

  for (var fi = 0,
      pi = 0,
      fl = file.length,
      pl = pattern.length
      ; (fi < fl) && (pi < pl)
      ; fi++, pi++) {
    this.debug('matchOne loop');
    var p = pattern[pi];
    var f = file[fi];

    this.debug(pattern, p, f);

    // should be impossible.
    // some invalid regexp stuff in the set.
    if (p === false) return false

    if (p === GLOBSTAR) {
      this.debug('GLOBSTAR', [pattern, p, f]);

      // "**"
      // a/**/b/**/c would match the following:
      // a/b/x/y/z/c
      // a/x/y/z/b/c
      // a/b/x/b/x/c
      // a/b/c
      // To do this, take the rest of the pattern after
      // the **, and see if it would match the file remainder.
      // If so, return success.
      // If not, the ** "swallows" a segment, and try again.
      // This is recursively awful.
      //
      // a/**/b/**/c matching a/b/x/y/z/c
      // - a matches a
      // - doublestar
      //   - matchOne(b/x/y/z/c, b/**/c)
      //     - b matches b
      //     - doublestar
      //       - matchOne(x/y/z/c, c) -> no
      //       - matchOne(y/z/c, c) -> no
      //       - matchOne(z/c, c) -> no
      //       - matchOne(c, c) yes, hit
      var fr = fi;
      var pr = pi + 1;
      if (pr === pl) {
        this.debug('** at the end');
        // a ** at the end will just swallow the rest.
        // We have found a match.
        // however, it will not swallow /.x, unless
        // options.dot is set.
        // . and .. are *never* matched by **, for explosively
        // exponential reasons.
        for (; fi < fl; fi++) {
          if (file[fi] === '.' || file[fi] === '..' ||
            (!options.dot && file[fi].charAt(0) === '.')) return false
        }
        return true
      }

      // ok, let's see if we can swallow whatever we can.
      while (fr < fl) {
        var swallowee = file[fr];

        this.debug('\nglobstar while', file, fr, pattern, pr, swallowee);

        // XXX remove this slice.  Just pass the start index.
        if (this.matchOne(file.slice(fr), pattern.slice(pr), partial)) {
          this.debug('globstar found match!', fr, fl, swallowee);
          // found a match.
          return true
        } else {
          // can't swallow "." or ".." ever.
          // can only swallow ".foo" when explicitly asked.
          if (swallowee === '.' || swallowee === '..' ||
            (!options.dot && swallowee.charAt(0) === '.')) {
            this.debug('dot detected!', file, fr, pattern, pr);
            break
          }

          // ** swallows a segment, and continue.
          this.debug('globstar swallow a segment, and continue');
          fr++;
        }
      }

      // no match was found.
      // However, in partial mode, we can't say this is necessarily over.
      // If there's more *pattern* left, then
      if (partial) {
        // ran out of file
        this.debug('\n>>> no match, partial?', file, fr, pattern, pr);
        if (fr === fl) return true
      }
      return false
    }

    // something other than **
    // non-magic patterns just have to match exactly
    // patterns with magic have been turned into regexps.
    var hit;
    if (typeof p === 'string') {
      if (options.nocase) {
        hit = f.toLowerCase() === p.toLowerCase();
      } else {
        hit = f === p;
      }
      this.debug('string match', p, f, hit);
    } else {
      hit = f.match(p);
      this.debug('pattern match', p, f, hit);
    }

    if (!hit) return false
  }

  // Note: ending in / means that we'll get a final ""
  // at the end of the pattern.  This can only match a
  // corresponding "" at the end of the file.
  // If the file ends in /, then it can only match a
  // a pattern that ends in /, unless the pattern just
  // doesn't have any more for it. But, a/b/ should *not*
  // match "a/b/*", even though "" matches against the
  // [^/]*? pattern, except in partial mode, where it might
  // simply not be reached yet.
  // However, a/b/ should still satisfy a/*

  // now either we fell off the end of the pattern, or we're done.
  if (fi === fl && pi === pl) {
    // ran out of pattern and filename at the same time.
    // an exact hit!
    return true
  } else if (fi === fl) {
    // ran out of file, but still had pattern left.
    // this is ok if we're doing the match as part of
    // a glob fs traversal.
    return partial
  } else if (pi === pl) {
    // ran out of pattern, still have file left.
    // this is only acceptable if we're on the very last
    // empty segment of a file with a trailing slash.
    // a/* should match a/b/
    var emptyFileEnd = (fi === fl - 1) && (file[fi] === '');
    return emptyFileEnd
  }

  // should be unreachable.
  throw new Error('wtf?')
};

// replace stuff like \* with *
function globUnescape (s) {
  return s.replace(/\\(.)/g, '$1')
}

function regExpEscape (s) {
  return s.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
}

var inherits_browser = createCommonjsModule(function (module) {
if (typeof Object.create === 'function') {
  // implementation from standard node.js 'util' module
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor;
      ctor.prototype = Object.create(superCtor.prototype, {
        constructor: {
          value: ctor,
          enumerable: false,
          writable: true,
          configurable: true
        }
      });
    }
  };
} else {
  // old school shim for old browsers
  module.exports = function inherits(ctor, superCtor) {
    if (superCtor) {
      ctor.super_ = superCtor;
      var TempCtor = function () {};
      TempCtor.prototype = superCtor.prototype;
      ctor.prototype = new TempCtor();
      ctor.prototype.constructor = ctor;
    }
  };
}
}, "/$$rollup_base$$/node_modules/inherits");

var inherits = createCommonjsModule(function (module) {
try {
  var util = require$$0__default['default'];
  /* istanbul ignore next */
  if (typeof util.inherits !== 'function') throw '';
  module.exports = util.inherits;
} catch (e) {
  /* istanbul ignore next */
  module.exports = inherits_browser;
}
}, "/$$rollup_base$$/node_modules/inherits");

function posix(path) {
	return path.charAt(0) === '/';
}

function win32(path) {
	// https://github.com/nodejs/node/blob/b3fcc245fb25539909ef1d5eaa01dbf92e168633/lib/path.js#L56
	var splitDeviceRe = /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/;
	var result = splitDeviceRe.exec(path);
	var device = result[1] || '';
	var isUnc = Boolean(device && device.charAt(1) !== ':');

	// UNC paths are always absolute
	return Boolean(result[2] || isUnc);
}

var pathIsAbsolute = process.platform === 'win32' ? win32 : posix;
var posix_1 = posix;
var win32_1 = win32;
pathIsAbsolute.posix = posix_1;
pathIsAbsolute.win32 = win32_1;

var setopts_1 = setopts$2;
var ownProp_1 = ownProp$2;
var makeAbs_1 = makeAbs;
var finish_1 = finish;
var mark_1 = mark;
var isIgnored_1 = isIgnored$2;
var childrenIgnored_1 = childrenIgnored$2;

function ownProp$2 (obj, field) {
  return Object.prototype.hasOwnProperty.call(obj, field)
}





var Minimatch = minimatch_1.Minimatch;

function alphasort (a, b) {
  return a.localeCompare(b, 'en')
}

function setupIgnores (self, options) {
  self.ignore = options.ignore || [];

  if (!Array.isArray(self.ignore))
    self.ignore = [self.ignore];

  if (self.ignore.length) {
    self.ignore = self.ignore.map(ignoreMap);
  }
}

// ignore patterns are always in dot:true mode.
function ignoreMap (pattern) {
  var gmatcher = null;
  if (pattern.slice(-3) === '/**') {
    var gpattern = pattern.replace(/(\/\*\*)+$/, '');
    gmatcher = new Minimatch(gpattern, { dot: true });
  }

  return {
    matcher: new Minimatch(pattern, { dot: true }),
    gmatcher: gmatcher
  }
}

function setopts$2 (self, pattern, options) {
  if (!options)
    options = {};

  // base-matching: just use globstar for that.
  if (options.matchBase && -1 === pattern.indexOf("/")) {
    if (options.noglobstar) {
      throw new Error("base matching requires globstar")
    }
    pattern = "**/" + pattern;
  }

  self.silent = !!options.silent;
  self.pattern = pattern;
  self.strict = options.strict !== false;
  self.realpath = !!options.realpath;
  self.realpathCache = options.realpathCache || Object.create(null);
  self.follow = !!options.follow;
  self.dot = !!options.dot;
  self.mark = !!options.mark;
  self.nodir = !!options.nodir;
  if (self.nodir)
    self.mark = true;
  self.sync = !!options.sync;
  self.nounique = !!options.nounique;
  self.nonull = !!options.nonull;
  self.nosort = !!options.nosort;
  self.nocase = !!options.nocase;
  self.stat = !!options.stat;
  self.noprocess = !!options.noprocess;
  self.absolute = !!options.absolute;
  self.fs = options.fs || fs__default['default'];

  self.maxLength = options.maxLength || Infinity;
  self.cache = options.cache || Object.create(null);
  self.statCache = options.statCache || Object.create(null);
  self.symlinks = options.symlinks || Object.create(null);

  setupIgnores(self, options);

  self.changedCwd = false;
  var cwd = process.cwd();
  if (!ownProp$2(options, "cwd"))
    self.cwd = cwd;
  else {
    self.cwd = path__default['default'].resolve(options.cwd);
    self.changedCwd = self.cwd !== cwd;
  }

  self.root = options.root || path__default['default'].resolve(self.cwd, "/");
  self.root = path__default['default'].resolve(self.root);
  if (process.platform === "win32")
    self.root = self.root.replace(/\\/g, "/");

  // TODO: is an absolute `cwd` supposed to be resolved against `root`?
  // e.g. { cwd: '/test', root: __dirname } === path.join(__dirname, '/test')
  self.cwdAbs = pathIsAbsolute(self.cwd) ? self.cwd : makeAbs(self, self.cwd);
  if (process.platform === "win32")
    self.cwdAbs = self.cwdAbs.replace(/\\/g, "/");
  self.nomount = !!options.nomount;

  // disable comments and negation in Minimatch.
  // Note that they are not supported in Glob itself anyway.
  options.nonegate = true;
  options.nocomment = true;

  self.minimatch = new Minimatch(pattern, options);
  self.options = self.minimatch.options;
}

function finish (self) {
  var nou = self.nounique;
  var all = nou ? [] : Object.create(null);

  for (var i = 0, l = self.matches.length; i < l; i ++) {
    var matches = self.matches[i];
    if (!matches || Object.keys(matches).length === 0) {
      if (self.nonull) {
        // do like the shell, and spit out the literal glob
        var literal = self.minimatch.globSet[i];
        if (nou)
          all.push(literal);
        else
          all[literal] = true;
      }
    } else {
      // had matches
      var m = Object.keys(matches);
      if (nou)
        all.push.apply(all, m);
      else
        m.forEach(function (m) {
          all[m] = true;
        });
    }
  }

  if (!nou)
    all = Object.keys(all);

  if (!self.nosort)
    all = all.sort(alphasort);

  // at *some* point we statted all of these
  if (self.mark) {
    for (var i = 0; i < all.length; i++) {
      all[i] = self._mark(all[i]);
    }
    if (self.nodir) {
      all = all.filter(function (e) {
        var notDir = !(/\/$/.test(e));
        var c = self.cache[e] || self.cache[makeAbs(self, e)];
        if (notDir && c)
          notDir = c !== 'DIR' && !Array.isArray(c);
        return notDir
      });
    }
  }

  if (self.ignore.length)
    all = all.filter(function(m) {
      return !isIgnored$2(self, m)
    });

  self.found = all;
}

function mark (self, p) {
  var abs = makeAbs(self, p);
  var c = self.cache[abs];
  var m = p;
  if (c) {
    var isDir = c === 'DIR' || Array.isArray(c);
    var slash = p.slice(-1) === '/';

    if (isDir && !slash)
      m += '/';
    else if (!isDir && slash)
      m = m.slice(0, -1);

    if (m !== p) {
      var mabs = makeAbs(self, m);
      self.statCache[mabs] = self.statCache[abs];
      self.cache[mabs] = self.cache[abs];
    }
  }

  return m
}

// lotta situps...
function makeAbs (self, f) {
  var abs = f;
  if (f.charAt(0) === '/') {
    abs = path__default['default'].join(self.root, f);
  } else if (pathIsAbsolute(f) || f === '') {
    abs = f;
  } else if (self.changedCwd) {
    abs = path__default['default'].resolve(self.cwd, f);
  } else {
    abs = path__default['default'].resolve(f);
  }

  if (process.platform === 'win32')
    abs = abs.replace(/\\/g, '/');

  return abs
}


// Return true, if pattern ends with globstar '**', for the accompanying parent directory.
// Ex:- If node_modules/** is the pattern, add 'node_modules' to ignore list along with it's contents
function isIgnored$2 (self, path) {
  if (!self.ignore.length)
    return false

  return self.ignore.some(function(item) {
    return item.matcher.match(path) || !!(item.gmatcher && item.gmatcher.match(path))
  })
}

function childrenIgnored$2 (self, path) {
  if (!self.ignore.length)
    return false

  return self.ignore.some(function(item) {
    return !!(item.gmatcher && item.gmatcher.match(path))
  })
}

var common = {
	setopts: setopts_1,
	ownProp: ownProp_1,
	makeAbs: makeAbs_1,
	finish: finish_1,
	mark: mark_1,
	isIgnored: isIgnored_1,
	childrenIgnored: childrenIgnored_1
};

var require$$2 = glob_1;

var sync = globSync;
globSync.GlobSync = GlobSync$1;
require$$2.Glob;





var setopts$1 = common.setopts;
var ownProp$1 = common.ownProp;
var childrenIgnored$1 = common.childrenIgnored;
var isIgnored$1 = common.isIgnored;

function globSync (pattern, options) {
  if (typeof options === 'function' || arguments.length === 3)
    throw new TypeError('callback provided to sync glob\n'+
                        'See: https://github.com/isaacs/node-glob/issues/167')

  return new GlobSync$1(pattern, options).found
}

function GlobSync$1 (pattern, options) {
  if (!pattern)
    throw new Error('must provide pattern')

  if (typeof options === 'function' || arguments.length === 3)
    throw new TypeError('callback provided to sync glob\n'+
                        'See: https://github.com/isaacs/node-glob/issues/167')

  if (!(this instanceof GlobSync$1))
    return new GlobSync$1(pattern, options)

  setopts$1(this, pattern, options);

  if (this.noprocess)
    return this

  var n = this.minimatch.set.length;
  this.matches = new Array(n);
  for (var i = 0; i < n; i ++) {
    this._process(this.minimatch.set[i], i, false);
  }
  this._finish();
}

GlobSync$1.prototype._finish = function () {
  assert__default['default'](this instanceof GlobSync$1);
  if (this.realpath) {
    var self = this;
    this.matches.forEach(function (matchset, index) {
      var set = self.matches[index] = Object.create(null);
      for (var p in matchset) {
        try {
          p = self._makeAbs(p);
          var real = fs_realpath.realpathSync(p, self.realpathCache);
          set[real] = true;
        } catch (er) {
          if (er.syscall === 'stat')
            set[self._makeAbs(p)] = true;
          else
            throw er
        }
      }
    });
  }
  common.finish(this);
};


GlobSync$1.prototype._process = function (pattern, index, inGlobStar) {
  assert__default['default'](this instanceof GlobSync$1);

  // Get the first [n] parts of pattern that are all strings.
  var n = 0;
  while (typeof pattern[n] === 'string') {
    n ++;
  }
  // now n is the index of the first one that is *not* a string.

  // See if there's anything else
  var prefix;
  switch (n) {
    // if not, then this is rather simple
    case pattern.length:
      this._processSimple(pattern.join('/'), index);
      return

    case 0:
      // pattern *starts* with some non-trivial item.
      // going to readdir(cwd), but not include the prefix in matches.
      prefix = null;
      break

    default:
      // pattern has some string bits in the front.
      // whatever it starts with, whether that's 'absolute' like /foo/bar,
      // or 'relative' like '../baz'
      prefix = pattern.slice(0, n).join('/');
      break
  }

  var remain = pattern.slice(n);

  // get the list of entries.
  var read;
  if (prefix === null)
    read = '.';
  else if (pathIsAbsolute(prefix) || pathIsAbsolute(pattern.join('/'))) {
    if (!prefix || !pathIsAbsolute(prefix))
      prefix = '/' + prefix;
    read = prefix;
  } else
    read = prefix;

  var abs = this._makeAbs(read);

  //if ignored, skip processing
  if (childrenIgnored$1(this, read))
    return

  var isGlobStar = remain[0] === minimatch_1.GLOBSTAR;
  if (isGlobStar)
    this._processGlobStar(prefix, read, abs, remain, index, inGlobStar);
  else
    this._processReaddir(prefix, read, abs, remain, index, inGlobStar);
};


GlobSync$1.prototype._processReaddir = function (prefix, read, abs, remain, index, inGlobStar) {
  var entries = this._readdir(abs, inGlobStar);

  // if the abs isn't a dir, then nothing can match!
  if (!entries)
    return

  // It will only match dot entries if it starts with a dot, or if
  // dot is set.  Stuff like @(.foo|.bar) isn't allowed.
  var pn = remain[0];
  var negate = !!this.minimatch.negate;
  var rawGlob = pn._glob;
  var dotOk = this.dot || rawGlob.charAt(0) === '.';

  var matchedEntries = [];
  for (var i = 0; i < entries.length; i++) {
    var e = entries[i];
    if (e.charAt(0) !== '.' || dotOk) {
      var m;
      if (negate && !prefix) {
        m = !e.match(pn);
      } else {
        m = e.match(pn);
      }
      if (m)
        matchedEntries.push(e);
    }
  }

  var len = matchedEntries.length;
  // If there are no matched entries, then nothing matches.
  if (len === 0)
    return

  // if this is the last remaining pattern bit, then no need for
  // an additional stat *unless* the user has specified mark or
  // stat explicitly.  We know they exist, since readdir returned
  // them.

  if (remain.length === 1 && !this.mark && !this.stat) {
    if (!this.matches[index])
      this.matches[index] = Object.create(null);

    for (var i = 0; i < len; i ++) {
      var e = matchedEntries[i];
      if (prefix) {
        if (prefix.slice(-1) !== '/')
          e = prefix + '/' + e;
        else
          e = prefix + e;
      }

      if (e.charAt(0) === '/' && !this.nomount) {
        e = path__default['default'].join(this.root, e);
      }
      this._emitMatch(index, e);
    }
    // This was the last one, and no stats were needed
    return
  }

  // now test all matched entries as stand-ins for that part
  // of the pattern.
  remain.shift();
  for (var i = 0; i < len; i ++) {
    var e = matchedEntries[i];
    var newPattern;
    if (prefix)
      newPattern = [prefix, e];
    else
      newPattern = [e];
    this._process(newPattern.concat(remain), index, inGlobStar);
  }
};


GlobSync$1.prototype._emitMatch = function (index, e) {
  if (isIgnored$1(this, e))
    return

  var abs = this._makeAbs(e);

  if (this.mark)
    e = this._mark(e);

  if (this.absolute) {
    e = abs;
  }

  if (this.matches[index][e])
    return

  if (this.nodir) {
    var c = this.cache[abs];
    if (c === 'DIR' || Array.isArray(c))
      return
  }

  this.matches[index][e] = true;

  if (this.stat)
    this._stat(e);
};


GlobSync$1.prototype._readdirInGlobStar = function (abs) {
  // follow all symlinked directories forever
  // just proceed as if this is a non-globstar situation
  if (this.follow)
    return this._readdir(abs, false)

  var entries;
  var lstat;
  try {
    lstat = this.fs.lstatSync(abs);
  } catch (er) {
    if (er.code === 'ENOENT') {
      // lstat failed, doesn't exist
      return null
    }
  }

  var isSym = lstat && lstat.isSymbolicLink();
  this.symlinks[abs] = isSym;

  // If it's not a symlink or a dir, then it's definitely a regular file.
  // don't bother doing a readdir in that case.
  if (!isSym && lstat && !lstat.isDirectory())
    this.cache[abs] = 'FILE';
  else
    entries = this._readdir(abs, false);

  return entries
};

GlobSync$1.prototype._readdir = function (abs, inGlobStar) {

  if (inGlobStar && !ownProp$1(this.symlinks, abs))
    return this._readdirInGlobStar(abs)

  if (ownProp$1(this.cache, abs)) {
    var c = this.cache[abs];
    if (!c || c === 'FILE')
      return null

    if (Array.isArray(c))
      return c
  }

  try {
    return this._readdirEntries(abs, this.fs.readdirSync(abs))
  } catch (er) {
    this._readdirError(abs, er);
    return null
  }
};

GlobSync$1.prototype._readdirEntries = function (abs, entries) {
  // if we haven't asked to stat everything, then just
  // assume that everything in there exists, so we can avoid
  // having to stat it a second time.
  if (!this.mark && !this.stat) {
    for (var i = 0; i < entries.length; i ++) {
      var e = entries[i];
      if (abs === '/')
        e = abs + e;
      else
        e = abs + '/' + e;
      this.cache[e] = true;
    }
  }

  this.cache[abs] = entries;

  // mark and cache dir-ness
  return entries
};

GlobSync$1.prototype._readdirError = function (f, er) {
  // handle errors, and cache the information
  switch (er.code) {
    case 'ENOTSUP': // https://github.com/isaacs/node-glob/issues/205
    case 'ENOTDIR': // totally normal. means it *does* exist.
      var abs = this._makeAbs(f);
      this.cache[abs] = 'FILE';
      if (abs === this.cwdAbs) {
        var error = new Error(er.code + ' invalid cwd ' + this.cwd);
        error.path = this.cwd;
        error.code = er.code;
        throw error
      }
      break

    case 'ENOENT': // not terribly unusual
    case 'ELOOP':
    case 'ENAMETOOLONG':
    case 'UNKNOWN':
      this.cache[this._makeAbs(f)] = false;
      break

    default: // some unusual error.  Treat as failure.
      this.cache[this._makeAbs(f)] = false;
      if (this.strict)
        throw er
      if (!this.silent)
        console.error('glob error', er);
      break
  }
};

GlobSync$1.prototype._processGlobStar = function (prefix, read, abs, remain, index, inGlobStar) {

  var entries = this._readdir(abs, inGlobStar);

  // no entries means not a dir, so it can never have matches
  // foo.txt/** doesn't match foo.txt
  if (!entries)
    return

  // test without the globstar, and with every child both below
  // and replacing the globstar.
  var remainWithoutGlobStar = remain.slice(1);
  var gspref = prefix ? [ prefix ] : [];
  var noGlobStar = gspref.concat(remainWithoutGlobStar);

  // the noGlobStar pattern exits the inGlobStar state
  this._process(noGlobStar, index, false);

  var len = entries.length;
  var isSym = this.symlinks[abs];

  // If it's a symlink, and we're in a globstar, then stop
  if (isSym && inGlobStar)
    return

  for (var i = 0; i < len; i++) {
    var e = entries[i];
    if (e.charAt(0) === '.' && !this.dot)
      continue

    // these two cases enter the inGlobStar state
    var instead = gspref.concat(entries[i], remainWithoutGlobStar);
    this._process(instead, index, true);

    var below = gspref.concat(entries[i], remain);
    this._process(below, index, true);
  }
};

GlobSync$1.prototype._processSimple = function (prefix, index) {
  // XXX review this.  Shouldn't it be doing the mounting etc
  // before doing stat?  kinda weird?
  var exists = this._stat(prefix);

  if (!this.matches[index])
    this.matches[index] = Object.create(null);

  // If it doesn't exist, then just mark the lack of results
  if (!exists)
    return

  if (prefix && pathIsAbsolute(prefix) && !this.nomount) {
    var trail = /[\/\\]$/.test(prefix);
    if (prefix.charAt(0) === '/') {
      prefix = path__default['default'].join(this.root, prefix);
    } else {
      prefix = path__default['default'].resolve(this.root, prefix);
      if (trail)
        prefix += '/';
    }
  }

  if (process.platform === 'win32')
    prefix = prefix.replace(/\\/g, '/');

  // Mark this as a match
  this._emitMatch(index, prefix);
};

// Returns either 'DIR', 'FILE', or false
GlobSync$1.prototype._stat = function (f) {
  var abs = this._makeAbs(f);
  var needDir = f.slice(-1) === '/';

  if (f.length > this.maxLength)
    return false

  if (!this.stat && ownProp$1(this.cache, abs)) {
    var c = this.cache[abs];

    if (Array.isArray(c))
      c = 'DIR';

    // It exists, but maybe not how we need it
    if (!needDir || c === 'DIR')
      return c

    if (needDir && c === 'FILE')
      return false

    // otherwise we have to stat, because maybe c=true
    // if we know it exists, but not what it is.
  }
  var stat = this.statCache[abs];
  if (!stat) {
    var lstat;
    try {
      lstat = this.fs.lstatSync(abs);
    } catch (er) {
      if (er && (er.code === 'ENOENT' || er.code === 'ENOTDIR')) {
        this.statCache[abs] = false;
        return false
      }
    }

    if (lstat && lstat.isSymbolicLink()) {
      try {
        stat = this.fs.statSync(abs);
      } catch (er) {
        stat = lstat;
      }
    } else {
      stat = lstat;
    }
  }

  this.statCache[abs] = stat;

  var c = true;
  if (stat)
    c = stat.isDirectory() ? 'DIR' : 'FILE';

  this.cache[abs] = this.cache[abs] || c;

  if (needDir && c === 'FILE')
    return false

  return c
};

GlobSync$1.prototype._mark = function (p) {
  return common.mark(this, p)
};

GlobSync$1.prototype._makeAbs = function (f) {
  return common.makeAbs(this, f)
};

// Returns a wrapper function that returns a wrapped callback
// The wrapper function should do some stuff, and return a
// presumably different callback function.
// This makes sure that own properties are retained, so that
// decorations and such are not lost along the way.
var wrappy_1 = wrappy;
function wrappy (fn, cb) {
  if (fn && cb) return wrappy(fn)(cb)

  if (typeof fn !== 'function')
    throw new TypeError('need wrapper function')

  Object.keys(fn).forEach(function (k) {
    wrapper[k] = fn[k];
  });

  return wrapper

  function wrapper() {
    var args = new Array(arguments.length);
    for (var i = 0; i < args.length; i++) {
      args[i] = arguments[i];
    }
    var ret = fn.apply(this, args);
    var cb = args[args.length-1];
    if (typeof ret === 'function' && ret !== cb) {
      Object.keys(cb).forEach(function (k) {
        ret[k] = cb[k];
      });
    }
    return ret
  }
}

var once_1 = wrappy_1(once);
var strict = wrappy_1(onceStrict);

once.proto = once(function () {
  Object.defineProperty(Function.prototype, 'once', {
    value: function () {
      return once(this)
    },
    configurable: true
  });

  Object.defineProperty(Function.prototype, 'onceStrict', {
    value: function () {
      return onceStrict(this)
    },
    configurable: true
  });
});

function once (fn) {
  var f = function () {
    if (f.called) return f.value
    f.called = true;
    return f.value = fn.apply(this, arguments)
  };
  f.called = false;
  return f
}

function onceStrict (fn) {
  var f = function () {
    if (f.called)
      throw new Error(f.onceError)
    f.called = true;
    return f.value = fn.apply(this, arguments)
  };
  var name = fn.name || 'Function wrapped with `once`';
  f.onceError = name + " shouldn't be called more than once";
  f.called = false;
  return f
}
once_1.strict = strict;

var reqs = Object.create(null);


var inflight_1 = wrappy_1(inflight);

function inflight (key, cb) {
  if (reqs[key]) {
    reqs[key].push(cb);
    return null
  } else {
    reqs[key] = [cb];
    return makeres(key)
  }
}

function makeres (key) {
  return once_1(function RES () {
    var cbs = reqs[key];
    var len = cbs.length;
    var args = slice(arguments);

    // XXX It's somewhat ambiguous whether a new callback added in this
    // pass should be queued for later execution if something in the
    // list of callbacks throws, or if it should just be discarded.
    // However, it's such an edge case that it hardly matters, and either
    // choice is likely as surprising as the other.
    // As it happens, we do go ahead and schedule it for later execution.
    try {
      for (var i = 0; i < len; i++) {
        cbs[i].apply(null, args);
      }
    } finally {
      if (cbs.length > len) {
        // added more in the interim.
        // de-zalgo, just in case, but don't call again.
        cbs.splice(0, len);
        process.nextTick(function () {
          RES.apply(null, args);
        });
      } else {
        delete reqs[key];
      }
    }
  })
}

function slice (args) {
  var length = args.length;
  var array = [];

  for (var i = 0; i < length; i++) array[i] = args[i];
  return array
}

// Approach:
//
// 1. Get the minimatch set
// 2. For each pattern in the set, PROCESS(pattern, false)
// 3. Store matches per-set, then uniq them
//
// PROCESS(pattern, inGlobStar)
// Get the first [n] items from pattern that are all strings
// Join these together.  This is PREFIX.
//   If there is no more remaining, then stat(PREFIX) and
//   add to matches if it succeeds.  END.
//
// If inGlobStar and PREFIX is symlink and points to dir
//   set ENTRIES = []
// else readdir(PREFIX) as ENTRIES
//   If fail, END
//
// with ENTRIES
//   If pattern[n] is GLOBSTAR
//     // handle the case where the globstar match is empty
//     // by pruning it out, and testing the resulting pattern
//     PROCESS(pattern[0..n] + pattern[n+1 .. $], false)
//     // handle other cases.
//     for ENTRY in ENTRIES (not dotfiles)
//       // attach globstar + tail onto the entry
//       // Mark that this entry is a globstar match
//       PROCESS(pattern[0..n] + ENTRY + pattern[n .. $], true)
//
//   else // not globstar
//     for ENTRY in ENTRIES (not dotfiles, unless pattern[n] is dot)
//       Test ENTRY against pattern[n]
//       If fails, continue
//       If passes, PROCESS(pattern[0..n] + item + pattern[n+1 .. $])
//
// Caveat:
//   Cache all stats and readdirs results to minimize syscall.  Since all
//   we ever care about is existence and directory-ness, we can just keep
//   `true` for files, and [children,...] for directories, or `false` for
//   things that don't exist.

var glob_1 = glob;

var EE = require$$0__default$1['default'].EventEmitter;





var setopts = common.setopts;
var ownProp = common.ownProp;


var childrenIgnored = common.childrenIgnored;
var isIgnored = common.isIgnored;



function glob (pattern, options, cb) {
  if (typeof options === 'function') cb = options, options = {};
  if (!options) options = {};

  if (options.sync) {
    if (cb)
      throw new TypeError('callback provided to sync glob')
    return sync(pattern, options)
  }

  return new Glob(pattern, options, cb)
}

glob.sync = sync;
var GlobSync = glob.GlobSync = sync.GlobSync;

// old api surface
glob.glob = glob;

function extend (origin, add) {
  if (add === null || typeof add !== 'object') {
    return origin
  }

  var keys = Object.keys(add);
  var i = keys.length;
  while (i--) {
    origin[keys[i]] = add[keys[i]];
  }
  return origin
}

glob.hasMagic = function (pattern, options_) {
  var options = extend({}, options_);
  options.noprocess = true;

  var g = new Glob(pattern, options);
  var set = g.minimatch.set;

  if (!pattern)
    return false

  if (set.length > 1)
    return true

  for (var j = 0; j < set[0].length; j++) {
    if (typeof set[0][j] !== 'string')
      return true
  }

  return false
};

glob.Glob = Glob;
inherits(Glob, EE);
function Glob (pattern, options, cb) {
  if (typeof options === 'function') {
    cb = options;
    options = null;
  }

  if (options && options.sync) {
    if (cb)
      throw new TypeError('callback provided to sync glob')
    return new GlobSync(pattern, options)
  }

  if (!(this instanceof Glob))
    return new Glob(pattern, options, cb)

  setopts(this, pattern, options);
  this._didRealPath = false;

  // process each pattern in the minimatch set
  var n = this.minimatch.set.length;

  // The matches are stored as {<filename>: true,...} so that
  // duplicates are automagically pruned.
  // Later, we do an Object.keys() on these.
  // Keep them as a list so we can fill in when nonull is set.
  this.matches = new Array(n);

  if (typeof cb === 'function') {
    cb = once_1(cb);
    this.on('error', cb);
    this.on('end', function (matches) {
      cb(null, matches);
    });
  }

  var self = this;
  this._processing = 0;

  this._emitQueue = [];
  this._processQueue = [];
  this.paused = false;

  if (this.noprocess)
    return this

  if (n === 0)
    return done()

  var sync = true;
  for (var i = 0; i < n; i ++) {
    this._process(this.minimatch.set[i], i, false, done);
  }
  sync = false;

  function done () {
    --self._processing;
    if (self._processing <= 0) {
      if (sync) {
        process.nextTick(function () {
          self._finish();
        });
      } else {
        self._finish();
      }
    }
  }
}

Glob.prototype._finish = function () {
  assert__default['default'](this instanceof Glob);
  if (this.aborted)
    return

  if (this.realpath && !this._didRealpath)
    return this._realpath()

  common.finish(this);
  this.emit('end', this.found);
};

Glob.prototype._realpath = function () {
  if (this._didRealpath)
    return

  this._didRealpath = true;

  var n = this.matches.length;
  if (n === 0)
    return this._finish()

  var self = this;
  for (var i = 0; i < this.matches.length; i++)
    this._realpathSet(i, next);

  function next () {
    if (--n === 0)
      self._finish();
  }
};

Glob.prototype._realpathSet = function (index, cb) {
  var matchset = this.matches[index];
  if (!matchset)
    return cb()

  var found = Object.keys(matchset);
  var self = this;
  var n = found.length;

  if (n === 0)
    return cb()

  var set = this.matches[index] = Object.create(null);
  found.forEach(function (p, i) {
    // If there's a problem with the stat, then it means that
    // one or more of the links in the realpath couldn't be
    // resolved.  just return the abs value in that case.
    p = self._makeAbs(p);
    fs_realpath.realpath(p, self.realpathCache, function (er, real) {
      if (!er)
        set[real] = true;
      else if (er.syscall === 'stat')
        set[p] = true;
      else
        self.emit('error', er); // srsly wtf right here

      if (--n === 0) {
        self.matches[index] = set;
        cb();
      }
    });
  });
};

Glob.prototype._mark = function (p) {
  return common.mark(this, p)
};

Glob.prototype._makeAbs = function (f) {
  return common.makeAbs(this, f)
};

Glob.prototype.abort = function () {
  this.aborted = true;
  this.emit('abort');
};

Glob.prototype.pause = function () {
  if (!this.paused) {
    this.paused = true;
    this.emit('pause');
  }
};

Glob.prototype.resume = function () {
  if (this.paused) {
    this.emit('resume');
    this.paused = false;
    if (this._emitQueue.length) {
      var eq = this._emitQueue.slice(0);
      this._emitQueue.length = 0;
      for (var i = 0; i < eq.length; i ++) {
        var e = eq[i];
        this._emitMatch(e[0], e[1]);
      }
    }
    if (this._processQueue.length) {
      var pq = this._processQueue.slice(0);
      this._processQueue.length = 0;
      for (var i = 0; i < pq.length; i ++) {
        var p = pq[i];
        this._processing--;
        this._process(p[0], p[1], p[2], p[3]);
      }
    }
  }
};

Glob.prototype._process = function (pattern, index, inGlobStar, cb) {
  assert__default['default'](this instanceof Glob);
  assert__default['default'](typeof cb === 'function');

  if (this.aborted)
    return

  this._processing++;
  if (this.paused) {
    this._processQueue.push([pattern, index, inGlobStar, cb]);
    return
  }

  //console.error('PROCESS %d', this._processing, pattern)

  // Get the first [n] parts of pattern that are all strings.
  var n = 0;
  while (typeof pattern[n] === 'string') {
    n ++;
  }
  // now n is the index of the first one that is *not* a string.

  // see if there's anything else
  var prefix;
  switch (n) {
    // if not, then this is rather simple
    case pattern.length:
      this._processSimple(pattern.join('/'), index, cb);
      return

    case 0:
      // pattern *starts* with some non-trivial item.
      // going to readdir(cwd), but not include the prefix in matches.
      prefix = null;
      break

    default:
      // pattern has some string bits in the front.
      // whatever it starts with, whether that's 'absolute' like /foo/bar,
      // or 'relative' like '../baz'
      prefix = pattern.slice(0, n).join('/');
      break
  }

  var remain = pattern.slice(n);

  // get the list of entries.
  var read;
  if (prefix === null)
    read = '.';
  else if (pathIsAbsolute(prefix) || pathIsAbsolute(pattern.join('/'))) {
    if (!prefix || !pathIsAbsolute(prefix))
      prefix = '/' + prefix;
    read = prefix;
  } else
    read = prefix;

  var abs = this._makeAbs(read);

  //if ignored, skip _processing
  if (childrenIgnored(this, read))
    return cb()

  var isGlobStar = remain[0] === minimatch_1.GLOBSTAR;
  if (isGlobStar)
    this._processGlobStar(prefix, read, abs, remain, index, inGlobStar, cb);
  else
    this._processReaddir(prefix, read, abs, remain, index, inGlobStar, cb);
};

Glob.prototype._processReaddir = function (prefix, read, abs, remain, index, inGlobStar, cb) {
  var self = this;
  this._readdir(abs, inGlobStar, function (er, entries) {
    return self._processReaddir2(prefix, read, abs, remain, index, inGlobStar, entries, cb)
  });
};

Glob.prototype._processReaddir2 = function (prefix, read, abs, remain, index, inGlobStar, entries, cb) {

  // if the abs isn't a dir, then nothing can match!
  if (!entries)
    return cb()

  // It will only match dot entries if it starts with a dot, or if
  // dot is set.  Stuff like @(.foo|.bar) isn't allowed.
  var pn = remain[0];
  var negate = !!this.minimatch.negate;
  var rawGlob = pn._glob;
  var dotOk = this.dot || rawGlob.charAt(0) === '.';

  var matchedEntries = [];
  for (var i = 0; i < entries.length; i++) {
    var e = entries[i];
    if (e.charAt(0) !== '.' || dotOk) {
      var m;
      if (negate && !prefix) {
        m = !e.match(pn);
      } else {
        m = e.match(pn);
      }
      if (m)
        matchedEntries.push(e);
    }
  }

  //console.error('prd2', prefix, entries, remain[0]._glob, matchedEntries)

  var len = matchedEntries.length;
  // If there are no matched entries, then nothing matches.
  if (len === 0)
    return cb()

  // if this is the last remaining pattern bit, then no need for
  // an additional stat *unless* the user has specified mark or
  // stat explicitly.  We know they exist, since readdir returned
  // them.

  if (remain.length === 1 && !this.mark && !this.stat) {
    if (!this.matches[index])
      this.matches[index] = Object.create(null);

    for (var i = 0; i < len; i ++) {
      var e = matchedEntries[i];
      if (prefix) {
        if (prefix !== '/')
          e = prefix + '/' + e;
        else
          e = prefix + e;
      }

      if (e.charAt(0) === '/' && !this.nomount) {
        e = path__default['default'].join(this.root, e);
      }
      this._emitMatch(index, e);
    }
    // This was the last one, and no stats were needed
    return cb()
  }

  // now test all matched entries as stand-ins for that part
  // of the pattern.
  remain.shift();
  for (var i = 0; i < len; i ++) {
    var e = matchedEntries[i];
    if (prefix) {
      if (prefix !== '/')
        e = prefix + '/' + e;
      else
        e = prefix + e;
    }
    this._process([e].concat(remain), index, inGlobStar, cb);
  }
  cb();
};

Glob.prototype._emitMatch = function (index, e) {
  if (this.aborted)
    return

  if (isIgnored(this, e))
    return

  if (this.paused) {
    this._emitQueue.push([index, e]);
    return
  }

  var abs = pathIsAbsolute(e) ? e : this._makeAbs(e);

  if (this.mark)
    e = this._mark(e);

  if (this.absolute)
    e = abs;

  if (this.matches[index][e])
    return

  if (this.nodir) {
    var c = this.cache[abs];
    if (c === 'DIR' || Array.isArray(c))
      return
  }

  this.matches[index][e] = true;

  var st = this.statCache[abs];
  if (st)
    this.emit('stat', e, st);

  this.emit('match', e);
};

Glob.prototype._readdirInGlobStar = function (abs, cb) {
  if (this.aborted)
    return

  // follow all symlinked directories forever
  // just proceed as if this is a non-globstar situation
  if (this.follow)
    return this._readdir(abs, false, cb)

  var lstatkey = 'lstat\0' + abs;
  var self = this;
  var lstatcb = inflight_1(lstatkey, lstatcb_);

  if (lstatcb)
    self.fs.lstat(abs, lstatcb);

  function lstatcb_ (er, lstat) {
    if (er && er.code === 'ENOENT')
      return cb()

    var isSym = lstat && lstat.isSymbolicLink();
    self.symlinks[abs] = isSym;

    // If it's not a symlink or a dir, then it's definitely a regular file.
    // don't bother doing a readdir in that case.
    if (!isSym && lstat && !lstat.isDirectory()) {
      self.cache[abs] = 'FILE';
      cb();
    } else
      self._readdir(abs, false, cb);
  }
};

Glob.prototype._readdir = function (abs, inGlobStar, cb) {
  if (this.aborted)
    return

  cb = inflight_1('readdir\0'+abs+'\0'+inGlobStar, cb);
  if (!cb)
    return

  //console.error('RD %j %j', +inGlobStar, abs)
  if (inGlobStar && !ownProp(this.symlinks, abs))
    return this._readdirInGlobStar(abs, cb)

  if (ownProp(this.cache, abs)) {
    var c = this.cache[abs];
    if (!c || c === 'FILE')
      return cb()

    if (Array.isArray(c))
      return cb(null, c)
  }

  var self = this;
  self.fs.readdir(abs, readdirCb(this, abs, cb));
};

function readdirCb (self, abs, cb) {
  return function (er, entries) {
    if (er)
      self._readdirError(abs, er, cb);
    else
      self._readdirEntries(abs, entries, cb);
  }
}

Glob.prototype._readdirEntries = function (abs, entries, cb) {
  if (this.aborted)
    return

  // if we haven't asked to stat everything, then just
  // assume that everything in there exists, so we can avoid
  // having to stat it a second time.
  if (!this.mark && !this.stat) {
    for (var i = 0; i < entries.length; i ++) {
      var e = entries[i];
      if (abs === '/')
        e = abs + e;
      else
        e = abs + '/' + e;
      this.cache[e] = true;
    }
  }

  this.cache[abs] = entries;
  return cb(null, entries)
};

Glob.prototype._readdirError = function (f, er, cb) {
  if (this.aborted)
    return

  // handle errors, and cache the information
  switch (er.code) {
    case 'ENOTSUP': // https://github.com/isaacs/node-glob/issues/205
    case 'ENOTDIR': // totally normal. means it *does* exist.
      var abs = this._makeAbs(f);
      this.cache[abs] = 'FILE';
      if (abs === this.cwdAbs) {
        var error = new Error(er.code + ' invalid cwd ' + this.cwd);
        error.path = this.cwd;
        error.code = er.code;
        this.emit('error', error);
        this.abort();
      }
      break

    case 'ENOENT': // not terribly unusual
    case 'ELOOP':
    case 'ENAMETOOLONG':
    case 'UNKNOWN':
      this.cache[this._makeAbs(f)] = false;
      break

    default: // some unusual error.  Treat as failure.
      this.cache[this._makeAbs(f)] = false;
      if (this.strict) {
        this.emit('error', er);
        // If the error is handled, then we abort
        // if not, we threw out of here
        this.abort();
      }
      if (!this.silent)
        console.error('glob error', er);
      break
  }

  return cb()
};

Glob.prototype._processGlobStar = function (prefix, read, abs, remain, index, inGlobStar, cb) {
  var self = this;
  this._readdir(abs, inGlobStar, function (er, entries) {
    self._processGlobStar2(prefix, read, abs, remain, index, inGlobStar, entries, cb);
  });
};


Glob.prototype._processGlobStar2 = function (prefix, read, abs, remain, index, inGlobStar, entries, cb) {
  //console.error('pgs2', prefix, remain[0], entries)

  // no entries means not a dir, so it can never have matches
  // foo.txt/** doesn't match foo.txt
  if (!entries)
    return cb()

  // test without the globstar, and with every child both below
  // and replacing the globstar.
  var remainWithoutGlobStar = remain.slice(1);
  var gspref = prefix ? [ prefix ] : [];
  var noGlobStar = gspref.concat(remainWithoutGlobStar);

  // the noGlobStar pattern exits the inGlobStar state
  this._process(noGlobStar, index, false, cb);

  var isSym = this.symlinks[abs];
  var len = entries.length;

  // If it's a symlink, and we're in a globstar, then stop
  if (isSym && inGlobStar)
    return cb()

  for (var i = 0; i < len; i++) {
    var e = entries[i];
    if (e.charAt(0) === '.' && !this.dot)
      continue

    // these two cases enter the inGlobStar state
    var instead = gspref.concat(entries[i], remainWithoutGlobStar);
    this._process(instead, index, true, cb);

    var below = gspref.concat(entries[i], remain);
    this._process(below, index, true, cb);
  }

  cb();
};

Glob.prototype._processSimple = function (prefix, index, cb) {
  // XXX review this.  Shouldn't it be doing the mounting etc
  // before doing stat?  kinda weird?
  var self = this;
  this._stat(prefix, function (er, exists) {
    self._processSimple2(prefix, index, er, exists, cb);
  });
};
Glob.prototype._processSimple2 = function (prefix, index, er, exists, cb) {

  //console.error('ps2', prefix, exists)

  if (!this.matches[index])
    this.matches[index] = Object.create(null);

  // If it doesn't exist, then just mark the lack of results
  if (!exists)
    return cb()

  if (prefix && pathIsAbsolute(prefix) && !this.nomount) {
    var trail = /[\/\\]$/.test(prefix);
    if (prefix.charAt(0) === '/') {
      prefix = path__default['default'].join(this.root, prefix);
    } else {
      prefix = path__default['default'].resolve(this.root, prefix);
      if (trail)
        prefix += '/';
    }
  }

  if (process.platform === 'win32')
    prefix = prefix.replace(/\\/g, '/');

  // Mark this as a match
  this._emitMatch(index, prefix);
  cb();
};

// Returns either 'DIR', 'FILE', or false
Glob.prototype._stat = function (f, cb) {
  var abs = this._makeAbs(f);
  var needDir = f.slice(-1) === '/';

  if (f.length > this.maxLength)
    return cb()

  if (!this.stat && ownProp(this.cache, abs)) {
    var c = this.cache[abs];

    if (Array.isArray(c))
      c = 'DIR';

    // It exists, but maybe not how we need it
    if (!needDir || c === 'DIR')
      return cb(null, c)

    if (needDir && c === 'FILE')
      return cb()

    // otherwise we have to stat, because maybe c=true
    // if we know it exists, but not what it is.
  }
  var stat = this.statCache[abs];
  if (stat !== undefined) {
    if (stat === false)
      return cb(null, stat)
    else {
      var type = stat.isDirectory() ? 'DIR' : 'FILE';
      if (needDir && type === 'FILE')
        return cb()
      else
        return cb(null, type, stat)
    }
  }

  var self = this;
  var statcb = inflight_1('stat\0' + abs, lstatcb_);
  if (statcb)
    self.fs.lstat(abs, statcb);

  function lstatcb_ (er, lstat) {
    if (lstat && lstat.isSymbolicLink()) {
      // If it's a symlink, then treat it as the target, unless
      // the target does not exist, then treat it as a file.
      return self.fs.stat(abs, function (er, stat) {
        if (er)
          self._stat2(f, abs, null, lstat, cb);
        else
          self._stat2(f, abs, er, stat, cb);
      })
    } else {
      self._stat2(f, abs, er, lstat, cb);
    }
  }
};

Glob.prototype._stat2 = function (f, abs, er, stat, cb) {
  if (er && (er.code === 'ENOENT' || er.code === 'ENOTDIR')) {
    this.statCache[abs] = false;
    return cb()
  }

  var needDir = f.slice(-1) === '/';
  this.statCache[abs] = stat;

  if (abs.slice(-1) === '/' && stat && !stat.isDirectory())
    return cb(null, false, stat)

  var c = true;
  if (stat)
    c = stat.isDirectory() ? 'DIR' : 'FILE';
  this.cache[abs] = this.cache[abs] || c;

  if (needDir && c === 'FILE')
    return cb()

  return cb(null, c, stat)
};

var spawn = childProcess__default['default'].spawn;
var exec = childProcess__default['default'].exec;

var treeKill = function (pid, signal, callback) {
    if (typeof signal === 'function' && callback === undefined) {
        callback = signal;
        signal = undefined;
    }

    pid = parseInt(pid);
    if (Number.isNaN(pid)) {
        if (callback) {
            return callback(new Error("pid must be a number"));
        } else {
            throw new Error("pid must be a number");
        }
    }

    var tree = {};
    var pidsToProcess = {};
    tree[pid] = [];
    pidsToProcess[pid] = 1;

    switch (process.platform) {
    case 'win32':
        exec('taskkill /pid ' + pid + ' /T /F', callback);
        break;
    case 'darwin':
        buildProcessTree(pid, tree, pidsToProcess, function (parentPid) {
          return spawn('pgrep', ['-P', parentPid]);
        }, function () {
            killAll(tree, signal, callback);
        });
        break;
    // case 'sunos':
    //     buildProcessTreeSunOS(pid, tree, pidsToProcess, function () {
    //         killAll(tree, signal, callback);
    //     });
    //     break;
    default: // Linux
        buildProcessTree(pid, tree, pidsToProcess, function (parentPid) {
          return spawn('ps', ['-o', 'pid', '--no-headers', '--ppid', parentPid]);
        }, function () {
            killAll(tree, signal, callback);
        });
        break;
    }
};

function killAll (tree, signal, callback) {
    var killed = {};
    try {
        Object.keys(tree).forEach(function (pid) {
            tree[pid].forEach(function (pidpid) {
                if (!killed[pidpid]) {
                    killPid(pidpid, signal);
                    killed[pidpid] = 1;
                }
            });
            if (!killed[pid]) {
                killPid(pid, signal);
                killed[pid] = 1;
            }
        });
    } catch (err) {
        if (callback) {
            return callback(err);
        } else {
            throw err;
        }
    }
    if (callback) {
        return callback();
    }
}

function killPid(pid, signal) {
    try {
        process.kill(parseInt(pid, 10), signal);
    }
    catch (err) {
        if (err.code !== 'ESRCH') throw err;
    }
}

function buildProcessTree (parentPid, tree, pidsToProcess, spawnChildProcessesList, cb) {
    var ps = spawnChildProcessesList(parentPid);
    var allData = '';
    ps.stdout.on('data', function (data) {
        var data = data.toString('ascii');
        allData += data;
    });

    var onClose = function (code) {
        delete pidsToProcess[parentPid];

        if (code != 0) {
            // no more parent processes
            if (Object.keys(pidsToProcess).length == 0) {
                cb();
            }
            return;
        }

        allData.match(/\d+/g).forEach(function (pid) {
          pid = parseInt(pid, 10);
          tree[parentPid].push(pid);
          tree[pid] = [];
          pidsToProcess[pid] = 1;
          buildProcessTree(pid, tree, pidsToProcess, spawnChildProcessesList, cb);
        });
    };

    ps.on('close', onClose);
}

var any = bbhverse.any;
var Tasq = bbhverse.Tasq;
var statuslog = bbhverse.Traq;
var Traq = bbhverse.Traq;
Tasq.addlistener(statuslog.statuslog);

var nodeShellExec = cliverse.nodeShellExec;

const homedir = os__default['default'].homedir();

// singleton one time lazy
var getCredentials = function(){

  // First call
  var creds = fs.readFileSync(path__default['default'].normalize(`${homedir}/.elxrcredentials`), { encoding: 'utf8' });
  var creds = creds.split('\n').map( c => c.trim() && new URL(c));
  console.log(creds);

  // Subsequent calls
  getCredentials = ()=>{ return creds };
  return getCredentials();
};

const __ALIAS__STAMP__ = '9e7bebe0-1f57-11ec-8f88-778ffeea9d1b';
const BUILD_VERSION = 'Version: 1.0.0 - built on December 2, 2021 21:12:33';
const runtimestamp = (new Date()).getTime();
function getVersion() { return BUILD_VERSION; }
console.log(getVersion());

// 'use strict';

// PB : TODO -- make sure folder context is proper coz we can now run elxr from anywhere.

// PB : TODO -- 
// runas bypass non elevated tasks when we request privelege
// runas message is always error needs to be fixed.
// runas wait needs to be parallelized.
// suppress elevation check error messages
// support runas lauched directly from shell.
// pass in environment in hta to shellexecute.

// PB : NOTE -- iife doesnt work if previous statement is not terminated by ;
(function () {
  if (!Array.prototype.earlyreduce) {
    Array.prototype.earlyreduce = function(eachcallback, initialValue, donecallback){
      var iterable = this;
      var donecallback = donecallback || (a=>a);
      var result = { value : initialValue === undefined ? iterable[0] : initialValue };
      initialValue === undefined ? null : result = eachcallback(result, element, i, iterable);
      // function *earlyReduceGenerator(acc, v, i, a) {
        for(var i = initialValue === undefined ? 0 : 1; i < iterable.length; i++){
          var element = iterable[i];
          result = eachcallback(result, element, i, iterable);
          if(result.done) return donecallback(result)
        }
      // }
      return donecallback(result)
    };
  }
}());

const { existsSync } = fs__default['default'];
const existslink = function(name, cb){
  fs.lstat(name, (error, stats) => {
    if (error) {
      console.log(error);
      cb(error);
    }
    else {
      console.log("Stats object for: example_directory.txt");
      console.log(stats);
    
      // Using methods of the Stats object
      console.log("Path is file:", stats.isFile());
      console.log("Path is directory:", stats.isDirectory());
      cb(null, true);
    }
  });
};
const existsFolderSync = existsSync;
const fs = fs__default['default'];

const cliargs = bbhverse.cliargs;
const processedArgs = cliargs(process.argv.slice(2));
console.dir(processedArgs);
// PB : TODO -- defaults for valuless arguments if passed.
// Object.keys(processedArgs).forEach(a=>{
//   if(Object.prototype.toString.call(processedArgs[a]) === '[object Undefined]' || !processedArgs[a]) || trim(processedArgs[a])) == '') {

//   }
// })

// 




// Object.keys(clioverrides).forEach( prop => { })

require$$2.sync;

var ENV = Object.assign({}, process.env); // Shallow clone it.

const { readdir } = fs__default['default'].promises;

// Directory shallow walk and do perform on each dir.
const dirs = async (perform, path) => {
  for (const dir of await readdir(path || selectedinstance.root, { withFileTypes: true })) {
    if (dir.isDirectory()) perform(dir);
  }
};

var getShellTask = (command, args, options) => {
  options = options || {};
  var callshell = command === 'rm' ? getgitbashtask : getshelltask;
  return () => {
    var p = callshell( [command, args, Object.assign({
        inherit: true, shell: true, env: ENV, title: `${command} ${args}`
      }, options)
    ])();
    if (options.ignorefailures) {
      return p.catch(e => {
        // Ignore. Not a major error.
      })
    }
    else return p;
  }
};

var callshelltask = (args) => { 
  // console.dir(args)
  if( Object.prototype.toString.call(args) === '[object Function]' ) {
    return args;
  }
  return  getshelltask(args)() 
};

var getshelltask = (args) => { 
  return args[0] === 'rm' ? getgitbashtask(args) : () => { return nodeShellExec.apply(null, args) } };
var getgitbashtask = (args) => { return () => { 
  return nodeShellExec( `"${gitbash}"`, ['-c', `"${args[0]} ${args[1].join(' ')}"`], args[2]) } 
};

var getTaskCheckExists = (command, options) => {
  options = options || {};
  return () => {
    var p = nodeShellExec.apply(null, ['where', [command]]);
    if (options.ignorefailures) {
      return p.then(() => { return true }).catch(e => { // Ignore. Not a major error.
        return false;
      })
    }
    else return p.then(() => { return true });
  }
};

var getTaskWithElevation = function(tasdef){
  return ()=>{
    if (__isElevated) { 
      return tasdef.elevatedpulltasks().then(()=>{
        // PB : TODO -- Every elevation should have its own messaging file. Async writes from multiple processes are a problem here...
        fs.writeFileSync('run.done', 'success');
      }).catch(e=>{
        fs.writeFileSync('run.done', 'failure');
      });
    }
    else {
      // PB : TODO -- Rename op['runas'] to 'elevate'

      var __runasresult = null;

      return op['runas']().then((r) => { return __runasresult = r; })
        .catch((e) => {
          console.error(e);
        })
        .finally(() => {
          if(__runasresult && !__runasresult.skipped) fs.unlinkSync('run.done');
          if (!processedArgs.runas) {  return tasdef.regularpulltasks(); }
        })
    }
  }
};

var getTaskWithoutElevation = function(tasdef){
  return ()=>{
    if(!processedArgs.runas) {  return tasdef.regularpulltasks(); }
    else Promise.resolve(true);
  }
};

var gitops = {

  getdiscoverbranchcmd : function(repo){

    var parameters = ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;'];
    var cmd = [gitbash
      , ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;']
      , { cwd: instanceroot + '/' + repo, title: 'discoverbranch for ' + repo + ' ' + parameters.join(' ') }];
    return cmd
  }
};

var getPullCmd = (repo, branch) => {
  // console.log(useGitPull)var getPullCmd = (repo, branch) => {
  // console.log(useGitPull)

  var pullCmd = [];
  if(!branch) {
    // console.warn('No branch was specified detecting from working client.')
    // First check if working client exists.
    // if (existsSync(instanceroot + '/' + repo)) {
      pullCmd= gitops.getdiscoverbranchcmd(repo);
    // }
    // else performpull
  }
  // var pullCmd = [gitInstallDir
  //   , ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;']
  //   , { cwd: instanceroot + '/' + repo, title: 'pull all remotes for ' + repo }]
  if(branch) {
    var parameters = ['-c', 'for i in `git remote`; do git pull $i ' + branch + '; done;'];
    var pullCmd = [ gitbash
      , ['-c', 'for i in `git remote`; do git pull $i ' + branch + '; done;']
      , { cwd: instanceroot + '/' + repo, title : 'pull all remotes for ' + branch + '  ' + repo + ' ' + parameters.join(' ') }];
  }
  // var pullCmd = ['pullall', [], { cwd : repo }]
  if (useGitPull) pullCmd = ['git', ['pull'], {
    inherit: true, shell: true,
    cwd: instanceroot + '/' + repo
    // , env: process.env
    , runas: processedArgs.runas
    , title: `git pull ${repo}`
  }];
  return pullCmd
};

var performPull = (repo, branch, repoowner, errHandler) => {
  // PB : TODO -- Handle no branch passed in case.
  // if(!branch) { throw 'No branch specified' }
  try{
    var exists = existsSync(instanceroot + '/' + repo);
  }
  catch(e){
    exists = false;
    console.log(e);
  }


  if (exists) {
    
    var branchprint =  branch ? ' branch :' + branch  : '';
    console.log('pulling ' + instanceroot + '/' + repo + branchprint );
    return nodeShellExec.apply(null, getPullCmd(repo, branch)).then(() => {
            if (__isElevated) {
        fs.writeFileSync('run.log', ', ' + JSON.stringify({ repo, success: true }), { 'flag': 'a+' });
      }
      else statuslog.statuslog(null, repo);
      return true;
    })
    .catch((e) => {
      e.repo = repo;
      if(errHandler) throw errHandler(e)
      if (__isElevated) {
        fs.writeFileSync('run.log', ', ' + JSON.stringify(e), { 'flag': 'a+' });
      }
      else statuslog.statuslog(e); 
      // console.error(e)
      throw e;
    })
  }
  else {
    console.log('cloning ' + repo);
    // PB : TODO -- detect if a clonable repo exists in currentGitAuthUser
    return nodeShellExec('git', ['clone', '-c', 'core.symlinks=true', selectedinstance.reposerver + `/${repoowner || defaultRepoOwner}/` + repo + '.git'],
      {
        inherit: true, shell: true,
          env: process.env
        , cwd : instanceroot 
        , runas: processedArgs.runas
      }).then(() => {

        return nodeShellExec('git', ['config', '--replace-all', 'core.symlinks', true],
          {
            inherit: true, shell: true,
            env: process.env
            , cwd: instanceroot + '/' + repo
            , runas: processedArgs.runas
            , title: `'git', ${['config', '--replace-all', 'core.symlinks', selectedinstance.username].join(' ')}`
          })
          .then(() => {
            if (__isElevated) {
              fs.writeFileSync('run.log', ', ' + JSON.stringify({ repo, success: true }), { 'flag': 'a+' });
            }
            else statuslog.statuslog(null, repo);
          })
          .catch((e) => {
            e.repo = repo;
            if (__isElevated) {
              fs.writeFileSync('run.log', ', ' + JSON.stringify(e), { 'flag': 'a+' });
            }
            else statuslog.statuslog(e);
          })
      })
      .catch(e => {
        e.repo = repo;
        if(errHandler) throw errHandler(e)
        if (__isElevated) {
          fs.writeFileSync('run.log', ', ' + JSON.stringify(e), { 'flag': 'a+' });
        }
        else statuslog.statuslog(e);
        throw e
      })
  }
};

// PB : TODO -- If we are run from an elevated shell it never moves forward and simply exits.
// -- Currently workaround is to always run from a non-elevated shell.
var __isElevated = null; // We assume non-Elevated until someone evaluates and sets this variable.
var acquireElevationState = () => {
  if (__isElevated === null) {
    return nodeShellExec("fsutil", ["dirty", "query", "C:"], {
      inherit: true
      // , shell: true
      , stdio: 'ignore'
      , env: process.env
      , title: `check privileged execution mode using "fsutil dirty query C:"`
    }).then((exitcode) => {
      console.log('Elevated');
      __isElevated = true;
      return true;
    }).catch(() => {
      __isElevated = false;
      console.log('Not Elevated');
      return false;
    });
  }
  else return Promise.resolve(__isElevated);
};
var defaultRepoOwner = 'chess';
var elevatedRunasRepos = null;
var gitRepos = null;

// grep -qxF 'alias elxr="node elxr/index.js"'  ~/.bash_profile || echo 'alias elxr="node elxr/index.js"' >> ~/.bash_profile


// nodeShellExec('echo', ['elxr'], { inherit : true}) //, {stdio: "inherit"}

var dbForLabel = function (label) {
  var dbsForLabel = {
    devmysql: 'mysql'
    , development: 'mssql'
    , production: 'mssql'
  };
  return dbsForLabel[label] || 'mysql'
};

// SAM : TODO Use nodeshellexec where to detect git installation dir
var gitbash = "C:\\Program Files\\Git\\bin\\sh.exe";
// var gitbash = "G:\\Installed\\Git\\bin\\sh.exe"
// Relevant git repos
var exludeMergeRepos = [];
var useGitPull = processedArgs.useGitPull || false;


var op = {
    'h': () => { console.log(elxr.help()); return '-h' }
  , 'clean' : () => {
    // delete all node_module folders and links.
    var tasklist = [];
    dirs( (repodir)=> tasklist.push(getShellTask('rm',['-rf', 'node_modules'], { cwd : instanceroot + '/' + repodir.name })()), instanceroot );
    return Promise.all(tasklist)
  }
  // , 'undefined': () => { return acquireChoices( {} ); }
  , 'reset': () => {

    // Reset NPM packages semver so major versions can be updated.

    const fs = fs__default['default'];
    const wipeDependencies = (__package) => {
      const file = fs.readFileSync(__package + '/package.json');
      const content = JSON.parse(file);
      for (var devDep in content.devDependencies) {
        if (content.devDependencies[devDep].match(/\W+\d+.\d+.\d+-?((alpha|beta|rc)?.\d+)?/g)) {
          content.devDependencies[devDep] = '*';
        }
      }
      for (var dep in content.dependencies) {
        if (content.dependencies[dep].match(/\W+\d+.\d+.\d+-?((alpha|beta|rc)?.\d+)?/g)) {
          content.dependencies[dep] = '*';
        }
      }
      fs.writeFileSync(__package + '/package.json', JSON.stringify(content));
    };

    var repos = ['client'];
    // repos = gitRepos;
    repos.forEach(wipeDependencies);
    // if (require.main === module) {
    // } else {
    //   module.exports = wipeDependencies
    // }

  }
  , 'upgrade': () => {
    console.log('upgrade.......');
    var tasks = [
      () => {
        var p = nodeShellExec('npm', ['i', '-g', 'npm-upgrade'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e); });
        p.position = 1;
        console.log('One');
        return p;
      }
      , () => {
        var p = nodeShellExec('npm', ['cache', 'clean', '-f'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e); });

        p.position = 2;
        console.log('Two');
        return p;
      }
      , () => {
        var p = nodeShellExec('npm', ['install', '-g', 'n'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e); });
        p.position = 3;
        console.log('Three');
        return p;
      }
      , () => {
        var p = nodeShellExec('n', ['latest'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e); });
        p.position = 4;
        console.log('Four');
        return p;
      }
    ];
    any(tasks);
    console.log('.......done');
    console.log('Running exlr upgrade in : ' + path__default['default'].dirname(__dirname));
    console.log('Currently only upgrades ember : ' + path__default['default'].dirname(__dirname));
    console.info('Uninstalling existing ember globally');
    var step1 = nodeShellExec('cmd', ['/c', 'npm', 'uninstall', '-g', 'ember-cli'], {
      stdio: ['pipe', process.stdout, process.stderr],
      inherit: true,
      shell: true,
      cwd: path__default['default'].dirname(__dirname),
      env: env
    });
    step1.on('close', () => {
      console.info('Installing ember globally');
      var step2 = nodeShellExec('cmd', ['/c', 'npm', 'install', '-g', 'ember-cli'], {
        stdio: ['pipe', process.stdout, process.stderr],
        inherit: true,
        shell: true,
        cwd: path__default['default'].dirname(__dirname),
        env: env
      });

      step2.on('close', () => {
        nodeShellExec('cmd', ['/c', 'ember', '--version'], {
          stdio: ['pipe', process.stdout, process.stderr],
          inherit: true,
          shell: true,
          cwd: path__default['default'].dirname(__dirname),
          env: env
        });
      });
    });
  }
  , 'runas': () => {

    if(processedArgs.skipelevated) return Promise.resolve({ skipped : true });

    console.log('Testing Elevation');

    if (__isElevated) {
      try {
        op[processedArgs.label || processedArgs._[0] || 'undefined']();
      }
      catch (e) {
        console.error('Error Invalid command : ' + e);
        fs.writeFileSync('run.done', 'error');
      }
      finally {
      }
    }
    else {
      console.log('Requesting Elevated Privileges');
      // Wait for the runas to complete before we read it.
      try {
        fs.unlinkSync('run.done');
        fs.unlinkSync('run.log');
      }
      catch (e) { } //Ignore 

      // Find node path to send to hta.
      return nodeShellExec('where', ['node']).then(r => {
        var namedArgs = [];
        console.log('result : ' + JSON.stringify(r));
        Object.keys(processedArgs).forEach((v) => { v != '_' ? namedArgs.push('--' + v + '=' + processedArgs[v]) : null; });
        // PB : TODO -- Convert all the cli args back to string.
        var args = [`${selectedinstance.root}/.elxr/run-${runtimestamp}/windowselevate.hta`].concat(processedArgs._).concat(namedArgs.join(' ')); args.push('--runas=self');
        // args.push('--nodepath=' + r.messages[r.messages.length - 1])
        // if (!processedArgs.node_env) args.push('--node_env=' + ENV.NODE_ENV)
        // if (processedArgs.debug) args.push('--debug=true') // Enable to debug elevated..
        console.dir(processedArgs);

        return nodeShellExec('MSHTA', [`"${args.join('" "')}"`]
          , {
            inherit: true
            , shell: true
            , env: ENV
            , runas: 'self'
            , title: `runas`
          }
        ).then(() => {
          // runas returned.
          try {
            // PB : TODO -- Log is comma prefixed. Needs to be proper JSON.
            var runaslog = JSON.parse('[ { "success" : true, "result" : "started"}' + fs.readFileSync('run.log', { flags: 'a+' }) + ']');
            runaslog.forEach((logEntry) => {
              statuslog.statuslog(logEntry.success ? null : logEntry, logEntry);
              logEntry.success ? (console.log(['success :' + logEntry.result]), console.log((logEntry.messages || []).join(' '))) : (console.error(['error :' + logEntry.result]), console.error((logEntry.messages || []).join(' ')));
            });
          }
          catch (e) {
            // We must have a runas log
            statuslog.statuslog(e);
            console.error('Run log error probably was not created by runas : ' + e);
          }
        })
          .catch(err => console.error('Elevation failed : ' + err));
      })

    }
  }
  , 'push': () => {
    if (!processedArgs._[1]) { console.error('push all not supported. Specify repo name'); return }
    // init remote bare from local
    // pushandinitremotebare
    // https://www.jeffgeerling.com/blogs/jeff-geerling/push-your-git-repositories
    // connect to repo server -- net use 172.16.0.27 
    // cd 172.16.0.27/repos/
    // mkdir repo.git
    // cd repo.git
    // git init --bare
    // cd localrepo
    // git remote rename origin githubclone
    // git remote add origin //172.16.0.27/repos/repo.git
    // git push origin master

    var repo = processedArgs._[1];

    var sequentialTaskShellCommands = [];
    if (!existsSync(`Z:/${repo}.git`)) {
      sequentialTaskShellCommands = [
        // ['net', ['use', 'Z:', selectedinstance.reposerver.replace('/','\\')], {
        //   inherit : true, shell: true
        //   , env: process.env
        // }]
        ['pwd', { cwd: 'Z:', inherit: true }]
        , ['mkdir', [`${repo}.git`], {
          cwd: `Z:`
          , inherit: true, shell: true
          , env: process.env
        }]
        , ['pwd', { cwd: `Z:/${repo}.git`, inherit: true }]
        , ['git', ['init', '--bare'], {
          cwd: `Z:/${repo}.git`
          , inherit: true, shell: true
          , env: process.env
        }]
        // PB : TODO -- Do this conditionally only...
        , ['git', ['remote', 'rename', 'origin', 'githubclone'], { cwd: `${instanceroot + '/' + repo}` }, (err) => {
          console.log('Ignoring origin rename error : ' + err); return true; //return true to continue.
        }] // PB ; Todo -- new repositories created locally will not have origin. Handle this failure.
        , ['git', ['remote', 'add', 'origin', `${selectedinstance.reposerver}/${repo}.git`], { cwd: `${instanceroot + '/' + repo}` }]
        // PB : TODO -- If threre is a gitbubclone origin 
        // Set the master to pull from the local repo.
      ];
      if (!existsSync(`Z:`)) {
        sequentialTaskShellCommands.splice(0, 0, ['net', ['use', 'Z:', selectedinstance.reposerver.replace(/\//gm, '\\')], {
          inherit: true, shell: true
          , env: process.env
        }]);
        console.warn('Adding network drive z: for repo server. ' + sequentialTaskShellCommands[0]);
        // throw 'done'
      }
    }

    sequentialTaskShellCommands.push(['git', ['push', 'origin', 'master'], { cwd: `${instanceroot + '/' + repo}` }]);
    // console.dir(sequentialTaskShellCommands);

    var tasks = [];
    sequentialTaskShellCommands.forEach(shellcmd => {
      // console.log(shellcmd)
      tasks.push(() => {

        var p = nodeShellExec.apply(null, shellcmd.slice(0, 3)).catch((e) => { if (shellcmd[3]) { return shellcmd[3]() } else { console.error(e); } });
        return p;
      });
    });
    any(tasks);

  }
  , 'is-git-repo': (dir) => {
    return nodeShellExec('git', ['-C', dir.name, 'rev-parse'], { stdio: 'ignore' })
  }
  // git remote equivalents...
  // git branch --set-upstream-to=elixir-unc/master master
  // git push --set-upstream elixir-unc branch..
  , 'remote': (args) => { 
    
    // Subcommands!
    // PB : TODO -- we can now pass in hypehnated args...
    if(!processedArgs.v) return false; // Only -v is supported presently..

    var serial_perform = (repo) => {
      var options = { cwd: instanceroot + '/' + repo };
      
      return [
        ['git', ['remote', '-v'], options]
      ]
    };

    var x = (args) => {
      var tasq = () => {
        // console.log(args)
        return nodeShellExec.apply(null, args).catch(e => {
          // We continue on failure.
          console.error(tasq.toString());
        })
      };
      tasq.toString = function(){
        return JSON.stringify(args)
      };
      return tasq;
    };

    var perform = (dir) => {
      return any(serial_perform(dir.name).map(x))
    };

    dirs(perform);
  }

  , 'remote set-url': (args) => {
    // git remote set-url elixir-unc //10.10.5.60/gitrepo/chess/bbhverse
    var __args = {
      remotename : args.remotename || processedArgs._[2]
      , url : args.url || processedArgs._[3]
    };

    // pushable doesn't mean the remote doesn't support being pushed to. 
    // Over here it just means we are disabling pushing to that remote by setting the push portion of the url the a junk remote called no-pushing. 
    // PB : TODO -- change this to enablepushing.
    // By default pushing should be disabled. Also developers permissions on the remote is a secondary check for pushing.
    var pushable = processedArgs.pushable || false;
    remotename = __args.remotename;
    url = __args.url;
    var serial_perform_git_seturl = (repo) => {
      // console.log(repo)
      if (pushable) {
        return [
          ['git', ['remote', 'set-url', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
        ]
      }
      else {
        return [
          ['git', ['remote', 'set-url', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], { cwd: instanceroot + '/' + repo }]
        ]
      }

    };

    var x = (args) => {
      var tasq = () => {
        // console.log(args)
        return nodeShellExec.apply(null, args).catch(e => {
          // We continue on failure.
          console.error(tasq.toString());
        })
      };
      tasq.toString = function(){
        return JSON.stringify(args)
      };
      return tasq;
    };
    var perform_git_seturl = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        return any(serial_perform_git_seturl(dir.name).map(x))
      }).catch((e) => {
        // console.log('Failed : ' + dir.name)
      });
    };

    dirs(perform_git_seturl);
  }
  // , 'reset' : ()=>{ 
    // PB : TODO -- Cant have 2 resets !! | There is an npm reset that should be bundled.
  //   // Reset the whole installation pertaining to this elxr folder.
    
  // }

  , 'remote exists': (args) => {
    var __args = {
        remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]
    };

    var options = args.repo ? { cwd: instanceroot + '/' + args.repo } : {};

    // PB : TODO -- We should evaluate a whole list of remotes passed in from args instead of just one.
    var commands = [
      // git remote -v| while read remote; do "${remote#origin/}" "$remote"; done
        // ['git', ['remote', '-v', '| while read remote; do "${remote#origin/}" "$remote"; done'], utils.assign( { 
        ['git', ['remote', '-v'], bbhverse.assign( { 
          evaluateResult : function(err, result){ 
            // var found = result.messages.find( (r)=> { return r.includes( __args.remotename )  })
            var remotes = [];
            var found = false;
            console.dir(result.messages);
            console.log(result + '---------------');
            result.messages.forEach( (line)=> { 
              console.log(line + '$$$$$$$$$$$$$$$$$$$$');
              var matches = line.match(/(.*)?\s\s([^\(]*)?\s?\(?([^\)]*)\)?/);
              if(matches) {
                var remote = {};
                remote[matches[1]] = matches[2];
                if( (!matches[3].trim() ||  matches[3].trim() === 'fetch') && matches[1].trim() === remotename.trim()) {
                  found = true;
                  result.url = remote[remotename];
                }
              }
            });
            console.dir(remotes);
            return [
                  found
                , result
            ]
          } 
        } , options) ]
        , function(prevserialtaskresult) {
            console.log('================================');
            var url = __args || prevserialtaskresult.url;
            console.dir(prevserialtaskresult);
            return getshelltask(['git', ['ls-remote', url], bbhverse.assign( { 
              evaluateResult : function(err, result){
                // fatal: unable to access '${__args.url}/': Failed to connect to git.bbh port 80 after 21025 ms: Timed out
                // `fatal: repository '${__args.url}/' not found`
                var hasfailed = /^fatal: .*/.test(result.messages.join(' '));
                return [
                    !hasfailed, result
                ]
              } 
            } , options) ])() 
        } 
    ];
    var mapped = commands.map(callshelltask);  //.map( p => p.catch(e => e)) // Handle errors later.
    return any(mapped).then( allresolved =>{
      console.dir(allresolved);
      !allresolved[0][0] && !allresolved[1][0] ? console.log('was not added as a remote and url is currently inaccessible.')
        : allresolved[0][0] && allresolved[1][0] ? console.log('was added as a remote and url is accessible.')
        : allresolved[0][0] && !allresolved[1][0] ? console.log('was added as a remote but url is currently inaccessible.')
        : console.log('was not added as a remote but url is currently accessible.');
      
      return !allresolved[0][0] && !allresolved[1][0] ? [0, 0]
        : allresolved[0][0] && allresolved[1][0] ? [1, 1]   // => was added as a remote and url is accessible.
        : allresolved[0][0] && !allresolved[1][0] ? [1, 0]  // => was added as a remote but url is currently inaccessible.
        : [0, 1]  // => was not added and remote and url is accessible.
    })
  }

  , 'remote refresh': (args) => {
    var __args = {
        remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]
    };

    // use the repo manifest to create missing remotes.
    function perform_remote_refresh(dir){
      var repo = dir.name;
      var dscoverbranchcmd = gitops.getdiscoverbranchcmd(repo);
      try {
        var remotes = commonjsRequire(`${selectedinstance.root}/${dir.name}/repo-manifest.js`,"/$$rollup_base$$")( null, selectedinstance).remotes || [];
      }
      catch(e){
        var remotes = [];
      }
      // console.log(`${dir.name}/repo-manifest.js` + '---------------------------')
      // console.dir(remotes)

      return nodeShellExec.apply(null, dscoverbranchcmd).then(__branch=>{ 
        console.log('Processing : ' + dir.name);
        var branch = __branch;
        __args.repo = repo;
        __args.branch = __branch;
        var promises = [];

        remotes.forEach(remote =>{
          Object.keys(remote).forEach(remotename => {
            __args.remotename = remotename;
            __args.url = remote[remotename];
            promises.push( op['remote exists']( __args ).then( exists => {
                if(!exists[0]) {
                  if(!exists[1]) { console.error( `Skipping inaccessible remote url ${__args.url}` ); }
                  else return op['remote add']( { remotename, 
                    // PB : TODO -- use the most accessible remote instead of the first available.
                    url : (bbhverse.js.isArray(remote[remotename]) ? remote[remotename][0] : remote[remotename]), branch 
                  } )
                }
              })
            );
          });
        });

        return Promise.all(promises)
      })
      .catch((e) => { console.log('Processing Error : ' + dir.name); console.error(e); return { error: true, message: repo } })
    }
    
    return dirs(perform_remote_refresh)
  }
  , 'remote add': (args) => {
    // PB : TODO -- set-upstream-to should be chosen and intentionally switched. Coz we can have multiple upstream remotes.
      // Also each upstream remote may need to have is own branch to switch to. We therefore need a branch nomenclature
      // That explicitly has a remote name prefix.
      // git branch branch_name --set-upstream-to your_new_remote/branch_name
      // git branch branch_name -u your_new_remote/branch_name -- older versions
      // git branch -vv -- Detect which branch are we tracking.
      // default upstream should be users own fork.
      // Also need alias branches to 
        // define a git alias which would git pull master from one repo, and then git pull master from other remotes.
        // probably git merge from all remotes... and relevant branches...
    // alias pushall='for i in `git remote`; do git push $i; done;'
    // alias pullall='for i in `git remote`; do git pull $i; done;'
    // args === processedArgs ? args = {} : null;
    var __args = {
      remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]
    };
   
    var remotename = __args.remotename;
    var url = __args.url;
    var branch = __args.branch;

    var pushable = processedArgs.pushable || false;


    var serial_perform_git_add = (repo) => {
      // console.log(repo)
      if (pushable) {
        return [
          ['git', ['remote', 'add', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + repo }]
          , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], { cwd: instanceroot + '/' + repo }]
        ]
      }
      else {

        return [
          ['git', ['remote', 'add', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], { cwd: instanceroot + '/' + repo }]
          , ['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + repo }]
          , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], { cwd: instanceroot + '/' + repo }]
        ]
      }

    };
    var x = (args) => {
      return () => {
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    };
    var perform_git_add = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        // console.log(code)
        if (logEntry.success) {
          nodeShellExec('git', ['remote', 'get-url', remotename], { cwd: dir.name, stdio: 'ignore' }).then(() => {
            console.log('skipped : ' + dir.name + ', reason : A remote with same name already exists.');
          })
          .catch((e) => {
            any(serial_perform_git_add(dir.name).map(x));
          });
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e) => {
        console.log('Failed : ' + dir.name);
      });
    };

    fs__default['default'].promises;
    
    dirs(perform_git_add);
  }
  , 'remote remove': (args) => {
    
    var __args = {
      remotename : args.remotename|| processedArgs._[2]
    };
    var remotename = __args.remotename;
    var serial_perform_git_remove = (repo) => {
      // console.log(repo)
      return [
        ['git', ['remote', 'remove', remotename], { cwd: instanceroot + '/' + repo }]
      ]
    };
    var x = (args) => {
      return () => {
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    };
    var perform_git_remove = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        // console.log(code)
        if (logEntry.success) {
          nodeShellExec('git', ['remote', 'get-url', remotename], { cwd: dir.name, stdio: 'ignore' }).then(() => {
            any(serial_perform_git_remove(dir.name).map(x));
          })
            .catch((e) => {
              console.log('skipped : ' + dir.name + `, reason : No remote named ${remotename}`);
            });
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e) => {
        // console.log('Failed : ' + dir.name)
      });
    };

    fs__default['default'].promises;

    dirs(perform_git_remove);
  }
  , 'init-gitea': (user) => {
    user = user || processedArgs._[1];
    if (!user) throw 'User name required'
    var serial_perform_init_gitea = (repo) => {
      // console.log(repo)
      return [
        ['git', ['remote', 'add', 'chess', `${selectedinstance.reposerver}/${user}/${repo}.git`], { cwd: instanceroot + '/' + repo }]
        , ['git', ['remote', 'set-url', '--push', 'chess', 'no-pushing'], { cwd: instanceroot + '/' + repo }]
        , ['git', ['remote', 'set-url', 'origin', `${selectedinstance.reposerver}/${user}/${repo}.git`], { cwd: instanceroot + '/' + repo }]
      ]
    };
    var x = (args) => {
      return () => {
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    };
    var perform_init_gitea = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        // console.log(code)
        if (logEntry.success) {
          nodeShellExec('git', ['remote', 'get-url', 'chess'], { cwd: dir.name, stdio: 'ignore' }).then(() => {
            console.log('skipped : ' + dir.name + ', reason : Already has remote chess ');
          })
            .catch((e) => {
              any(serial_perform_init_gitea(dir.name).map(x));
            });
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e) => {
        // console.log('Failed : ' + dir.name)
      });
    };

    fs__default['default'].promises;

    dirs(perform_init_gitea);
  }
  , 'syncmaster': (label) => {
    // Usage :
    // elxr pull -- Defaults to run config

    Object.assign({}, process.env); // Shallow clone it.
    // console.dir(env)
    console.log('Running exlr pull : ' + path__default['default'].dirname(__dirname));

    if (!processedArgs.runas) gitRepos.map((def) => performPull(def.repo, def.branch || 'master'));
    if (__isElevated) {
      return any(elevatedRunasRepos.map((def) => performPull(def.repo, def.branch || 'master'))).then(() => {
        fs.writeFileSync('run.done', 'success');
      }).catch(() => {
        fs.writeFileSync('run.done', 'error');
      })
    }
    else return op['runas']()
  }

  , 'repo-relocate' : function(args){
    // relocate a subfolder in source repo to same subfolder in target repo with history. 

    var args = args || {
        remotebase : processedArgs._[4] || 'http://git.bbh/chess/'
      , folder : processedArgs._[3] || 'server'
      , sourcerepo : processedArgs._[2] || 'client'
      , targetrepo : processedArgs._[1] || 'elixir-server'
    };
    var sourcerepooptions = { cwd: `${instanceroot}/relocate/${args.sourcerepo}`
      // , stdio: ['pipe', process.stdout, process.stderr]
      , inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    };

    return op['repo-split'](args).then(()=>{
      return op['repo-merge'](args).then(()=>{
        
        // cleanup folder from source.
        var cmdseq = [
            ['rm', ['-rf', `${args.folder}`], sourcerepooptions ]
          // commits have to intentional...
          // , ['git', ['commit', '-a', '-m', `relocate folder ${args.folder} to ${targetrepo}`], sourcerepooptions ]
        ];

        return any(cmdseq.map(getshelltask))
      })
    }).catch(e=>{console.error(e);})
  }

  , 'repo-split' : function(args) {
    
    // https://gist.github.com/smdabdoub/17065c348289158277b5
    
    /**
     * Eg : folder, remotebase, sourcerepo, targetrepo
     *  args.folder = 'server'
     *  args.remotebase = 'https://git.bbh/chess/'
     *  args.sourcerepo = 'client'
     *  args.targetrepo = 'elixir-server'
     */

    var args = args || {
        folder : 'server'
      , remotebase : 'http://git.bbh/chess/'
      , sourcerepo : 'client'
      , targetrepo : 'elixir-server'
    };

    var options = { cwd: `${instanceroot}/relocate`
      // , stdio: ['pipe', process.stdout, process.stderr]
      ,  inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    };
    
    var cmdseq = [
        // create a temporary working dir in current folder where we started execution.
        ['mkdir', [ '-p', `${instanceroot}/relocate`]]
      , ['git', ['clone', `${args.remotebase}${args.sourcerepo}`], options ]
      , ['git', ['clone', `${args.sourcerepo}`, `relocate-${args.sourcerepo}-${args.folder}`], options]
      , ['git', ['clone', `${args.remotebase}${args.targetrepo}`, `relocate-${args.targetrepo}-${args.folder}`], options]
    ];
      
    return any(cmdseq.map(getshelltask)).then(() => { 
      // , ['git', ['subtree', 'split', '-P', `${args.folder}`, '-b', `relocate-${args.sourcerepo}-${args.folder}`], sourcerepooptions] 
        // split doesnt retain folder structure we need to move and commit ourselves through a branch to retain history... 
          // , ['git', [`checkout relocate-${args.sourcerepo}-${args.folder}`], sourcerepooptions] 
          // , ['mkdir', [`${args.folder}`], sourcerepooptions]
          // , ['git', ['mv', `!(${args.folder})`, `${args.folder}`], sourcerepooptions ] // requires  shopt -s extglob
          // , ['git', ['commit', `-m`, 'Moved to same subfolder after subtree split in branch'] , sourcerepooptions]
          
      
      // subtree split and filter-branch are options. We currently use repo-filter. 
      return  op['filter-repo'](args)
    }).catch(e=>{console.error(e); throw 'failed'})
  }

  , 'repo-merge' : function(args) {
    // Merge source repo into target repo
    var args = args || {
        folder : 'server'
      , remotebase : 'http://git.bbh/chess/'
      , sourcerepo : 'client'
      , targetrepo : 'elixir-server'
    };

    ({ cwd: `${instanceroot}/relocate/relocate-${args.sourcerepo}-${args.folder}`
      // , stdio: ['pipe', process.stdout, process.stderr]
      , inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    });
    var targetrepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.targetrepo}-${args.folder}` 
      // , stdio: ['pipe', process.stdout, process.stderr]
      , inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    };

    var cmdseq = [
        ['git', ['pull', `../relocate-${args.sourcerepo}-${args.folder}`, `master`, '--allow-unrelated-histories'] 
          , targetrepooptions ]
      // , ['git', ['push', targetrepooptions ] // manual push for now..
    ];
    return any(cmdseq.map(getshelltask)).catch(e=>{console.error(e);})
  }

  , 'filter-repo' : function(args){
      // Merge source repo into target repo
      var args = args || {
          folder : 'server'
        , remotebase : 'http://git.bbh/chess/'
        , targetrepo : 'elixir-server'
      };
  
      var targetrepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.sourcerepo}-${args.folder}` 
        , inherit: true, shell: true
        , env: process.env
        , runas: processedArgs.runas
      };

      var cmdseq = [
        // git checkout -b feature/merge-old-project
              // git remote add src-project ../src-project
        ['git', ['filter-repo', '--path', `${args.folder}`], targetrepooptions ]
      ];
      return any(cmdseq.map(getshelltask)).catch(e=>{console.error(e); throw 'failed' })
  }

  , 'filter-branch' : function(preservefolder, repo){
    // https://stackoverflow.com/questions/359424/detach-move-subdirectory-into-separate-git-repository
    // git subtree split -P <name-of-folder> -b <name-of-new-branch>
    // Preserve a specific folder.
    // PB : TODO -- filter-branch has known issues. Explore subtree and filter-repo...
    /*
    git clone repo reposplit
    git filter-branch --tag-name-filter cat --prune-empty --subdirectory-filter {{folder}} -- --all 
    git remote rm origin
    */

    throw 'filter-repo-history not yet implmented pls refer to manual commands in code.'
  }

  // , 'repo-merge-folder' : function(mergetarget, mergesource, mergefolder){
  //   // Merge repo2 into a subfolder in repo1
  //   // https://alexharv074.github.io/puppet/2017/10/04/merge-a-git-repository-and-its-history-into-a-subdirectory-of-a-second-git-repository.html
  //   // https://thoughts.t37.net/merging-2-different-git-repositories-without-losing-your-history-de7a06bba804
  //   /*
  //     cd repo1
  //     git remote add -f tempmergesource ../{{mergesource}}/.git
  //     git merge -s ours --no-commit tempmergesource/master --allow-unrelated-histories
  //     git read-tree --prefix={{mergefolder}} -u tempmergesource/master:
  //     git commit

  //     // Repair History
  //     // === git filter-branch --tree-filter '(echo === $GIT_COMMIT:; git ls-tree $GIT_COMMIT) >> /tmp/tree.log'
          
  //             #!/usr/bin/env bash

  //                       first=ed4f16becc2f03820c164e0617bb98f12ff49ef0
  //                       last=038e26e21bd60fa265d6637261f3bc918780d2e8
  //                       subdir=server

  //                       git filter-branch --tree-filter '
  //                         first='"$first"'
  //                         last='"$last"'

  //                         subdir='"$subdir"'
  //                         log_file=/tmp/filter.log

  //                         [ "$GIT_COMMIT" = "$first" ] && seen_first=true

  //                         if [ "$seen_first" = "true" ] && [ "$seen_last" != "true" ]; then
  //                           echo "=== $GIT_COMMIT: making changes"
  //                           files=$(git ls-tree --name-only $GIT_COMMIT)
  //                           mkdir -p $subdir
  //                           for i in $files; do
  //                             mv $i $subdir || echo "ERR: mv $i $subdir failed"
  //                           done
  //                         else
  //                           echo "=== $GIT_COMMIT: ignoring"
  //                         fi \
  //                           >> $log_file

  //                         [ "$GIT_COMMIT" = "$last" ] && seen_last=true

  //                         status=0  # tell tree-filter never to fail
  //                       '

  //     git remote rm tempmergesource
  //   */
  //   // better alternative for history
  //   /**
  //    * 
  //     git clone git@server.com:old-project.git
  //     git clone git@server.com:new-project.git
    
  //     cd old-project
  //     mkdir old-project
  //     git mv !(old-project) old-project
  //     ls -la and gt mv hidden files ....
  //     git commit -a -S -m “Moving old project into its own subdirectory”
    
  //     cd ../new-project
  //     git remote add old-project ../old-project
  //     git fetch old-project
  //     git checkout -b feature/merge-old-project
  //     git merge -S --allow-unrelated-histories old-project/master
  //     git push origin feature/merge-old-project
  //     git remote rm old-project
  //   */  

  //   throw 'merge-repos not yet implmented pls refer to manual commands in code.'
  // }

  , 'pull' : (label) => {
    // Usage :
    // elxr pull -- Defaults to run config

    return elxr.getpulltask(selectedinstance)()
  }
  , 'isInstalled': () => {
    return nodeShellExec('where', [processedArgs._[1]], { inherit: true }).then(() => {
      console.log(processedArgs._[1] + ' exists.');
      return true;
    });
  }
  , 'c' : ()=>{

  }
  , 'i' : () => {
    var tasks = [];
    // tasks.push(op['pull']);
    tasks.push(getShellTask.apply(null, ['rm', [instanceroot + '/run.js'], { ignorefailures: true }]));
    tasks.push(op['use']);
    if (!__isElevated) {
      tasks.push(op['npmi']);
    }

    // var tasksdefs = [
    //     ['elxr', ['pull']]
    //   , ['elxr', ['use', 'elixir']]
    //   , ['elxr', ['npmi']]
    // ]


    // tasksdefs.forEach(tasksdef=>{
    //   tasks.push( ()=> nodeShellExec.apply(null, tasksdef) )
    // })

    return any(tasks);

  }
  , 'npmi': () => {
    var tasks = [];

    // Build fails without babel...
    tasks.push(getShellTask(
      'npm',[ 'i', '-g', 'babel-cli' ]
    ) );

    var npmbuildrepos = ['loopback-jsonapi-model-serializer'];
    // npmbuildrepos = []
    npmbuildrepos.forEach(repo => {
      tasks.push(() => {
        return nodeShellExec('npm', ['i --force'], {
          inherit: true, shell: true
          , cwd: instanceroot + '/' + repo
          , env: process.env
          , title: `npm i for ${repo}`
        }).catch((e) => {
          console.error('Ignoring Benign Error'); console.error(e);
        }).then(() => {
          console.log(`--npm run build for ${repo}--------------------`);
          return nodeShellExec('npm', ['run build'], {
            inherit: true, shell: true
            , cwd: instanceroot + '/' + repo
            , env: process.env
            , title: `npm run build for ${repo}`
          }).then(Tasq.then).catch(Tasq.catch)
        })
      });
    });

    return any(tasks).then(() => {

      gitRepos.push('chess-server-lib/server');
      gitRepos = gitRepos.concat(elevatedRunasRepos);

      // gitRepos = [
      //   // 'bbhverse', 'serververse', 'elixir-server', 
      //   // 'clientverse', 
      //   'client'
      // ];
      var rmtasks = [];
      var repotasks = [];
      var env = Object.assign({}, process.env);
      delete env.NODE_ENV;
      gitRepos.forEach(repodef => {
        rmtasks.push(
          // () => {
            // console.log(`--rm package-lock.json for ${repodef.repo}--------------------`)
            // return nodeShellExec(`"${gitbash}"`, ['-c', '"rm  package-lock.json"'], {
            callshelltask(['rm', ['package-lock.json'], {
              inherit: true, shell: true
              , cwd: instanceroot + '/' + repodef.repo
              , env: process.env
              , title: `rm 'package-lock.json' for ${repodef.repo}`
            }])
            .then(()=>{
              console.log(`--rm package-lock.json for ${repodef.repo}--------------------`);
            }).catch((e) => { console.error(e); })
          // }
        );

        if (npmbuildrepos.indexOf(repodef.repo) < 0) {
          repotasks.push(
            () => {
              console.log(`--npm i for ${repodef.repo}--------------------`);
              var p = nodeShellExec('npm', ['i', '--force'], {
                inherit: true, shell: true
                , cwd: instanceroot + '/' + repodef.repo
                , env
                , title: `npm i for ${repodef.repo}`
              }).then(Tasq.then).catch(Tasq.catch);  
              return p;
            });
        }
      });


      // PB : NOTE -- npm i for client does not complete when NODE_ENV=production 
      // therefore bower doesn't get installed !!! which then fails installing the bower dependenciew !!!
      // We work around this by running npm i for client without any NODE_ENV which probably defualts to development.
      // PB : TODO -- Investigate why NODE_ENF has an impact on npm i !??
      // Second time try also doesnt work.
      // repotasks.push(
      //   () => {
      //     var env = Object.assign({}, process.env)
      //     delete env.NODE_ENV
      //     console.log(`--------------------second time npm i for client--------------------`)
      //     return nodeShellExec(`"${gitbash}"`, ['-c', '"npm i --force"'], {
      //     // return nodeShellExec('npm', ['i --force'], {
      //       inherit: true, shell: true
      //       , cwd: instanceroot + '/' + 'client'
      //       , env
      //       , title: `npm i for client`
      //     }).then(Tasq.then).catch(Tasq.catch)
      //   })

      var bowerRepos = [{ repo : 'client'}];
      bowerRepos.forEach(repodef => {
        repotasks.push(() => {
          console.log(instanceroot + '/' + repodef.repo + '/node_modules/bower/bin/bower');
          // var p = nodeShellExec('node_modules/bower/bin/bower', ['install'], {
          var p = nodeShellExec(`"${gitbash}"`, ['-c', '"node_modules/bower/bin/bower i"'], {

            inherit: true, shell: true
            , cwd: instanceroot + '/' + repodef.repo
            , env: process.env
            , title: `bower i for ${repodef.repo}`
          }).then(Tasq.then).catch(Tasq.catch);
          return p;
        });
      });
      // console.log('rmtasks.length : ' + rmtasks.length)
      return Promise.all(rmtasks).then(() => any(repotasks));
    }).catch(e => {
      console.error(e);
    }).finally(statuslog.finally)

  }
  , 'start': (label) => {
    console.log('Starting Elixir Server.');
    var env = Object.assign({}, process.env); // Shallow clone it.
    // console.dir(env)
    env.NODE_ENV = process.env.NODE_ENV || 'development';
    env.DEBUG = 'loopback:connector:' + dbForLabel(label);
    var cmd = env.NODE_ENV === 'development' ? 'nodemon' : 'node';
    // cmd = 'node'
    cmd = [cmd, ['--inspect=9228', 'elixir/server.js']];
    var childPromise = nodeShellExec(...cmd, {
      // inherit : true,
      shell: true,
      detached: true,
      stdio: 'ignore',
      cwd: instanceroot + '/' + 'elixir-server'
      , env: env
    });

    var child = childPromise.process;
    if (typeof child.pid !== 'undefined') {
      console.log(`started Elixir Server PID(${child.pid}) : NODE_ENV=${process.NODE_ENV} ${cmd}`);
      fs.writeFileSync('.elixir-server.elixir.server.pid', child.pid, {
        encoding: 'utf8'
      });
    }

    // nodeShellExec('node', ['--inspect=9226', ' bin/www'], {
    //   inherit : true, 
    //   shell: true, detached: true,
    //   cwd : 'qms/server',
    //   env: env,
    //   shell : true
    // })

    // nodeShellExec('ember', ['s'], {
    //   // inherit : true, 
    //   shell: true, detached: true,
    //   cwd : 'client/',
    //   env: env
    // })
    console.log('Starting Elixir Client Host.');
    var cmd = ['ember', ['s']];
    var childPromise = nodeShellExec(...cmd, {
      // var childPromise = nodeShellExec('node', ['--inspect=9227', './node_modules/.bin/ember', 's'], {
      // PB : TODO -- ember debugging.
      // inherit : true,
      shell: true,
      detached: true,
      stdio: 'ignore',
      cwd: instanceroot + '/' + 'client'
      , env: env
    });
    // .catch(e=>console.error(e))

    child = childPromise.process;
    if (typeof child.pid !== 'undefined') {
      console.log(`started Elixir Client Host PID(${child.pid}) : NODE_ENV=${process.NODE_ENV} ${cmd}`);
      fs.writeFileSync('.client.server.pid', child.pid, {
        encoding: 'utf8'
      });
    }

  }
  , 'stop': (label) => {
    const kill = treeKill;

    var serverPid = fs.readFileSync('.elixir-server.elixir.server.pid', {
      encoding: 'utf8'
    });
    fs.unlinkSync('.elixir-server.elixir.server.pid');
    console.log(serverPid);
    kill(serverPid);

    serverPid = fs.readFileSync('.client.server.pid', {
      encoding: 'utf8'
    });
    fs.unlinkSync('.client.server.pid');
    console.log(serverPid);
    kill(serverPid);
  }
  , 'model' : () => {
    if (__isElevated) { 
      var tasks = [
        () => {
          var p = nodeShellExec('mklink', [ `${processedArgs._[2]}.json`
              , `..\\..\\node_modules\\chess-server-lib\\common\\models\\${processedArgs._[2]}.json`], {
            inherit: true, shell: true
            , cwd : instanceroot + `/${selectedinstance.instanceName}-server/${selectedinstance.instanceName}/models`
            , title: `mklink  ${processedArgs._[2]}.json ..\\..\\node_modules\\chess-server-lib\\common\\models\\${processedArgs._[2]}.json`
            , env: process.env
          }).catch((e) => { console.error(e); });
          return p;
        }
      ];
      return any(tasks).then(() => {
        fs.writeFileSync('run.done', 'success');
      }).catch(() => {
        fs.writeFileSync('run.done', 'error');
      })
    }
    else return op['runas']()
  }
  , 'use' : () => {
    // use a certain named instance.
    //  Eg : 
    // 1) elxr use elixir
    // 2) elxr use cihsr
    // If environment is not specified defaults to development.
    // 1) NODE=test elxr use elixir

    /*// Steps
    1) Delete Config and Data symlinks
    2) Make Links for config ({{name}}-config-{{node_env}}) and data with the NODE_ENV specified or default to dev 
    3) Iterates all repos and pull all. 'git', ['pull', '--all'].
    4) Iterates all repos and checkout to the ENV specified. 'git', ['checkout', checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV]
    5) Iterates all repos and merge from source configured in mergesource. 'git', ['merge', mergesource],
    */
    var runconfig = { NODE_ENV: selectedinstance.node_env };
    try { runconfig = Object.assign(runconfig, commonjsRequire(instanceroot + '/run.js',"/$$rollup_base$$")); } catch (e) { }
    // We no longer need to check ruans.. ??? if we were initiated from self invoked privileged shell ?
    if (( /*processedArgs.runas && processedArgs.runas !== 'self' &&*/ !processedArgs.force) &&
      runconfig.NODE_ENV && runconfig.NODE_ENV === (selectedinstance.node_env || runconfig.NODE_ENV) &&
      selectedinstance.instanceName && runconfig.use === selectedinstance.instanceName) {

      console.log(`No change detected. Already using requested specs : ${runconfig.NODE_ENV} ${runconfig.use}`);
      if (processedArgs.runas) { fs.writeFileSync('run.done', 'success'); }
      if (existsSync('config') && existsSync('data')){
        return
      }
    }

    var tasks = [
      () => {
        var promise = new Promise((resolve, reject)=>{
          existslink('config', function(err, data){
            if(data) { 
              var p = nodeShellExec('rmdir', ['config'], { inherit: true, shell: true, env: process.env }
              ).catch((err) => { console.log('Ignoring benign error : ' + err); return true; });
              return resolve(p);
            }
            else resolve(false);
          });
        });
        return promise;
      },
      () => {
        var promise = new Promise((resolve, reject)=>{
          existslink('data', function(err, data){
            if(data) { 
              var p = nodeShellExec('rmdir', ['data'], { inherit: true, shell: true, env: process.env }
              ).catch((err) => { console.log('Ignoring benign error : ' + err); return true; });
              return resolve(p);
            }
            else resolve(false);
          });
        });
        return promise;
      },
    ];
    runconfig.NODE_ENV = process.env.NODE_ENV = process.env.NODE_ENV || runconfig.NODE_ENV || 'development';
    if (processedArgs._[1] && runconfig.use !== processedArgs._[1]) runconfig.use = processedArgs._[1];
    if (!runconfig.use) { throw 'unspecifed use not allowed. Please specify chess instance name.' }
    // console.log(process.env.cwd)
    fs.writeFileSync(instanceroot + '/run.js', 'module.exports = ' + JSON.stringify(runconfig));

    // Maps an environment to a branch. Not required if the branch is appropriately named.
    var checkoutMap = { 'development': 'master' };

    var branch = checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV;
    
    var performPullOrCloneForBranch = (def)=>{
      var promise = Promise.resolve(true);
      if (!branch) {
        var dscoverbranchcmd = gitops.getdiscoverbranchcmd(repo);
        
        promise = nodeShellExec.apply(null, dscoverbranchcmd).then(__branch=>{ branch = __branch;})
          .catch((e) => { console.error(e); return { error: true, message: repo } });
  
      }
        
      return promise = promise.then(()=>{ return elxr.getpulltask(def)() }).catch(e => { console.error( 'performPullOrCloneForBranch : Failed ' + e );})
    };

    var performCloneAndCheckout = null;
    // cant use git checkout -b it fails when branch already exists.
    var performCheckout = performCloneAndCheckout = (def) => {if (excludeCheckouts[def.repo]) return Promise.resolve({ 'skipped': true })
      
      return performPullOrCloneForBranch(def).then(()=>{
        nodeShellExec('git', ['checkout', def.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV], {
          // return nodeShellExec('git', ['switch', '-m', '-C', checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV], {
          // inherit : true, shell: true, 
          cwd: instanceroot + '/' + def.repo
          // , stdio : ignore // Use when we want to silence output completely.
          , runas: processedArgs.runas
          , title: `git checkout ${def.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} for ${def.repo}`
        }).then(()=>{ console.log( `SUCCESS : git checkout ${def.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} for ${def.repo}` ); }).catch((e) => { console.error(e); return { error: true, message: def.repo } });
      })
    };

    var mergeSources = {
      'development': null,
      'test': 'master',
      'production': 'master'
    };
    var mergesource = mergeSources[checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV];

    // Checkout is reduced to pull provided the current branch is the targetbranch 
    if(branch === mergesource) performCheckout = (def) => {   
      var dscoverbranchcmd = gitops.getdiscoverbranchcmd(repo);
      return nodeShellExec.apply(null, dscoverbranchcmd).then(__branch=>{ 
        
        if(branch === __branch) return performCloneAndCheckout(def)
        return performPullOrCloneForBranch(def) 
      })
      .catch((e) => { console.error(e); return { error: true, message: repo } })
    };
    // else performCheckout = (def) => { return performPullOrCloneForBranch(def) }

    var performPullAll = (def) => {
      if (excludeCheckouts[def.repo]) return Promise.resolve({ 'skipped': true })
      return nodeShellExec('git', ['pull', '--all'], {
        // inherit : true, shell: true, 
        cwd: instanceroot + '/' + def.repo
        , runas: processedArgs.runas
        , title: `git pull -all for ${checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} ${def.repo}`
      }).catch((e) => { console.error(e); return { error: true, message: def.repo } })
    };
    
    var excludeCheckouts = Object.assign(exludeMergeRepos);
    delete excludeCheckouts[`elixir-config-${runconfig.NODE_ENV}`];
    delete excludeCheckouts[`cihsr-config-${runconfig.NODE_ENV}`];

    var performMerge = (def) => {
      if (exludeMergeRepos[def.repo]) return Promise.resolve({ 'skipped': true })
      return nodeShellExec('git', ['merge', mergesource], {
        inherit: true, shell: true,
        cwd: instanceroot + '/' + def.repo
        , runas: processedArgs.runas
      }).catch((e) => { console.error(e); })
    };
    if(!mergesource || branch === mergesource) performMerge = () => { return Promise.resolve(true) };

    // var performRepoOperation = function(def) {
    //   elevatedRunasRepos.map((repo) => enqueueCheckout({ repo, branch: def.branch, requiresElevation : true }))
    //   return any(gitRepos.map((repo) => performCheckout({ repo, branch: def.branch})))
    // }

    return any(tasks).then(() => {
      var pr = Promise.resolve(true);
      if (!__isElevated)  {
        pr = op['runas']();
        return pr.then(()=>{

          //target is the env is we specify in elxr use command. Default is dev
            //Switch to target branch
          return any(gitRepos.map((repodef) => { return performCheckout({ repo : repodef.repo, branch}).catch(e=>{ console.log(e); }) }   ))
          // pull or clone target branch
          .then(() => {
            if(!mergesource || branch === mergesource) return Promise.resolve(true)
            return any(gitRepos.map((repo) => performPullAll(repo))) 
          })
          // switch to source branch
          .then( () => {
              if(!mergesource || branch === mergesource ) return Promise.resolve(true)  // Dont do anything if there is no source to merge from.
              return any(gitRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch: mergesource}))) 
          })
          //Pull on merge source branch
          .then( () => {
              if(!mergesource || branch === mergesource ) return Promise.resolve(true)
              return any(gitRepos.map((repo) => performPullAll(repo)))
            })
          //Switch to target branch
          .then( () => { 
            if(!mergesource || branch === mergesource ) return Promise.resolve(true)
            return any(gitRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch}))) 
          })
          .then( //Merge source branch to target branch
            () => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(gitRepos.map((repo) => performMerge( repo ))).catch(err => { console.error('error in performMerge ' + err); })
            })
        })
      }
      else {
        tasks = [
          () => {
            // Use junctions to avoid npm package issues
            var p = nodeShellExec('mklink', ['/J', 'config', runconfig.use + '-config' + '-' + process.env.NODE_ENV], {
              inherit: true, shell: true
              , cwd : instanceroot
              , env: process.env
            }).catch((e) => { console.error(e); });
            return p;
          }
        ];
        if (processedArgs._[1]) {
          tasks = tasks.concat(
            [
              () => {
                var p = nodeShellExec('mklink', ['/J', 'data', runconfig.use + '-data'], {
                  inherit: true, shell: true
                  , cwd : instanceroot
                  , env: process.env
                }).catch((e) => { console.error(e); });
                return p;
              }
            ]
          );
        }
  
        return any(tasks).then(()=>{
              // checkout target branch
          return any(elevatedRunasRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch, requiresElevation : true}))) 
            // pull or clone target branch
            .then(() => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(elevatedRunasRepos.map((repo) => performPullAll(repo))) 
            })
            // switch to source branch
            .then( () => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(elevatedRunasRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch: mergesource, requiresElevation : true}))) 
            })
            //Pull on merge source branch
            .then( () => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
                return any(elevatedRunasRepos.map((repodef) => performPullAll({repo : repodef.repo, requiresElevation : true })))
              })
            //Switch to target branch
            .then( () => { 
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(elevatedRunasRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch, requiresElevation : true}))) 
            })
            .then( //Merge source branch to target branch
              () => {
                if(!mergesource || branch === mergesource) return Promise.resolve(true)
                return any(elevatedRunasRepos.map((repodef) => performMerge({ repo : repodef.repo, requiresElevation : true }))).catch(err => { console.error('error in performMerge ' + err); })
            })
            .then(() => {
              fs.writeFileSync('run.done', 'success');
            }).catch(() => {
              fs.writeFileSync('run.done', 'error');
            })
        })
      }

    }).catch(() => {
      fs.writeFileSync('run.done', 'error');
    })

    // Antibiotic stewardship program.
    // 1st use is fine.
    // Max vials dispense
    // 2nd use Pharmacy needs justification Form.
    // Approval after a certain period of time.
  }
  , 'g': () => {
    if (processedArgs.h) {

      console.log('elxr g [modelname] => generate a model named [modelname]');
      console.log('elxr g => regenerate all known models');
      return
    }
    // nodeShellExec('npm', ['init', '-y'], options);
    // nodeShellExec('npm', ['init', '-y'], options);
    // })

    var g = {
      'client': () => {
        // ember new --skip-bower --no-welcome --skip-git -b {{blueprint}} 

        console.info('Creating new ember client named : ' + processedArgs._[2]);
        nodeShellExec('cmd', ['/c', 'ember', 'new', processedArgs._[2]], {
          stdio: ['pipe', process.stdout, process.stderr],
          inherit: true,
          shell: true,
          cwd: path__default['default'].dirname(__dirname),
          env: env
        });
      },

      'modelr': () => {
        var tasks = [
          () => {
            var p = nodeShellExec('"ember"', [
              'g'
              , 'modelr'
              , processedArgs._[2]], {
              inherit: true, shell: true, env: process.env
            }).then(() => {
              console.log('Blueprint generation complete for : ' + processedArgs._[2]);
              return true;
            }).catch((e) => { console.error(e); });
            return p;
          },
          () => {
            var chromePrefsFile = "C:\\chess\\instances\\elixir_01\\data\\Google\\Chrome\\User Data\\chess\\Preferences";
            var chromeprefs = fs.readFileSync(chromePrefsFile, { encoding: 'utf8' });
            chromeprefs = JSON.parse(chromeprefs);
            var previous = chromeprefs.download.default_directory;
            var parentDir = path__default['default'].dirname(__dirname);
            chromeprefs.download.default_directory = parentDir + "\\client\\app\\templates\\components\\resource";
            fs.writeFileSync(chromePrefsFile, JSON.stringify(chromeprefs));
            // PB : TODO -- detect where chrome is installed.
            // PB : TODO -- set the download dir to the place where files are needed.
            var p = nodeShellExec('"C:/Program Files (x86)/Google/Chrome/Application/chrome.exe"', [
              '--user-data-dir="C:\\chess\\instances\\elixir_01\\data\\Google\\Chrome\\User Data"'
              , '--profile-directory="chess"'
              , 'http://localhost:4200/admin/crud/create/' + processedArgs._[2]], {
              inherit: true, shell: true
              , env: process.env
            }).then(() => {
              chromeprefs.download.default_directory = previous;
              fs.writeFileSync(chromePrefsFile, JSON.stringify(chromeprefs));
              return true;
            }).catch((e) => { console.error(e); });
            return p;
          }
          ,
          () => {
            console.log('Browser process should have closed here....');
            return true;
          }
        ];
        any(tasks);

      }

    };

    g[processedArgs._[1]]();
  }
  
  , 'create' : () => { return createInstance(selectedinstance) }

  , 'httpget' : () => {
    // RESTAPI.get({
    //   hostname: 'git.bbh',
    //   // port: 443,
    //   protocol : 'http:',
    //   path: '/',
    //   method: 'GET'
    // }, function(data){ console.log(data)}, function(error){ console.log(error)} )
    return createInstance(selectedinstance)
  }

  , 'getuser' : ()=>{ return prerequisites.git.getuser().then(u=>{ console.log(u);}) }
  , 'switch user' : (tousername)=>{ return GIT['switch user'](tousername) }
};

// elxr cli operations
var noprerequisites = {
    add : true, 'set-url' : true, 'repo-relocate' : true
  , remote : true, 'c' : true, 'h' : true
  , httpget : true, getuser : true
  , 'switch user' : true
  , 'switch' : true
  // , 'undefined' : true
};

var reconfirmcmds = { create : true };

var subcommandlabels = {
    remote : (`remote ${processedArgs._[1] || ''}`).trim()
  , switch : (`switch ${processedArgs._[1] || ''}`).trim()
};

var cmds = {
  remote : {
    // return a interpreted set of arguments for this comd run context.
    interpret() { 
      return { cmd : subcommandlabels['remote'], runchoice : 'c' }  
    }
  }
  , switch : {
    interpret() {
      return { cmd : subcommandlabels['switch'], runchoice : 'c', username : processedArgs._[2]
        , reposerver : __default.reposerver
      }  
    }
    , getPossiblePrompts(){ return { username : true, reposerver : 'http://git.bbh' } } // Requires only one argument...
  }
  , 'switch user' : {
    interpret() {
      return { cmd : subcommandlabels['switch'], runchoice : 'c', username : processedArgs._[2] }  
    }
    , getPossiblePrompts(){ return { username : true } } // Requires only one argument...
  }

  // Flat linear structure. Every subcommand should have a top level 'label'
  , 'users' : {
      // default to the users list
      subcommands : { list : {} }
    , cmdFn : ()=>getCredentials() // default
    , cmd : 'users'
    , noprerequisites : true
  }
  , 'users list' : {
      cmdFn : ()=>getCredentials()
    , cmd : 'users list'
    , noprerequisites : true
  }
};

var elxrcmd = (function(){

  __cmdprototype = function(){};
  function subcommandlabelFor(cmd, sub){ return (`${cmd} ${sub || ''}`).trim() }

  var __cmd = { 
    interpret() { return { cmd : this.cmd } }
    , getPossiblePrompts(){ return {} } // Requires only one argument...
    , cmdFn : ()=>{ throw "Elxr Unknown command."}
    , finalized : true
  };

  function __createO(o){ 
    if(o.finalized) return o;
    var subs = Object.keys(cmds[o.cmd].subcommands || {}); 
    console.log(subs);
    console.log(o);
    subs.forEach(sub=>elxrcmd.create( cmds[subcommandlabelFor(o.cmd, sub)] ));
    
    var created = bbhverse.assign_strict({}, __cmd, cmds[o.cmd], o);
    cmds[o.cmd] = created;
    op[o.cmd] = created.cmdFn;
    noprerequisites[o.cmd] = created.noprerequisites; 
    return created.cmdFn;
  }

  function create(o){ return __createO(o) }

  __cmdprototype.create = create;

  return __cmdprototype; 
})();

elxrcmd.create(cmds['users']);

var interpretrun = function(){

  var cmd = processedArgs._[0];
  var clioverrides = { cmd };   
  processedArgs.node_env ? clioverrides.node_env = processedArgs.node_env 
  : (process.env.NODE_ENV && process.env.NODE_ENV.trim()) 
      ? clioverrides.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) : null;


  return cmds[cmd] ? cmds[cmd].interpret() : (function(){
    processedArgs._[1] ? clioverrides.instanceName = processedArgs._[1]: null;
    // return clioverrides
    cmds[cmd] = {
      interpret() {
        return Object.assign(clioverrides, { cmd, runchoice : 'c' })
      }
      , getPossiblePrompts(){ return { cmd, username : true, password : true, 
        instanceName : true, instanceType : true, reposerver : true } }
    };
    return cmds[cmd].interpret()
  })() 
};

var clioverrides = interpretrun();
console.dir(clioverrides);


var cliname = 'elxr';
var ver = '1.1';
var readme = `
  Command syntax examples

  elxr
    Displays help. Same as elxr h

  elxr i
    Runs interactive propmts to help choose installation options.

  NODE_ENV={{yourenvironment}} elxr {{cmd}} {{instancename}} {{otheroptions}}
    General command syntax.
    Eg: NODE_ENV=development elxr pull elixir

    Note : Although {{instancename}} is generally a positional parameter supplied immediately after the cmd for most cmd's. 
      The specific cmd defines what the value is interpreted as.
      There are several cmds that do not require an {{instancename}} parameter.
        Eg: elxr remote remove origin 
          Git operations or passthrough external commands on all repository folders in you working directory.

  Main objectives.
    elxr cli is a wrapper around other shell commands and api based operations.
    One of the main objetives it achives is ease of use of repeating an individual cmd multiple times on all targets.
      Eg: A git operation like pull can be repeated consistently on a set of git repositories.
  
`;
var help = `
  ${readme}


  # list of commands... please refer dveloper documentation for ${cliname}
  \r\n\t${
    Object.keys(op).join('\r\n\t')
  }
`;

var elxr = {
  help() {
    return source.cyanBright(`
-------------------------------------------------------------------------------
  *** BBH Elixir ***  
-------------------------------------------------------------------------------
  elxr ${ver}
    A cli tool for chess
    ${help}
-------------------------------------------------------------------------------
    `)
  }
  , info() {
    return source.cyanBright(`
-------------------------------------------------------------------------------
  *** BBH Elixir ***  
-------------------------------------------------------------------------------
  elxr ${ver}
    A cli tool for chess
-------------------------------------------------------------------------------
  `)
  }
  , getpulltask(args){

    // def can be an instance config
    // Or an object with many repos and elevated repos
    // Or a single repo ( Either Elevated or normal. )

    
    // USAGE
    // elxr pull elixir origin master
    // elxr pull

    // not all remote branches are setup to be tracked locally (respective remotes and branches). 
    // pull --all is useless. As it fetches all remotes and branches but only merges current branch.  
    // apart from remote tracking branches We are interested in pulling from all remotes and relavant branches.
      // The branch pipline should feed back to master
      //   master -> test -> stage -> release[nnnn] -> production
      //   (master) <= git merge [all remotes] production && git merge [all remotes] release[nnnn]
            // git merge [all remotes] stage && git merge [all remotes] test  && git merge [all remotes] master 

    ({
        remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]  // If branch not specified opearte on the current branch of each working directorys
    });

    // var commands = [
    //     // ['git', ['checkout', __args.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV]]
    //   , 
    // ]

    // var parameters = ['-c', 'for i in `git remote`; do git pull $i ' + branch + '; done;']
    // var pullCmd = [ gitbash
    //   , ['-c', 'for i in `git remote`; do git pull $i ' + branch + '; done;']
    //   , { cwd: instanceroot + '/' + repo, title : 'pull all remotes for ' + branch + '  ' + repo + ' ' + parameters.join(' ') }]



    var def = args || {
      repos : selectedinstance.repos,
      elevated : selectedinstance.elevated
    };

    var elevatedpulltasks = null;
    if(def.repo) {
      // Single repo case.
      if(def.repo.requiresElevation) {
        elevatedpulltasks = function() {
          return performPull(def.repo).then(() => {
            return true;
          }).catch((e) => {
            console.error(e); 
          })
        };
        return 
      }
      else {
        var regularpulltasks = function(){
          var pendingpulls = [];
          pendingpulls.push(performPull(def.repo));
          return Promise.all(pendingpulls).finally(Traq.finally)
        };
      }
      if(elevatedpulltasks) return getTaskWithElevation( { elevatedpulltasks, regularpulltasks} )
      else return getTaskWithoutElevation({ regularpulltasks}) 
    }
    
    // console.log(`-------------------Processing pull for : ${def.repo} ${def.branch}`)
    console.dir(def);

    Object.assign({}, process.env); // Shallow clone it.
    console.log('Running exlr pull : ' + path__default['default'].dirname(__dirname));

    processedArgs.useGitPull || false;

    if(def.elevated || def.repos) {
      if(def.elevated) def.requiresElevation = true;
      else delete def.requiresElevation;
    }
    else {
      if(def.requiresElevation) def.elevated = [def]; 
      else def.repos = [def]; 
    }

    
    var regularpulltasks = function(){ return Promise.resolve(true) };
    if(def.elevated){
      elevatedpulltasks = function() {
        return any(def.elevated.map((def) => performPull(def.repo))).then(() => {
          return true;
        }).catch((e) => {
          console.error(e); 
        })
      };
    }
    if(def.repos) {
      var regularpulltasks = function(){
        var pendingpulls = [];
        def.repos.forEach((def) => { pendingpulls.push(performPull(def.repo)); });
        return Promise.all(pendingpulls).finally(Traq.finally)
      };
    }
    if(elevatedpulltasks) return getTaskWithElevation( { elevatedpulltasks, regularpulltasks} )
    else return getTaskWithoutElevation({ regularpulltasks})
  }
};

function preworkerconfig(){
    // Everything runs after this check is completed. Elevation occurs out of process when needed.
    gitRepos = selectedinstance.repos;
    // gitRepos = ['chess-server-lib'];
  
    // Repositiories that have symlinks that require elevated priviletes in windows to create symlinks
    elevatedRunasRepos = selectedinstance.elevated;
    // Repos that should excluded from merge for releases...
    exludeMergeRepos = selectedinstance.exludeMergeRepos;  
}


// The main elxr cli process
function elxrworker() {

  var __runcmd = function (label) {
    var distinquishedlabel = subcommandlabels[label] || label;
    return op[distinquishedlabel] ? op[distinquishedlabel](processedArgs) : null;
  };


  // --runas
  if (processedArgs.runas) {
    // Weve been asked to run in priviledged mode. Check if we already are privileged.
    return __runcmd('runas')
  }
  else return __runcmd(processedArgs.label || processedArgs._[0] || 'undefined');
}

// function acquireChoices(selectedinstance) {

//   var hasconfig = false;
//   console.warn(chalk.cyan(`
// -------------------------------------------------------------------------------
// Could not locate your preferred configuration (you may not specified it)
// You should fork the default chess configuration to customize and make it 
// your own instance with a named config as 
//   {{yourowninstancename}}-config-{{yourchosenenvironment}} 
// And then run this tool as follows
//   NODE_ENV={{yourchosenenvironment}} elxr i {{yourowninstancename}} 
// OR
// Run this tool with the following command to use a quick start default.
//   elxr --default
// OR
// Choose one of the options below to run interactively.

// We will run your choice at the next prompt.
// -------------------------------------------------------------------------------
//   `))

//   var choices = getInteractionPoints(detectedinstanceoptions, __interactive_prompts) 
//   var todo = any( __interactive_prompts(selectedinstance, choices)  ).then(()=>{ 
//     return initinstances(selectedinstance)
//   })

//   // var prompt = cli.prompter;
//   // return prompt.ask(`Choose an option :
//   //     d) Install the default chess instance. 
//   //         => elxr i chess node_env=development --default
//   //     n) Create your custom new instance interactively
//   //         => elxr i {{instanceName}} node_env={{environment}}
//   //     i) Choose an instance and environment to install
//   //         => elxr i {{instanceName}} node_env={{environment}}
//   //     c) Choose a command to run ( pull, use, i, npmi ... ) <= pull
//   //         => elxr {{cmd}} {{instanceName}} node_env={{environment}}
//   //     h) Help
//   //     q) Quit
//   //       Default <= d
//   //   : `).then((choice) => {
//   //   if (choice && choice === 'd' || !choice) {
//   //     processedArgs._[0] = 'i'
//   //     selectedinstance.instanceName = processedArgs._[1] = processedArgs._[1] || 'chess'
//   //     selectedinstance.node_env = processedArgs.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) || processedArgs.node_env || 'development'
//   //     selectedinstance.reposerver = 'https://git.bbh.org.in'
//   //   }
//   //   else if (choice === 'h') {
//   //     processedArgs._[0] = 'h'
//   //     fs.writeFileSync('run.done', 'noop help');
//   //     console.log(elxr.help()); process.exit()
//   //   }
//   //   else if (choice === 'n' || choice === 'i') {
//   //     var p1 = cli.prompter;
//   //     return p1.ask(`Enter Instance Name ( <= ${selectedinstance.instanceName} ) : `).then(function (instanceName) {
//   //       processedArgs._[0] = 'i'
//   //       selectedinstance.instanceName = processedArgs._[1] = instanceName || selectedinstance.instanceName;
//   //       return p1.ask(`Enter Environment ( <= ${selectedinstance.node_env} ) : `).then(function (node_env) {
//   //         selectedinstance.node_env = processedArgs.node_env = node_env || selectedinstance.node_env
//   //         if (choice === 'n') {
//   //           selectedinstance.reposerver = 'https://git.bbh.org.in'
//   //           console.warn(
//   //             chalk.magenta('No Option Available. Your account may not have privileges. You can request here http://git.bbh.org.in/chess'))
//   //           process.exit();
//   //         }

//   //         return p1.ask(`Enter preferred repo server ( <= ${selectedinstance.reposerver || selectedinstance.reposervers[0]} ) : `).then(function (reposerver) {
//   //           selectedinstance.reposerver = reposerver || selectedinstance.reposervers[0] || 'https://git.bbh.org.in'
//   //         })
//   //       })
//   //     })
//   //   } else if (choice === 'c') {
//   //     var p1 = cli.prompter;
//   //     return p1.ask(`Enter Instance Name ( <= ${selectedinstance.instanceName} ) : `).then(function (instanceName) {
//   //       selectedinstance.instanceName = processedArgs._[1] = instanceName || selectedinstance.instanceName
//   //       return p1.ask(`Enter Environment ( <= ${selectedinstance.node_env} ) : `).then(function (node_env) {
//   //         selectedinstance.node_env = processedArgs.node_env = node_env || selectedinstance.node_env
//   //         return p1.ask(`Enter cmd : 
//   //     p) pull
//   //       Default <= p
//   //     : `).then(function (cmd) {
//   //           if (!cmd || cmd === 'p') {
//   //             processedArgs._[0] = 'pull'
//   //           }
//   //           else processedArgs._[0] = cmd
//   //           return p1.ask(`Enter preferred repo server ( <= ${selectedinstance.reposerver || selectedinstance.reposervers[0]} ) : `).then(function (reposerver) {
//   //             selectedinstance.reposerver = reposerver || selectedinstance.reposerver || selectedinstance.reposervers[0] || 'https://git.bbh.org.in'
//   //           })
//   //         })
//   //       })
//   //     })
//   //   } else {
//   //     console.log(chalk.gray(`Default option not exercised. Please follow manual instructions to customize your instance here http://git.bbh.org.in/chess and try again.`));
//   //     fs.writeFileSync('run.log', ', ' + JSON.stringify({ success: 'quit without execution' }), { 'flag': 'a+' })
//   //     fs.writeFileSync('run.done', 'noop quit');
//   //     process.exit()
//   //   }
//   // })
// }

var mergeObjByKey = function(arrOfObjs, keyName) {

  var keyedDistinct = {};
  var distinctArrOfObjs = []; 

  arrOfObjs.forEach( o => {
    if(o) (keyedDistinct[o[keyName]] || (keyedDistinct[o[keyName]] = []) ).push(o); 
  });
  Object.keys(keyedDistinct).forEach(key => {
    distinctArrOfObjs.push(  bbhverse.assign( ...keyedDistinct[key] ) ); // PB : TODO -- Shallow use utils.assign
  });

  return distinctArrOfObjs;
};

var cacheWriteInstanceConfig = function(chessinstances){
  var instanceName = chessinstances['current_run'].instanceName;
  var node_env = chessinstances['current_run'].node_env;
  chessinstances[instanceName][node_env].repos = mergeObjByKey(chessinstances[instanceName][node_env].repos, 'repo') ;
  chessinstances[instanceName][node_env].elevated = mergeObjByKey(chessinstances[instanceName][node_env].elevated, 'repo') ;
  fs.writeFileSync(instanceroot + '/chessinstances.js', 'module.exports = ' + JSON.stringify(chessinstances, null, 2) + '', { 'flag': 'w' });
};

var configs = (function(){
  return {  
      clusterNodeInstance(selected) { var clusternodename = 'node01'; 
        return __acquireConfig(selected, selected.username, clusternodename
          , selected.instanceName + '-config-' + selected.node_env + `-${clusternodename}`
          , function(e){ console.info('Customized node level config not found. This is not an Error. Will attempt with owner level config.');
              return e; }
        ) 
      }
    , ownerInstnace(selected) { return __acquireConfig(selected, selected.username, null, null
          , function(e){ console.info('Customized user level config not found. This is not an Error. Will attempt global common instance config.');
              return e }
        ) 
      }
    // PB : TODO -- Use the ORG level instance before falling back to common Instance coz common instance may not exist for certain orgs.
    , commonInstance(selected) { return __acquireConfig(selected, defaultRepoOwner
          // , function(e){ console.info('This is probably an error unless the user is asking to create a new instance with this name.') }
      ) }
    , genericChessInstance(selected) { return __acquireConfig(selected) }
  }
})(); 

var eNotImplemented = function(){
  console.error('Not yet implemented');
  process.exit();
};

// PB : TODO -- accept additional arg - an array specifying custom configPriority.
var acquireConfig = function(slections){
  var configPriority = [ 'clusterNodeInstance', 'ownerInstnace', 'commonInstance' /*, 'genericChessInstance'*/ ];
  return any(configPriority.map(cfg => { return function() { return configs[cfg](slections) } } ), true, true).then(()=>{
    return acquireData(slections)
  })
};

var instanceData = (function(){
  return {  
      clusterNodeInstance(selected) { var clusternodename = 'node01'; 
        return __acquireData(selected, selected.username, clusternodename
          , selected.instanceName + '-config-' + selected.node_env + `-${clusternodename}`
          , function(e){ console.info('Customized node level config not found. This is not an Error. Will attempt with owner level config.');
              return e; }
        ) 
      }
    , ownerInstnace(selected) { return __acquireData(selected, selected.username, null, null
          , function(e){ console.info('Customized user level config not found. This is not an Error. Will attempt global common instance config.');
              return e }
        ) 
      }
    // PB : TODO -- Use the ORG level instance before falling back to common Instance coz common instance may not exist for certain orgs.
    , commonInstance(selected) { return __acquireData(selected, defaultRepoOwner
          // , function(e){ console.info('This is probably an error unless the user is asking to create a new instance with this name.') }
      ) }
    , genericChessInstance(selected) { return __acquireData(selected) }
  }
})(); 

var acquireData = function(slections){
  var configPriority = [ 'clusterNodeInstance', 'ownerInstnace', 'commonInstance' /*, 'genericChessInstance'*/ ];
  return any(configPriority.map(cfg => { return function() { return instanceData[cfg](slections) } } ), true, true)
};

// Git Credential storage...
// notepad C:/Program Files/Git/etc/gitconfig
// git config --global --unset credential
// git config --edit --system
// git config --global credential.helper "store --file ~/gitcredentials"
// git credential fill
// git credential-store --file ~/git.store store 
var __acquireConfig = function (selected, owner, clusternodename, configrepo, errHandler) {

  configrepo = configrepo || selected.instanceName + '-config-' + selected.node_env;

  var errorHandler = (e) => {
    if(e.messages.join(' ').match(new RegExp (`fatal: unable to access '${selectedinstance.reposerver}/${owner}/${configrepo}.git/': Failed to connect to .*? port .*? after .*? ms: Timed out`))){
      // console.error('Could not connect to repo server. Timed Out')
      return cliverse.prompt( ['(y)es', '(n)o', '(r)etry'], 'Could not connect to repo server. Timed Out. Would you like to switch server ? (y/n) ', 'y' ).then(propValue => {
        
        if(propValue === 'y') {
          reconfirm = getReconfirmAll();
          return startElxr()
        }
        else if(propValue === 'r'){
          return acquireConfig(selected)
        }
        else process.exit();
      })
    }

    if(e.messages.join(' ').match(new RegExp (`fatal: repository '${selectedinstance.reposerver}/${owner}/${configrepo}.git/' not found`))){
      var choices = { 
        t : `install a new temporary local instance with this name ( will not persist ). 
                Use your own username for additional options. You can request for a username at chess@bbh.org.in )`
      , e : 'exit' };

      if(selectedinstance.username !== 'guest' && selectedinstance.username !== 'demo') {
        choices = bbhverse.assign({
          i : 'create a new instance with this name => will fork the default config under your username'
        , f : 'fork a new instance with this name for yourself for this node from another instance'
        , o : 'fork a new instance with this name for your organization from another instance' // prompt organization name...
        , c : 'create a custom config for yourself for this node' // prompt hostname as nodename
        , p : 'create a custom config for yourself '
          }, choices);
      }

      return cliverse.prompt( choices
        , 'Config for instance not found. Would you like to  ', 'e' ).then(propValue => {
        
        if(propValue === 't') {
          selectedinstance.local = true; return createInstance(selectedinstance)
        }
        if(propValue === 'i') return eNotImplemented()
        if(propValue === 'f') return eNotImplemented()
        if(propValue === 'o') return eNotImplemented()
        if(propValue === 'c') return eNotImplemented() // return createLocalChessInsance(selectedinstance)
        if(propValue === 'p') return eNotImplemented() // return createChessInstance(selectedinstance)
        // if(propValue === 'o') createChessInstance(selectedinstance, orgname)
        else process.exit();
      })
    }
    
    console.warn(e);
    throw e; //('Config acquisition failed.')
  };

  var successHandler = () => {

    var manifestpath = path__default['default'].normalize(selected.root + '/' + selected.instanceName + '-config-' + selected.node_env + '/repo-manifest');
    selectedinstance = commonjsRequire(manifestpath,"/$$rollup_base$$")( null, selectedinstance);
    // Config from server always override merges into selection except for the current selection.
    // PB : TODO -- utils.assign Array merges are non-distinct...
    if(!selectedinstance.repos[0].repo) {
      console.warn('repo manifest has obsolete format. Attempting upgrade.');
      selectedinstance.repos = selectedinstance.repos.map(function(repo){ return { repo } });
    }
    if(selectedinstance.elevated[0] && !selectedinstance.elevated[0].repo) {
      console.warn('elevated repo manifest has obsolete format. Attempting upgrade.');
      selectedinstance.elevated = selectedinstance.elevated.map(function(repo){ return { repo } });
    }
    chessinstances[selected.instanceName][selected.node_env] = selectedinstance = bbhverse.assign(selected, selectedinstance);
    chessinstances[selected.instanceName][selected.node_env].reposervers = Array.from(new Set(chessinstances[selected.instanceName][selected.node_env].reposervers));
    selectedinstance.reposerver = selectedinstance.reposerver || selectedinstance.reposervers[0]; // PB : TODO -- Attempt first one that is available and online...
    cacheWriteInstanceConfig(chessinstances);
    ENV.NODE_ENV = selectedinstance.node_env; 
  };

  return performPull(configrepo, null, owner, errHandler || errorHandler || ((e)=>{ throw e })).then( successHandler )
  .catch( (e)=>{
    // if(e){
      if(Promise.resolve(e) === e) return e;
      console.error(e);
      throw e; // Not a hard error but we need this for bcontinueonfailure
    // }
  })
};

var __acquireData = function (selected, owner, clusternodename, datarepo, errHandler) {

  datarepo = datarepo || selected.instanceName + '-config-' + selected.node_env;

  var errorHandler = (e) => {
    if(e.messages.join(' ').match(new RegExp (`fatal: unable to access '${selectedinstance.reposerver}/${owner}/${datarepo}.git/': Failed to connect to .*? port .*? after .*? ms: Timed out`))){
      // console.error('Could not connect to repo server. Timed Out')
      return cliverse.prompt( ['(y)es', '(n)o', '(r)etry'], 'Could not connect to repo server. Timed Out. Would you like to switch server ? (y/n) ', 'y' ).then(propValue => {
        
        if(propValue === 'y') {
          reconfirm = getReconfirmAll();
          return startElxr()
        }
        else if(propValue === 'r'){
          return acquireConfig(selected)
        }
        else process.exit();
      })
    }

    if(e.messages.join(' ').match(new RegExp (`fatal: repository '${selectedinstance.reposerver}/${owner}/${datarepo}.git/' not found`))){
      var choices = { 
        t : `install a new temporary local instance with this name ( will not persist ). 
                Use your own username for additional options. You can request for a username at chess@bbh.org.in )`
      , e : 'exit' };

      if(selectedinstance.username !== 'guest' && selectedinstance.username !== 'demo') {
        choices = bbhverse.assign({
          i : 'create a new instance with this name => will fork the default config under your username'
        , f : 'fork a new instance with this name for yourself for this node from another instance'
        , o : 'fork a new instance with this name for your organization from another instance' // prompt organization name...
        , c : 'create a custom config for yourself for this node' // prompt hostname as nodename
        , p : 'create a custom config for yourself '
          }, choices);
      }

      return cliverse.prompt( choices
        , 'Data repo for instance not found. Would you like to  ', 'e' ).then(propValue => {
        
        if(propValue === 't') {
          selectedinstance.local = true; return createInstanceData(selectedinstance)
        }
        if(propValue === 'i') return eNotImplemented()
        if(propValue === 'f') return eNotImplemented()
        if(propValue === 'o') return eNotImplemented()
        if(propValue === 'c') return eNotImplemented() // return createLocalChessInsance(selectedinstance)
        if(propValue === 'p') return eNotImplemented() // return createChessInstance(selectedinstance)
        // if(propValue === 'o') createChessInstance(selectedinstance, orgname)
        else process.exit();
      })
    }
    
    console.warn(e);
    throw e; //('Config acquisition failed.')
  };

  var successHandler = () => {

  };

  return performPull(datarepo, null, owner, errHandler || errorHandler || ((e)=>{ throw e })).then( successHandler )
  .catch( (e)=>{
    // if(e){
      if(Promise.resolve(e) === e) return e;
      console.error(e);
      throw e; // Not a hard error but we need this for bcontinueonfailure
    // }
  })
};

var launchpath = path__default['default'].normalize(process.cwd());
var thisscriptdir = path__default['default'].normalize(__dirname); // PB : TODO -- Thisscriptdir could be dislocated when run as a standalone file... We need to detect this where and how we were run.
// The easisest would be to ask for a target directory and default to current dir.... 
var instanceroot = path__default['default'].normalize(thisscriptdir) === path__default['default'].normalize(launchpath) ? path__default['default'].normalize(thisscriptdir + '/..') : launchpath ;

// PB : TODO -- Embed this in the build instead of inlining it.
  // Also attepmt to load from ../chess-config/...
var __default = ((name, options)=>{

  // Default set of users in main repos.
  var users = [
      { username : `${options.username}`, password : `${options.password}` }
    , { username : `chess` }
    // , { username : `baptistdev`, password : 'encrypted' }
    // , { username : `guest`, password : 'encrypted' }
  ];

  // ${options.reposerver} should be used to lookup current config.

  // User can always add more branches and remotes as needed. Mainifest only occupies 
      // well defined namespaces
  var remotes = {
    // these are both fetch and push remotes. Use push - remotes to override push.
      'chess' : { 
          server : `${options.reposerver}`, user : 'chess', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
        , push : 'no-pushing' }
    , 'baptistdev-public' : { 
        server : `https://github.com`, user : 'baptistdev', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      , push : 'no-pushing' }
      

    // Multiple urls dont tell us the current origin which may be 
    // different based on currently available/accessible based on device and client.
    // We just treat them as different remotes and merge as needed.
    // 
    , 'origin' : { 
        server : `${options.reposerver}`, user : '${options.username}', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      }
    , 'origin-public' : { 
        server : `https://git.bbh.org.in`, user : 'chess', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      , push : {
          server : `${options.reposerver}`, user : `${options.username}`, path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} 
        }
      }
    , 'origin-unc' : { 
        server : `//172.16.0.27/repos`, user : '${options.username}', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      }
    // , { `${options.username}` : `https://git.bbh.org.in/${options.username}/elxr.git` }
  };

    // , 'fetch-remotes' : [] // Multiple fetch remotes are not supported by git.
      // We therefore need to use 
      // - a pullall 
      // - or branch alias for multiple remote branch tracking branch strategy.
      // 		-- This is however limited to corresponding branch names 

    // tracking branches.
    // We at least need one branch for each remote that we wish to track.
    // , 'tracking-branches' : [
    //   { master : ['origin/master', 'chess/master'] }
    // ]

  var reposerverinstances = {
      'http://git.bbh' : { users, remotes }
    , 'https://git.bbh.org.in' : { users, remotes, external : true }
    , '//172.16.0.27/repos' : { users, remotes }
    , 'https://github.com' : {
          // We host a miniaml set of repositories in github. 
          get users() { return [{ username : `${this.username}` }]}, username : `baptistdev`
          , remotes : { 
            'baptistdev-public' : { 
              server : `https://github.com`, user : 'baptistdev', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
            , push : 'no-pushing' }
          // , Add other remotes here. 
        }
        , external : true, public : true 
    }
  };
  return {
      reposervers : Object.keys(reposerverinstances)
    , reposerverinstances

    // Common baseline repos for all chess instances.
    , repos : [
       { repo : 'ember-masonry-grid' /*, branch : master*/ } // Default need not be specified.
      , { repo : 'bbhverse' }
      , { repo : 'clientverse' }
      , { repo : 'serververse' }
      , { repo : 'elxr' }
      , { repo : 'ember-searchable-select' }
      , { repo : 'loopback-component-jsonapi' }
      , { repo : 'loopback-jsonapi-model-serializer' }
      , { repo : 'loopback-connector-mysql' }
      , { repo : 'loopback-connector-ds' }
      , { repo : 'chess-server-lib' }
      , { repo : 'ember-service-worker' }
      , { repo : 'ember-service-worker-asset-cache' }
      , { repo : 'ember-service-worker-cache-fallback' }
      , { repo : 'ember-service-worker-index' }
      , { repo : 'ember-sw-client-route' }
      , { repo : 'global-this' }
    ]

    , elevated : [ ]
    , exludeMergeRepos : { }
  }

})(
    '__default' // name
  , { username : 'guest', instanceName : 'chess', node_env : 'development', reposerver : 'https://git.bbh.org.in' } // options
);
// We first load the default and then override with a runconfig if it exists else we override with the interactive prompts.
// Then acquire and reload and replace this default.


var hasElxr = function(path, options, cb) {
  // PB : TOOD -- Navigate up the folder chain to discover the relevant .elxr directory.
  options = options || {};
  

  var tasks = [
      '/elxr' // Is there a subfolder named elxr 
    , '/elxr/.git' // which is self git repository
    , '/elxr/.elxr' // and has .elxr subfolder
    , '/elxr/.elxr/' + __ALIAS__STAMP__  // Which has our stamp.
  ];

  if(options.sync) { return tasks.earlyreduce((acc, tpath)=>{
    var value = existsFolderSync(path + tpath);
    return { value, done : acc && !value };
  }).value }

  if(cb) return cb(null, tasks.earlyreduce((acc, tpath)=>{
    var value = existsFolderSync(path + tpath);
    return { value, done : acc && !value };
  }).value );
  
  return Promise.resolve(tasks.earlyreduce((acc, tpath)=>{
    var value = existsFolderSync(path + tpath);
    return { value, done : acc && !value };
  }).value);
};

var hasElxrSync = function(path){ return hasElxr(path, { sync :true}); };

var detectfromroot = function(root){
  return { root, node_env : path__default['default'].basename(root), instanceName : path__default['default'].basename( path__default['default'].dirname(root) ) }
};
  
var detectLocalInstances = function () {
  console.log(`launchpath = ${launchpath}`);
  console.log(`thisscriptdir = ${thisscriptdir}`);

  // PB : TODO -- !Postpone this.
  console.log(`instanceroot = ${instanceroot}`); // Not yet confirmed...

  // Note : Paths should already be normalized fefore this.

  var root = instanceroot;
  var detected = { root };
  var instanceoptions = [clioverrides];

  return hasElxr(launchpath).then( (elxrCliExists) => {

    // We need a reference to the root director for elxr cli to be properly oriented.
    if (( elxrCliExists && path__default['default'].normalize(launchpath + '/elxr')) === thisscriptdir) {
      // We were run from the proper root with elxr cli in the subfolder. 
      instanceroot = root = launchpath;
      instanceoptions.splice( 0, 0, detected = { root });
      instanceoptions.splice( 0, 0, detectfromroot(root));
    }
    else {
      if(path__default['default'].normalize(launchpath + '/elxr') === thisscriptdir) {
        // elxrCliExists is false -- and yet thiscriptdir is still proper.
        // PB : TODO -- Maybe a warning / abort if for some reason this scriptdir should not be taken over...
        console.error('Warning : detected thisscriptdir as elxr subfolder but not recognized as elixir. git updates might fail.');
        instanceroot = root = launchpath;
        instanceoptions.splice( 0, 0, detected = { root });
        instanceoptions.splice( 0, 0, detectfromroot(root));
      }
      else if (launchpath === thisscriptdir) {
        
        var parentHasElxr = hasElxrSync(launchpath + '/..');
        // PB : TODO -- verify if we have .elxr folder in the parent...
        if(!parentHasElxr) {
          // ! thisscriptdir is not elxr.
          console.error('Invalid run location in subfolder that looks like elxr. We should probably abort as elxr will not sync.');
        }

        // Same directory doesn't mean we are being run from elxr sub  directory. 
        // In standalone build script we may or not be in the same location.
        if (BUILD_VERSION.indexOf('Version: {version} - built on {date}') > -1) {
          // Unbuilt therefore we are in the elxr sub directory.

          instanceroot = root = path__default['default'].normalize(launchpath + '/..');
          instanceoptions.splice( 0, 0, detected = { root });
          instanceoptions.splice( 0, 0, detectfromroot(root));
        }
        else {
          // Built version.
          // We could have been run from the elxr subfolder. Highly likely that the built version isn't the full elxr.
          if(parentHasElxr) {
            // Built version was run from the full elxr subfolder. Should work 
            // PB : TODO -- but we should switch to the full version...
            instanceroot = root = path__default['default'].normalize(launchpath + '/..');
            instanceoptions.splice( 0, 0, detected = { root });
            instanceoptions.splice( 0, 0, detectfromroot(root));
          }
          else {
            instanceroot = root = launchpath;
            instanceoptions.splice( 0, 0, detected = { root });
            instanceoptions.splice( 0, 0, detectfromroot(root));
            // Assume current launchpath is a new instance and create.
            // Figure out the instnace name and environment from parent folders as an alternative option with confirmation if not provided in the arguments.

            // if(clioverrides.instanceName) {
            //   if(clioverrides.node_env) {
            //     instanceroot = root = path.normalize(launchpath + '/' + clioverrides.instanceName + '/' + clioverrides.node_env)
            //     instanceoptions.splice( 0, 0, detected = { root, instanceName : clioverrides.instanceName, node_env : clioverrides.node_env })
            //     // instanceoptions.splice( 0, 0, detectfromroot(root)) // This can be an option but is unnecessary unless a confirmation is provided.
            //     // also folder names may have no relation to the actual instanceName and instanceType coz we need to have many 
            //       // eg : floder name can be elixir01 but instance name is elixr
            //   }
            //   else {
            //     instanceroot = root = path.normalize(launchpath + '/' + clioverrides.instanceName + '/' + 'development')
            //     instanceoptions.splice( 0, 0, detected = { root, instanceName : clioverrides.instanceName, node_env : 'development' })
            //     instanceoptions.splice( 0, 0, detectfromroot(root)) // A recessive option only.
            //   }
            // }
            // else {
            //   instanceroot = root = launchpath;
            //   if(clioverrides.node_env) {
            //     instanceoptions.splice( 0, 0, detected = { root, node_env : clioverrides.node_env })
            //     instanceoptions.splice( 0, 0, detectfromroot(root))
            //   }
            //   else {
            //     // Nothing was specified... We only have one option from root.
            //     instanceoptions.splice( 0, 0, detected = detectfromroot(launcpath))
            //   }
            // }
          }
        }
      }
      else {
        if(elxrCliExists) {
          instanceroot = root = launchpath;
          instanceoptions.splice( 0, 0, detected = { root });
          instanceoptions.splice( 0, 0, detectfromroot(root));
        }
      }
    }
   
    instanceroot = detected.root;
    __default.root = root;
    clioverrides.root = clioverrides.root || root; 
    
    // Resolves empty array when No known instances detected.
    return Promise.resolve(instanceoptions)
  })

};

var getReconfirmAll = ()=>{return { instanceName : true, instanceType : true, reposerver : true, username : true, password : true } };
if(clioverrides.reconfirm) {
  var reconfirm = getReconfirmAll();
}
else { var reconfirm = {}; }

var shouldPrompt = function(k, possiblePrompts, target){
  return ((possiblePrompts[k] !== undefined && possiblePrompts[k] !== null) && target[k] !== possiblePrompts[k] 
      || (possiblePrompts[k] === undefined || possiblePrompts[k] === null) && (target[k] === undefined || target[k] === null) 
      || reconfirm[k])
};

var getBoundEachPrompt = function(target, possiblePrompts, promptables, choices, promptsfilter) {
  return function(prompts, k, i, a){
  
    
    // No local instances config found. We use a default initialized instance available in selectedinstance
    // Confirm those that were not supplied as user choices in runtime args and proceed to reattempt.
    // PB : TODO -- selectedinstance === __default check to prompt everything...
    if(  shouldPrompt(k, possiblePrompts, target) ) {
      delete reconfirm[k];
      // console.log(k)
      // console.dir(possiblePrompts); //console.dir(target)
      prompts.push(async ()=>{ 
        // PB : NOTE -- Important in async cases when this needs to be in the same state as when it was invoked.
          // We take a snapshot... Shallow.. !! If required deep should be used based on use case. 
          // If latest altered state is required we can reerence this directly.
        // var asyncthis = Object.assign(this); 
        promptables[k].choices = choices[k]; 
        Object.defineProperty(target, k, getPromptableAsyncPropDescriptor(k, promptables[k]));
        return await target[k] 
      });
    }
    delete possiblePrompts[k]; // PB : TODO We should keep this around instead of deleting so we can do a second pass if required.
    return prompts
  }
};

var __interactive_prompts = function( target, choices, promptsfilter ){

  Object.defineProperty(target, 'node_env', { get : function(){ return this.instanceType } });

  var interactionpoints = {
    runchoice : {
        label :  
        `Choose an option :
        d) Install the default chess instance. 
            => elxr i chess node_env=development --default
        n) Create your custom new instance interactively
            => elxr i {{instanceName}} node_env={{environment}}
        i) Choose an instance and environment to install
            => elxr i {{instanceName}} node_env={{environment}}
        c) Choose a command to run ( pull, use, i, npmi ... ) <= pull
            => elxr {{cmd}} {{instanceName}} node_env={{environment}}
        h) Help
        q) Quit
        : `
        , choices : []
        , defaultchoice : 'c'
        , interpret : function(choice){
          var interpret_map = {
            d : function(){
              processedArgs._[0] = 'i';
              target.instanceName = processedArgs._[1] = processedArgs._[1] || 'chess';
              target.node_env = processedArgs.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) || processedArgs.node_env || 'development';
              target.reposerver = 'https://git.bbh.org.in';
            }
            , n : function() { processedArgs._[0] = 'i'; }
            , i : function() { processedArgs._[0] = 'i'; }
            , c : async function() {
              Object.defineProperty(this, 'cmd', getPromptableAsyncPropDescriptor('cmd', { 
                label : `Enter cmd : 
                p) pull
                  Default <= p
                : `
                , defaultchoice : 'pull'
                }
              ));

              var cmd = await target['cmd'];
              if (!cmd || cmd === 'p') { target['cmd'] = processedArgs._[0] = 'pull'; }
              else target['cmd'] = processedArgs._[0] = cmd;
              return cmd;
            }
            , h : function() { console.log(elxr.help()); process.exit(); }  // PB : TODO -- Why do we need log.
            , q : function() { process.exit(); }
          };
          var __interpreter = interpret_map['c'];
          // if(!choice) return interpret_map['c']() // This should not happen prompter should always give us a default choice.
          if(interpret_map[choice]) __interpreter = interpret_map[choice];
  
          return __interpreter.call(target)
        }
      }
    , instanceName : { label : `Enter Instance Name ( <= ${target.instanceName || 'chess'} ) : `
      , choices : choices['instanceName'], defaultchoice : 'chess'}
    , instanceType : { label : `Enter Instance Type ( <= ${target.instanceType || 'development'} ) : `
      , choices : choices['instanceType'], defaultchoice : 'development'}
    , reposerver   : { label : `Enter Repo Url ( <= ${target.reposerver || 'https://git.bbh.org.in'} ) : `
      , choices : choices['reposerver'], defaultchoice : 'https://git.bbh.org.in'}
    
    , get username()  { return { label : `Enter User Id for ${target.reposerver} ( <= ${target.username || 'chess'} ) : `
        , choices : choices['username'], defaultchoice : 'chess'} }
    , get password()  { return { label : `Enter Password for ${target.username} @ ${target.reposerver} ( <= ${target.password || ''} ) : `
        , choices : choices['password'], defaultchoice : '***'} }
    , get email()  { return { label : `Enter Email for ${target.username} @ ${target.reposerver} ( <= ${target.email || ''} ) : `
        , choices : choices['email'], defaultchoice : 'guest@bbh.org.in'} }

  };

  
  function getPromptKeys() {
    if(! (processedArgs.label || processedArgs._[0]) ) return Object.assign({}, interactionpoints);
    
    return promptkeys
  }
  var eachPrompt = getBoundEachPrompt( target, getPromptKeys() , interactionpoints, choices);
  return   Object.keys(promptsfilter || interactionpoints).reduce(eachPrompt, [])
};


var downloadsdir = '../Downloads';
var prerequisites = [
  {
    shellcmd: 'git',
    name : 'git',
    url: 'https://github.com/git-for-windows/git/releases/download/v2.31.0.windows.1/Git-2.31.0-64-bit.exe'
    , installer: 'Git-2.31.0-64-bit.exe'
    , installcmd: ['cmd', ['/c', 'start',
      '/WAIT', path__default['default'].resolve(downloadsdir + '/' + 'Git-2.31.0-64-bit.exe')
      , '/VERYSILENT'
      // , '/MERGETASKS=!runcode' // This is required only for vscode...
    ]]
    , preinstallsteps: function() {
      var steps = [
        () => {
          if (!existsSync(downloadsdir + '/' + this.installer)) {
            return nodeShellExec(`${selectedinstance.root}/.elxr/run-${runtimestamp}/download.bat`, [this.url, downloadsdir + '/' + this.installer])
          }
          else return Promise.resolve(true)
        }
      ];
      var prompts = this.getuser(null, ()=>{
        // console.log('preinstallsteps')
        // var gitUser = 'guest';
        // var gitEmail = 'guest@bbh.org.in';
        // var prompts = [];
        // prompts.push( ()=>{ return cli.prompt(choices['username'], 'git user name').then(gituser => gitUser = gituser) } )
        // prompts.push( ()=>{ return cli.prompt(choices['useremail'], 'git user email').then(gitemail => gitEmail = gitemail) } )
  
        // console.log('prompting in preinstallsteps')
        // return any(prompts).then(()=>{
        //   var steps = [
        //       ['git', ['config', '--global', '--add', 'user.name', `${gitUser}`]]
        //     , ['git', ['config', '--global', '--add', 'user.email', `${gitEmail}`]]
        //   ]
        //   return any(steps.map(getshelltask)).then(() => { 
  
        //   })
        // });

        return Promise.resolve(true)
      });
      
      return any([any(steps), prompts])
    }
    , installsteps: function () {
      return any([this.installcmd].map(getshelltask))
    }
    , postinstallsteps: function(err, users){
      return this.getuser(null, (err, data)=>{
        // ignore err and proceed with data as guest.
        console.dir(data);
        if(data && data.length === 1 && !shouldPrompt('username', promptkeys, selectedinstance)  ) {
          return username = data[0];
        }
        
        data = data || ['guest'];
        choices['username'] =  Array.from( new Set( data.concat( (choices['username'] || []) )) );

        console.log('prompting in postinstallsteps');

        var username = 'guest';
        var email = 'guest@bbh.org.in';
        var password = '***';
        
        return any( getInteractionPoints(selectedinstance, promptkeys, { username, password, email})  ).then(()=>{
          if(!data.find(e => e === selectedinstance.username)) {
            var steps = [
                ['git', ['config', '--global', '--add', 'user.name', `${username}`]]
              , ['git', ['config', '--global', '--add', 'user.email', `${email}`]]
            ];
            return any(steps.map(getshelltask)).then(() => { 
  
            })
          }
          else {
            return Promise.resolve(true)
          }
        });
      })
    }
    , install: function () {
      return any([ /*this.preinstallsteps,*/ this.installsteps.bind(this), this.postinstallsteps.bind(this)])
    }
    , verifyAndInstall : function(){
      return getTaskCheckExists(this.shellcmd, { ignorefailures: true })().then((exists) => {
        if(exists) {
          // return any(['git', ['config', '--global', '-l']].map(getshelltask))
          return this.postinstallsteps.bind(this)()
        }
        return this.install();
      });
    }
    , getuser : function(repo, onResult){

      var __onResult = onResult || function(e, data){
        data = data || [];
        choices['username'] =  Array.from( new Set( data.concat( (choices['username'] || []) )) );
        // console.dir(choices)
        return data[0]
      };
 
      var globalOrLocal = '--global';
      if(repo) globalOrLocal = '--local';

      return any([['git', ['config', globalOrLocal, '--get-all', 'user.name']]].map(getshelltask)).then((result)=>{
        // not yet configured.
        if(!result.success) return __onResult(result)
        else {
          var users = result.messages[0].trim().split('\n');
          if(users.length === 0 ||
              users.length === 1 && users[0] === 'guest') {
            
            return __onResult(result)
          }
          else {
            return __onResult(null, Array.from( new Set( users ) ) ); }// PB : TODO == We should probably prompt with all the users available for selection ! 
        }
      })
      .catch((e)=>{ 
        console.log(e); 
        return __onResult(e)
      })
    }
  }
  ,
  {
    shellcmd: 'node',
    name : 'ndoe',
    url: 'https://nodejs.org/dist/v14.16.0/node-v14.16.0-x64.msi'
    , installer: 'node-v14.16.0-x64.msi'
    , installcmd: ['MSIEXEC.exe', ['/i'
      , path__default['default'].resolve(downloadsdir + '/' + 'node-v14.16.0-x64.msi')
      , 'ACCEPT=YES', '/passive']]
    , install : function() { return any([this.installcmd].map(getshelltask)).then(() => { }) }
  }
];
for(var i$1=0; i$1<prerequisites.length; i$1++) {
  prerequisites[prerequisites[i$1].name] = prerequisites[i$1];
}

prerequisites.forEach(p=>{ prerequisites[p.shellcmd] = p; });

function ensureDirectoryExistence(filePath) {
  var dirname = path__default['default'].dirname(filePath);
  if (fs.existsSync(dirname)) {
    return filePath;
  }
  ensureDirectoryExistence(dirname);
  fs.mkdirSync(dirname);
  return filePath;
}

var mainTasks = [];
function verifyAndInstallPrerequisites() {
  fs.writeFileSync(ensureDirectoryExistence(path__default['default'].normalize(`${selectedinstance.root}/${downloadsdir}/readme.txt`)), `${getVersion()} Your local downloads for this instance`);
  
  // PB : TODO include and build from files... using rollup..
  var downloadbatch =
    `::**************************************************************************
  :Download_ <url> <File>
    Powershell.exe ^
    $AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'; ^
    [System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols; ^
    (New-Object System.Net.WebClient).DownloadFile('%1','%2')
  exit /b
  ::**************************************************************************`;
  fs.writeFileSync(`${selectedinstance.root}/.elxr/run-${runtimestamp}/download.bat`, downloadbatch);

  
  var windowselevate =
    `     
      <html><HTA:APPLICATION  ID="windowselevate" icon="#"/>
      <script language="vbscript">
        document.title = "elxr control panel"
        self.ResizeTo 200,600
        
        Sub Window_Onload
        self.MoveTo (screen.availWidth - (document.body.clientWidth + 40)),10
        End Sub

        Set objShell = CreateObject("WScript.Shell")
        Set objENV = objShell.Environment("Process")
        dim NODE_ENV 
        NODE_ENV = objENV("NODE_ENV")
      </script>

      <script language="javascript">
        //WINDOWSTATE="minimize" SHOWINTASKBAR="no" SYSMENU="no" CAPTION="no"
        // https://devblogs.microsoft.com/scripting/how-can-i-pass-command-line-variables-to-an-hta-when-it-starts/
        // alert(windowselevate.commandLine)
        var args = windowselevate.commandLine.split('"').slice(3);
        // alert(args)
        var processedArgs = { _ : [] }
        var namedArgs = [];
        for(var item in args){
          if(args[item].charAt(0) === '-'){ 
            namedArgs.push(args[item])
            var split = args[item].split('=');
            processedArgs[split[0].slice(2)] = split[1] || true;
          } 
          else processedArgs._.push(args[item]);
        }
        // args = args.forEach(function(item){ })
        // alert('processedArgs._ : ' + processedArgs._);
        // alert(processedArgs.runas);
        
        // PB : TODO -- Convert all the cli args back to string.
        var cargs = (processedArgs.debug ? '--inspect-brk=9228' : '') + ' elxr ' + processedArgs._.join(' ') + ' ' +  namedArgs.join(' ');
        // alert(cargs)
        var shell = new ActiveXObject('shell.application'); 
        // alert('launching node privilged. ' + processedArgs['nodepath']) 
        // shell.ShellExecute('where', 'node', '', '', 10);
        // shell.ShellExecute('cmd.exe', '/k notepad.exe', '', 'runas', 1);
        // shell.ShellExecute('cmd.exe ', '/k node "' + cargs + '"', '', 'runas', 1);
        shell.ShellExecute('node', cargs, '', 'runas', 1);
        // shell.ShellExecute(processedArgs['nodepath'], cargs, '', 'runas', 1);
        var fso = new ActiveXObject('Scripting.FileSystemObject');
        
        window.onload = function() {
          document.body.style.backgroundColor = 'black';
          document.body.style.fontFamily = 'arial';
          var log = document.createElement('div');
          log.innerHTML='Please Wait';
          function l(msg){ log.innerHTML+= msg; };
          log.style.color = 'blue';
          log.style.width = '95%';
          log.id = 'log';
          document.body.appendChild(log);  
          
          l('<Br/>Current config : ')
          l('<Br/>NODE_ENV = ' + NODE_ENV)
          l('<Br/>cmd = ' + processedArgs._[0])
          processedArgs._[1] === 'use' ? l('<Br/>using = ' + processedArgs._[2]) : null;
          l('<Br/><Br/>')
          
          var timer = function(){
            l('.');
            if(fso.FileExists("run.done")) close();
            else window.setTimeout(timer, 1000);
          };
          window.setTimeout(timer, 3000);
        };
        
      </script>
      </html>
    
    `;
  fs.writeFileSync(`${selectedinstance.root}/.elxr/run-${runtimestamp}/windowselevate.hta`, windowselevate);

  var downloadtasks = [];
  var installtasks = [];
  prerequisites.forEach(preq => {
    downloadtasks.push(getTaskCheckExists(preq.shellcmd, { ignorefailures: true })().then((exists) => {
      if (exists) console.log(`${preq.shellcmd} exists`);
      else {
        console.log(`${preq.shellcmd} is not installed`);
        return preq.preinstallsteps.call(preq).then(() => {
          installtasks.push(preq.install.bind(preq));
        })
      }
    }));
  });
  return Promise.all(downloadtasks).then(() => { return any(installtasks) })
}

var getPromptableAsyncPropDescriptor = function(propName, promptable){
  return {
    get (){
      return cliverse.prompt( promptable.choices, promptable.label, promptable.defaultchoice ).then(propValue => {
        
        var asyncprop = Promise.resolve(propValue);
        if(promptable.interpret){
          asyncprop = promptable.interpret(propValue); 
        }

        return asyncprop.then(
          ()=>{
            Object.defineProperty(this, propName, {
              value: propValue,
              writable: true,
              configurable : true,
              enumerable : true
            });
            return propValue
          }
        )
      })
    }
    // , set (propValue){
    //   Object.defineProperty(this, propName, {
    //     value: propValue,
    //     writable: true, // PB : TODO -- Use this to fix value permanently until run is over.
    //     configurable : true,
    //     enumerable : true
    //   })
    //   return propValue;
    // }
    , configurable : true
    , enumerable : true
  }
};




function acquirelocalinstances(selected){
  // utils.assign is used to cleanup duplicates...
  var chessinstances = bbhverse.assign(commonjsRequire(path__default['default'].normalize(selected.root + '/chessinstances.js'),"/$$rollup_base$$"));
  return chessinstances
}

function findlocalinstances(chessinstances, instanceoptions){
  // We can expect a .elxr at each level.
    ['' /* instanceroot */, '../' /* instanceTypes or node_env */, '../..' /* instanceNames */].
      earlyreduce( ( value, p, i, a )=>{
        var localinstancesPath = `${instanceroot}/${p}.elxr`;
        if(existsSync( localinstancesPath )) {
          try {
            var chessinstances = acquirelocalinstances( { localinstancesPath } );
            return Object.keys(chessinstances).earlyreduce( ( value, instanceName) => {
                return Object.keys(chessinstances[instanceName]).earlyreduce( (value, instanceType) => { 
                      if(  path__default['default'].normalize(chessinstances[instanceName][instanceType].root) === path__default['default'].normalize( instanceroot) ) {
                        instanceoptions.splice( 0, 0, chessinstances[instanceName][instanceType]);
                        return {
                            value : chessinstances[instanceName][instanceType]
                          , done : true
                        };
                      }
                    })
                })
          }
          catch(e){ 
            return { }
          }
        }
        else return { }
      }
    );
}


// function updateselection(selected) { selectedinstance = utils.assign(selectedinstance, selected) }
var selectedinstance = null;
var chessinstances = { current_run : {} };
var promptkeys = { 
  cmd : processedArgs._[0] || 'pull'
  // Try not to prompt anything unless absolutely necessary or reconfirm is forced.
  //   'instanceName' : true
  // , 'node_env' : true 
  // , username : ''
  // , runchoice : 'c'
}; 
// promptkeys.runchoice = promptkeys.cmd ? 'c' : undefined

function createLocalChessInstance( cfg ){ 
  // return createInstance(cfg)
  reconfirm = getReconfirmAll();
  var inst = {};
  var __new = Object.assign({}, __default, cfg);
  inst[cfg.node_env] = __new; return inst; 
}

var choices = {
    'instanceName' : []
  , 'reposerver' : []
  , 'instanceType' : []
  , username : ['guest', 'chessdemo', 'demo']
};

var getInteractionPoints = function(detectedinstanceoptions, possiblePrompts, promptsfilter){

  var instances = [];
  var reposervers = [];
  var instanceNames = [];
  var instanceTypes = ['development', 'production'];
  Object.keys( chessinstances).forEach(instanceName => {
    if(instanceName === 'current_run') return;
    Object.keys( chessinstances[instanceName] ).forEach(node_env=>{
      var instance = chessinstances[instanceName][node_env];
      reposervers = reposervers.concat(instance.reposervers);
      if(instance.reposerver) reposervers.push(instance.reposerver);
      instances.push(instance);
      instanceTypes.push(instance.node_env);
      instanceNames.push(instance.instanceName);
    });
  });
  instances = instances.concat(detectedinstanceoptions);

  if(selectedinstance['instanceName']) instanceNames.push(selectedinstance['instanceName']);
  if(possiblePrompts['instanceName']) instanceNames.push(possiblePrompts['instanceName']);
  if(selectedinstance['reposervers'])  reposervers = reposervers.concat(selectedinstance['reposervers']);
  
  choices['instanceName'] =  Array.from( new Set(instanceNames.concat(choices['instanceName'])) );
  choices['reposerver'] =  Array.from( new Set(reposervers.concat(choices['reposerver'])) );
  choices['instanceType'] =  Array.from( new Set(instanceTypes.concat(choices['instanceType'])) );

  return __interactive_prompts(selectedinstance, choices, promptsfilter) 
};

var detection_state = {
  localInstanceDetected : false
};
const RESTAPI = (function(){

  // Singleton
  function RESTAPI(){}
  // RESTAPI.create = RESTAPI; // Returns the one singe instance which is the class itself
  // const options = {
  //   hostname: 'whatever.com',
  //   port: 443,
  //   path: '/todos',
  //   method: 'POST',
  //   headers: {
  //     'Content-Type': 'application/json',
  //     'Content-Length': data.length
  //   }
  // }
  RESTAPI.method = function(options, resolve, reject){
    var __method = function() {
      options.headers = options.headers || { 'Content-Type': 'application/json' };
      if(options.payload) {
        const data = new TextEncoder().encode( JSON.stringify(options.payload) );
        options.headers = options.headers || {
          'Content-Type': 'application/json',
          'Content-Length': data.length
        };
      }
      if(!options.authenticatepost) options.headers.Authorization = `token ${usertokens[options.username]}`;

      var acquirer = getHTTPorS(options);    
      const req = acquirer.request(options, res => {
        if (res.statusCode < 200 || res.statusCode >= 300) {
          return reject(new Error('statusCode=' + res.statusCode));
        }
        var body = [];
        // res.setEncoding('utf8');
        res.on('data', function(chunk) {
            body.push(chunk);
        });
        res.on('end', function() {
            try {
                body = JSON.parse(Buffer.concat(body).toString());
            } catch(e) {
                reject(e);
            }
            resolve(body);
        });
      });
      
      req.on('error', error => {
        console.error(error);
        reject(error);
      });
      
      if(options.payload) req.write(data);
      req.end();
    };

    if(!options.authenticatepost && !usertokens[options.username]) {
      RESTAPI.authenticate(options, function(tokenresp){ 
        usertokens[options.username] = tokenresp.sha1;
        __method();
      },
      function(err){ throw err}
      );
    }
    else __method();
  };

  RESTAPI.post = RESTAPI.method;

  var usertokens = {};

  RESTAPI.authenticate = function(options, resolve, reject){
    options.headers = options.headers || { 'Content-Type': 'application/json' };

    if(!usertokens[options.username]) {
      // Authenticate and acquire token.
      // https://git.bbh/api/v1/users/<username>/tokens
      // curl -XPOST -H "Content-Type: application/json"  -k -d '{"name":"demo"}' -u demo:demo123 http://git.bbh/api/v1/users/demo/tokens
      var _options = Object.assign({}, options);
      // _options.username = 'demo'
      // _options.password = 'demo123'
      _options.method = 'POST';
      _options.headers.Authorization = `Basic ${Buffer.from(`${_options.username}:${_options.password}`).toString('base64')}`;  
      _options.path = `/api/v1/users/${_options.username}/tokens`;
      _options.authenticatepost = true;

      var postoptions = { name : _options.username };
      delete _options.username;
      delete _options.password;
      _options.payload = postoptions;
      RESTAPI.post( _options, function(tokenresp){ 
          // tokenresp = JSON.parse(tokenresp)
          usertokens[options.username] = tokenresp.sha1;
          resolve(tokenresp);
        },
        function(err){ reject(err); }
      );
    }
    else resolve(tokenresp.sha1);
  };
  
  RESTAPI.get = RESTAPI.post = RESTAPI.method;

  return RESTAPI
})();

var getHTTPorS = function(options){ return options.protocol.startsWith('https') ? https__default['default'] : http__default['default']; };

const GITEA = (function(){

  function GITEA(){}
  GITEA.repository = {
    fork( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      // forkoptions = { owner : httpoptions.username, repo : {{reoptoFork}} }
      // giteaoptions = {
        // organization	string
            // --- organization name, if forking into an organization
        // }
      //  http://try.gitea.io/api/v1/repos/{owner}/{repo}/forks
      httpoptions.path = `/api/v1/repos/${cmdoptions.owner}/${cmdoptions.repo}/forks`;
      httpoptions.method = 'POST';
      httpoptions.payload = giteaoptions;
      return RESTAPI.post(httpoptions, resolve || function(){}, reject || function(){} )
    }
    , updateattributes( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      httpoptions.path = `/api/v1/repos/${cmdoptions.owner}/${cmdoptions.repo}`;
      httpoptions.method = 'PATCH';
      httpoptions.payload = giteaoptions;
      return RESTAPI.post(httpoptions, resolve || function(){}, reject || function(){} )
    }
  };

  GITEA.user = {
    getuser( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      // ​/users​/{username} // Get a user
      httpoptions.path = `/api/v1/users/${httpoptions.username}`;
      httpoptions.method = 'GET';
      return RESTAPI.get(httpoptions, giteaoptions, resolve || function(){}, reject || function(){} )
    }
  };

  return GITEA
})();

// Wrapper for Git shell operations. Some meta operations will map to a bunch of GIT commands.
const GIT = (function(){
  function GIT(){}

  Object.assign(GIT, {
    'switch user'(username){
      var server = new URL(selectedinstance.reposerver);
      
      return GITEA.user.getuser({ hostname : server.host, protocol : server.protocol
        , username : selectedinstance.username, password : selectedinstance.password
      }).then(()=>{
        return nodeShellExec('git', ['config', '--replace-all', 'user.name', username],
          {
            inherit: true, shell: true,
            env: process.env
            , cwd: instanceroot + '/' + repo
            , runas: processedArgs.runas
            , title: `'git', ${['config', '--replace-all', 'user.name', username].join(' ')}`
          })
        }
      )
      .catch(e => {
        console.error(e + 'Could not switch. Probably no such user.');
      })

    }
  });

  return GIT
})();

function createInstance(target, source) {

  var sourceinstance = source || target;
  console.dir(sourceinstance);
  var args = {
      remotebase : sourceinstance.reposerver + '/chess/'
    , sourcerepo : sourceinstance.repo || 'chess-config'
    , targetrepo : `${target.instanceName}-config-${target.instanceType}${target.nodeName ? ('-' + target.nodeName) : ''}`
  };

  if(sourceinstance.local) {

    var options = {
      inherit: true, shell: true,
        env: process.env
      , cwd : instanceroot 
      , runas: processedArgs.runas
    };
    var cmdseq = [ 
      ['git', ['clone', `${args.remotebase}${args.sourcerepo}`, `${args.targetrepo}`], options]
    ];
    return any(cmdseq.map(getshelltask)).then(() => {  return true })
  }
  else {    
    // http://try.gitea.io/api/v1/org/{org}/repos
    
    if(source.reposerver !== target.reposerver && source.username !== target.username) {
      throw 'createInstance is possible only within the same repository server.'
    }

    var server = new URL(target.reposerver);
    return GITEA.repository.fork( { hostname : server.host, protocol : server.protocol
          , username : target.username, password : target.password
        }
        // , { repo : `${selectedinstance.instanceName}-config-${selectedinstance.instanceType}`}
        , { repo : `${args.sourcerepo}`, owner : `${target.username}` }, {}, function( repository ){
          return GITEA.repository.updateattributes( { 
                  hostname : server.host, protocol : server.protocol
                , username : target.username, password : target.password
              }
              , { repo : `${args.sourcerepo}`, owner : `${target.username}` }
              , { name : `${args.targetrepo}`}
            )
        }
      )
  }
  
  // GITEA.repository.updateattributes( { 
  //       hostname : server.host, protocol : server.protocol
  //     , username : selectedinstance.username, password : selectedinstance.password
  //   }
  //   , { repo : `chess-config`, owner : selectedinstance.username }
  //   , { name : `${selectedinstance.instanceName}-config-${selectedinstance.instanceType}${selectedinstance.nodeName ? '-' + selectedinstance.nodeName : ''}`}
  // )
   
  // return selectedinstance
}
function initinstances(selected_overrides) {
  var root = selected_overrides.root; // We should always have this coz we are running at some place which is fixed by detectLocalInstances.

  var instanceName = selected_overrides.instanceName
    || clioverrides.instanceName
    // || processedArgs._[1] 
    || chessinstances.current_run.instanceName; 
    
  var node_env = selected_overrides.node_env 
    || clioverrides.node_env
    // || processedArgs.node_env
    || chessinstances.current_run.node_env;

  var reposerver = selected_overrides.reposerver 
    || clioverrides.reposerver
    // || processedArgs.node_env
    || chessinstances.current_run.reposerver;
  
  if(!instanceName) {
    promptkeys['instanceName'] = instanceName = chessinstances.current_run.instanceName = promptkeys['instanceName'] || __default.instanceName;
    promptkeys['node_env'] = node_env = chessinstances.current_run.node_env = promptkeys['node_env'] || __default.node_env;
    promptkeys['reposerver'] = reposerver = chessinstances.current_run.reposerver = promptkeys['reposerver'] || __default.reposervers[0];
  }

  if(!node_env) {
    promptkeys['node_env'] = node_env = chessinstances.current_run.node_env = promptkeys['node_env'] || __default.node_env;
    promptkeys['reposerver'] = reposerver = chessinstances.current_run.reposerver  = promptkeys['reposerver'] || __default.reposervers[0];
  }

  if(!reposerver) {
    promptkeys['reposerver'] = reposerver = chessinstances.current_run.reposerver  = promptkeys['reposerver'] || __default.reposervers[0];
  }

  chessinstances[instanceName] = chessinstances[instanceName] || createLocalChessInstance( { 
    instanceName, node_env, root : selected_overrides.root, reposerver : selected_overrides.reposerver /* promptkeys['reposerver'] */ } );
  chessinstances['current_run'] = { instanceName: instanceName, node_env, reposerver, root };

  if(path__default['default'].normalize(selected_overrides.root) !== path__default['default'].normalize(chessinstances[instanceName][node_env].root)) {
    throw "instanceName and instanceType specified doesn't match whats already present do you want to continue " + chessinstances[instanceName][node_env].root + ' does not match ' + selected_overrides.root
  }
  // Override sequence.
  // __default, chessinstances[current_run], instanceName-config-development, cliargs, interactve_promts
  selectedinstance = bbhverse.assign(
      chessinstances[instanceName][node_env]
    , clioverrides
    , selected_overrides
    // , __interactive_prompts -- Cant just override. Also need selectedinstance to be ready...
  );

  // chessinstances[instanceName] = chessinstances[instanceName] || {}
  // chessinstances[instanceName][node_env] = chessinstances[instanceName][node_env] || {}
  
  // if(!selectedinstance.repos || selectedinstance.instanceName) {
  //   // Brand New.
  //   selectedinstance = Object.assign( __default, selectedinstance )
  // }
  
  if(!selectedinstance.repos[0].repo) {
    console.warn('repo manifest has obsolete format. Attempting upgrade.');
    selectedinstance.repos = selectedinstance.repos.map(function(repo){ return { repo } });
  }
  if(selectedinstance.elevated[0] && !selectedinstance.elevated[0].repo) {
    console.warn('elevated repo manifest has obsolete format. Attempting upgrade.');
    selectedinstance.elevated = selectedinstance.elevated.map(function(repo){ return { repo } });
  }
  
  // Config from server always override merges into selection except for the current selection.
  // PB : TODO -- utils.assign Array merges are non-distinct...
  chessinstances[instanceName][node_env] = selectedinstance;
  // chessinstances[selectedinstance.instanceName][selectedinstance.node_env] = selectedinstance;
  cacheWriteInstanceConfig(chessinstances);
  // PB : TODO -- We should probably write the new server config also...
  selectedinstance.reposerver = selectedinstance.reposerver || selectedinstance.reposervers[0]; // PB : TODO -- Attempt first one that is available and online...

  return chessinstances
}

var skipprereqs = {};
var maintask = () => {
  
  // Default cmd to run !
  processedArgs._[0] === processedArgs._[0] || 'pull';  
  // selectedinstance.reposerver = selectedinstance.reposervers[0] // PB : TODO -- Attempt first one that is available and online from all that are available.

  if(!noprerequisites[processedArgs._[0]]
      && !skipprereqs[processedArgs._[0]]
    ) {
    return prerequisites.git.verifyAndInstall().then(()=>{
      var inittasks = [];
      if(!detection_state.localInstanceDetected) {
        var specifictask = ()=>{ return createInstance(selectedinstance) };
        var commantask = () => { preworkerconfig(); return elxrworker() };
        if(!__isElevated) ;
        else {
          specifictask = ()=>{ Promise.resolve(true); };
        }
        inittasks.push(specifictask().then( commantask ));
      }
      else {
        var specifictask = ()=>{ return acquireConfig(selectedinstance) };
        var commantask = () => { preworkerconfig(); return elxrworker() };
        if(!__isElevated) ;
        else {
          specifictask = ()=>{ return Promise.resolve(true) };
        }
        
        inittasks.push(  specifictask().catch((err) => {
          console.error('Chosen cofiguraton failed or not found. Fix config and rerun or chose another.');
          console.error(err);
        }).then( commantask )
        // .finally(()=>{
        //   fs.writeFileSync('run.log', ', ' + JSON.stringify({ error: e.message }), { 'flag': 'a+' })
        //   if(!e.success) fs.writeFileSync('run.done', 'error');
        //   // return process.exit()
        // }))
        );
      }
      
      return any(inittasks) 
    })
  }
  else {
    console.log('cmd has no preqs or has been configured to skip preqs');
    preworkerconfig();
    return elxrworker()
  }

};

var startElxr = function() {
  const retaincount = 2;
  var min = runtimestamp;
  var collect = [];

  if(reconfirmcmds[processedArgs.label || processedArgs._[0]]) {
    reconfirm = getReconfirmAll();
  }

  return detectLocalInstances().then((detectedinstanceoptions)=>{
    
    detectedinstanceoptions.splice(0,0, __default);
    
    var cmdinstance = cmds[clioverrides.cmd];
    var cmdprompts =  cmdinstance.getPossiblePrompts();
    // PB : TODO -- Most recent should be at the tip ! at index 0 so utils.reverseassign is required !!!
    selectedinstance = bbhverse.assign( ...detectedinstanceoptions.slice(-2), promptkeys );
    // promptkeys = utils.assign(promptkeys, clioverrides)

    if(cmdprompts.instanceName) {
      // not an instanceless cmd.
      console.dir(selectedinstance);
      try {
  
        chessinstances = acquirelocalinstances(selectedinstance);
        findlocalinstances(chessinstances, detectedinstanceoptions);
        initinstances(selectedinstance); // use the local instances for defaults if at all possible.        
        var todo = any( getInteractionPoints(detectedinstanceoptions, promptkeys)  ).then(()=>{ 
          var inst = initinstances(selectedinstance);
          detection_state.localInstanceDetected = true;
          return inst;
        });
      }
      catch (e) {
        // PB : TODO -- verbose mode warning.. console.warn(e) // Missing chessinstances is not an error...      
        var todo = any( getInteractionPoints(detectedinstanceoptions, promptkeys)  ).then(()=>{ 
          return initinstances(selectedinstance)
        });
  
        // if(!processedArgs._[0] || !selectedinstance.node_env || !selectedinstance.instanceName){
        //   // Weve not been told what to do.
        //   todo = todo.then(() => { return acquireChoices(selectedinstance) })
        // }
    
        todo = todo.then(() => {
          try {
            chessinstances = acquirelocalinstances(selectedinstance);
            findlocalinstances(chessinstances, detectedinstanceoptions);
            detectedinstanceoptions.splice(0,0, __default);
            initinstances(selectedinstance);
            detection_state.localInstanceDetected = true;
          }
          catch (e) {
            // console.error(e)
            console.log('No local instances config found in current root = ' + selectedinstance.root);
            console.log('A config will be createed with the instance and environment chosen...');
            // return (async ()=>{return await __default.reposerver})().then(()=>{
            //   // selectedinstance = Object.assign(detectedInstance, clioverrides);
            //   return selectedinstance = Object.assign(__default, selectedinstance);
            // })
            detection_state.localInstanceDetected = false;
            return selectedinstance
          }
        });
      }
      return todo
    }
    else return Promise.resolve(true)
  })
  .then(()=>{

    if(noprerequisites[processedArgs._[0]]
      || skipprereqs[processedArgs._[0]]
    ) {
      return elxrworker()
    }

    if(!__isElevated) {
      ensureDirectoryExistence(`${selectedinstance.root}/.elxr/${__ALIAS__STAMP__}`);
      // collect garbage
      return dirs( (dir)=>{
        var matches = /run-(.*)/gm.exec(dir.name);
        if(matches) {
          if(+(matches[1]) < min) {
            min = matches[1];
            collect.splice( 0, 0, matches[1] ); 
          }
          else collect.push(matches[1]);
        }
  
      }, `${selectedinstance.root}/.elxr` ).then(()=>{
        // delete garbage
        if(collect.length > retaincount) {
  
          var asyncs = [];
          while((collect.length - asyncs.length) > retaincount) {
            asyncs.push(getShellTask('rm',['-rf', `run-${collect[asyncs.length]}`], { cwd : `${selectedinstance.root}/.elxr` })());
          }
          return Promise.all(asyncs)
        }
        else return true
      })
    }
    else return true;
  })
  .then(()=>{
    // PB : TODO -- Keep only the last n runs...
    // Currently it retains 2*n when proc needs to be relaunched in elevated mode !!!
    ensureDirectoryExistence(`${selectedinstance.root}/.elxr/run-${runtimestamp}/download.bat`);
    
    if (!__isElevated || processedArgs.forceprereqs && !__isElevated ) mainTasks.push(verifyAndInstallPrerequisites);
    mainTasks.push(maintask);
    return any(mainTasks);
  })
};

acquireElevationState().then(() => {
  

  return startElxr()
});




// Sample instances config.
// var instances = {
//   "elixir": {
//     "production": {
//       "reposervers": ["http://git.bbh", "https://git.bbh.org.in"]
//       , "repos": ["ember-masonry-grid", "client", "elixir-client"]
//       , "exludeMergeRepos": {
//         "elixir-config-development": true, "elixir-config-test": true
//         , "elixir-config-production": true, "elixir-data": true
//       }
//       , "instanceName": "elixir", "node_env": "production"
//     }
//   }, 
//   "current_run": { "instanceName": "elixir", "node_env": "production" }
// }

// ,([^\}^\S\r]*?\}) // Regexp to eliminate extra comma at the end of an array or an object...

var elxr_1 = {

};

module.exports = elxr_1;