elxr/index.js


// {{!-- https://corporatefinanceinstitute.com/resources/knowledge/accounting/general-ledger-gl/ --}}

"use strict";
// console.log([ 'If this is colorized we have color output...' ])
// console.dir(process.env)
var __g = require('global-this');
var ENV = Object.assign({}, process.env); // Shallow clone so we can set values and reuse for reshelling spawns.
__g.env = ENV
ENV.NODE_ENV = (ENV.NODE_ENV && ENV.NODE_ENV.trim())  || 'development'
const fs = require('fs')
var path = require('path');
var utils = require('bbhverse');
var any = utils.any;
var Tasq = utils.Tasq
var statuslog = utils.Traq
var Traq = utils.Traq
// console.error('EEEEEEEEEEEEEEEEEEEE')
var util = require('util')

var ENV = Object.assign({}, process.env); // Shallow clone so we can set values and reuse for reshelling spawns.
const cliargs = utils.cliargs;
const processedArgs = cliargs(process.argv.slice(2));

const __ALIAS__STAMP__ = '9e7bebe0-1f57-11ec-8f88-778ffeea9d1b'
const BUILD_VERSION = '[VI]Version: {version} - built on {date}[/VI]';
const runtimestamp = processedArgs.runtimestamp ? (new Date(processedArgs.runtimestamp)).getTime() : (new Date()).getTime();
function getVersion() { return BUILD_VERSION; }

// '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.

const https = require('https')
const http = require('http');
const { Console } = require('console');
const { env } = require('process');
const PATTERNAPI = require('serververse').PATTERNAPI
// const RESTAPI = require('serververse').RESTAPI
const RESTAPI = (function(){

  // Singleton
  function RESTAPI(){}
  // RESTAPI.create = RESTAPI; // Returns the one singe instance which is the class itself
  // const httpsoptions = {
  //   hostname: 'whatever.com',
  //   port: 443,
  //   path: '/todos',
  //   method: 'POST',
  //   headers: {
  //     'Content-Type': 'application/json',
  //     'Content-Length': data.length
  //   }
  // }
  
  RESTAPI.method = function(options, resolve, reject){
    options.headers = options.headers || { 'Content-Type': 'application/json' }
    
    const data = options.payload ?  new TextEncoder().encode( JSON.stringify(options.payload) ) : null
    options.headers = options.payload ? (options.headers || {
      'Content-Type': 'application/json',
      'Content-Length': data.length
    }) : (options.headers || {})
    !options.headers.Authorization && usertokens[options.username] ? (()=>{
      options.headers.Authorization = `token ${usertokens[options.username]}`
      delete options.username
      onauthenticated()
    })() : (()=>{
      if(!usertokens[options.username] && !options.isAuthCall) {
        RESTAPI.authenticate( utils.assign( {isAuthCall : true}, options ) , onauthenticated, function(err){ 
          // PB : TODO -- Retry without auth...
          console.error('Auth failed or not accessible') 
          reject(err)
        })
      }
      else onauthenticated()
    })()

    function onauthenticated(){
  
      var acquirer = getHTTPorS(options)    
      const req = acquirer.request(options, res => {
        if (res.statusCode < 200 || res.statusCode >= 300) {
          // new Error('statusCode=' + res.statusCode)
          return reject('statusCode = ' + res.statusCode);
        }
        var body = [];
        // res.setEncoding('utf8');
        res.on('data', (chunk)=>{ body.push(chunk); });
        res.on('end', ()=>{
            try {
              if(res.headers['content-type'] && res.headers['content-type'].split(';').find( (i)=> i.trim() === 'application/json' )) body = JSON.parse(Buffer.concat(body).toString());
              else body = Buffer.concat(body).toString();
            } catch(e) { return reject(e); }
            resolve(body);
        });
      });
      
      req.on('error', error => { reject(error) })
      if(options.payload) req.write(data)
      req.end()
    }
  }

  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`

      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.put = RESTAPI.get = RESTAPI.post = RESTAPI.method

  return RESTAPI
})();

var getHTTPorS = function(options){ return options.protocol.startsWith('https') ? https : http; }

const GITEA = (function(){

  function GITEA(){}
  GITEA.APIROOT = '/api/v1'
  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 = `${GITEA.APIROOT}/repos/${cmdoptions.owner}/${cmdoptions.repo}/forks`
      httpoptions.method = 'POST'
      httpoptions.payload = giteaoptions;
      return RESTAPI.post(httpoptions, resolve || function(){}, reject || function(){} )
    }
    , updateattributes( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      httpoptions.path = `${GITEA.APIROOT}/repos/${cmdoptions.owner}/${cmdoptions.repo}`
      httpoptions.method = 'PATCH'
      httpoptions.payload = giteaoptions;
      return RESTAPI.post(httpoptions, resolve || function(){}, reject || function(){} )
    }
    , exists( httpoptions, repo, owner ) {
      // ​/users​/{username} // Get a user
      httpoptions.path = `${GITEA.APIROOT}/repos/${owner}/${repo}`
      httpoptions.method = 'GET'
      return new Promise( (resolve, reject) => {
        RESTAPI.get(httpoptions, function(o){ 
          if(o.id) return resolve(true) 
          return resolve(false) }, reject || function(){ return false } )
      })
    }
    , addcollaborator( httpoptions, repodef, owner, collaborator, permission ) {
      permission = permission || 'Read'
      httpoptions.payload = { permission }
      httpoptions.path = `${GITEA.APIROOT}/repos/${owner}/${repodef.repo}/collaborators/${collaborator}`
      httpoptions.method = 'PUT'
      return new Promise( (resolve, reject) => {
        RESTAPI.put(httpoptions, function(o){
          //  
          if(o === "") return resolve(true) 
          return resolve(false) }, reject || function(){ return false } )
      })
    }
  }

  GITEA.user = {
    getuser( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      // ​/users​/{username} // Get a user
      httpoptions.path = `${GITEA.APIROOT}/users/${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 httpoptions = new URL(selectedinstance.reposerver);
      httpoptions.username = selectedinstance.username
      httpoptions.password = selectedinstance.password

      return GITEA.user.getuser(httpoptions).then(()=>{
        return nodeShellExec('git', ['config', '--replace-all', 'user.name', username],
          {
            inherit: true, shell: true,
            env: 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
})();



// PB : NOTE -- iife doesnt work if previous statement is not terminated by ;
(function () {
  "use strict";
  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)
    }
  }
}());

function isWin(){ return /^win/.test(process.platform) }
if(isWin()) {
  var win_verse = require('./win_verse')
  var shell_verse = win_verse;
  shell_verse.getVersion = getVersion
}
else {
  var lin_verse = require('./lin_verse')
  var shell_verse = lin_verse;
}

// PB : TODO -- In windows if we are run from an elevated shell we never move forward and simply exits !?.
  // -- Currently workaround in windows is to always run from a non-elevated shell.
shell_verse.acquireElevationState().then((isElevated) => {

  // PB : TODO -- Implement queues using streams. Specially form bundling all elevated tasks as a single out of proc run with post elevated queue run postponed until the elevated stream and its dependencies are completed....  
  const { existsSync } = require('fs');
  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;

  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 also a git repository
      // , '/elxr/.elxr' // and has .elxr subfolder we now store this in the instanceroot.
      , '/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 uselauncdirasdefaultroot = false; 
  if( ENV.NODE_ENV === 'production') uselauncdirasdefaultroot = true; 
  // PB : TODO -- enable for for production.
  var thisscriptdir = path.normalize(__dirname); // PB : TODO -- Thisscriptdir could be dislocated when run as a standalone file... We need to detect this where and how 
  var root = undefined // process.cwd() // Root need not be the launchdir...
  // we typicall assume the cwd to be the root. However this should default to 
    // elxr parent if the root is not recongnizable as an instance root....
  // wd is our own environment variable probably corresponding to the root but need not be the same.
  // console.log(processedArgs.root)
  
  // console.log('PWD :' + ENV.PWD)
  // console.log('cwd : ' + process.cwd())
  // console.log('launchscriptdir : ' + path.normalize(__dirname))
  console.log('----------------------------------------------------------------')
  console.log('BEFORE DISCOVERY')
  console.log('version : ' + getVersion());
  console.log('process.env.wd : ' + process.env.wd)
  console.log('processedArgs.root : ' + processedArgs.root)
  console.log('----------------------------------------------------------------')
  console.log('wd :' + ENV.wd)
  console.log('PWD :' + ENV.PWD)
  console.log('cwd : ' + process.cwd())
  console.log(`thisscriptdir = ${thisscriptdir}`)
  console.log(`root = ${root}`)
  console.log(`instanceroot = ${instanceroot}`)
  console.log('----------------------------------------------------------------')
  
  if(!processedArgs.root){ // There is no runtime invoke time named args override.
    console.log('discovery')
    // Script may exists in the same location where we were launched(PWD) but that doesn't mean we r running from elxr.
    // script could have been copied tosome random location and run from there. 
    // check elxr is preinstalled in same location. If so we need to chdir to parent. Else promt for confirmation of root.
    var launchdir = /*process.env.PWD ||*/ process.cwd()  // mingw + node --inspect-brk behaves differently has a PWD that windows commands cannot recognize /d instead of D:\ and process.chdir fails..
    var parentdir = path.dirname( launchdir )
    var parentFolderHasElxr = hasElxrSync(parentdir)
    var launchFolderHasElxr = hasElxrSync(launchdir)
    if( path.normalize(launchdir + '/elxr') === thisscriptdir ) {
      // launchFolderHasElxr is false -- and yet thiscriptdir is still proper.
      if(!launchFolderHasElxr) {
        console.warn('Warning : detected thisscriptdir as subfolder but did not recognize launchdir as a proper root. elxr may not autoupdate...')
        // hasElxr checks for git repo status and elxr id stamping etc.
        //  exlr tool may have been acquired unconventionally and we may not be able to manage it.
        // We will run anyway though
      }
      root = ENV.wd = launchdir;
    }
    else if( path.normalize(parentdir + '/elxr') === thisscriptdir ) {
      if(!parentFolderHasElxr) {
        console.warn('Warning : detected thisscriptdir as subfolder but did not recognize parentdir as a proper root. elxr may not autoupdate...')
      }
      // PB : TODO -- Cleanup this should no longer be needed... selectedinstance is properly initialized...        
      root = ENV.wd = parentdir; // Default to the parent.
    }
    else {
      if (launchdir === thisscriptdir) {
        // Same directory doesn't mean we are being run from elxr sub directory. It could be a dislocated standalone elxr script. 
        // PB : TODO -- In case elxr is not full elxr we need to locate it and relaunch to switch to the full version...
            
        // if(!parentFolderHasElxr) console.error('Invalid run location in subfolder that looks like elxr. We should probably abort.')
        if (BUILD_VERSION.indexOf('Version: {version} - built on {date}') > -1) {
          // Confirmed we were run from an Unbuilt ( meaning non standalone ) elxr therefore we are in the elxr sub directory.
          root = ENV.wd = parentdir; // Default to the parent.

          // instanceroot = root = path.normalize(selectedinstance.root + '/..');
          // instanceoptions.splice( 0, 0, detected = { root });
          // instanceoptions.splice( 0, 0, detectfromroot(root));
        }
        else if(!parentFolderHasElxr) {

            // Either case we use the launchdir.
            // if(launchFolderHasElxr) {
            //   // Probably a standalone run. Lets just go with it
            //   root = ENV.wd = launchdir;
            // }

            // In standalone build script we may or not be in the same location.
            // We could have been run from the elxr subfolder. However we cant say for sure.
            // Most likely that the built version isn't the full elxr. We assume elxr doesnt exist and create an new elxr under..
            console.error('Warning : detected thisscriptdir as elxr subfolder but not recognized as elixir. git updates might fail.')
            root = ENV.wd = launchdir;
          }
          else {
            // Built version was run from the full elxr subfolder 
            root = ENV.wd = parentdir; // Default to the parent.
            // instanceoptions.splice( 0, 0, detected = { root })
            // instanceoptions.splice( 0, 0, detectfromroot(root))
            
            // Assume current selectedinstance.root 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(selectedinstance.root + '/' + 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(selectedinstance.root + '/' + 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 = selectedinstance.root;
            //   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(launchFolderHasElxr) {
        root = ENV.wd = launchdir;  
        // instanceoptions.splice( 0, 0, detected = { root })
        // instanceoptions.splice( 0, 0, detectfromroot(root))
      }
      else {
        // Ambiguous but assume script is standalone in the instanceroot
        // Lets defualt to the script parent assuming there is an instanceroot there. Hoever this should probably be a prompt where possible.
        // when we r in that mode.
        if(uselauncdirasdefaultroot) {
          // must be a new install in the selectedinstance.root with script invoked from some random location.
          if(!process.env.wd){ 
            // Working directory as a .env variable was not passed in.
            root = ENV.wd = launchdir;
          }
          else root = ENV.wd = process.env.wd
        }  
        else {
          var scriptparent = path.dirname( thisscriptdir )
          root = ENV.wd = scriptparent;
        }
      }
    }
  }
  else {
    if(process.env.wd && process.env.wd !== processedArgs.root) throw 'wd and root must match.'
    root = ENV.wd = process.env.wd = processedArgs.root
  }
  var instanceroot = root
  ENV.PWD = ENV.wd
  ENV.NODE_ENV =  processedArgs.node_env || (ENV.NODE_ENV && ENV.NODE_ENV.trim())  || 'development'
  
  console.log('----------------------------------------------------------------')
  console.log('AFTER DISCOVERY')
  console.log('version : ' + getVersion());
  console.log('process.env.wd : ' + process.env.wd)
  console.log('processedArgs.root : ' + processedArgs.root)
  console.log('----------------------------------------------------------------')
  console.log('wd :' + ENV.wd)
  process.chdir(ENV.wd) // Ensure cwd is the actual working dir.
  console.log('PWD :' + ENV.PWD)
  console.log('cwd : ' + process.cwd())
  console.log(`thisscriptdir = ${thisscriptdir}`)
  console.log(`root = ${root}`)
  console.log(`instanceroot = ${instanceroot}`)
  console.log('----------------------------------------------------------------')
  
  var cli = require('./cliverse')

  // throw 'initbreak'

    // We no longer use this Folder name may be different from instanceName
    // var detectfromroot = function(root){
    //   return { root, node_env : path.basename(root), instanceName : path.basename( path.dirname(root) ) }
    // }

  // independent 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 __default = {
    // Common baseline repos for all chess chessinstances.
    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 : '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' }
    ]
    // Requires elevation only in windows
    , elevated : [ { repo : 'chess-server-lib', requiresElevation : true  } ]
    , exludeMergeRepos : { }
  }; // PB : TODO -- Use initialized instance instead of __default everywhere.

  var regexreplaceall = function(content, ps){
    var repmatches
    var replaced = content;
    while (repmatches = ps.strOrregexp.exec(content)) {

      if(content.length > 0) {
        var replacement = repmatches[0]
        for(var m = 1; m < repmatches.length; m++) {
          replacement = replacement.replace(repmatches[m], ps.substitutes[m-1])
        }
        replaced = replaced.replace( repmatches[0], replacement )
      }
    }
    return replaced
  }

  var cmds = {
      sqlpreprocess : {
        noprerequisites : true
        , cmdFn : function(args){
          
          // PB : TODO -- Load loopback app !!! for db connection to execute intermediate results for query genereation !!!

          return PATTERNAPI.includesql('', args._[1]).then(sqlquery => {
            // Do what we need to with the output
            // fs.writeFileSync(args._[1].replace('.sql', '.temp.g.sql'), sqlquery, { encoding: 'utf8'})  // For intermediate processing 
            fs.writeFileSync(args._[1].replace('.i', ''), sqlquery + "\n" , { encoding: 'utf8'}) // Dynamic query output.
            // Static query debug output cannot be produced here... As EXEC sp_executesql must run to get the output. This can be produced by sqlfragmentexec in sql command mode.
            return sqlquery
          })


          // // PB : TODO -- move to dsql preprocesor
          // // var sqlquery  = 'SET @dsql = @dsql + ' + "'" + ('' + fs.readFileSync(args._[1])).replace(/\'/g,"''") + "'"
          // var sqlquery = fs.readFileSync(args._[1], { encoding: 'utf8'})
          // var regExp = /\-\-\s{{INCLUDE(.*?) ([\s\S]*?)}}\s\-\-/gm;

          // var options = {}
          // sqlquery = replacepatterns(sqlquery, regExp, (matches, sqlquery)=>{
          //   if (matches[1] === 'ASDSQL') options.dsql = true
          //   var replacement = { 
          //       distinctpatterntoreplace : new RegExp("\\-\\-\\s{{INCLUDE\\s" + matches[2] + "}}\\s\\-\\-","gm") 
          //     , detectedvaluepattern : matches[2]
          //       // escaped dsql... //'SET @dsql = @dsql + ' + "'" + ('' + fs.readFileSync(args._[1])).replace(/\'/g,"''") + "'"
          //   }

          //   if(options.dsql) replacement.substituedvalue = ('SET @dsql = @dsql + ' + "'" + ('' + fs.readFileSync(path.dirname(args._[1]) + '/' + matches[2])).replace(/\'/g,"''") + "'")
          //   else replacement.substituedvalue =  fs.readFileSync(path.dirname(args._[1]) + '/' + matches[2])
            
          //   sqlquery = sqlquery.replace(replacement.distinctpatterntoreplace, replacement.substituedvalue);   
          //   regExp.lastIndex = 0;
          // })

          // // console.log(replaced)
          // fs.writeFileSync(args._[1] + '.d.sql', sqlquery, { encoding: 'utf8'})
        }
        , toArgs : function( o ){  return o }
        , interpret() { return { cmd : processedArgs._.slice(0, 1) }  }
      }
    ,  remote : {
        interpret() { return utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
          , { cmd : processedArgs._.slice(0, 2).join(' '), runchoice : 'c' })  }
      , noprerequisites : true
      , independentcmd : true 
    }
    , start : {
      interpret() { return utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
          , { cmd : 'start', runchoice : 'c'
              , node_env : ENV.NODE_ENV, root : ENV.wd, instanceType : ENV.NODE_ENV
            })}
      , toArgs : function( o ){ 
        return o
      }
    }
    , 'remote refresh' : {
      // return a interpreted set of arguments for this cmd run context.
      interpret() { return utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
        , { cmd : 'remote refresh', runchoice : 'c' })  }
      , noprerequisites : true
      , independentcmd : true
      // , requires : [ generateDependencies ]
      , toArgs : function( o ){ 
        return o
      }
    }
    , 'remote set-url' : {
      // return a interpreted set of arguments for this cmd run context.
      interpret() { return utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
        , { cmd : 'remote set-url', runchoice : 'c' })  }
      , noprerequisites : true
      , independentcmd : true
      // , requires : [ generateDependencies ]
    }
    , 'remote add' : {
      // return a interpreted set of arguments for this cmd run context.
      interpret() { return utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
        , { cmd : 'remote add', runchoice : 'c' })  }
      , noprerequisites : true
      , independentcmd : true
      // , requires : [ generateDependencies ]
    }
    , 'remote remove' : {
      // return a interpreted set of arguments for this cmd run context.
      interpret() { return utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
        , { cmd : 'remote remove', runchoice : 'c' })  }
      , noprerequisites : true
      , independentcmd : true
    }
    , 'addcollaborator' : {
      // Usage : 
      // elxr addcollaborator instancename developer
        cmdFn : function(args){

          var __each = function(args){
            var collaborator = args.collaborator;
            if(!collaborator) {console.error('Error : collaborator required'); throw 'Error : collaborator required' } 
            var repo = args.repo
            var remotename = 'chess' 
            var repodef = selectedinstance.reposindexed[repo];
            if(!repodef) return
  
            var remotenames = (selectedinstance.selectedremotes || []).concat( selectedinstance.permanentremotes )
            var remotes = selectedinstance.reposerverinstances[selectedinstance.reposerver].remotes
            // console.log('-----------------------------------------------------')
            // console.log(repo)
            // // console.dir(remotes)
            // console.log('-----------------------------------------------------')

            // PB : TODO -- pick up remote definitions per repository...
            var reposmanfiest = utils.assign_core( { keycase : true, arraymergetype : utils.assign_core.DISTINCT_UNION }
              , {}, selectedinstance, loadmanifest( selectedinstance.root + '/' + repo
              , { username : selectedinstance.username, instanceName : selectedinstance.instanceName
              , node_env : selectedinstance.node_env, reposerver : selectedinstance.reposerver }
            )) 
    
            if( !reposmanfiest.error ) {
              var reporemotenames = remotenames.concat(reposmanfiest.selectedremotes || []).concat( reposmanfiest.permanentremotes || [] )
              var reporemotes = utils.assign(remotes, reposmanfiest.reposerverinstances[selectedinstance.reposerver].remotes)
            }
            else {
              var reporemotenames = remotenames
              var reporemotes = remotes
            }          
            
            var remote = reporemotes[remotename]
            var reposerver = repodef.server || remote.server || selectedinstance.reposerver 
            
            // selectedinstance.reposerverinstances[reposerver]
            var auth = repodef.username ? repodef : remote.username ? remote : selectedinstance.reposerverinstances[reposerver].username ? reposerver : selectedinstance;
            var httpoptions = new URL(reposerver);
            httpoptions = {
                hostname: httpoptions.hostname
              , protocol : httpoptions.protocol
            }
            httpoptions.username = auth.username  // PB : TODO -- Handle remotes with different username. Also cache git credentials either globally or per repo...
            // PB : TODO -- handle credentials properly. cant mix and match passwords..
            httpoptions.password = (auth.password || selectedinstance.password || '') // PB : NOTE URL has some kind of a setter for password which converts to string "undefined" as password which is undesirable.. so we pre resolve and send.
            // console.log(___args)
            // PB : TODO -- Check valid collaborator before adding... 
            return GITEA.repository.addcollaborator(httpoptions, repodef, remote.owner, collaborator).then( v => {
              if(v === true) {
                console.log('-----------------------------------------------------')
                console.log('addcollaborator successful for ' + repo + ' ' + collaborator)
                console.log('-----------------------------------------------------')    
              }
            } )
          }

          var promises = []
          var repos = Object.keys(selectedinstance.reposindexed)
          repos.forEach(repo => { promises.push(__each({ repo, collaborator :  args._[2]}))  }) // PB : TODO -- Move to toArgs.
          return Promise.all(promises).then(pr => { console.log('addcollaborator done') }) 
        }
    }
    , 'isurlaccessible' : {
        noprerequisites : true
      , independentcmd : true
      , toArgs : function( o ){ 
        return { url : o._[1] }
      }
    } 
    , resetgitconfig : {
      // return a interpreted set of arguments for this comd run context.
        // cmdFn : resetgitconfig, 
      interpret() { return { cmd : 'resetgitconfig' } }
      , noprerequisites : true
      , independentcmd : true
    }
    , reinit : {
      // return a interpreted set of arguments for this comd run context.
      //   cmdFn : reinit
      // , 
      interpret() { return { cmd : 'reinit' } }
      , noprerequisites : true
      , independentcmd : true
      , requiresElevation : true
      // , requires : [ generateDependencies ]
    }
    , init : {
      // return a interpreted set of arguments for this comd run context.
      //   cmdFn : init
      // , 
      interpret() { return { cmd : 'init' } }
      , noprerequisites : true
      , independentcmd : true
      , requiresElevation : true
      // , requires : [ generateDependencies ]
    }
    , 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
    }
    , 'get-upstream' :{
      //   cmdFn : op['get-upstream'] // default
      // , 
      cmd : 'get-upstream'
      , noprerequisites : true
      , independentcmd : true
      , interpret() { return { cmd : 'get-upstream' } }
    }
    , 'g' : {
        cmd : 'g'
      , noprerequisites : true
    }
    , 'link' : {
        'cmd' : 'link'
        // , cmdFn : function( sourecpath, filename, dir ){
        //   var afterTargetPath = (dir)=>{
        //     console.dir(dir);

        //     // var tasks = [
        //     //   () => {
        //     //     // Use junctions to avoid npm package issues
        //     //     var p = nodeShellExec('mklink', ['/J', filename, sourecpath], {
        //     //       inherit: true, shell: true
        //     //       , cwd : dir || instanceroot
        //     //       , env: ENV
        //     //     }).catch((e) => { console.error(e) })
        //     //     return p;
        //     //   }
        //     // ];

        //   }
          
        //   // console.dir(ENV)
        //   if(!dir) getCurrentFolder().then(afterTargetPath);
        //   else afterTargetPath(dir)

        // }
        , cmdFn : function( cmdopts ){
          // sourecpathandfile should include name of file name
          targetfilename = cmdopts.targetfilename || processedArgs._[1]
          // console.log(processedArgs)
          if(!targetfilename) return Promise.reject('error no file provided for linking')
          targetdir = cmdopts.targetdir || ENV.wd
          sourecpathandfile = cmdopts.sourecpathandfile || path.normalize(`../../node_modules/chess-server-lib/common/models/${targetfilename}`)

          var tasks = [
            () => {
              // Use junctions to avoid npm package issues
              var p = nodeShellExec('mklink', [path.normalize(`${targetdir + '/' + targetfilename}`), sourecpathandfile], {
                inherit: true, shell: true
                , cwd : targetdir
                , env: ENV
              }).catch((e) => { console.error(e) })
              return p;
            }
          ];
          var etask = ()=>{ 
            return any(tasks).then(() => {
              fs.writeFileSync('run.done', 'success')
            }).catch(() => {
              fs.writeFileSync('run.done', 'error')
            })
          }
          etask.statuslog = statuslog
          etask.selectedinstance = selectedinstance
          etask.processedArgs = processedArgs
          etask.runtimestamp = runtimestamp
          etask.ENV = ENV
          return shell_verse.runElevated(etask)
        }
        , noprerequisites : true
        , privileged : true
    }
  }

  function interpret() { 
    var interpreted = this
    // Non custom command has universal positiona args.
    processedArgs._[1] ? interpreted.instanceName = processedArgs._[1] : null;
    interpreted.runchoice = interpreted.cmd ? 'c' : null  
    // interpreted.runchoice = processedArgs._[0] || selectedinstance.runchoice;
    // 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 } }
    // }
    // ... PB : TODO -- use  cmd.toArgs
    // interpreted.cmd = this.cmd 
    return interpreted 
  }

  var interpretrun = function(){
    var cmd = processedArgs._[0];
    return cmds[cmd] && cmds[cmd].interpret ? cmds[cmd].interpret() : (function(){  
      return cmds[cmd] = utils.assign(cmds[cmd] || {}, interpret.call({ cmd, toArgs : function( o ){ 
        // PB : TODO -- need to call this before selectedinstance is built. The instanceName is dependent on the specific cmd.
        return o } }))
    })() 
  }

  var chessinstances = { current_run : {} };
  var clioverrides = interpretrun()
  clioverrides = utils.assign( { cmd : processedArgs._[0], node_env : ENV.NODE_ENV, root : ENV.wd, instanceType : ENV.NODE_ENV }
    , clioverrides, cmds[clioverrides.cmd].toArgs(processedArgs), { root : ENV.wd } )
  function acquirelocalinstances(selected){
    // utils.assign is used to cleanup duplicates... assuming it is probably not clean.
    // PB : TODO -- if require fails decipher instanceName from findlocalinstances using the root...

    try { var existinglocalinstances = require(path.normalize(selected.root + '/chessinstances.js'))}
    catch(e){
      console.warn( 'Local instances not found.' ) // This is not an error. A new fresh instance is probably being setup.
      var existinglocalinstances = { current_run : {}, error : true }
    }

    chessinstances = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }, existinglocalinstances);
    // console.dir(chessinstances)
    return chessinstances
  }

  function findlocalinstances(chessinstances, instanceoptions){
      // We can expect a .elxr at each level in folder and 2 levels up. higher up we will find a shared instance chessinstances.js
      ['' /* instanceroot */, '../' /* instanceTypes or node_env */, '../../' /* instanceNames */].
        earlyreduce( ( reduced, p, i, a )=>{
          var localinstancesPath = `${instanceroot}/${p}.elxr`;
          if(existsSync( localinstancesPath )) {
            try {
              acquirelocalinstances( { root : `${instanceroot}/${p}` }   )
              if(chessinstances.error) {
                delete chessinstances.error; delete chessinstances.e 
                return {}
              }
              return Object.keys(chessinstances).earlyreduce( ( reduced, instanceName) => {
                  return Object.keys(chessinstances[instanceName]).earlyreduce( (reduced, instanceType) => { 
                        // Scan to find a matching instanceroot
                        if(  path.normalize(chessinstances[instanceName][instanceType].root) === path.normalize( instanceroot) ) {
                          instanceoptions.splice( 0, 0, chessinstances[instanceName][instanceType])
                          return {
                              value : chessinstances[instanceName][instanceType]
                            , done : true
                          };
                        }
                      })
                  })
            }
            catch(e){ 
              return { }
            }
          }
          else return { }
        }
      )
  }
  // PB : TODO -- Move this to utils assign... as an array merge option.
  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(  utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
        , ...keyedDistinct[key] ) ) // PB : TODO -- Shallow use utils.assign
    })

    return distinctArrOfObjs;
  }

  var cacheWriteInstanceConfig = function(chessinstances, instanceroot, selectedinstance){
    if(selectedinstance) {

      var instanceName = selectedinstance.instanceName ;
      var node_env = selectedinstance.node_env;
      // PB : TODO -- handle current_run switch...
      // console.dir(chessinstances)
      // PB : TODO -- We should be able to do simply merge at a higher level using assign
      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 loadmanifest = function( mpath, moverrides ){
    try {
      // PB : TODO -- pick up remote definitions per repository...
      return utils.assign_core( { keycase : true, arraymergetype : utils.assign_core.DISTINCT_UNION }
        , {}, require(path.normalize( mpath + '/repo-manifest'))( {utils}, null, moverrides ))
      
    }
    catch(e){ 
      // console.warn(e); 
      return utils.assign_core( { keycase : true, arraymergetype : utils.assign_core.DISTINCT_UNION }, { error : true, e }, moverrides) 
    }
  }
  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 getPromptableAsyncPropDescriptor = function(propName, promptable){
    return {
      get (){
        return any( promptable.dependencies || [] ).then(()=>{

          return cli.prompt( promptable.choices, promptable.label, promptable.defaultchoice, promptable.selectedchoice ).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
    }
  }

  var getBoundEachPrompt = function(target, possiblePrompts, promptables, choices, promptsfilter) {
    return function(prompts, k, i, a){
      // Reducer for all prompts on targets.
      
      // 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 {{target}} needs to be in the same state as when it was invoked.
          // We need to take a snapshot... Shallow.. !! If required deep should be used based on use case. 
          // var asyncthis = Object.assign(this); 
          // By default Latest altered state is provided which is an implicit reference directly.
          console.log('----------------------------------------------------')
          console.log(k)
          console.dir(choices[k])
          if(!promptables[k]) promptables[k] = {} 
          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
    }
  }

  // unbound. Bind before using.
  var unbound_interactionpoints = function(selectedinstance){
    var self = this;
    var _interactionpoints = {
          get runchoice()  { 
            return {
              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'
              , selectedchoice : self.target.runchoice
              , interpret : function(choice){
                var interpret_map = {
                  d : function(){
                    processedArgs._[0] = 'i'
                    self.target.instanceName = processedArgs._[1] = processedArgs._[1] || 'chess'
                    self.target.node_env = processedArgs.node_env = (ENV.NODE_ENV && ENV.NODE_ENV.trim()) || processedArgs.node_env || 'development'
                    self.target.reposerver = 'https://git.bbh.org.in'  // PB : TODO -- Read from global defaults...
                  }
                  , n : function() { processedArgs._[0] = 'i' }
                  , i : function() { 
                    processedArgs._[0] = 'i'
                    // processedArgs._[1] = self.target.instanceName || processedArgs._[1] || 'chess';
                  }   
                  , c : async function() {
                    // self here will always be the self.target.
                    Object.defineProperty(self, 'cmd', getPromptableAsyncPropDescriptor('cmd', { 
                      label : `Enter cmd : 
                      p) pull
                        Default <= p
                      : `
                      , defaultchoice : 'pull'
                      }
                    ));
    
                    var cmd = await self.target['cmd'];
                    if (!cmd || cmd === 'p') { self.target['cmd'] = processedArgs._[0] = 'pull' }
                    else self.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() }
                }
    
                if(Promise.resolve(choice) === choice){
                  return choice.then( resolvedchoice => {
                    return (interpret_map[choice] || interpret_map['c']).call(self.target)
                  })
                }
                else return Promise.resolve( (interpret_map[choice] || interpret_map['c']).call(self.target) )
    
                // var __interpreter = interpret_map[choice] || 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(self.target)
              }
            }
          }
        , get instanceName()  { 
          return { label : `Enter Instance Name ( <= ${self.target.instanceName || 'chess'} ) : `
            , choices : self.choices['instanceName'], defaultchoice : 'chess'
            , selectedchoice : self.target.instanceName
          }
        } 
        , get instanceType()  { 
          return { label : `Enter Instance Type ( <= ${self.target.instanceType || 'development'} ) : `
            , choices : self.choices['instanceType'], defaultchoice : 'development'
            , selectedchoice : self.target.instanceType || 'development'
          }
        }
        , get reposerver()  { 
          return { label : `Enter Repo Server Base Url ( <= ${self.target.reposerver || 'https://git.bbh.org.in'} ) : `
            , get choices() { 
              // self.choices['reposerver'].forEach( rs => {
              //   var __rs = new URL(rs); 
              //   __rs.hostname = __rs.host;
              //   __rs.path = '/'
              //   __rs.method = 'GET'
              //   RESTAPI.get(__rs, function(data){ rs.accessibility = 'accessible' }
              //     , function(error){ rs.accessibility = 'unaccessible' } )
              // })
              return self.choices['reposerver']
            }
            , set choices(cs) { 
              return self.choices['reposerver'].concat([selectedinstance.reposerver]).concat(cs)
            } 
              
            , defaultchoice : selectedinstance.reposerver || 'https://git.bbh.org.in'
            , selectedchoice : self.target.reposerver
          }
        } 
        
      //   , 'upstream-remote' : { label : `Enter Remote Name ( <= ${self.target['upstream-remote'] || 'chess'} ) : `
      //     , get choices() {  
      //         var reposerver = self.target['reposerver'] 
      //         var remotes = []
      //         var trs = self.target.reposervers || []  
      //         trs.forEach(rs => {
      //           if(rs.server === reposerver){
      //             remotes.push(remote)
      //             // PB : TODO -- Sort and display highest priority self.target.remotes.sort(   )
      //           }
      //         })
      //         return remotes 
      //       }
      //       , set choices(addlchoices){
      //         var reposerver = self.target['reposerver'] 
      //         var remotes = []
      //         var trs = self.target.reposervers || []  
      //         trs.forEach(rs => {
      //           if(rs.server === reposerver){
      //             remotes.push(remote)
      //             // PB : TODO -- Sort and display highest priority self.target.remotes.sort(   )
      //           }
      //         })
      //         return remotes.concat(addlchoices)
      //       }
      //       , defaultchoice : 'userfork'
      //       , selectedchoice : self.target['upstream-remote'] || 'userfork'
      //     // Just using getters resolves dependencies..., dependencies : [ ()=>{ return self.target['reposerver'] } ]
      //   }
      //   , 'remote-type' : { label : `Enter Remote Type ( <= ${self.target['remote-type'] || 'public'} ) : `
      //   , get choices() {  
      //       return ['external', 'public', 'private', 'github', 'unc']
      //     }
      //     , set choices(addlchoices){
      //       var reposerver = self.target['reposerver'] 
      //       var remotes = []
      //       var trs = self.target.reposervers || []  
      //       trs.forEach(rs => {
      //         if(rs.server === reposerver){
      //           remotes.push(remote)
      //           // PB : TODO -- Sort and display highest priority self.target.remotes.sort(   )
      //         }
      //       })
      //       return ['external', 'public', 'private', 'github', 'unc'].concat(addlchoices)
      //     }
      //     , defaultchoice : 'public'
      //     , selectedchoice : self.target['remote-type'] || 'public'
      //   // Just using getters resolves dependencies..., dependencies : [ ()=>{ return self.target['reposerver'] } ]
      // }
      //   , 'selectedremotes' : { label : `Chose Remote Names ( <= ${self.target['selectedremotes'] || 'chess'} ) : `
      //     , get choices() {  
      //         var reposerver = self.target['reposerver'] // PB : TODO -- We need options to work with multiple selected reposervers at the same time..
      //         var remotenames = [] 
      //         Object.entries(self.target.remotes || []).forEach( ([rname, r]) => {
      //           if(r.server === reposerver && r.accessibility.find( self.target[ 'remote-type' ] )){
      //             remotes.push(rname)
      //             // PB : TODO -- Sort and display highest priority self.target.remotes.sort(   )
      //           }
      //         })
      //         // PB : TODO -- Need to generate all possible permuted choices nP( 1 -> n )
      //         // Currenty handles all combinations without any priority order.
      //         var _remotechoices = [] // Array of arrays of choices.
      //         remotenames.forEach( r => {
      //           var __rcs = []
      //           _remotechoices.forEach(rc => { 
      //             __rcs.push(  rc.concat(r) )
      //           })
      //           Array.prototype.push.apply( _remotechoices, __rcs)
      //           _remotechoices.push(r)
      //         })
  
      //         return _remotechoices 
      //       }
      //       , defaultchoice : ['userfork', 'chess']  // userfork and chess should imlicitly point to userfork-external and chess-external when external connectivity is dtetected. 
      //       , selectedchoice : self.target['selectedremotes'] || ['userfork-external', 'chess-external'] 
      //       // , defaultchoice : { 'userfork-external' : self.target.remotes['userfork-external'] , 'chess-external' : self.target.remotes['chess-external'] }
      //       // , selectedchoice : self.target['selectedremotes'] || { 'userfork-external' : self.target.remotes['userfork-external'] , 'chess-external' : self.target.remotes['chess-external'] }
            
      //       // Info : Just using getters resolves dependencies..., dependencies : [ ()=>{ return self.target['reposerver'] } ]
      //   }
        , get username()  { return { label : `Enter User Id for ${self.target.reposerver} ( <= ${self.target.username || 'chess'} ) : `
            , choices : self.choices['username'], defaultchoice : self.target.username || 'chess', selectedchoice : self.target.username } }
        , get password()  { return { label : `Enter Password for ${self.target.username} @ ${self.target.reposerver} ( <= ${self.target.password || ''} ) : `
            , choices : self.choices['password'], defaultchoice : '***', selectedchoice : self.target.password } }
        , get email()  { return { label : `Enter Email for ${self.target.username} @ ${self.target.reposerver} ( <= ${self.target.email || ''} ) : `
            , choices : self.choices['email'], defaultchoice : 'guest@bbh.org.in', selectedchoice : self.target.email } }
  
      }
    return _interactionpoints
  }
  
  var get_interactionpoints_template = function(){ 
    return {
      instanceName : { label : `Enter Instance Name ( <= ${this.target.instanceName || 'chess'} ) : `
          , choices : this.choices['instanceName'], defaultchoice : 'chess'
          , selectedchoice : this.target.instanceName
        }
    }
  }

  var pending = (function() {
    
    // PB : TODO -- Override cli prefs and call with undefined selectedinstance only if there is no cli overide or selection.
    acquirelocalinstances( { root : ENV.wd } )

    function createLocalChessInstance( cfg ){ 
      // return createInstance(cfg)
      reconfirm = getReconfirmAll()
      var inst = {};
      var __new = Object.assign({}, __default, cfg)
      inst[cfg.node_env] = __new; return inst; 
    }

    if(chessinstances.error) {
      delete chessinstances.error
      // use installchoices only when we don't find chessinstances.
      try { var installchoices = require(path.normalize(ENV.wd + '/installchoices.js'))
        var instanceName = installchoices.instanceName;
        var reposerver = installchoices.reposerver
        var node_env = clioverrides.node_env || installchoices.node_env
        var __instance = (chessinstances[instanceName] = chessinstances[instanceName] || createLocalChessInstance( { 
          instanceName, node_env, root, reposerver  /* promptkeys['reposerver'] */ } ))[node_env];
        chessinstances['current_run'] = { instanceName, node_env, reposerver, root }

        // if(path.normalize(selectedinstance.root) !== path.normalize(chessinstances[selectedinstance.instanceName][selectedinstance.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 ' + selectedinstance.root
        // }
        // chessinstances[installchoices.instanceName] = chessinstances[installchoices.instanceName] || {} 
        // chessinstances[installchoices.instanceName][installchoices.node_env || clioverrides.node_env] = installchoices
        __instance.username = installchoices.username = installchoices.gitUser
        __instance.email = installchoices.email = installchoices.gitEmail
      }
      catch(e){
        console.warn(e)
        console.warn( 'Install choices not found. WIll prompt for choices' ) // This is not an error. A new fresh instance is probably being setup.
        throw 'PROMPT FOR INSTLL CHOICES TO BE IMPLEMENTED'
        // chessinstances[installchoices.instanceName] = chessinstances[installchoices.instanceName] || {} 
        // chessinstances[installchoices.instanceName][installchoices.node_env || clioverrides.node_env] = installchoices
      }
    }
    
    // PB : chessinstances.js update if we are switching repo servers, username etc... Myabe always refresh on each run.
    // root location for instance swithc ?? should not be allowd...
    var instanceName = clioverrides.instanceName || chessinstances.current_run.instanceName
    var instance = {}
    function oninstanceName(instanceName) {

      var instance_ = chessinstances[instanceName]
      if(instance_) {
        instance = instance_[clioverrides.node_env  || chessinstances.current_run.node_env] || utils.assign(chessinstances['current_run'], clioverrides, { instanceName })
      }
      else instance = utils.assign(chessinstances['current_run'], clioverrides, { instanceName })
      // PB : TODO We should promt like instanceName create a new one instad of undefined ?? 
      return instance
    } 
    if(!instanceName) {
      var interactionpoints = (function() { return { instanceName : get_interactionpoints_template.bind({target : {}, choices : {}})()['instanceName'] } })()
      var eachPrompt = getBoundEachPrompt(instance, utils.assign({}, interactionpoints), interactionpoints, {})
      var pendingtasks = any( Object.keys(interactionpoints).reduce(eachPrompt, []) ).then(()=>{
        return oninstanceName(instance.instanceName)
      })
    }
    else {
      var pendingtasks = Promise.resolve(oninstanceName(instanceName))  
    }    
    
    return pendingtasks.then((instance)=>{
      
      // PB : TODO -- Embed defaults in the build instead of inlining here...
      
      // PB : TODO -- All these values instanceName, node_env, username, reposervers should come from instace overridden by a finalized cliovrrides... 
      // Also attepmt to load preconfig specially for new chessinstances from ../chess-config/...
      
      var __repo_manifest_elxr = loadmanifest( instance.root + '/elxr'
        , { username : instance.username /** ??? TODO */ , instanceName : instance.instanceName /** ??? TODO */
        , node_env : clioverrides.node_env, reposerver : instance.reposerver /** ??? TODO */  } // options
      )
      
      if(__repo_manifest_elxr.error) console.log(__repo_manifest_elxr.e.message)
      
      var instance_specific_config_manifest = loadmanifest( instance.root + `/${instance.instanceName}-config-${clioverrides.node_env}`
        , {   username : instance.username /** ??? TODO */ , instanceName : instance.instanceName /** ??? TODO */
        , node_env : clioverrides.node_env, reposerver : instance.reposerver /** ??? TODO */  } // options
      )
      if(instance_specific_config_manifest.error) console.log(instance_specific_config_manifest.e.message)
      delete __repo_manifest_elxr.error
      delete __repo_manifest_elxr.e
      // delete __repo_manifest_elxr.utils
      delete instance_specific_config_manifest.error
      delete instance_specific_config_manifest.e
      // delete instance_specific_config_manifest.utils
  
      // selectedinstance is not complete until we load in the following order of priority...
      // 1) inline defaults
      // 2) elxr defaults & manifest
      // 3) ../chess-config/... defaults  TODO
      // 4) local cached lastrun or cli selected instance from chessinstances
      // 5) instance specific manifest from {{instanceName}}-config-{{node_env}} ( can work with stale or on demand currently pulled updated version )
      // 5.5) runconfig ??? lastrun vs fixed runconfig for repetitive stuff. TODO -- runconfig overrides lastrun...
      // 6) cli overrides from command promnt
      // 7) promted selections and reconfirms.
      var __pvt = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
          , __default, __repo_manifest_elxr, instance
          , { root :  ENV.wd, node_env : ENV.NODE_ENV
            , get instanceName() {
              // FInalize to prevent subsequent overrides...
              return instance.instanceName
            }
          }
          , instance_specific_config_manifest
          , clioverrides
        )
      // console.dir(__pvt)
      // Unmergable server overrides
      Object.keys(instance_specific_config_manifest).forEach( key => {
        __pvt[key] = instance_specific_config_manifest[key]
      }) 
  
      var __pub = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }, {}, __pvt
          // Finalized immutables.
          // We don't need pub to prevent immutability.
          , { get root(){ return __pvt.root }
          , get node_env(){ return __pvt.node_env }
          , get instanceName() { return __pvt.instanceName }
          , get reposindexed(){
            // PB : TODO -- Implement -- One time gettor and then cached...
            var indexed = {}
            this.repos.forEach(r => { indexed[r.repo] = r })
            this.elevated.forEach(r => { indexed[r.repo] = r })
            Object.defineProperty(this, 'reposindexed', { value: indexed, writable: false });
            return indexed;
          }
          , set root(val){ 
            throw 'root changes not yet supported'
            // if the root changes while we r invoked from somewhere else... we need to reload everything from that location... 
            if(__pvt.root === val){
  
              return __pvt.root = val 
            }
            else __pvt.root
          }
        }
      )
      
      chessinstances[__pub.instanceName] = chessinstances[__pub.instanceName] || {}
      chessinstances[__pub.instanceName][__pub.instanceType] = __pub 
      // PB : TODO initinstances is now obselete relocated here
      // Upgrade old formats..
      if(__pub?.repos && !__pub?.repos[0]?.repo) {
        console.warn('repo manifest has obsolete format. Attempting upgrade.')
        __pub.repos = __pub.repos.map(function(repo){ return { repo } })
      }
      if(__pub?.elevated && !__pub?.elevated[0]?.repo) {
        console.warn('elevated repo manifest has obsolete format. Attempting upgrade.')
        __pub.elevated = __pub.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;
  
      // PB : TODO -- We should probably write the new server config also...
      // PB : TODO -- Attempt first one that is available and online...
      // PB : TODO -- system select may need a reconfirm...
      if(!__pub.reposerver) reconfirm['reposerver'] = true 
      __pub.reposerver = __pub.reposerver || __pub.reposervers[0] 
  
      cacheWriteInstanceConfig(chessinstances, __pub.root, __pub )
  
      Object.defineProperty(__g, 'selectedinstance', {
          get(){ return __pub}
        , set( inst ){ 
          utils.assign(__pub, inst); return __pub  
        }
      })
      return __pub;
    })

  })()

  return pending.then(( selectedinstance)=>{
    // PB : TODO -- Maybe create a new instance so we can switch around for different values...
    shell_verse.init({ statuslog, selectedinstance, processedArgs, runtimestamp, ENV })
    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( {} ); }
      , 'isurlaccessible' : function(args){
        // args.url... .. PB : TODO -- Extract from url
        args = args || {}
        var u = new URL(args.url || selectedinstance.reposerver)
        console.log(u)
        var httpoptions = { hostname : u.host || 'git.bbh.org.in', protocol : u.protocol || 'https'
          , method : 'GET'
          , username : args.username || selectedinstance.username || 'chess'
          , password : selectedinstance.password || 'chess'
        }
        httpoptions.path = args.path || `/`
        return new Promise(function( resolve, reject ){
          RESTAPI.get(httpoptions, function(){
            console.log('URL is accessible')
            resolve(true)
          }, function(){
            console.error('URL is not accessible')
            resolve(false)
          })
        })
      }
      , 'reset': () => {

        // Reset NPM packages semver so major versions can be updated.

        const fs = require('fs')
        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: 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: 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: ENV
            }).catch((e) => { console.error(e) })
            p.position = 3;
            console.log('Three')
            return p;
          }
          , () => {
            var p = nodeShellExec('n', ['latest'], {
              inherit: true, shell: true
              , env: 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.dirname(__dirname))
        console.log('Currently only upgrades ember : ' + path.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.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.dirname(__dirname),
            env: ENV
          })

          step2.on('close', () => {
            nodeShellExec('cmd', ['/c', 'ember', '--version'], {
              stdio: ['pipe', process.stdout, process.stderr],
              inherit: true,
              shell: true,
              cwd: path.dirname(__dirname),
              env: ENV
            })
          })
        })
      }
      , '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 remote = 'origin'

        var sequentialTaskShellCommands = [];
        if (!existsSync(`Z:/${repo}.git`)) {
          sequentialTaskShellCommands = [
            // ['net', ['use', 'Z:', selectedinstance.reposerver.replace('/','\\')], {
            //   inherit : true, shell: true
            //   , env: ENV
            // }]
            ['pwd', { cwd: 'Z:', inherit: true }]
            , ['mkdir', [`${repo}.git`], {
              cwd: `Z:`
              , inherit: true, shell: true
              , env: ENV
            }]
            , ['pwd', { cwd: `Z:/${repo}.git`, inherit: true }]
            , ['git', ['init', '--bare'], {
              cwd: `Z:/${repo}.git`
              , inherit: true, shell: true
              , env: ENV
            }]
            // PB : TODO -- Do this conditionally only...
            , ['git', ['remote', 'rename', remote, 'githubclone'], { cwd: `${instanceroot + '/' + repo}` }, (err) => {
              console.log(`Ignoring ${remote} rename error : ` + err); return true; //return true to continue.
            }] // PB ; Todo -- new repositories created locally will not have origin. Handle this failure.
            , ['git', ['remote', 'add', remote, `${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: ENV
            }])
            console.warn('Adding network drive z: for repo server. ' + sequentialTaskShellCommands[0])
            // throw 'done'
          }
        }

        sequentialTaskShellCommands.push(['git', ['push', remote, '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]
          , branch : args.branch || processedArgs._[4] || 'master'
        }
        __args.upstream = args['upstream'] || processedArgs._[5] || `${__args.remotename}/${__args.branch}`

        // 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 || (args.remote ? args.remote.pushable : false) || args.pushable;
        var remotename = __args.remotename
        var url = __args.url
        var branch = __args.branch
        var upstream = __args.upstream
        console.log('remotename : ' + args.remotename)
        
        var serial_perform_git_seturl = (reponame) => {
          var options = { cwd: instanceroot + '/' + reponame }
          // console.log(reponame)
          var serialcmds = [
            ['git', ['remote', 'set-url', remotename, url + '/' + reponame], { cwd: instanceroot + '/' + reponame }]
          ]
          if (!pushable) {
            serialcmds.push(['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], { cwd: instanceroot + '/' + reponame }])
          }
          
          var requiresElevation = selectedinstance.elevated.find( r => r.repo === reponame)
          serialcmds.push(['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + reponame, requiresElevation }])  // requires elevation based on repo
          serialcmds.push(['git', ['branch', `--set-upstream-to=${upstream}`, branch], { cwd: instanceroot + '/' + reponame }])
          
          return serialcmds
        }

        var x = (xargs) => {
          var tasq = () => {
            // console.log(args)
            var task = (onsuccess, onerror)=>{ 
              return ()=>{
                return nodeShellExec.apply(null, xargs).then( onsuccess ).catch(e => {
                    // We continue on failure.
                    // No such remote
                    if(e.messages[0].search('No such remote') > -1 ){
                      console.log(remotename + ' Remote doesnt exist will add.')
                      return op['remote add']( args )
                    }
                    console.error(util.inspect(e) + ' ' + tasq.toString())
                  })
              }
            }

            if(xargs[2].requiresElevation){
              if(!isElevated) {
                var etask = task( ()=>{ return remotename } )
                etask.statuslog = statuslog
                etask.selectedinstance = selectedinstance
                etask.processedArgs = processedArgs
                etask.runtimestamp = runtimestamp
                etask.ENV = ENV
                return shell_verse.runElevated(etask)
              }  
            }
            return task( 
                () => { fs.writeFileSync('run.done', 'success')}
              , () => { fs.writeFileSync('run.done', 'error') }
            )()
          }
          tasq.toString = function(){ return JSON.stringify(args) }
          return tasq;
        }
        var perform_git_seturl = (dir) => {
          return op['is-git-repo'](dir).then((logEntry) => {
            return any(serial_perform_git_seturl(dir.name).map(x))
          }).catch((e) => {
            console.log(e + ' Failed not recognized as a git repo : ' + dir.name)
          })
        }

        if(args.dir) return perform_git_seturl(args.dir) // do this for a specific repo
        else return dirs(perform_git_seturl) // Do for all
      }
      // , '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']
                'git', ['config', `remote.${__args.remotename}.url`]
                , utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
                  , { 
                      benign : args.benign, ignorefailures : args.ignorefailures, 
                      evaluateResult : function(err, result){ 
                        return [
                              +result.code === 0
                            , result
                        ]
                      } 
                    } , options) ] 
        ]
        var mapped = commands.map(getshelltask)  //.map( p => p.catch(e => e)) // Handle errors later.
        mapped.push( function(prevserialtaskresult) {
          var pt = [false , null]
          if(prevserialtaskresult.error) {
            // Previous task has failed.
            pt[1] = prevserialtaskresult.error[1]
          }
          else pt = prevserialtaskresult;

          console.dir(prevserialtaskresult)
          return getshelltask(['git', ['ls-remote', `${__args.url}`], utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
            , { 
                benign : args.benign, ignorefailures : args.ignorefailures, 
                evaluateResult : function(err, result){
                  if(+result.code !== 0) return [pt, [ false, result]] 
                  // var hasfailed = /^fatal: .*/.test(result.messages.join(' '))
                  return [pt, [true, result] ]
                } 
              } , options) ])().catch( e => {
                console.error(e)
                return [pt, [ false, null]]
              }) 
        })
        return any(mapped, true, false, { accumulatedresults : [] }).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.
        }).catch(e => {
          console.log(e)
          return [0, 0]
        })
      }

      , 'remote refresh' : (args) => {

        var url = args._[2] || selectedinstance.reposerver
        return op['isurlaccessible']({ url }).then(( baccess )=>{
          if(!baccess) {
            var reposerver = selectedinstance.reposerverinstances[url]
            if(!reposerver.external) {
              // Internal server not accessible ask to switch to external.
              console.log('Internal server not accsssible. Will switch to external')
              // console.dir(selectedinstance.reposerverinstances)
              url = reposerver.externalreposervers[0]
            }
            else {
              console.log('External server not accsssible. Will switch to interal')
              // PB : TODO -- Prompt and then switch.
              url = reposerver.internalreposervers[0]
            }
            return op['isurlaccessible']({ url }).then(( baccess )=>{
              if(!baccess) {
                console.log('Neither internal nor external servers are accessible.... Presenting choices...')
                console.log('PB : TODO -- Present appropriate choices...')
                // Redo whole command...
              }
              return dorefresh()
            })
          }
          dorefresh()
          console.log(baccess)
        }).catch((err)=>{ console.error(err) })

        function dorefresh(){
          // if(args.url === selectedinstance.reposerver)  {
          //   // No change. Just refresh with same url anyway. We do not know which of the repos is not up to date and is an outlier. 
          // }
          // else {
          //   // Also refreshs anyway
          // }

          args = args || {}
          var __args = {
              url : args.url || processedArgs._[2] || selectedinstance.reposerver
            // , branch : args.branch || processedArgs._[4]
          }

          var serial_perform = (repo) => {
            // if(repo === 'setup' || repo === 'chess-server-lib'){

              var options = { cwd: instanceroot + '/' + repo }
              console.log('serial_perform : ' + repo)
        
              return [
                ['git', ['remote', '-v'], options]
              ]
            // }
            // else return []
          }

          var x = (args) => {

            // console.log('MapX was called')
            var tasq = () => {
              console.log('--------------------------')
              console.log(args)
              return nodeShellExec.apply(null, args).catch(e => {
                console.log('caught error ------------------------' + JSON.stringify(e))
                // We continue on failure.
                console.error(tasq.toString()  + args[2].cwd)
              })
            }
            tasq.toString = function(){
              // console.log('sadfasdf------------------------')
              return JSON.stringify(args) // PB : TODO -- Is this needed ?
            }
            return tasq;
          }

          var remotenames = (selectedinstance.selectedremotes || []).concat( selectedinstance.permanentremotes )
          var remotes = selectedinstance.reposerverinstances[__args.url].remotes

          // use the repo manifest to create missing remotes.
          function perform_remote_refresh(dir){
            var repo = dir.name
            var ___args = {url : __args.url, repo}
            if(repo === '.elxr') return Promise.resolve(true)
            if(repo === '.git') return Promise.resolve(true)
            if(repo === 'Downloads') return Promise.resolve(true)

            // PB : TODO -- pick up remote definitions per repository...
            var reposmanfiest = utils.assign_core( { keycase : true, arraymergetype : utils.assign_core.DISTINCT_UNION }
              , {}, selectedinstance, loadmanifest( selectedinstance.root + '/' + repo
              , { username : selectedinstance.username, instanceName : selectedinstance.instanceName
              , node_env : selectedinstance.node_env, reposerver : selectedinstance.reposerver }
            ))

            if( !reposmanfiest.error ) {
              var reporemotenames = remotenames.concat(reposmanfiest.selectedremotes || []).concat( reposmanfiest.permanentremotes || [] )
              var reporemotes = utils.assign([], remotes, reposmanfiest.reposerverinstances[___args.url].remotes)
            }
            else {
              var reporemotenames = remotenames
              var reporemotes = remotes
            }
            
            return (()=>{ 
              var promises = []

              return any(serial_perform(repo).map(x)).then(()=>{
                var branch = args.branch || 'master' // PB : TODO -- Dont default branch here.. Let each repos current state define this... ???
                reporemotenames.forEach(rm =>{
                  console.log('Processing : ' + rm + ' ' + dir.name)
                  // if(repo != 'elxr') return //test
                  // if(repo != 'elixir-config-development') return //test
                  // if(repo != 'elixir-server') return //test
                  
                  promises.push( ((rm) => {
                      var remotename = rm 
                      var repodef = selectedinstance.reposindexed[repo];
                      if(!repodef) return

                      // if( repo !== 'cihsr-data') return
                      
                      // username and owner are two different things. The repository (possibly forked) under the username is when the {{owner}} portion of the repo path is the same as the user.
                      // When one user or organiztion shares repos with others through a team without a fork a different user has access to a different {{owner}} path repo.  
                      var remote = reporemotes[remotename]
                      // console.log(repodef)
                      // console.log(remote)
                      var owner = repodef.owner || remote.owner || defaultRepoOwner  // should be based on the server, remote and repo combination.
                      
                      var reposerver = repodef.server || remote.server || selectedinstance.reposerver 
                      // selectedinstance.reposerverinstances[reposerver]
                      var auth = repodef.username ? repodef : remote.username ? remote : selectedinstance.reposerverinstances[reposerver].username ? reposerver : selectedinstance;
              
                      var httpoptions = new URL(reposerver);
                      httpoptions = {
                          hostname: httpoptions.hostname
                          , method: 'GET'
                          , protocol : httpoptions.protocol
                        }
                      httpoptions.username = auth.username  // PB : TODO -- Handle remotes with different username. Also cache git credentials either globally or per repo...
                      httpoptions.password = (auth.password || selectedinstance.password || '') // PB : NOTE URL has some kind of a setter for password which converts to string "undefined" as password which is undesirable.. so we pre resolve and send.
                      // console.log(___args)
                      var repourl = reporemotes[remotename].url + '/' + repo 
                      // PB : TOOD -- USE GITTEA API
                      // op['isurlaccessible']({ url : repourl }).then((baccess)=>{
                      
                      return GITEA.repository.exists( httpoptions, repo, owner ).then((bexists)=>{  
                        console.log(remotename + ' ' + repourl)
                        if(bexists) {
                          console.log(remotename + ' ' + repourl + ' is accessible')
                          return ((remotename)=>{
                              return op['remote set-url']( { dir, remotename, url : reporemotes[remotename].url, remote
                                , repodef : selectedinstance.reposindexed[repo] } ) // PB : TODO -- Handle add-url
                            })(remotename)
                            // get upstream remote choice from user !!!
                            // PB : TODO -- Set upstream  , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], { cwd: instanceroot + '/' + repo }]
                        }
                      }).catch(e => { 
                        console.warn(remotename + ' ' + repourl + ' ' + e) // Skip nonexistant not necessarily quietly
                      })
                    })(rm)
                  )
                })
                return Promise.all(promises).then( accessibleremotes => {
                    while(!accessibleremotes[accessibleremotes.length -1] && accessibleremotes.length) accessibleremotes.splice(accessibleremotes.length -1, 1) 
                    
                    if(accessibleremotes.length) {
                      ((remotename)=>{
                        var upstream = `${remotename}/${branch}`   
                        var remote = reporemotes[remotename]
                        return op['remote set-url']( { dir, remotename, url : reporemotes[remotename].url, remote
                          , upstream 
                          , repodef : selectedinstance.reposindexed[repo] } ) // PB : TODO -- Handle add-url
                      })( accessibleremotes[accessibleremotes.length -1] )
                    }
                }).catch((e) => { console.log('Processing Error : ' + dir.name); console.error(e); return { error: true, message: repo } })
              }) 

            })()
          }
          
          if(isElevated) { 
            var elevatedpromises = []
            selectedinstance.elevated.forEach( r => { elevatedpromises.push(perform_remote_refresh({ name : r.repo })) } )
            return Promise.all(elevatedpromises)
          }
          else 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 $i; done;'
        // args === processedArgs ? args = {} : null;
        var __args = {
            remotename : args.remotename|| processedArgs._[2]
          , reponame : args.reponame || (args.repodef ? args.repodef.repo : undefined)
          , url : args.url || processedArgs._[3]
          , branch : args.branch || processedArgs._[4] || 'master'
        }
        __args.upstream = args['upstream'] || processedArgs._[5] || `${remotename}/${branch}`
      
        var remotename = __args.remotename
        var url = __args.url
        var branch = __args.branch
        var upstream = __args.upstream

        var pushable = processedArgs.pushable || (args.remote ? args.remote.pushable : false) || args.pushable;
        
        var serial_perform_git_add = (reponame) => {
          var options = { cwd: instanceroot + '/' + reponame }
          // console.log(reponame)
          if (pushable) {
            var gacmds =  [
                ['git', ['remote', 'add', remotename, url + '/' + reponame], { cwd: instanceroot + '/' + reponame }]
              , ['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + reponame }]
              // , ['git', ['branch', `--set-upstream-to=${upstream}`, branch], { cwd: instanceroot + '/' + reponame }]
            ]
          }
          else {

            var gacmds =   [
                ['git', ['remote', 'add', remotename, url + '/' + reponame], { cwd: instanceroot + '/' + reponame }]
              , ['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], { cwd: instanceroot + '/' + reponame }]
              , ['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + reponame }]
              // When we add a remote it should not automatically become the upstream. The upstream should be a chosen remote else we do not change   
              // , ['git', ['branch', `--set-upstream-to=${upstream}`, branch], { cwd: instanceroot + '/' + reponame }]
            ]
          }
          if(__args['upstream']) gacmds.push(['git', ['branch', `--set-upstream-to=${upstream}`, branch], { cwd: instanceroot + '/' + reponame }])
          return gacmds
        }
        
        // PB : TODO -- Accumulate using yield... and finally return a set of tasks or promises...
        var perform_git_add = (dir) => {
          return op['is-git-repo'](dir).then((logEntry) => {
            // console.log(code)
            if (logEntry.success) {
              return 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.')
                return remotename;
              })
              .catch((e) => {
                return perform( serial_perform_git_add, dir.name ).then(()=>{
                  return remotename
                })
              })
            }
            // else console.log('Skipped : Not a Git Repo : ' + dir.name) 
          }).catch((e) => {
            console.log('Failed : ' + dir.name)
          })
        }

        if(__args.reponame) { return perform_git_add( { name : __args.reponame} ) }
        else return dirs(perform_git_add)
      }
      , 'remote remove': (args) => {
        
        var __args = {
          remotename : args.remotename|| processedArgs._[2]
        }
        var remotename = __args.remotename
        var serial_perform_git_remove = (repo) => {
          var options = { cwd: instanceroot + '/' + repo }
          // console.log(repo)
          return [
            ['git', ['remote', 'remove', remotename], { cwd: instanceroot + '/' + repo }]
          ]
        }
        
        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(getnodeshellexectask))
              })
                .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)
          })
        }

        dirs(perform_git_remove)
      }
      , 'get-remotes' : (args) => {
        // var __args = {
        //   repo : args?.repo || processedArgs._[1]
        // }

        var repo = args.repo

        var serial_perform = (repo) => {
          return  [
            ['git', ['remote', '-vvvv'], { cwd: instanceroot + '/' + repo, 
                evaluateResult : function( issuccess, result){
                  if(!issuccess || +result.code !== 0) throw Object.assign( new Error('git branch -vvvv crashed'), result);
                  
                  var lines = result.messages.join('').split('\n')
                  var remotes = {}
                  lines.forEach(line => {
                    // pattern = origin	https://git.bbh.org.in/chess/elxr (fetch)
                    var match = new RegExp(`(\\S+)\\s(\\S+)/${repo}.git\\s\\((\\S+)\\)`).exec(line)
                    if(match) { 
                      var r = remotes[match[1]] || (remotes[match[1]] = {  title : match[1] })
                      if(match[3] === 'push') { r.push = match[2] }
                      else r.url = match[2]
                    }
                  })
                  return remotes
                }}]
          ]
        }

        return perform( serial_perform, repo )
      }
      , 'get-remote' : (upstream) => {
        // var __args = {
        //   repo : args?.repo || processedArgs._[1]
        // }

        var repo = upstream.repo

        var serial_perform = (repo) => {
          return  [
            ['git', ['remote', '-vvvv'], { cwd: instanceroot + '/' + repo, 
                evaluateResult : function( issuccess, result){
                  if(!issuccess || +result.code !== 0) throw Object.assign( new Error('git branch -vvvv crashed'), result);
                  
                  // origin	https://git.bbh.org.in/chess/elxr (fetch)
                  var match = new RegExp(`${upstream.remotename}\\\s(\\S+)/${repo}.git\\s\\(fetch\\)`).exec(result.messages.join(' '))
                  if(match) { upstream.url = match[1] }
                  else throw Object.assign( new Error('No upstream found for active branch'), result)
                  return upstream
                }}]
          ]
        }

        return perform( serial_perform, repo )
      }
      , 'get-upstream' : (args) => {

        var __args = {
          repo : args?.repo || processedArgs._[1]
        }

        var repo = __args.repo

        var serial_perform = (repo) => {
          return  [
            ['git', ['branch', '-vvvv'], { cwd: instanceroot + '/' + repo, 
                evaluateResult : function( issuccess, result){
                  if(!issuccess || +result.code !== 0) throw Object.assign( new Error('git branch -vvvv crashed'), result);
                  
                  var match = /\*\s(\S+)\s\S+\s\[(\S+)\/(\S+).*?\].*?/.exec(result.messages.join(' '))
                  if(match) { var upstream = { remotename : match[2], branch : match[1], remotebranch : match[3] } }
                  else throw Object.assign( new Error('No upstream found for active branch'), result)
                  
                  if(args?.remotes) {
                    var r = args.remotes[upstream.remotename];
                    if(!r) return op['get-remote'](upstream)  
                    
                    r.branch = upstream.branch
                    r.remotebranch = upstream.remotebranch
                    return r
                  }
                  return op['get-remote'](upstream)
                }}]
          ]
        }

        return perform( serial_perform, repo )
      }
      , 'init-gitea': (username) => {
        // Change user to an object that has user.username and use here.. 
        username = username || processedArgs._[1]
        if (!username) throw 'User name required'
        var serial_perform_init_gitea = (repo) => {
          var options = { cwd: instanceroot + '/' + repo }
          // console.log(repo)
          return [
              ['git', ['remote', 'add', 'chess', `${selectedinstance.reposerver}/${username}/${repo}.git`], { cwd: instanceroot + '/' + repo }]
            , ['git', ['remote', 'set-url', '--push', 'chess', 'no-pushing'], { cwd: instanceroot + '/' + repo }]
            , ['git', ['remote', 'set-url', 'userfork', `${selectedinstance.reposerver}/${username}/${repo}.git`], { cwd: instanceroot + '/' + repo }]
          ]
        }
        
        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) => {
                perform( serial_perform_init_gitea, dir.name )
              })
            }
            // else console.log('Skipped : Not a Git Repo : ' + dir.name)
          }).catch((e) => {
            // console.log('Failed : ' + dir.name)
          })
        }

        dirs(perform_init_gitea)
      }
      , 'syncmaster': (label) => {
        // Usage :
        // elxr pull -- Defaults to run config

        console.log('Running exlr pull : ' + path.dirname(__dirname))

        if (!processedArgs.runas) gitRepos.map((def) => {
          if (exludeMergeRepos[def.repo]) return Promise.resolve({ 'skipped': true })
          else performPull(def, def.branch || 'master')
        })
        var etask = ()=>{ 
          return any(elevatedRunasRepos.map((def) => 
          {
            if (exludeMergeRepos[def.repo]) return Promise.resolve({ 'skipped': true })
            else performPull(def, def.branch || 'master')

          })).then(() => {
            fs.writeFileSync('run.done', 'success')
          }).catch(() => {
            fs.writeFileSync('run.done', 'error')
          })
        }
        etask.statuslog = statuslog
        etask.selectedinstance = selectedinstance
        etask.processedArgs = processedArgs
        etask.runtimestamp = runtimestamp
        etask.ENV = ENV
        return shell_verse.runElevated(etask)
      }

      , '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: 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: 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'
        }

        var sourcerepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.sourcerepo}-${args.folder}`
          // , stdio: ['pipe', process.stdout, process.stderr]
          , inherit: true,
            shell: true,
            env: ENV
          , runas: processedArgs.runas
        }
        var targetrepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.targetrepo}-${args.folder}` 
          // , stdio: ['pipe', process.stdout, process.stderr]
          , inherit: true,
            shell: true,
            env: 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: 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']) // Will pull repos...
        op['npmi'].statuslog = statuslog
        tasks.push(shell_verse.getNonElevatedTask(op['npmi']))  // We do not run npm i with elevated privilege for security reasons.
        

        // 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: 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: ENV
                , title: `npm run build for ${repo}`
              }).then(Tasq.then).catch(Tasq.catch)
            })
          })
        })

        return any(tasks).then(() => {

          gitRepos.push({ repo : 'chess-server-lib/server'});
          gitRepos = gitRepos.concat(elevatedRunasRepos);
          // console.dir(gitRepos)
          // throw ""

          // gitRepos = [
          //   // 'bbhverse', 'serververse', 'elixir-server', 
          //   // 'clientverse', 
          //   'client'
          // ];
          var rmtasks = []
          var repotasks = []
          var env = Object.assign({}, ENV)
          delete env.NODE_ENV // PB : TODO -- Why delete ??? npm i fails with 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: 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;
                })
            }
          })

          // NODE_ENV=development DEBUG=loopback:connector:mssql node --tls-min-v1.0 --inspect elixir/server.js
          // 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_ENV 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'}]
          var bowertasks = []
          bowerRepos.forEach(repodef => {
            bowertasks.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: 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)).then(()=>any(bowertasks));
        }).catch(e => {
          console.error(e)
        }).finally(statuslog.finally)

      }
      , 'start': (args) => {
        // Usage : elxr start {{instanceName=elixir}} {{all||server||client||{{microserviceName=elixir||express}}}}

        var label = clioverrides.cmd
        var env = Object.assign({}, ENV); // Shallow clone it.
        var nodecmd = clioverrides.node_env === 'development' ? 'nodemon' : 'node';
        
        function startFn( o ){
          var cmd = [nodecmd, [`--inspect=${o.debugport}`, '--preserve-symlinks', o.script]]
          console.log(`Starting ${o.name}.`);

          if(shell_verse.iswin()){
            var __cmd = 'cmd'
            var a1 = '/k'
          }
          else if(shell_verse.islin()) {
            var __cmd = 'sh'
            var a1 = '-c'
          }

          if(o.cmd) {
            cmd = o.cmd
            var childPromise = nodeShellExec(...o.cmd, {
              // inherit : true,
              shell: true,
              detached: true,
              stdio: 'ignore',
              cwd: instanceroot + o.path
              , env
            })
          }
          else {
            var childPromise = nodeShellExec(__cmd, [a1, getCmdString(cmd) ], {
              // inherit : true,
              shell: true,
              detached: true,
              stdio: 'ignore',
              cwd: instanceroot + o.path
              , env
            })
          }

          var child = childPromise.process;
          var cpid = child.pid
          childPromise.then(()=>{
              console.log(`  *** started ${o.name} PID(${cpid}) ${cmd}`);
              fs.writeFileSync(o.pidstore, '' + cpid)
            })
            .catch(e => console.error(e) )
        }

        if(clioverrides.node_env === 'development') {
          env.DEBUG = 'loopback:connector:' + dbForLabel(label)
          
          if(!processedArgs._[2]) processedArgs._[2] = 'all' 
          if(processedArgs._[2] === 'server' || processedArgs._[2] === 'all' 
            || processedArgs._[2] === 'elixir' // specific microservice name.
          ) {
            startFn( { debugport : 9228, script : 'elixir/server.js', name : 'Elixir Loopback Server', path : '/' + 'elixir-server'
              , pidstore : '.elixir-server.elixir.server.pid'
            } )
          }
          if(processedArgs._[2] === 'server' || processedArgs._[2] === 'all' 
            || processedArgs._[2] === 'express' // specific microservice name.
          ) {
            startFn( { debugport : 9227, script : 'bin/www', name : 'Express Server', path : '/' + 'chess-server-lib/server'
              , pidstore : '.express.server.pid'
            } )
          }
        
          if(processedArgs._[2] === 'client' || processedArgs._[2] === 'all') {
            startFn( { 
                name : 'Elixir Ember Client', path : '/' + 'client'
              , cmd : ['node_modules/ember-cli/bin/ember', ['s']]
              , pidstore : '.client.server.pid'
            } )
          }
        }

      }
      , 'stop': (label) => {
        const kill = require('tree-kill');

        try{
          var serverPid = fs.readFileSync('.elixir-server.elixir.server.pid', { encoding: 'utf8'})
          fs.unlinkSync('.elixir-server.elixir.server.pid')
          console.log(serverPid)
          kill(serverPid)
        }
        catch(e){ console.error(e) }

        try{
          serverPid = fs.readFileSync('.express.server.pid', { encoding: 'utf8' })
          fs.unlinkSync('.express.server.pid')
          console.log(serverPid)
          kill(serverPid)
        }
        catch(e){ console.error(e) }

        try{
          serverPid = fs.readFileSync('.client.server.pid', { encoding: 'utf8' })
          fs.unlinkSync('.client.server.pid')
          console.log(serverPid)
          kill(serverPid)
        }
        catch(e){ console.error(e) }
      }
      , 'model' : () => {
        var etask = ()=>{ 
          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: ENV
              }).catch((e) => { console.error(e) })
              return p;
            }
          ];
          return any(tasks).then(() => {
            fs.writeFileSync('run.done', 'success')  // PB : TODO -- IPC through files is needed only for windows.
          }).catch(() => {
            fs.writeFileSync('run.done', 'error')
          })
        }
        etask.statuslog = statuslog
        etask.selectedinstance = selectedinstance
        etask.processedArgs = processedArgs
        etask.runtimestamp = runtimestamp
        etask.ENV = ENV
        return shell_verse.runElevated(etask)
      }


      , '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],
        */
        // 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') } // PB : TODO -- IPC through files is needed only for windows.
          if (existsSync('config') && existsSync('data')){
            return
          }
        }

        var tasks = [
          () => {
            var promise = new Promise((resolve, reject)=>{
              existslink('config', function(err, data){
                if(data) { 
                  var p = shell_verse.removeJuncionOrLink('config')
                  .then(()=>{resolve(true)})
                  .catch((err) => { console.log('Ignoring benign error : ' + err); return resolve(true); })
                }
                else resolve(false)
              })
            })
            return promise;
          },
          () => {
            var promise = new Promise((resolve, reject)=>{
              existslink('data', function(err, data){
                if(data) { 
                  var p = shell_verse.removeJuncionOrLink('data')
                  .then(()=>{resolve(true)})
                  .catch((err) => { console.log('Ignoring benign error : ' + err); return resolve(true); })
                }
                else resolve(false)
              })
            })
            return promise;
          },
        ];
        runconfig.NODE_ENV = ENV.NODE_ENV = ENV.NODE_ENV || runconfig.NODE_ENV || 'development';
        if (processedArgs._[1] && runconfig.use !== processedArgs._[1]) runconfig.use = processedArgs._[1];
        if (!runconfig.use && selectedinstance.instanceName) runconfig.use = selectedinstance.instanceName;
        if (!runconfig.use) { throw 'unspecifed use not allowed. Please specify chess instance name.' }
        fs.writeFileSync(instanceroot + '/run.js', 'module.exports = ' + JSON.stringify(runconfig))

        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 enqueueCheckout = function(def){ enqueue(elevatedqueue, performCheckout, def) }
        // var enqueueMerge = function(def){ enqueue(elevatedqueue, performMerge, def) }

        var elevatedqueue = [];
        var enqueueOnce = (queue, task, def) => {
          var found = queue.find(element => { 
            var keys = Object.keys( element ) 
            for(var k=0; k < keys.length; k++) { 
              if(element[keys[k]] !== def[k]) return false;
            } 
          })
          queue.push(function(){ return task(this)}.bind(def));
        }
        var enqueue = (queue, task, def) => {
          queue.push(function(){ return task(def)}.bind(def));
        }

        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 task = ()=>{

            // Default target is developent. if some other target is specified in NODE_ENV in for shell call for the 'use' command we will switch to that target..
              //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) })
              })
          }
          task.statuslog = statuslog
          var netask = shell_verse.getNonElevatedTask(task)
          
          var eltask = ()=> {
            var opts = {
              inherit: true, shell: true
              , cwd : instanceroot
              , env: ENV
            }
            var tasks = [
              () => {
                // Use junctions to avoid npm package issues
                var target = runconfig.use + '-' + 'config' + '-' + ENV.NODE_ENV
                var p = shell_verse.createJuntionOrLink('config', target, opts)
                return p;
              }
            ];
            // if (processedArgs._[1]) {
              tasks = tasks.concat( [
                  () => {
                    var dataToLink = runconfig.use + '-data' + '-' + ENV.NODE_ENV
                    if(!existsSync(dataToLink)) dataToLink = runconfig.use + '-data';
                    var p = shell_verse.createJuntionOrLink('data', dataToLink, opts)
                    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')
                })
            })
          }
          eltask.statuslog = statuslog
          eltask.selectedinstance = selectedinstance
          eltask.processedArgs = processedArgs
          eltask.runtimestamp = runtimestamp     
          var eltask = shell_verse.getElevatedTask(eltask)  

          return eltask().then( ()=>{ return netask() })

        }).catch((e) => {
          fs.writeFileSync('run.done', 'error : ' + e)
        })

        // 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 model [modelname] => generate a model named [modelname]');
          console.log('elxr g vmodel [modelname] => generate a model named [modelname]');
          console.log('elxr g vmodel  [modelname] --server=true => generate only a server model named [modelname]');
          console.log('elxr g vmodel  [modelname] --all=true => default generate server and client model named [modelname]');
          console.log('elxr g => regenerate all known models');
          return
        }
        // var child = nodeShellExec('mkdir', ['-p', label], { inherit : true} );
        // try {
        //     child = child.on('close', () => { process.chdir(label) } );
        // }
        // catch (err) {
        //     console.log('chdir: ' + err);
        // }
        // child.on('close', function(){
        // var options = {
        //       shell : true 
        //     , inherit : true
        //     // , cwd : '' + process.cwd
        //     // , env : ENV
        // };
        // nodeShellExec('git', ['init'], { inherit : true});
        if (0) {
          // PB : TODO -- Special google chrome profile for tests etc.
          nodeShellExec('pwd', { inherit: true });          
          // /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"
          // "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/item
          // "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/tests/index.html?grep=loopback
          nodeShellExec("C:/Program Files (x86)/Google/Chrome/Application/chrome.exe", [
            "--profile-directory=Profile 1"
            , 'http://localhost:4200/tests/index.html?grep=model convert ember to loopback' + '&filter=none' /*+ '&filter=model convert ember to loopback'*/]);

        }
        // 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]);
            var step1 = nodeShellExec('cmd', ['/c', 'ember', 'new', processedArgs._[2]], {
              stdio: ['pipe', process.stdout, process.stderr],
              inherit: true,
              shell: true,
              cwd: path.dirname(__dirname),
              env : ENV
            })
          },

          'modelr': () => {
            var tasks = [
              () => {
                var p = nodeShellExec('"ember"', [
                  'g'
                  , 'modelr'
                  , processedArgs._[2]], {
                  inherit: true, shell: true, env: 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.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: 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)

          }

          , 'undefined' : ()=>{
            console.warn('Are you sure you want to refresh all the models.');
            throw 'NOT YET IMPLMENTED'
          }

          , 'vmodel' : (options)=>{
            // node --inspect-brk elxr/index.js g vmodel qlabresults --server=true
            options = options || {
              generate : processedArgs['all'] ? 'all' :  processedArgs['server'] ? 'server' : processedArgs['client'] ? 'client' : null
            }

            if(!options.generate) return 'Nothing specified for generation'
            
            var name = processedArgs._[2];
            if(!name) return 'No name specified for generation'
            var templateverse = `${selectedinstance.root}/bbhverse/__universe__/vmodel`
            // var templateverse = `${selectedinstance.root}/bbhverse/__universe__/vmodel/__base__-server-lib/common/lib`
            
            var workingtarget = `${selectedinstance.root}/.elxr/run-${runtimestamp}/temp/vmodelworkingdir`
            var destination = `${selectedinstance.root}`

            // Create a tmp working copy for staging the changes.
            return copyrecursive(templateverse,  workingtarget).then( r => {

              var base = 'chess'  // -- The server base from where this instance was dervied from.
              var patternsubstitutions = [ 
                  { strOrregexp : /(__name__)/g, substitutes : [name]} 
                , { strOrregexp : /(__instance__)/g, substitutes : [selectedinstance.instanceName]}
                , { strOrregexp : /(__base__)/g, substitutes : [base]}
                , { strOrregexp : /(__microservice__)/g, substitutes : [selectedinstance.microservice || selectedinstance.instanceName]}
                , { strOrregexp : /(__microclient__)/g, substitutes : [selectedinstance.microclient || `${selectedinstance.instanceName}-client` || 'client']} // PB : TODO -- elixir-client etc... use a config to find the microclient..
              ] 
              var options = { source : templateverse, target : workingtarget
                  , base , destinationroot : destination, workingtarget
                  , processingtype : 'inplace', sourcetype : 'filesystem', patternsubstitutions }
              
              var actions = [
                fswalk( workingtarget, options
                  , [ function(t, o){
                      
                      // A series of tasks to be executed on each pattern in patternsubstitutions.
                      return any([ 
                        // PB : TODO -- Contentreplace is better addressed in memory instead of file IO so do all regexps in sequence in one shot and then rename.
                            ()=>{ return fscontentreplace( t, o ) }
                          , ()=>{ return fsrename( t, o ) }
                        ])
                    }] )
                  // Post process links in place.
                  , () => dirs((innernode, s,  t, o ) => fswalk( path.join(workingtarget, innernode.name), utils.assign({}, o, { innernode }), [ templatelink ] )
                      , workingtarget, null, options)
                    // Move to the final destination. Whole tree should move only top level folders are required.
                  // , () => fswalk( workingtarget, options, [ fsrename ])
                  // , () => dirs( ( child, src, target, options )=>{ return fs.renameSync(path.join(src, child.name), path.join(target, child.name) )  }
                                        // , workingtarget, destination )
              ]

              return any(actions);

            })
            
          }
        }

        g[processedArgs._[1]]();
      }
      , 'launchui' : () => {
          console.log('-----------------------------')
          console.log('Launching Elxir Admin Console')
          console.log('-----------------------------')
          // shell_verse.getchrome()

          processedArgs.awaitrun = true;
          return shell_verse.launchui()
          // shell_verse.getchrome().then( chrome => {

          //   nodeShellExec( `"${chrome}"`, [
          //       '--profile-directory="chess"'
          //     , `${selectedinstance.root}/elixir-client/elxr-admin-console/html/index.html`], {
          //     inherit: true, shell: true
          //     , env: ENV
          //   })
          //   .catch(e => console.dir(e))
          // }) 
        }
      , '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) }
    }

    Object.keys(op).forEach( oper => {
      if(cmds[oper]) return

      cmds[oper] = {}
      // cmds[oper] = {
      //   // return a interpreted set of arguments for this cmd run context.
      //   interpret() { return { cmd : oper, runchoice : 'c' } }  
      // }
    })

    var elxrcmd = (function(){

      var __cmdprototype = function(){}
      function subcommandlabelFor(cmd, sub){ return (`${cmd} ${sub || ''}`).trim() }

      var __cmd = { 
          interpret() { 
              var interpreted = {}
              // Non custom command has universal positiona args.
              processedArgs._[1] ? interpreted.instanceName = processedArgs._[1] : null;
              interpreted.runchoice = processedArgs._[0] || selectedinstance.runchoice;
              // 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 } }
              // }
              // ... PB : TODO -- use  cmd.toArgs
              interpreted.cmd = this.cmd 
              return interpreted 
          }
        , getPossiblePrompts(){ return { username : true, password : true, instanceName : true, instanceType : true, reposerver : true } }
        , cmdFn : ()=>{ throw "Elxr Unknown command."}
        , finalized : true
        , toArgs : function( o ){ 
          // PB : TODO -- need to call this before selectedinstance is built. The instanceName is dependent on the specific cmd.
          return o }
      }

      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 = utils.assign_core( { keycase: true, arraymergetype : utils.assign_core.DISTINCT_UNION }
          , {}, __cmd, cmds[o.cmd], o)
        cmds[o.cmd] = created;
        created.cmdFn = op[o.cmd] || o.cmdFn || created.cmdFn  
        op[o.cmd] = created.cmdFn;
        noprerequisites[o.cmd] = created.noprerequisites 
        return created.cmdFn;
      }

      function create(o){ return __createO(o) }
      __cmdprototype.create = create;

      return __cmdprototype; 
    })()

    var cmdFns = {
      resetgitconfig, reinit, init, g : op['g'], 'get-upstream' : op['get-upstream']
    }

    Object.entries(cmds).forEach( ca => {
      ca[1].cmd = ca[0]
      ca[1].cmdFn = ca[1].cmdFn || cmdFns[ca[0]]
      elxrcmd.create( ca[1] )
    })

    shell_verse.cmds = cmds;

    var __default = selectedinstance; // PB : TODO -- Eliminate __default references.
    
    Tasq.addlistener(statuslog.statuslog)

    // Instead of waiting for the root to be establised we start working at the current locatoin and then relocate when root changes.
    var runlogjson = `${selectedinstance.root}/.elxr/run-${runtimestamp}/run.log`
    ensureDirectoryExistence(runlogjson)
    fs.writeFileSync(runlogjson, JSON.stringify( { message : `Started ${runtimestamp}`, success:true})) // Initialize a new log file with "logrotate" for every run
    Tasq.addlistener((e)=>{ fs.writeFileSync(runlogjson, ', ' + JSON.stringify( e ), { 'flag': 'a+' }) })
    
    var nodeShellExec = cli.nodeShellExec;
    var chalk = require('chalk')
    const homedir = require('os').homedir();

    function sysAddPathVar(addpath){
      // Object.assign({
      //   inherit: true, shell: true, env: ENV, title: `${command} ${args}`
      // }, options)
      
      // powershell $env:Path -split ';'
      var etask = ()=>{ 
        return nodeShellExec('Powershell.exe', [
            `$path = [Environment]::GetEnvironmentVariable('PATH', 'Machine')
            $newpath = $path + ';${addpath}'
            [Environment]::SetEnvironmentVariable("PATH", $newpath, 'Machine')` 
          ]).then(() => {
            fs.writeFileSync('run.done', 'success') // PB : TODO -- IPC through files is needed only for windows.
          }).catch(() => {
            fs.writeFileSync('run.done', 'error')
          })
      }
      etask.statuslog = statuslog
      etask.selectedinstance = selectedinstance
      etask.processedArgs = processedArgs
      etask.runtimestamp = runtimestamp
      etask.ENV = ENV
      return shell_verse.runElevated(etask)
      
      
      // var newpath = addpath.split(';');
      // newpath.push(addpath)
      // newpath = Array.from(new Set(newpath)).join(';')
      // // addpath.split(';').forEach(pel => { var kv = pel.split('='); kv[0] === key ? null : newpath.push(pel);  } )
      // // setx /M PATH "%PATH%;<path-to-executable-folder>"
      // // %AppData%\npm
      // return nodeShellExec('setx', ['/m', 'PATH', `%PATH%;${addpath}` ]);
    }

    // singleton one time lazy
    var getCredentials = function(){

      // try {
        // First call
        var creds = fs.readFileSync(path.normalize(`${homedir}/.elxrcredentials`), { encoding: 'utf8' });
        var creds = creds.split('\n').map( c => c.trim() && new URL(c));
        console.log(creds);
        creds.forEach(cred => {console.log( cred.hostname ); console.log( cred.username )}  );
      // }
      // catch(e){
      //   console.warn('Credentials not cached. You will be prompted for username and password.')
      // }

      // Subsequent calls
      getCredentials = ()=>{ return creds }
      return getCredentials();
    }

    // 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])) == '') {

    //   }
    // })

    const { readdir } = require("fs").promises

    // Directory shallow walk and do perform on each dir.
    const dirs = async (perform, src, target, options) => {
      var rs = []
      for (const dir of await readdir(src || selectedinstance.root, { withFileTypes: true })) {
        if (dir.isDirectory()) rs.push( perform(dir, src, target, options) )
      }
      return any(rs)
    }

    var fsMove = async function(from, to, options) {
        
      if(!options?.innernode) {
        var exists = fs.existsSync(from);
        var stats = exists && fs.statSync(from);
        var isDirectory = exists && stats.isDirectory();
      }
      else {
        var isDirectory = options.innernode.isDirectory() 
      }

      if(!isDirectory) return fs.renameSync(from, to)
      
      fs.mkdirSync(to, { recursive : true })

      var rs = [];
      for (const innernode of await readdir(from, { withFileTypes: true })) {
        rs.push( fsMove( path.join(from, innernode.name), path.join(to, innernode.name), { innernode } ) ) 
      }

      return any(rs)
    };



    // PB : TODO -- Should return a bunch of promises to wait for...
    var copyrecursive = async function(src, target, options) {
        
      if(!options?.innernode) {
        var exists = fs.existsSync(src);
        var stats = exists && fs.statSync(src);
        var isDirectory = exists && stats.isDirectory();
      }
      else {
        var isDirectory = options.innernode.isDirectory() 
      }

      if(!isDirectory) return fs.copyFileSync(src, target)
      
      fs.mkdirSync(target, { recursive : true })

      var rs = [];
      for (const innernode of await readdir(src, { withFileTypes: true })) {
        rs.push( copyrecursive( path.join(src, innernode.name), path.join(target, innernode.name), { innernode } )
          // .then(()=>{
          //   return any(actions.map( a => ()=>a(dir, { isDirectory : true}) ))
          // }) 
        ) 
      }

      return any(rs)


      // return fswalk( src, {}, [ 
      //     (src, options)=> { 
      //       if(options.innernode.isDirectory()) fs.mkdirSync(options.target, { recursive : true }) 
      //       else fs.copyFileSync(src, options.target)
      //     }
      //  ])

      // var exists = fs.existsSync(src);
      // var stats = exists && fs.statSync(src);
      // var isDirectory = exists && stats.isDirectory();
      // if (isDirectory) {
      //   fs.mkdirSync(dest, { recursive : true });
      //   return dirs( function(childItemName) {
      //     return copyrecursive(path.join(src, childItemName.name),
      //                       path.join(dest, childItemName.name));
      //   }, src )
      // } else {
      //   fs.copyFileSync(src, dest);
      // }
    };

    // var renamerecursive = function(from, to){
    //   var exists = fs.existsSync(from);
    //   var stats = exists && fs.statSync(from);
    //   var isDirectory = exists && stats.isDirectory();
    //   if (isDirectory) {
    //     fs.mkdirSync(to);
    //     dirs( function(childItemName) {
    //       renamerecursive(path.join(from, childItemName),
    //                         path.join(to, childItemName));
    //     }, from )
    //     // fs.readdirSync(from).forEach(function(childItemName) {
    //     //   copyrecursive(path.join(from, childItemName),
    //     //                     path.join(to, childItemName));
    //     // });
    //   } else {
    //     fsrename(from, to);
    //   }
    // }

    // filesystem walk
    const fswalk = async (pathToWalk, options, actions) => {
      // options = options || { depthfirst : true }
      
      if(!options.innernode) {
        var exists = fs.existsSync(pathToWalk);
        var stats = exists && fs.statSync(pathToWalk);
        var isDirectory = exists && stats.isDirectory();
      }
      else {
        var isDirectory = options.innernode.isDirectory() 
      }

      if(!isDirectory) return any(actions.map( a => ()=>a( pathToWalk, utils.assign({}, options
        , { pathToWalk, innernode : options.innernode || { isDirectory : function(){ return true } } }) ) ))
      
      var rs = [];
      for (const innernode of await readdir(pathToWalk, { withFileTypes: true })) {
        rs.push( fswalk( path.join(pathToWalk, innernode.name), utils.assign({}, options, {pathToWalk, innernode }), actions )
          // .then(()=>{
          //   return any(actions.map( a => ()=>a(innernode, { isDirectory : true}) ))
          // }) 
        ) 
      }
      // Wait for the walk to complete before renaming directories.
      Array.prototype.push.apply(rs, actions.map( a => ()=>a( pathToWalk, utils.assign({}, options
        , { pathToWalk, innernode : options.innernode || { isDirectory : function(){ return true } } } ) ) ))

      return any(rs)
    }

    var fsrecurse = function(target, options, actions, root) {
      var exists = fs.existsSync(target);
      var stats = exists && fs.statSync(target);
      var isDirectory = exists && stats.isDirectory();
      if (isDirectory) {
        var tasks = []
        tasks.push( dirs( function(childItemName) {
          return fsrecurse(path.join(target, childItemName.name)
            , options, actions, root);
        }, target ))
        return any(tasks)
      } else {
        var prevActionResult = null;
        return any( actions.map( (action) =>   prevActionResult = action.apply(null, target, options) ))
      }
    };

    // var fslink = function(to, options){  try { fs.linkSync( to, options.from ) } catch(e) { throw e } }
    var fslink = function(to, options){ fs.symlinkSync( to, options.from /*, type = "junction"*/ ) }

    var fsrename = function(target, options){ 
      // PB : TODO -- streaming and async.. target could be a stream a string or a filesystem item or a tree node... 

      var targetname = options.innernode?.name || path.parse(target).base;
      var replaced = targetname;
      
      options.patternsubstitutions.forEach( ps => { replaced = regexreplaceall( replaced, ps ) })
      if(replaced && replaced !== targetname) {
        var tr = target.replace( targetname, replaced )
        fs.renameSync(target, tr) 
        return tr;
      }
      else return replaced
    }

    var fscontentreplace = function( target, options ){ 
      // do many replacements in one shot in the file.
      if(options.processingtype === 'inplace' && options.sourcetype === 'filesystem' && !options.innernode.isDirectory() ) {
        var content = fs.readFileSync(target, { encoding: 'utf8' }) // PB : TODO -- streaming and async..
        options.patternsubstitutions.forEach( ps => { content = regexreplaceall( content, ps ) })
        fs.writeFileSync(target, content)
      }
    }

    var templatelink = function(target, options){
      var targetSubPath = target.replace(options.workingtarget + '/', '' );
      var targetSubPathsplit = targetSubPath.split("/")
      var targetPathBaseDir = `${targetSubPathsplit[0]}/${targetSubPathsplit[1]}`

      var linkToSubPathReplacement = `${options.base}-server-lib/common`

      // var rgxp = new RegExp(`(__link__)${options.base}-server-lib`, "g")
      var rgxp = new RegExp(`(__link__${options.base}-server-lib)`, "g")
      var linkToSubPath = targetSubPath
      var b = target.match(rgxp)
      var linkFromName  = regexreplaceall( target, { strOrregexp : rgxp, substitutes : [ '' ] } )
      linkFromName = linkFromName.replace(options.workingtarget, options.destinationroot)
      
      if( b ) {
        // Only if the pattern matches which is link instruction.
        linkToSubPath = regexreplaceall( linkToSubPath, { strOrregexp : rgxp, substitutes : [ '' ] } )
      }
      
      options.patternsubstitutions.forEach( ps => { linkToSubPath = regexreplaceall( linkToSubPath, ps ) })
      var linkToName = `${options.destinationroot}/${linkToSubPath}`

      if(b){
        linkToSubPath = linkToSubPath.replace( targetPathBaseDir, linkToSubPathReplacement)

        // PB : DONT DELETE EVERYTHING ??? Only the linkable ones... Or use an add strategy without deleting...
        fs.unlinkSync( target ); 
        fslink( `${options.destinationroot}/${linkToSubPath}`, { from : linkFromName } )
      }
      else {
        fsMove( `${options.workingtarget}/${linkToSubPath}`, linkToName ) 
        // fsMove( `${options.workingtarget}/${linkToSubPath}`, linkFromName  )  
      }
    }

    // Source and Target are files or folders. We need another version or a unifed version for strings..
    var processpatterns = function(target, options){
      // Accept a set of patterns and substitutions and operate on a target and apply all patterns substitutions.

      // options = options || { targettype : 'inplace', sourcetype : 'filesystem' }
      // options.source, options.target sourcetype = 'string' | 'filesystem' options.targettype = 'inplace' | 'copy'

      if(options.processingtype === 'inplace' && options.sourcetype === 'filesystem' ) {

        options.patternsubstitutions.forEach( ps => {
          // var replacement = regexreplaceall( from, ps.strOrregexp, ps.substitutes )
          // if(targetname) {  // Porcess all files. Even if file names dont have patterns the content needs to be replaced.
          return options.tasks.map( t => {  return t( target, ps ) } )
          // }

          // return str.replace(regex, function(match, key) {
          //   console.log(`Found match, group ${match}: ${key}`);
          //   return substitutes[key] || match;
          // })
        })
      }

      // while ((m = regex.exec(str)) !== null) {
      //     // This is necessary to avoid infinite loops with zero-width matches
      //     if (m.index === regex.lastIndex) {
      //         regex.lastIndex++;
      //     }
          
      //     var rstr = str;
      //     // The result can be accessed through the `m`-variable.
      //     m.forEach((match, groupIndex) => {
              
      //         // rstr = rstr.replace( groupIndex
      //         console.log(`Found match, group ${groupIndex}: ${match}`);
      //         if(groupIndex === 0) return
              
      //     });

          
      // }

    }

    function copyFileSync( source, target , options) {

        var targetFile = target;

        // If target is a directory, a new file with the same name will be created
        if ( fs.existsSync( target ) ) {
            if ( fs.lstatSync( target ).isDirectory() ) {
                targetFile = path.join( target, path.basename( source ) );
            }
        }

        fs.writeFileSync(targetFile, fs.readFileSync(source));
    }

    function copyFolderRecursiveSync( source, target, options ) {
      var files = [];

      // Check if folder needs to be created or integrated
      var targetFolder = path.join( target, path.basename( source ) );
      if ( !fs.existsSync( targetFolder ) ) {
          fs.mkdirSync( targetFolder );
      }

      // Copy
      if ( fs.lstatSync( source ).isDirectory() ) {
          files = fs.readdirSync( source );
          files.forEach( function ( file ) {
              var curSource = path.join( source, file );
              if ( fs.lstatSync( curSource ).isDirectory() ) {
                  copyFolderRecursiveSync( curSource, targetFolder );
              } else {
                  copyFileSync( curSource, targetFolder );
              }
          } );
      }
    }

    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 getCmdString = function(args){ return `"${args[0]} ${args[1].join(' ')}"` }

    var getshelltask = (args) => { 
      return args[0] === 'rm' ? getgitbashtask(args) : () => { 
        return nodeShellExec.apply(null, args).catch(function(e){ 
          e.benign = args[2].benign; 
          if(!e.benign) { console.error(e); } 
          throw e
        }) 
      } 
    }
    var getgitbashtask = (args, onEachError) => { return () => { 
      return nodeShellExec( `"${gitbash}"`, ['-c', getCmdString(args)], args[2]).catch( onEachError || function(e){ console.error(e) }) } 
    }

    var getnodeshellexectask = (args) => { return () => { return nodeShellExec.apply(null, args) }}
    var perform = function( serailtasks, taskvector ){ return any( serailtasks(taskvector).map(getnodeshellexectask)) }

    var getTaskCheckExists = shell_verse.getTaskCheckExists
    // var getTaskWithElevation = function(tasdef){ return shell_verse.getElevatedTask( tasdef.elevatedpulltasks ) }

    // 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 = (repodef, branch) => {
      // console.log(useGitPull)var getPullCmd = (repo, branch) => {
      // console.log(useGitPull)
      var repo = repodef.repo
      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: ENV
        , runas: processedArgs.runas
        , title: `git pull ${repo}`
      }]
      return pullCmd
    }

    // PB : TODO -- Use queueing with async tasks..
    var performPull = (repodef, branch, repoowner, errHandler, elevatedBatch, regularBatch) => {
      var __inelevatedBatch = elevatedBatch, __inregularBatch = regularBatch;
      var pT = getPullTask(repodef, branch, repoowner, errHandler, elevatedBatch, regularBatch)
      // var waitForBatchAdditions = function(){
      //   return pT;
      // }
      // Execute is implied.
      // if(false && (__inelevatedBatch || __inregularBatch) ) return waitForBatchAdditions()  // PB : Todo Implemnt a trigger which starts execution.
      // else 
      return pT()  // Execute it.
    }

    var getPullTask = (repodef, branch, repoowner, errHandler, elevatedBatch, regularBatch) => {
      // PB : TODO -- Handle no branch passed in case.
      // if(!branch) { throw 'No branch specified' }
      var repo = repodef.repo;
      elevatedBatch = elevatedBatch || [];
      regularBatch = regularBatch || [];
      try{
        // PB : TODO -- local repo folder named the same as the remote repository name is not enough to establish existence.
          // This remote repo and branch may have been or may need to be added as a local tracking branch  
            // to any  other local repo folder (with a different name)  
        var exists = existsSync(instanceroot + '/' + repo)
      }
      catch(e){
        exists = false
        console.log(e)
      }

      function initTask(etask){
        etask.info = { repo }
        etask.errHandler = errHandler
        etask.statuslog = statuslog
        etask.processedArgs = processedArgs
        etask.selectedinstance = selectedinstance
        etask.runtimestamp = runtimestamp
        etask.ENV = ENV
      }

      function initElevatedBatch(){
        elevatedBatch.info = { repo }
        elevatedBatch.errHandler = errHandler
        elevatedBatch.statuslog = statuslog
        elevatedBatch.processedArgs = processedArgs
        elevatedBatch.selectedinstance = selectedinstance
        elevatedBatch.runtimestamp = runtimestamp
        elevatedBatch.ENV = ENV
      }

      if (exists) {
        
        var tasks = [];
        return (()=>{
          // PB : TODO -- We need a non cacheable set of properties that need to default to something but then need to escplicitly specified in each run.
          if(selectedinstance.addremotes) {
            return op['get-remotes']({repo}).then(( remotes )=>{
              return op['get-upstream']({repo, remotes}).then(( upstream ) => {
                return __addremotesandpull({ upstream, remotes})
              })
            })
          }
          else return __pull(); 
        })()

        function __pull(){
          var branchprint =  branch ? ' branch :' + branch  : '';
          var task = ()=>{
            console.log('pulling ' + instanceroot + '/' + repo + branchprint )
            return any(tasks).then( ()=>{
              return nodeShellExec.apply(null, getPullCmd(repodef, branch)).then(() => {
                return true;
              })
            }) 
          }
          initTask(task)
      
          if(repodef.requiresElevation) { 
            elevatedBatch.push(shell_verse.getElevatedTaskInBatch( task ));
            if(elevatedBatch.length === 1) {  initElevatedBatch(); initTask(elevatedBatch[0]) } // PB : TDOO -- Make sure first task also has run context. May need to be moved to win_verse
            else initTask(elevatedBatch[elevatedBatch.length-1])
            return elevatedBatch[elevatedBatch.length-1]
          }
          else {
            regularBatch.push(shell_verse.getNonElevatedTask( task ))
            return regularBatch[regularBatch.length-1]
          }
        }
        
        function __addremotesandpull(options){
          // Add the remotes
          var tasks = []
          
          // selectedinstance.selectedremotes are optional and need not be enforced to be chosen. The selection for hte selected remotes
            // could also be derived from a crossfilter of remote-type selected for this run and the current chosen and operating reposervers.
          var selectedremotes = Array.from( new Set(selectedinstance.selectedremotes.concat(Object.keys(repodef.remotes || {}))));
          if(selectedremotes.length > 0) var selectedremoteFilter = function(rs) { return selectedremotes.find( rs.server ) }
          else var selectedremoteFilter = function(){ return true }
          
          var repoRemotes = Object.assign( {}, selectedinstance.remotes, options.remotes, options.upstream, repodef.remotes );
          
          // We need a most permissive filtered list to use as an efficient starting point to further reduce to whats actually needed. 
          // However if such a cached list is not available we need to build it by scaning and apply all the filters anyway on the whole world. 

          Object.keys(repoRemotes).forEach((remotename)=>{
            // PB : TODO -- ai prefix for all apis that require an answer amongst many choices.
            var ai_RemoteAddNeeded = (r)=>{ 
              if(r.server === reposerver && selectedremoteFilter() && r.accessibility.find( selectedinstance[ 'remote-type' ] )){ // currently chosen remotetype...
                var exists = false;
                if(exists = (options.remotes[r.remotename] || Object.keys(options.remotes).find( lrn => {  
                  var exists = options.remotes[lrn].server === r.server && !options.remotes[r.remotename] 
                  if(exists) console.warn('Found duplicate remote with a different name for the same server...')
                  return exists
                } )) ) {
                  return false // Already a remote not required.
                }
                return true // PB : TODO -- Sort and display highest priority target.remotes.sort(   )
              }
              return false
            }; 
            tasks.push(
              ()=>{     
                return op['remote exists']({
                    remotename, repo, benign : true, ignorefailures : true  
                  , url : repoRemotes[remotename].url + repo
                  , branch : checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV
                }).then( (r) => {
                  if(!r[1]) return false; // PB : TODO -- Not accessible skip for now probably should remove.
                  else if(r[0]) return true; // Already added nothing to do
                  else if(ai_RemoteAddNeeded( repoRemotes[remotename] )) return op['remote add']( { remotename, 
                      'set-upstream' : (selectedinstance['upstream'] || `${remotename}/${branch}`) //   ??? when url accessible... in order of highest priority 
                    , reponame : repo
                    , url : repoRemotes[remotename].url , branch : checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV  
                  })
                  // else skipped as remote is not relevant for this repo... 
                })
              }
            )
          })
      
          __pull()
        }
      }
      else {
        // PB : TODO -- detect if a clonable repo exists within the context of currentGitAuthUser on remote reposerver... 
        console.log('cloning ' + repo)
        // PB : TODO -- add additional remotes after cloning and pull again...

        var task = ()=>{   
          return nodeShellExec('git', ['clone', '-c', 'core.symlinks=true', selectedinstance.reposerver + `/${repodef.owner || repoowner || defaultRepoOwner}/` + repo + '.git'],
            {
              inherit: true, shell: true,
                env: ENV
              , cwd : instanceroot
              , runas: processedArgs.runas
            }).then(() => {

              var task = ()=>{ 
                return nodeShellExec('git', ['config', '--replace-all', 'core.symlinks', true],
                {
                  inherit: true, shell: true,
                  env: ENV
                  , cwd: instanceroot + '/' + repo
                  , runas: processedArgs.runas
                  , title: `'git', ${['config', '--replace-all', 'core.symlinks', selectedinstance.username].join(' ')}`
                })
              }

              initTask(task)

              if(repodef.requiresElevation) { 
                elevatedBatch.push(shell_verse.getElevatedTaskInBatch( task ));
                return elevatedBatch[elevatedBatch.length-1]
              }
              else {
                regularBatch.push(shell_verse.getNonElevatedTask( task ))
                return regularBatch[regularBatch.length-1]
              }
            })
        }
        
        initTask(task)
        if(repodef.requiresElevation) { 
          elevatedBatch.push(shell_verse.getElevatedTaskInBatch( task ));
          return elevatedBatch[elevatedBatch.length-1]
        }
        else {
          regularBatch.push(shell_verse.getNonElevatedTask( task ))
          return regularBatch[regularBatch.length-1]
        }
      }
    }

    var currentGitAuthUser; // nodeShellExec('git', ['config', 'user.email']) ... PB : TODO-- get the current GITEA username 
    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'
    }

    // Maps an environment to a branch. Not required if the branch is appropriately named.
    var checkoutMap = { 'development': 'master' }


    // SAM : TODO Use nodeshellexec where to detect git installation dir
    var gitbash = shell_verse.getbash()
    // var gitbash = "G:\\Installed\\Git\\bin\\sh.exe"
    // Relevant git repos
    var exludeMergeRepos = [];
    var useGitPull = processedArgs.useGitPull || false;
    var configPromise = null

    var reconfirmcmds = { create : true }

    var subcommandlabels = {
      switch : (`switch ${processedArgs._[1] || ''}`).trim()
    }

    var independentcmd = function(){
      return false;
    }

    var util = require('util');
    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 chalk.cyanBright(`
    -------------------------------------------------------------------------------
      *** BBH Elixir ***  
    -------------------------------------------------------------------------------
      elxr ${ver}
        A cli tool for chess
        ${help}
    -------------------------------------------------------------------------------
        `)
      }
      , info() {
        return chalk.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 

        var __args = {
            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) {
            var t1 = function() {
              return performPull(def).then(() => {
                return true;
              }).catch((e) => {
                console.error(e) 
              }).finally(Traq.finally)
            }
            t1.statuslog = statuslog
            t1.selectedinstance = selectedinstance
            t1.processedArgs = processedArgs  
            elevatedpulltasks = shell_verse.getElevatedTask( t1 ) 
          }
          else {
            var t2 = function(){
              return performPull(def).then(() => {
                console.log('pulled ' + JSON.stringify(def.repo))
                return true;
              }).catch((e) => {
                console.error(e) 
              })
              // .finally(Traq.finally)
            }
            t2.statuslog = statuslog
            var regularpulltasks = shell_verse.getNonElevatedTask( t2 ) 
          }
          if(elevatedpulltasks) return elevatedpulltasks //getTaskWithElevation( { elevatedpulltasks, regularpulltasks} )
          else return regularpulltasks // getTaskWithoutElevation({ regularpulltasks}) 
        }
        
        // console.log(`-------------------Processing pull for : ${def.repo} ${def.branch}`)
        console.dir(def)
        console.log('Running exlr pull : ' + path.dirname(__dirname))

        var useGitPull = 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() { 
            var eBatch = []
            def.elevated.map((def) => getPullTask(def, null, null, null, eBatch))  
            if(eBatch.length<1) return Promise.resolve(true);
            eBatch[0].processedArgs = processedArgs
            return shell_verse.runElevatedBatch(eBatch).then(() => {
              return true;
            }).catch((e) => {
              console.error(e) 
            })
          }
          elevatedpulltasks.statuslog = statuslog
        }
        if(def.repos) {
          var regularpulltasks = function(){
            var pendingpulls = [];
            def.repos.forEach((def) => { 
              pendingpulls.push(
                // PB : TODO serializing to prevent out of memory.
                // Need to optimize as batches and streams...
                function(){
                  // if(def.repo === 'setup') return; 
                  // if(def.repo !== 'chess-client-lib') return;
                  
                  return performPull(def).then(()=>{ console.log('pulled ' + JSON.stringify(def.repo)) })
                  .catch(e => { 
                    console.error(util.inspect(e)); throw e }) 
                } 
              ) 
            })
            return any(pendingpulls).finally(Traq.finally)
          }
          regularpulltasks.statuslog = statuslog
        }
        // if(elevatedpulltasks) return getTaskWithElevation( { elevatedpulltasks, regularpulltasks} )
        // else return getTaskWithoutElevation({ regularpulltasks})
        return elevatedpulltasks().then(()=>{
          if(isWin() && isElevated) return Promise.resolve(true);
          return 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  

        // mysqldump --add-drop-table --no-data -u root -p db_name | grep 'DROP TABLE' ) > drop_all_tables.sql
        // mysql -u root -p db_name < drop_all_tables.sql

        var mysql = '../xampp/mysql/bin/mysql'
        var mysqldump = '../xampp/mysql/bin/mysqldump'
    }


    // The main elxr cli process
    function elxrworker() {

      var __runcmd = function (label) {
        var distinquishedlabel = subcommandlabels[label] || label
        return op[distinquishedlabel] ? op[distinquishedlabel](processedArgs) : null;
      }
      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 = (ENV.NODE_ENV && 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 os = require("os");
    var hostname = os.hostname();
    var clustername = null; // PB : TODO -- Prompt to acquire.
    var configs = (function(){
      // We need to discover and use the most specialized config available.
      // Two passes are required as the config currently cloned may be switched by the discovery. 
        // If the repo name is the same but has different remotes the newly acquired config from multiple remotes may 
          // iteself redefine the remotes, repos and servers for the config which we need to honor..
      return {
          ownerClusterNodeConfig(selected) { 
            // Hostname and therefore clusternodename can be anything and can participate in many clusters.
            // Also many cluster node instance can be running as a set of services on the same host on the same port with ( specific domain names )
            var clusternodename = hostname || `CHESS0001${selected.username}`; // Cluster node names need to be unique accross all clusters to avoid collitions.
            clustername = clustername || `${selected.username}-CHESS-${selected.node_env}`; 
            return __acquireConfig(selected, { remote : 'userfork' } // PB : TODO -- accessiblity state should switch to public etc..
              , selected.instanceName + '-config-' + selected.node_env + `-${clusternodename}`
              , function(e){ console.info('Customized node level config not found. This is not an Error. Will attempt with owner level config.');
                  e.benign = true
                  return e; }
            ) 
          }
        , ownerInstnace(selected) { return __acquireConfig(selected, { remote : 'userfork' }
              , selected.instanceName + '-config-' + selected.node_env
              , function(e){ console.info('Customized user level config not found. This is not an Error. Will attempt global common instance config.');
                  e.benign = true
                  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, { repoOwner : defaultRepoOwner }
              , undefined
              , function(e){ 
                // PB : TODO -- console.info('This is probably an error unless the user is asking to create a new instance with this name.') 
                statuslog.statuslog(e, e)
                var manifestpath = path.normalize(selected.root + '/' + selected.instanceName + '-config-' + selected.node_env + '/repo-manifest');
                utils.assign_core( { keycase : true, arraymergetype : utils.assign_core.DISTINCT_UNION }
                  , selectedinstance, require(manifestpath)( {utils}, null, { username : selectedinstance.username, instanceName : selectedinstance.instanceName
                    , node_env : selectedinstance.node_env, reposerver : 'https://git.bbh.org.in' } ))
                console.dir(selectedinstance.repos)
                // 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 && !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 && !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 = __g.selectedinstance = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
                  , 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, selectedinstance.root, selectedinstance)
                // ENV.NODE_ENV = selectedinstance.node_env; 
                throw e
              }
          ) }
        // , genericChessInstance(selected) { return __acquireConfig(selected, { repoOwner : defaultRepoOwner }) }
      }
    })() 

    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 = [ 'ownerClusterNodeConfig', 'ownerInstnace', 'commonInstance' /*, 'genericChessInstance'*/ ]
      return any(configPriority.map(cfg => { return function() { return configs[cfg](slections) } } ), true, true).then(()=>{
        return acquireData(slections)
      })
    }

    var instanceData = (function(){
      return {  
          ownerClusterNodeData(selected) { 
            var clusternodename = hostname || `CHESS0001${selected.username}`; // Cluster node names need to be unique accross all clusters to avoid collitions.
            clustername = clustername || `${selected.username}-CHESS-${selected.node_env}`; 
            return __acquireData(selected, { remote : 'userfork' }
              , selected.instanceName + '-data-' + selected.node_env + `-${clusternodename}`
              , function(e){ console.info('Customized node level data not found. This is not an Error. Will attempt with owner level config.');
                  e.benign = true
                  return e; }
            ) 
          }
        , ownerInstnace(selected) { return __acquireData(selected, { remote : 'userfork' }
              , selected.instanceName + '-data-' + selected.node_env
              , function(e){ console.info('Customized user level data not found. This is not an Error. Will attempt global common instance config.');
                  e.benign = true
                  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, { repoOwner : 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, { repoOwner : defaultRepoOwner }) }
      }
    })() 

    var acquireData = function(slections){
      var configPriority = [ 'ownerClusterNodeData', 'ownerInstnace', 'commonInstance' /*, 'genericChessInstance'*/ ]
      return any(configPriority.map(cfg => { return function() { return instanceData[cfg](slections) } } ), true, true)
    }


    function reinit(){
      sysAddPathVar('%AppData%\\npm')
      resetgitconfig()
    }

    function init(){
      sysAddPathVar('%AppData%\\npm')
      resetgitconfig()
    }


    function resetgitconfig(){

      // https://stackoverflow.com/questions/37182847/how-do-i-disable-git-credential-manager-for-windows
      // use git config --edit --system to remove the helper = manager line so that it is no longer registered as a credential helper.
      // For bonus points, use git config --edit --global and insert:
        // [core]
        //   askpass =
          
      // https://git-scm.com/book/en/v2/Git-Tools-Credential-Storage
      // Git Credential storage...
      // git config --global credential.helper 'store --file ~/.elxrcredentials'
      // git credential fill
        // protocol=https
        // host=git.bbh.org.in
        // username=bob
        // password=pppp
      // git credential-store --file ~/.gitcredentials store

      // // notepad C:/Program Files/Git/etc/gitconfig
      // git config --edit --system
      
      // git credential-store --file ~/git.store store
      
      // Find system git config
      // git config --global --edit
      // git config --list --show-origin
      // git config --list --show-origin --show-scope
      
      
      // https://stackoverflow.com/questions/35942754/how-can-i-save-username-and-password-in-git
      // Recipie
      // git config --global --unset credentials.helper
      // cd /path/to/my/repo
      // git config --unset credential.helper
      // git config credential.helper 'store --file ~/.git_repo_credentials'
      // git config credential.*.username my_user_name
      // git config credential.https://gitlab.com.username my_user_name
      
      // git credential fill
      // git config --global credential.modalprompt false // doesnst work.
      // core askpass = ;;; https://stackoverflow.com/questions/37182847/how-do-i-disable-git-credential-manager-for-windows
      var options = {
        inherit: true, shell: true, env: ENV
        , cwd: instanceroot
        , runas: processedArgs.runas 
      }
      
      var task = ['git', ['config'], options] 

      var tasklist = [
          // ['--global', '--unset credentials.helper']
          // ['--unset', 'credentials.helper'] 
          // , 
          // ['credential.helper', `'store --file git_repo_credentials'`]
          ['--global', 'credential.helper', "'store --file ~/.git_repo_credentials'"]
          , ['--global', '--replace-all', 'user.name', 'pb']
          , ['--global', '--replace-all', 'user.email', 'pradeep@bbh.org.in']

          // , ['--list']
          // , ['credential', 'fill']
      ]
      var onEachError = e => console.error( e.messages.join('\n') + e.result + '\n' + util.inspect(e)  + '\n')
      var shellT = (args) => { return getgitbashtask(args, onEachError) 
        // .catch(e => console.error( e.messages.join('\n') + e.result + '\n' + util.inspect(e)  + '\n' + tasq.toString()) ) 
      }
      execserial(tasklist, task, shellT, onEachError ) 
    }

    var createTasq = (args, shellT, onEachError) => {
      var tasq = shellT ? shellT(args) : (() => { return nodeShellExec.apply(null, args).catch( onEachError || function(e){ console.error(e) } ) })
      tasq.toString = function(){ return JSON.stringify(args)}
      return tasq;
    }

    var execserial = function(tasklist, task, shellT){
      var exec = (taskArgs)=>{ 
        var thistask = task.concat();
        thistask[1] = thistask[1].concat()
        thistask[1].push.apply(thistask[1], taskArgs)
        return createTasq(thistask, shellT)
      }

      return any(tasklist.map(exec))
    }

    var execonce = function(taskArgs, task){ return any([task[1].push.apply(task[1], taskArgs)].map(createTasq)) }


    var __acquireConfig = function (selected, options, configrepo, errHandler) {

      configrepo = configrepo || selected.instanceName + '-config-' + selected.node_env;
      var repoOwner = options.repoOwner || selected.username || options.defaultRepoOwner

      var errorHandler = (e) => {
        if(e.messages.join(' ').match(new RegExp (`fatal: unable to access '${selectedinstance.reposerver}/${repoOwner}/${configrepo}.git/': Failed to connect to .*? port .*? after .*? ms: Timed out`))){
          // console.error('Could not connect to repo server. Timed Out')
          return cli.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 '${selectedinstance.reposerver}/${repoOwner}/${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 = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
              , {
              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 cli.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.normalize(selected.root + '/' + selected.instanceName + '-config-' + selected.node_env + '/repo-manifest');
        utils.assign_core( { keycase : true, arraymergetype : utils.assign_core.DISTINCT_UNION }
          , selectedinstance, require(manifestpath)( {utils}, null, { username : selectedinstance.username, instanceName : selectedinstance.instanceName
            , node_env : selectedinstance.node_env, reposerver : selectedinstance.reposerver }))
        console.dir(selectedinstance.repos)
        // 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 = __g.selectedinstance = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
          , 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, selectedinstance.root)
        ENV.NODE_ENV = selectedinstance.node_env; 
      }

      return performPull( selected.reposindexed[configrepo] || { repo : configrepo }
          , null, repoOwner, errHandler || errorHandler || ((e)=>{ throw e })).then( successHandler )
      .catch( (e)=>{
        // if(e){
          if(Promise.resolve(e) === e) return e;
          // console.error(e)
          e.benign = true;
          throw e; // Not a hard error but we need this for bcontinueonfailure as we still want to stop on firstsuccess.
        // }
      })
    }

    var __acquireData = function (selected, options, datarepo, errHandler) {

      datarepo = datarepo || selected.instanceName + '-data';
      var repoOwner = options.repoOwner || selected.username || options.defaultRepoOwner

      var errorHandler = (e) => {
        if(e.messages.join(' ').match(new RegExp (`fatal: unable to access '${selectedinstance.reposerver}/${repoOwner}/${datarepo}.git/': Failed to connect to .*? port .*? after .*? ms: Timed out`))){
          // console.error('Could not connect to repo server. Timed Out')
          return cli.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 '${selectedinstance.reposerver}/${repoOwner}/${datarepo}.git/' not found`))){
          var choices = { 
            t : `install a temporary local data folder. 
                  For more options. Request and use a personal username at chess@bbh.org.in )`
          , e : 'exit' }

          if(selectedinstance.username !== 'guest' && selectedinstance.username !== 'demo') {
            choices = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
              , {
              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 cli.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( selected.reposindexed[datarepo] || { repo : datarepo }
        , null, repoOwner, errHandler || errorHandler || ((e)=>{ throw e })).then( successHandler )
      .catch( (e)=>{
        // if(e){
          if(Promise.resolve(e) === e) return e;
          // console.error(e)
          e.benign = true;
          throw e; // Not a hard error but we need this for bcontinueonfailure
        // }
      })
    }

    // ----------------------------------------------------------------
    // PB : TODO -- Review and obsolete...
    // ----------------------------------------------------------------
    // var launchpath = path.resolve(path.normalize(ENV.wd))
    var launchpath = selectedinstance.root
    // // we were run.
    // // The easisest would be to ask for a target directory and default to current dir.... 
    // // path.dirname(launchpath).split(path.sep).pop()

    // var parent = path.dirname(launchpath);
    // var pp = launchpath;
    // var instancediscoverytasks = [];
    // while(parent !== pp){
    //   instancediscoverytasks.push(
    //     ((pa)=>{
    //       var p = pa;
    //       return function(){ 
    //         return hasElxr(p).then((value)=>{ 
    //             if(value) return p
    //             // PB : TODO -- Using throw like this is not friendly with any...
    //             throw Object.assign( new Error('Benign Failure in Batch')
    //               , { value : false, benign : true });
    //           }) 
    //       } 
    //     })(pp)
    //   )
    //   pp = parent;
    //   parent = path.dirname(parent);
    // }

    // var instanceroot = null 
    // var detectInstanceRoot = any(instancediscoverytasks, true, true).then( ir => {
    //     if(ir.error) { instanceroot = path.normalize(thisscriptdir) === path.normalize(launchpath) ? path.normalize(thisscriptdir + '/..') : launchpath ; }
    //     else instanceroot = ir.pVal
    //     return instanceroot
    // }).catch(()=>{
    //   instanceroot = path.normalize(thisscriptdir) === path.normalize(launchpath) ? path.normalize(thisscriptdir + '/..') : launchpath ;
    // })
    
    // 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 __interactive_prompts = function( target, choices, promptsfilter ){

      Object.defineProperty(target, 'node_env', { get : function(){ return this.instanceType } });

      var interactionpoints = unbound_interactionpoints.bind({target, choices})(selectedinstance) 
             
      function getPromptKeys() {
        // PB : TODO -- get interactionpoints 
        if(! (processedArgs.label || processedArgs._[0]) ) return Object.assign({}, interactionpoints);
        
        return promptkeys  // PB : TODO __ Convert pormptkeys to filtered interactionpoints.
      }
      var eachPrompt = getBoundEachPrompt( target, getPromptKeys() , interactionpoints, choices, promptsfilter)
      return   Object.keys(promptsfilter || interactionpoints).reduce(eachPrompt, [])
    }


    var downloadsdir = shell_verse.downloadsdir;
    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.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.error(e) 
            return __onResult(e)
          })
        }
      }
      ,
      {
        shellcmd: 'node',
        name : 'node',
        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.resolve(downloadsdir + '/' + 'node-v14.16.0-x64.msi')
          , 'ACCEPT=YES', '/passive']]
        , install : function() { return any([this.installcmd].map(getshelltask)).then(() => { }) }
      }
    ]
    for(var i=0; i<prerequisites.length; i++) {
      prerequisites[prerequisites[i].name] = prerequisites[i];
    }

    prerequisites.forEach(p=>{ prerequisites[p.shellcmd] = p })

    function ensureDirectoryExistence(filePath) { return shell_verse.ensureDirectoryExistence(filePath) }

    var mainTasks = [];
    function verifyAndInstallPrerequisites() {
      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) })
    }

    // function updateselection(selected) { selectedinstance = utils.assign(selectedinstance, selected) }
    var runconfig = null;

    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

    var choices = {
        'instanceName' : []
      , 'reposerver' : []
      , 'upstream-remote' : []
      , 'instanceType' : []
      , username : ['guest', 'chessdemo', 'demo']
    }

    var getInteractionPoints = function(detectedinstanceoptions, possiblePrompts, promptsfilter){

      var instances = []
      var reposervers = [];
      var remotes = [];
      var instanceNames = []
      var instanceTypes = ['development', 'production'];

      // Accumulate all known choices from every possible instance...
      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)
          var otherremotes = instance?.reposerverinstances
          if(otherremotes) otherremotes = otherremotes[instance?.reposerver]?.remotes
          otherremotes = otherremotes || {}
          Array.prototype.push.apply(remotes, Object.keys(otherremotes)) 
        })
      })
      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['upstream-remote'] =  Array.from( new Set(remotes.concat(choices['upstream-remote'])) )
      choices['instanceType'] =  Array.from( new Set(instanceTypes.concat(choices['instanceType'])) )

      return __interactive_prompts(selectedinstance, choices, promptsfilter) 
    }

    var detection_state = {
      localInstanceDetected : false
    }

    function createInstanceData(target, source) {

      var sourceinstance = source || target;
      console.dir(sourceinstance)
      var args = {
          remotebase : sourceinstance.reposerver + '/chess/'
        , sourcerepo : sourceinstance.repo || 'chess-data'
        , targetrepo : `${target.instanceName}-data-${target.instanceType}${target.nodeName ? ('-' + target.nodeName) : ''}`
      }

      if(sourceinstance.local) {

        var options = {
          inherit: true, shell: true,
            env: 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 'createInstanceData 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 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: 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
    }

    var skipprerequisites = false;
    function initinstances() {
      // var root = selectedinstance.root 

      var instanceName = selectedinstance.instanceName
      var node_env = selectedinstance.node_env
      var reposerver = selectedinstance.reposerver

      // var instanceName = selectedinstance.instanceName
      //   || clioverrides.instanceName
      //   // || processedArgs._[1] 
      //   || chessinstances.current_run.instanceName 
        
      // var node_env = selectedinstance.node_env 
      //   || clioverrides.node_env
      //   // || processedArgs.node_env
      //   || chessinstances.current_run.node_env

      // var reposerver = selectedinstance.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 : selectedinstance.root, reposerver : selectedinstance.reposerver /* promptkeys['reposerver'] */ } );
      // chessinstances['current_run'] = { instanceName: selectedinstance.instanceName, node_env : selectedinstance.node_env, reposerver : selectedinstance.reposerver, root }

      // if(path.normalize(selectedinstance.root) !== path.normalize(chessinstances[selectedinstance.instanceName][selectedinstance.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 ' + selectedinstance.root
      // }
      // Override sequence.
      // __default, chessinstances[current_run], instanceName-config-development, cliargs, interactve_promts
      // PB : TODO -- Undefined keys are overriding and deleting values. We should not allow that. 
      // This is ordinary utils.assign behavior. The key should not exist as undefined in the override.
      // PB : TODO -- We now have options that can be passed into assign_core to control this behavior.
      if(selectedinstance.node_env ===  undefined) delete selectedinstance.node_env  
      
      // selectedinstance = __g.selectedinstance = utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }
      //   , __default
      //   , chessinstances[instanceName][node_env]
      //   , clioverrides
      //   , selectedinstance 
      //   // , __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 )
      // }
      
      // Upgrade old formats..
      if(selectedinstance?.repos && !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 && !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, selectedinstance.root)

      // 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 e = { message : 'verifyAndInstall', success : true}
          var inittasks = []
          var commontask = () => { preworkerconfig(); return elxrworker(true) }
          if(!detection_state.localInstanceDetected) {
            var t1 = ()=>{ return createInstance(selectedinstance) };
            t1.statuslog = statuslog
            var specifictask = shell_verse.getNonElevatedTask(t1)
          }
          else {
            var t2 = ()=>{ return acquireConfig(selectedinstance) };
            t2.statuslog = statuslog
            var specifictask = shell_verse.getNonElevatedTask(t2)
          }
          inittasks.push(  specifictask().catch((err) => {
              e = err;
              console.error('Chosen cofiguraton failed or not found. Fix config and rerun or chose another.')
              console.error(err)
            }).then( commontask ) 
          // .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()
      }

    }

    function generateDependencies(){ return shell_verse.generateDependencies() }

    var startElxr = function() {
      const retaincount = 2
      var min = runtimestamp;
      var collect = []

      if(reconfirmcmds[processedArgs.label || processedArgs._[0]]) {
        reconfirm = getReconfirmAll()
      }

      // detectedinstanceoptions.splice(0,0, __default) // PB : TODO -- Merge multiple...
      var detectedinstanceoptions = [selectedinstance]

      var cmdinstance = cmds[clioverrides.cmd]
      var cmdprompts =  cmdinstance.getPossiblePrompts()
      // selectedinstance.node_env ? selectedinstance.node_env : selectedinstance.node_env = clioverrides.node_env
      // PB : TODO -- Most recent should be at the tip ! at index 0 so utils.reverseassign is required !!!
      utils.assign_core( { arraymergetype : utils.assign_core.DISTINCT_UNION }, selectedinstance, promptkeys )
      // promptkeys = utils.assign(promptkeys, clioverrides)

      // startElxr requires instance // Independent cmds should have already been bypassed.
      
      // 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.then( ()=>{
            // PB : TODO -- Embed this in the build instead of inlining it.
            // PB : TODO -- Also attepmt to load from ../chess-config/... as base for new instances...
            
            initinstances(selectedinstance) // PB : TODO Review Initinstancess... and cleanup
            // ---------------------------
            runconfig = { NODE_ENV: selectedinstance.node_env }
            try { runconfig = Object.assign(runconfig, require(instanceroot + '/run.js')) } catch (e) { }
            generateDependencies();
            if(noprerequisites[processedArgs._[0]]
              || skipprereqs[processedArgs._[0]]
            ) {
              return elxrworker()
            }

            var neTask = ()=>{
              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])
                }
                return Promise.resolve(collect);  
              }, `${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
              })
              .catch(e => {
                console.error
              })
            } 
            neTask.statuslog = statuslog
            
            shell_verse.getNonElevatedTask( neTask )()
            
            var commonTask = ()=>{
              verifyAndInstallPrerequisites.statuslog = statuslog
              if((!skipprerequisites || processedArgs.forceprereqs)) mainTasks.push(verifyAndInstallPrerequisites);
              mainTasks.push(maintask)
              return any(mainTasks);
            }
            return commonTask()
            
        })
      // }
      // else return Promise.resolve(true)
    }


    // return detectInstanceRoot.then(()=>{
      var cmdobj = cmds[selectedinstance.cmd]
      return Promise.all((cmdobj.requires || []).map( (r) => utils.promisify(null, r) )  ).then(()=>{
        if(cmdobj.independentcmd) {
          if(cmdobj.requiresElevation) { 
            return cmdobj.cmdFn(cmdobj.toArgs(processedArgs))
          }
          else return cmdobj.cmdFn(cmdobj.toArgs(processedArgs)) 
        }
        else return startElxr()
      })
      .catch(e => {
        if(typeof e === 'symbol') console.log('error : ' + 'symbol')
        else console.log('error : ' + e)
      })
    // })



  })
})
// .then( () => {
//   console.log(process._getActiveHandles());
//   console.log(process._getActiveRequests());
// })


// detect if alread installed -> Take no action.
// download if no installer avalable -> next()
// install 
function checkandinstall(items) {
  var tasks = []
  items.forEach(item => {
    tasks.push(getTaskCheckExists(item.shellcommand || prerequisites[item]))
  })

  return Promise.all(tasks).then(existances => {
    existances.forEach((exists, i) => {
      if (!exists) {
        return downloadandinstall([items[i]])
      }
    })
  })
}

function downloadandinstall(items) {
  var tasks = []
  items.forEach(item => {
    tasks.push(getTaskDownload(item))
  })
  return Promise.all(tasks)
}




// 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...