elxr/index.js

var path = require('path');
var utils = require('bbhverse');
var any = utils.any;
var Tasq = utils.Tasq
var statuslog = utils.Traq
var Traq = utils.Traq
Tasq.addlistener(statuslog.statuslog)
var cli = require('./cliverse')
var nodeShellExec = cli.nodeShellExec;
var chalk = require('chalk')


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

// 'use strict';

// PB : TODO -- make sure folder context is proper coz we can now run elxr from anywhere.

// PB : TODO -- 
// runas bypass non elevated tasks when we request privelege
// runas message is always error needs to be fixed.
// runas wait needs to be parallelized.
// suppress elevation check error messages
// support runas lauched directly from shell.
// pass in environment in hta to shellexecute.

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

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;
const fs = require('fs')

const cliargs = utils.cliargs;
const processedArgs = cliargs(process.argv.slice(2));
console.dir(processedArgs)
// PB : TODO -- defaults for valuless arguments if passed.
// Object.keys(processedArgs).forEach(a=>{
//   if(Object.prototype.toString.call(processedArgs[a]) === '[object Undefined]' || !processedArgs[a]) || trim(processedArgs[a])) == '') {

//   }
// })

// 

// elxr cli operations
var noprerequisites = {
    add : true, 'set-url' : true, 'repo-relocate' : true
  , remote : true, 'c' : true, 'h' : true
  , httpget : true, getuser : true
  , 'switch user' : true
  , 'switch' : true
  // , 'undefined' : true
}

var reconfirmcmds = { create : true }

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

var cmds = {
  remote : {
    // return a interpreted set of arguments for this comd run context.
    interpret() { 
      return { cmd : subcommandlabels['remote'], runchoice : 'c' }  
    }
  }
  , switch : {
    interpret() {
      return { cmd : subcommandlabels['switch'], runchoice : 'c', username : processedArgs._[2]
        , reposerver : __default.reposerver
      }  
    }
    , getPossiblePrompts(){ return { username : true, reposerver : 'http://git.bbh' } } // Requires only one argument...
  }
  , 'switch user' : {
    interpret() {
      return { cmd : subcommandlabels['switch'], runchoice : 'c', username : processedArgs._[2] }  
    }
    , getPossiblePrompts(){ return { username : true } } // Requires only one argument...
  }
}

var interpretrun = function(){

  var cmd = processedArgs._[0];
  var clioverrides = { cmd }   
  processedArgs.node_env ? clioverrides.node_env = processedArgs.node_env 
  : (process.env.NODE_ENV && process.env.NODE_ENV.trim()) 
      ? clioverrides.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) : null;
  
  
  return cmds[cmd] ? cmds[cmd].interpret() : (function(){
    processedArgs._[1] ? clioverrides.instanceName = processedArgs._[1]: null;
    // return clioverrides
    cmds[cmd] = {
      interpret() {
        return Object.assign(clioverrides, { cmd, runchoice : 'c' })
      }
      , getPossiblePrompts(){ return { cmd, username : true, password : true, 
        instanceName : true, instanceType : true, reposerver : true } }
    }
    return cmds[cmd].interpret()
  })() 
}

var clioverrides = interpretrun()
console.dir(clioverrides)

// Object.keys(clioverrides).forEach( prop => { })

var globSync = require('glob').sync;

var ENV = Object.assign({}, process.env); // Shallow clone it.

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

// Directory shallow walk and do perform on each dir.
const dirs = async (perform, path) => {
  for (const dir of await readdir(path || selectedinstance.root, { withFileTypes: true })) {
    if (dir.isDirectory()) perform(dir)
  }
}

var getShellTask = (command, args, options) => {
  options = options || {}
  var callshell = command === 'rm' ? getgitbashtask : getshelltask;
  return () => {
    var p = callshell( [command, args, Object.assign({
        inherit: true, shell: true, env: ENV, title: `${command} ${args}`
      }, options)
    ])()
    if (options.ignorefailures) {
      return p.catch(e => {
        // Ignore. Not a major error.
      })
    }
    else return p;
  }
}

var callshelltask = (args) => { 
  // console.dir(args)
  if( Object.prototype.toString.call(args) === '[object Function]' ) {
    return args;
  }
  return  getshelltask(args)() 
}

var getshelltask = (args) => { 
  return args[0] === 'rm' ? getgitbashtask(args) : () => { return nodeShellExec.apply(null, args) } }
var getgitbashtask = (args) => { return () => { 
  return nodeShellExec( `"${gitbash}"`, ['-c', `"${args[0]} ${args[1].join(' ')}"`], args[2]) } 
}

var getTaskCheckExists = (command, options) => {
  options = options || {}
  return () => {
    var p = nodeShellExec.apply(null, ['where', [command]])
    if (options.ignorefailures) {
      return p.then(() => { return true }).catch(e => { // Ignore. Not a major error.
        return false;
      })
    }
    else return p.then(() => { return true });
  }
}

var getTaskWithElevation = function(tasdef){
  return ()=>{
    if (__isElevated) { 
      return tasdef.elevatedpulltasks().then(()=>{
        // PB : TODO -- Every elevation should have its own messaging file. Async writes from multiple processes are a problem here...
        fs.writeFileSync('run.done', 'success')
      }).catch(e=>{
        fs.writeFileSync('run.done', 'failure')
      });
    }
    else {
      // PB : TODO -- Rename op['runas'] to 'elevate'

      var __runasresult = null;

      return op['runas']().then((r) => { return __runasresult = r; })
        .catch((e) => {
          console.error(e)
        })
        .finally(() => {
          if(__runasresult && !__runasresult.skipped) fs.unlinkSync('run.done')
          if (!processedArgs.runas) {  return tasdef.regularpulltasks(); }
        })
    }
  }
}

var getTaskWithoutElevation = function(tasdef){
  return ()=>{
    if(!processedArgs.runas) {  return tasdef.regularpulltasks(); }
    else Promise.resolve(true)
  }
}

var gitops = {

  getdiscoverbranchcmd : function(repo){

    var parameters = ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;']
    var cmd = [gitbash
      , ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;']
      , { cwd: instanceroot + '/' + repo, title: 'discoverbranch for ' + repo + ' ' + parameters.join(' ') }]
    return cmd
  }
}

var getPullCmd = (repo, branch) => {
  // console.log(useGitPull)var getPullCmd = (repo, branch) => {
  // console.log(useGitPull)

  var pullCmd = []
  if(!branch) {
    // console.warn('No branch was specified detecting from working client.')
    // First check if working client exists.
    // if (existsSync(instanceroot + '/' + repo)) {
      pullCmd= gitops.getdiscoverbranchcmd(repo)
    // }
    // else performpull
  }
  // var pullCmd = [gitInstallDir
  //   , ['-c', 'branch=`git rev-parse --abbrev-ref HEAD`;for i in `git remote`; do git pull $i $branch; done;']
  //   , { cwd: instanceroot + '/' + repo, title: 'pull all remotes for ' + repo }]
  if(branch) {
    var parameters = ['-c', 'for i in `git remote`; do git pull $i ' + branch + '; done;']
    var pullCmd = [ gitbash
      , ['-c', 'for i in `git remote`; do git pull $i ' + branch + '; done;']
      , { cwd: instanceroot + '/' + repo, title : 'pull all remotes for ' + branch + '  ' + repo + ' ' + parameters.join(' ') }]
  }
  // var pullCmd = ['pullall', [], { cwd : repo }]
  if (useGitPull) pullCmd = ['git', ['pull'], {
    inherit: true, shell: true,
    cwd: instanceroot + '/' + repo
    // , env: process.env
    , runas: processedArgs.runas
    , title: `git pull ${repo}`
  }]
  return pullCmd
}

var performPull = (repo, branch, repoowner, errHandler) => {
  // PB : TODO -- Handle no branch passed in case.
  // if(!branch) { throw 'No branch specified' }
  try{
    var exists = existsSync(instanceroot + '/' + repo)
  }
  catch(e){
    exists = false
    console.log(e)
  }


  if (exists) {
    
    var branchprint =  branch ? ' branch :' + branch  : '';
    console.log('pulling ' + instanceroot + '/' + repo + branchprint )
    return nodeShellExec.apply(null, getPullCmd(repo, branch)).then(() => {
            if (__isElevated) {
        fs.writeFileSync('run.log', ', ' + JSON.stringify({ repo, success: true }), { 'flag': 'a+' })
      }
      else statuslog.statuslog(null, repo)
      return true;
    })
    .catch((e) => {
      e.repo = repo;
      if(errHandler) throw errHandler(e)
      if (__isElevated) {
        fs.writeFileSync('run.log', ', ' + JSON.stringify(e), { 'flag': 'a+' })
      }
      else statuslog.statuslog(e); 
      // console.error(e)
      throw e;
    })
  }
  else {
    console.log('cloning ' + repo)
    // PB : TODO -- detect if a clonable repo exists in currentGitAuthUser
    return nodeShellExec('git', ['clone', '-c', 'core.symlinks=true', selectedinstance.reposerver + `/${repoowner || defaultRepoOwner}/` + repo + '.git'],
      {
        inherit: true, shell: true,
          env: process.env
        , cwd : instanceroot 
        , runas: processedArgs.runas
      }).then(() => {

        return nodeShellExec('git', ['config', '--replace-all', 'core.symlinks', true],
          {
            inherit: true, shell: true,
            env: process.env
            , cwd: instanceroot + '/' + repo
            , runas: processedArgs.runas
            , title: `'git', ${['config', '--replace-all', 'core.symlinks', selectedinstance.username].join(' ')}`
          })
          .then(() => {
            if (__isElevated) {
              fs.writeFileSync('run.log', ', ' + JSON.stringify({ repo, success: true }), { 'flag': 'a+' })
            }
            else statuslog.statuslog(null, repo)
          })
          .catch((e) => {
            e.repo = repo;
            if (__isElevated) {
              fs.writeFileSync('run.log', ', ' + JSON.stringify(e), { 'flag': 'a+' })
            }
            else statuslog.statuslog(e);
          })
      })
      .catch(e => {
        e.repo = repo;
        if(errHandler) throw errHandler(e)
        if (__isElevated) {
          fs.writeFileSync('run.log', ', ' + JSON.stringify(e), { 'flag': 'a+' })
        }
        else statuslog.statuslog(e);
        throw e
      })
  }
}

// PB : TODO -- If we are run from an elevated shell it never moves forward and simply exits.
// -- Currently workaround is to always run from a non-elevated shell.
var __isElevated = null; // We assume non-Elevated until someone evaluates and sets this variable.
var acquireElevationState = () => {
  if (__isElevated === null) {
    return nodeShellExec("fsutil", ["dirty", "query", "C:"], {
      inherit: true
      // , shell: true
      , stdio: 'ignore'
      , env: process.env
      , title: `check privileged execution mode using "fsutil dirty query C:"`
    }).then((exitcode) => {
      console.log('Elevated')
      __isElevated = true;
      return true;
    }).catch(() => {
      __isElevated = false;
      console.log('Not Elevated');
      return false;
    });
  }
  else return Promise.resolve(__isElevated);
}


var 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'
}

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


var op = {
    'h': () => { console.log(elxr.help()); return '-h' }
  , 'clean' : () => {
    // delete all node_module folders and links.
    var tasklist = [];
    dirs( (repodir)=> tasklist.push(getShellTask('rm',['-rf', 'node_modules'], { cwd : instanceroot + '/' + repodir.name })()), instanceroot )
    return Promise.all(tasklist)
  }
  // , 'undefined': () => { return acquireChoices( {} ); }
  , 'reset': () => {

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

    const fs = 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: process.env
        }).catch((e) => { console.error(e) })
        p.position = 1;
        console.log('One')
        return p;
      }
      , () => {
        var p = nodeShellExec('npm', ['cache', 'clean', '-f'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e) })

        p.position = 2;
        console.log('Two')
        return p;
      }
      , () => {
        var p = nodeShellExec('npm', ['install', '-g', 'n'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e) })
        p.position = 3;
        console.log('Three')
        return p;
      }
      , () => {
        var p = nodeShellExec('n', ['latest'], {
          inherit: true, shell: true
          , env: process.env
        }).catch((e) => { console.error(e) })
        p.position = 4;
        console.log('Four')
        return p;
      }
    ]
    any(tasks)
    console.log('.......done')
    console.log('Running exlr upgrade in : ' + path.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
        })
      })
    })
  }
  , 'runas': () => {

    if(processedArgs.skipelevated) return Promise.resolve({ skipped : true });

    console.log('Testing Elevation')

    if (__isElevated) {
      try {
        op[processedArgs.label || processedArgs._[0] || 'undefined']()
      }
      catch (e) {
        console.error('Error Invalid command : ' + e)
        fs.writeFileSync('run.done', 'error')
      }
      finally {
      }
    }
    else {
      console.log('Requesting Elevated Privileges');
      // Wait for the runas to complete before we read it.
      try {
        fs.unlinkSync('run.done')
        fs.unlinkSync('run.log')
      }
      catch (e) { } //Ignore 

      // Find node path to send to hta.
      return nodeShellExec('where', ['node']).then(r => {
        var namedArgs = [];
        console.log('result : ' + JSON.stringify(r))
        Object.keys(processedArgs).forEach((v) => { v != '_' ? namedArgs.push('--' + v + '=' + processedArgs[v]) : null; })
        // PB : TODO -- Convert all the cli args back to string.
        var args = [`${selectedinstance.root}/.elxr/run-${runtimestamp}/windowselevate.hta`].concat(processedArgs._).concat(namedArgs.join(' ')); args.push('--runas=self');
        // args.push('--nodepath=' + r.messages[r.messages.length - 1])
        // if (!processedArgs.node_env) args.push('--node_env=' + ENV.NODE_ENV)
        // if (processedArgs.debug) args.push('--debug=true') // Enable to debug elevated..
        console.dir(processedArgs)

        return nodeShellExec('MSHTA', [`"${args.join('" "')}"`]
          , {
            inherit: true
            , shell: true
            , env: ENV
            , runas: 'self'
            , title: `runas`
          }
        ).then(() => {
          // runas returned.
          try {
            // PB : TODO -- Log is comma prefixed. Needs to be proper JSON.
            var runaslog = JSON.parse('[ { "success" : true, "result" : "started"}' + fs.readFileSync('run.log', { flags: 'a+' }) + ']');
            runaslog.forEach((logEntry) => {
              statuslog.statuslog(logEntry.success ? null : logEntry, logEntry)
              logEntry.success ? (console.log(['success :' + logEntry.result]), console.log((logEntry.messages || []).join(' '))) : (console.error(['error :' + logEntry.result]), console.error((logEntry.messages || []).join(' ')))
            })
          }
          catch (e) {
            // We must have a runas log
            statuslog.statuslog(e)
            console.error('Run log error probably was not created by runas : ' + e)
          }
        })
          .catch(err => console.error('Elevation failed : ' + err));
      })

    }
  }
  , 'push': () => {
    if (!processedArgs._[1]) { console.error('push all not supported. Specify repo name'); return }
    // init remote bare from local
    // pushandinitremotebare
    // https://www.jeffgeerling.com/blogs/jeff-geerling/push-your-git-repositories
    // connect to repo server -- net use 172.16.0.27 
    // cd 172.16.0.27/repos/
    // mkdir repo.git
    // cd repo.git
    // git init --bare
    // cd localrepo
    // git remote rename origin githubclone
    // git remote add origin //172.16.0.27/repos/repo.git
    // git push origin master

    var repo = processedArgs._[1];

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

    sequentialTaskShellCommands.push(['git', ['push', 'origin', 'master'], { cwd: `${instanceroot + '/' + repo}` }])
    // console.dir(sequentialTaskShellCommands);

    var tasks = [];
    sequentialTaskShellCommands.forEach(shellcmd => {
      // console.log(shellcmd)
      tasks.push(() => {

        var p = nodeShellExec.apply(null, shellcmd.slice(0, 3)).catch((e) => { if (shellcmd[3]) { return shellcmd[3]() } else { console.error(e); } })
        return p;
      })
    })
    any(tasks);

  }
  , 'is-git-repo': (dir) => {
    return nodeShellExec('git', ['-C', dir.name, 'rev-parse'], { stdio: 'ignore' })
  }
  // git remote equivalents...
  // git branch --set-upstream-to=elixir-unc/master master
  // git push --set-upstream elixir-unc branch..
  , 'remote': (args) => { 
    
    // Subcommands!
    // PB : TODO -- we can now pass in hypehnated args...
    if(!processedArgs.v) return false; // Only -v is supported presently..

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

    var x = (args) => {
      var tasq = () => {
        // console.log(args)
        return nodeShellExec.apply(null, args).catch(e => {
          // We continue on failure.
          console.error(tasq.toString())
        })
      }
      tasq.toString = function(){
        return JSON.stringify(args)
      }
      return tasq;
    }

    var perform = (dir) => {
      return any(serial_perform(dir.name).map(x))
    }

    dirs(perform)
  }

  , 'remote set-url': (args) => {
    // git remote set-url elixir-unc //10.10.5.60/gitrepo/chess/bbhverse
    var __args = {
      remotename : args.remotename || processedArgs._[2]
      , url : args.url || processedArgs._[3]
    }

    // pushable doesn't mean the remote doesn't support being pushed to. 
    // Over here it just means we are disabling pushing to that remote by setting the push portion of the url the a junk remote called no-pushing. 
    // PB : TODO -- change this to enablepushing.
    // By default pushing should be disabled. Also developers permissions on the remote is a secondary check for pushing.
    var pushable = processedArgs.pushable || false;
    remotename = __args.remotename
    url = __args.url
    var serial_perform_git_seturl = (repo) => {
      var options = { cwd: instanceroot + '/' + repo }
      // console.log(repo)
      if (pushable) {
        return [
          ['git', ['remote', 'set-url', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
        ]
      }
      else {
        return [
          ['git', ['remote', 'set-url', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], { cwd: instanceroot + '/' + repo }]
        ]
      }

    }

    var x = (args) => {
      var tasq = () => {
        // console.log(args)
        return nodeShellExec.apply(null, args).catch(e => {
          // We continue on failure.
          console.error(tasq.toString())
        })
      }
      tasq.toString = function(){
        return JSON.stringify(args)
      }
      return tasq;
    }
    var perform_git_seturl = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        return any(serial_perform_git_seturl(dir.name).map(x))
      }).catch((e) => {
        // console.log('Failed : ' + dir.name)
      })
    }

    dirs(perform_git_seturl)
  }
  // , 'reset' : ()=>{ 
    // PB : TODO -- Cant have 2 resets !! | There is an npm reset that should be bundled.
  //   // Reset the whole installation pertaining to this elxr folder.
    
  // }

  , 'remote exists': (args) => {
    var __args = {
        remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]
    }

    var options = args.repo ? { cwd: instanceroot + '/' + args.repo } : {}

    // PB : TODO -- We should evaluate a whole list of remotes passed in from args instead of just one.
    var commands = [
      // git remote -v| while read remote; do "${remote#origin/}" "$remote"; done
        // ['git', ['remote', '-v', '| while read remote; do "${remote#origin/}" "$remote"; done'], utils.assign( { 
        ['git', ['remote', '-v'], utils.assign( { 
          evaluateResult : function(err, result){ 
            // var found = result.messages.find( (r)=> { return r.includes( __args.remotename )  })
            var remotes = []
            var found = false;
            console.dir(result.messages)
            console.log(result + '---------------')
            result.messages.forEach( (line)=> { 
              console.log(line + '$$$$$$$$$$$$$$$$$$$$')
              var matches = line.match(/(.*)?\s\s([^\(]*)?\s?\(?([^\)]*)\)?/);
              if(matches) {
                var remote = {};
                remote[matches[1]] = matches[2];
                if( (!matches[3].trim() ||  matches[3].trim() === 'fetch') && matches[1].trim() === remotename.trim()) {
                  found = true;
                  result.url = remote[remotename];
                }
              }
            })
            console.dir(remotes)
            return [
                  found
                , result
            ]
          } 
        } , options) ]
        , function(prevserialtaskresult) {
            console.log('================================')
            var url = __args || prevserialtaskresult.url;
            console.dir(prevserialtaskresult)
            return getshelltask(['git', ['ls-remote', url], utils.assign( { 
              evaluateResult : function(err, result){
                // fatal: unable to access '${__args.url}/': Failed to connect to git.bbh port 80 after 21025 ms: Timed out
                // `fatal: repository '${__args.url}/' not found`
                var hasfailed = /^fatal: .*/.test(result.messages.join(' '))
                return [
                    !hasfailed, result
                ]
              } 
            } , options) ])() 
        } 
    ]
    var mapped = commands.map(callshelltask)  //.map( p => p.catch(e => e)) // Handle errors later.
    return any(mapped).then( allresolved =>{
      console.dir(allresolved)
      !allresolved[0][0] && !allresolved[1][0] ? console.log('was not added as a remote and url is currently inaccessible.')
        : allresolved[0][0] && allresolved[1][0] ? console.log('was added as a remote and url is accessible.')
        : allresolved[0][0] && !allresolved[1][0] ? console.log('was added as a remote but url is currently inaccessible.')
        : console.log('was not added as a remote but url is currently accessible.')
      
      return !allresolved[0][0] && !allresolved[1][0] ? [0, 0]
        : allresolved[0][0] && allresolved[1][0] ? [1, 1]   // => was added as a remote and url is accessible.
        : allresolved[0][0] && !allresolved[1][0] ? [1, 0]  // => was added as a remote but url is currently inaccessible.
        : [0, 1]  // => was not added and remote and url is accessible.
    })
  }

  , 'remote refresh': (args) => {
    var __args = {
        remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]
    }

    // use the repo manifest to create missing remotes.
    function perform_remote_refresh(dir){
      var repo = dir.name
      var dscoverbranchcmd = gitops.getdiscoverbranchcmd(repo)
      try {
        var remotes = require(`${selectedinstance.root}/${dir.name}/repo-manifest.js`)( null, selectedinstance).remotes || [];
      }
      catch(e){
        var remotes = []
      }
      // console.log(`${dir.name}/repo-manifest.js` + '---------------------------')
      // console.dir(remotes)

      return nodeShellExec.apply(null, dscoverbranchcmd).then(__branch=>{ 
        console.log('Processing : ' + dir.name)
        var branch = __branch
        __args.repo = repo
        __args.branch = __branch
        var promises = []

        remotes.forEach(remote =>{
          Object.keys(remote).forEach(remotename => {
            __args.remotename = remotename
            __args.url = remote[remotename]
            promises.push( op['remote exists']( __args ).then( exists => {
                if(!exists[0]) {
                  if(!exists[1]) { console.error( `Skipping inaccessible remote url ${__args.url}` ) }
                  else return op['remote add']( { remotename, 
                    // PB : TODO -- use the most accessible remote instead of the first available.
                    url : (utils.js.isArray(remote[remotename]) ? remote[remotename][0] : remote[remotename]), branch 
                  } )
                }
              })
            )
          })
        })

        return Promise.all(promises)
      })
      .catch((e) => { console.log('Processing Error : ' + dir.name); console.error(e); return { error: true, message: repo } })
    }
    
    return dirs(perform_remote_refresh)
  }
  , 'remote add': (args) => {
    // PB : TODO -- set-upstream-to should be chosen and intentionally switched. Coz we can have multiple upstream remotes.
      // Also each upstream remote may need to have is own branch to switch to. We therefore need a branch nomenclature
      // That explicitly has a remote name prefix.
      // git branch branch_name --set-upstream-to your_new_remote/branch_name
      // git branch branch_name -u your_new_remote/branch_name -- older versions
      // git branch -vv -- Detect which branch are we tracking.
      // default upstream should be users own fork.
      // Also need alias branches to 
        // define a git alias which would git pull master from one repo, and then git pull master from other remotes.
        // probably git merge from all remotes... and relevant branches...
    // alias pushall='for i in `git remote`; do git push $i; done;'
    // alias pullall='for i in `git remote`; do git pull $i; done;'
    // args === processedArgs ? args = {} : null;
    var __args = {
      remotename : args.remotename|| processedArgs._[2]
      , url : args.url || processedArgs._[3]
      , branch : args.branch || processedArgs._[4]
    }
   
    var remotename = __args.remotename
    var url = __args.url
    var branch = __args.branch

    var pushable = processedArgs.pushable || false;


    var serial_perform_git_add = (repo) => {
      var options = { cwd: instanceroot + '/' + repo }
      // console.log(repo)
      if (pushable) {
        return [
          ['git', ['remote', 'add', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + repo }]
          , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], { cwd: instanceroot + '/' + repo }]
        ]
      }
      else {

        return [
          ['git', ['remote', 'add', remotename, url + '/' + repo], { cwd: instanceroot + '/' + repo }]
          , ['git', ['remote', `set-url`, '--push', remotename, 'no-pushing'], { cwd: instanceroot + '/' + repo }]
          , ['git', ['pull', remotename, branch], { cwd: instanceroot + '/' + repo }]
          , ['git', ['branch', `--set-upstream-to=${remotename}/${branch}`, branch], { cwd: instanceroot + '/' + repo }]
        ]
      }

    }
    var x = (args) => {
      return () => {
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_git_add = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        // console.log(code)
        if (logEntry.success) {
          nodeShellExec('git', ['remote', 'get-url', remotename], { cwd: dir.name, stdio: 'ignore' }).then(() => {
            console.log('skipped : ' + dir.name + ', reason : A remote with same name already exists.')
          })
          .catch((e) => {
            any(serial_perform_git_add(dir.name).map(x))
          })
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e) => {
        console.log('Failed : ' + dir.name)
      })
    }

    const { readdir } = require("fs").promises
    
    dirs(perform_git_add)
  }
  , 'remote remove': (args) => {
    
    var __args = {
      remotename : args.remotename|| processedArgs._[2]
    }
    var remotename = __args.remotename
    var serial_perform_git_remove = (repo) => {
      var options = { cwd: instanceroot + '/' + repo }
      // console.log(repo)
      return [
        ['git', ['remote', 'remove', remotename], { cwd: instanceroot + '/' + repo }]
      ]
    }
    var x = (args) => {
      return () => {
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_git_remove = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        // console.log(code)
        if (logEntry.success) {
          nodeShellExec('git', ['remote', 'get-url', remotename], { cwd: dir.name, stdio: 'ignore' }).then(() => {
            any(serial_perform_git_remove(dir.name).map(x))
          })
            .catch((e) => {
              console.log('skipped : ' + dir.name + `, reason : No remote named ${remotename}`)
            })
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e) => {
        // console.log('Failed : ' + dir.name)
      })
    }

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

    dirs(perform_git_remove)
  }
  , 'init-gitea': (user) => {
    user = user || processedArgs._[1]
    if (!user) throw 'User name required'
    var serial_perform_init_gitea = (repo) => {
      var options = { cwd: instanceroot + '/' + repo }
      // console.log(repo)
      return [
        ['git', ['remote', 'add', 'chess', `${selectedinstance.reposerver}/${user}/${repo}.git`], { cwd: instanceroot + '/' + repo }]
        , ['git', ['remote', 'set-url', '--push', 'chess', 'no-pushing'], { cwd: instanceroot + '/' + repo }]
        , ['git', ['remote', 'set-url', 'origin', `${selectedinstance.reposerver}/${user}/${repo}.git`], { cwd: instanceroot + '/' + repo }]
      ]
    }
    var x = (args) => {
      return () => {
        // console.log(args)
        return nodeShellExec.apply(null, args)
      }
      // return Promise.resolve(true)
    }
    var perform_init_gitea = (dir) => {
      op['is-git-repo'](dir).then((logEntry) => {
        // console.log(code)
        if (logEntry.success) {
          nodeShellExec('git', ['remote', 'get-url', 'chess'], { cwd: dir.name, stdio: 'ignore' }).then(() => {
            console.log('skipped : ' + dir.name + ', reason : Already has remote chess ')
          })
            .catch((e) => {
              any(serial_perform_init_gitea(dir.name).map(x))
            })
        }
        // else console.log('Skipped : Not a Git Repo : ' + dir.name)
      }).catch((e) => {
        // console.log('Failed : ' + dir.name)
      })
    }

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

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

    var env = Object.assign({}, process.env); // Shallow clone it.
    // console.dir(env)
    console.log('Running exlr pull : ' + path.dirname(__dirname))

    if (!processedArgs.runas) gitRepos.map((def) => performPull(def.repo, def.branch || 'master'))
    if (__isElevated) {
      return any(elevatedRunasRepos.map((def) => performPull(def.repo, def.branch || 'master'))).then(() => {
        fs.writeFileSync('run.done', 'success')
      }).catch(() => {
        fs.writeFileSync('run.done', 'error')
      })
    }
    else return op['runas']()
  }

  , 'repo-relocate' : function(args){
    // relocate a subfolder in source repo to same subfolder in target repo with history. 

    var args = args || {
        remotebase : processedArgs._[4] || 'http://git.bbh/chess/'
      , folder : processedArgs._[3] || 'server'
      , sourcerepo : processedArgs._[2] || 'client'
      , targetrepo : processedArgs._[1] || 'elixir-server'
    }
    var sourcerepooptions = { cwd: `${instanceroot}/relocate/${args.sourcerepo}`
      // , stdio: ['pipe', process.stdout, process.stderr]
      , inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    }

    return op['repo-split'](args).then(()=>{
      return op['repo-merge'](args).then(()=>{
        
        // cleanup folder from source.
        var cmdseq = [
            ['rm', ['-rf', `${args.folder}`], sourcerepooptions ]
          // commits have to intentional...
          // , ['git', ['commit', '-a', '-m', `relocate folder ${args.folder} to ${targetrepo}`], sourcerepooptions ]
        ]

        return any(cmdseq.map(getshelltask))
      })
    }).catch(e=>{console.error(e)})
  }

  , 'repo-split' : function(args) {
    
    // https://gist.github.com/smdabdoub/17065c348289158277b5
    
    /**
     * Eg : folder, remotebase, sourcerepo, targetrepo
     *  args.folder = 'server'
     *  args.remotebase = 'https://git.bbh/chess/'
     *  args.sourcerepo = 'client'
     *  args.targetrepo = 'elixir-server'
     */

    var args = args || {
        folder : 'server'
      , remotebase : 'http://git.bbh/chess/'
      , sourcerepo : 'client'
      , targetrepo : 'elixir-server'
    }

    var options = { cwd: `${instanceroot}/relocate`
      // , stdio: ['pipe', process.stdout, process.stderr]
      ,  inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    }
    
    var cmdseq = [
        // create a temporary working dir in current folder where we started execution.
        ['mkdir', [ '-p', `${instanceroot}/relocate`]]
      , ['git', ['clone', `${args.remotebase}${args.sourcerepo}`], options ]
      , ['git', ['clone', `${args.sourcerepo}`, `relocate-${args.sourcerepo}-${args.folder}`], options]
      , ['git', ['clone', `${args.remotebase}${args.targetrepo}`, `relocate-${args.targetrepo}-${args.folder}`], options]
    ]
      
    return any(cmdseq.map(getshelltask)).then(() => { 
      // , ['git', ['subtree', 'split', '-P', `${args.folder}`, '-b', `relocate-${args.sourcerepo}-${args.folder}`], sourcerepooptions] 
        // split doesnt retain folder structure we need to move and commit ourselves through a branch to retain history... 
          // , ['git', [`checkout relocate-${args.sourcerepo}-${args.folder}`], sourcerepooptions] 
          // , ['mkdir', [`${args.folder}`], sourcerepooptions]
          // , ['git', ['mv', `!(${args.folder})`, `${args.folder}`], sourcerepooptions ] // requires  shopt -s extglob
          // , ['git', ['commit', `-m`, 'Moved to same subfolder after subtree split in branch'] , sourcerepooptions]
          
      
      // subtree split and filter-branch are options. We currently use repo-filter. 
      return  op['filter-repo'](args)
    }).catch(e=>{console.error(e); throw 'failed'})
  }

  , 'repo-merge' : function(args) {
    // Merge source repo into target repo
    var args = args || {
        folder : 'server'
      , remotebase : 'http://git.bbh/chess/'
      , sourcerepo : 'client'
      , targetrepo : 'elixir-server'
    }

    var sourcerepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.sourcerepo}-${args.folder}`
      // , stdio: ['pipe', process.stdout, process.stderr]
      , inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    }
    var targetrepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.targetrepo}-${args.folder}` 
      // , stdio: ['pipe', process.stdout, process.stderr]
      , inherit: true,
        shell: true,
        env: process.env
      , runas: processedArgs.runas
    }

    var cmdseq = [
        ['git', ['pull', `../relocate-${args.sourcerepo}-${args.folder}`, `master`, '--allow-unrelated-histories'] 
          , targetrepooptions ]
      // , ['git', ['push', targetrepooptions ] // manual push for now..
    ]
    return any(cmdseq.map(getshelltask)).catch(e=>{console.error(e)})
  }

  , 'filter-repo' : function(args){
      // Merge source repo into target repo
      var args = args || {
          folder : 'server'
        , remotebase : 'http://git.bbh/chess/'
        , targetrepo : 'elixir-server'
      }
  
      var targetrepooptions = { cwd: `${instanceroot}/relocate/relocate-${args.sourcerepo}-${args.folder}` 
        , inherit: true, shell: true
        , env: process.env
        , runas: processedArgs.runas
      }

      var cmdseq = [
        // git checkout -b feature/merge-old-project
              // git remote add src-project ../src-project
        ['git', ['filter-repo', '--path', `${args.folder}`], targetrepooptions ]
      ]
      return any(cmdseq.map(getshelltask)).catch(e=>{console.error(e); throw 'failed' })
  }

  , 'filter-branch' : function(preservefolder, repo){
    // https://stackoverflow.com/questions/359424/detach-move-subdirectory-into-separate-git-repository
    // git subtree split -P <name-of-folder> -b <name-of-new-branch>
    // Preserve a specific folder.
    // PB : TODO -- filter-branch has known issues. Explore subtree and filter-repo...
    /*
    git clone repo reposplit
    git filter-branch --tag-name-filter cat --prune-empty --subdirectory-filter {{folder}} -- --all 
    git remote rm origin
    */

    throw 'filter-repo-history not yet implmented pls refer to manual commands in code.'
  }

  // , 'repo-merge-folder' : function(mergetarget, mergesource, mergefolder){
  //   // Merge repo2 into a subfolder in repo1
  //   // https://alexharv074.github.io/puppet/2017/10/04/merge-a-git-repository-and-its-history-into-a-subdirectory-of-a-second-git-repository.html
  //   // https://thoughts.t37.net/merging-2-different-git-repositories-without-losing-your-history-de7a06bba804
  //   /*
  //     cd repo1
  //     git remote add -f tempmergesource ../{{mergesource}}/.git
  //     git merge -s ours --no-commit tempmergesource/master --allow-unrelated-histories
  //     git read-tree --prefix={{mergefolder}} -u tempmergesource/master:
  //     git commit

  //     // Repair History
  //     // === git filter-branch --tree-filter '(echo === $GIT_COMMIT:; git ls-tree $GIT_COMMIT) >> /tmp/tree.log'
          
  //             #!/usr/bin/env bash

  //                       first=ed4f16becc2f03820c164e0617bb98f12ff49ef0
  //                       last=038e26e21bd60fa265d6637261f3bc918780d2e8
  //                       subdir=server

  //                       git filter-branch --tree-filter '
  //                         first='"$first"'
  //                         last='"$last"'

  //                         subdir='"$subdir"'
  //                         log_file=/tmp/filter.log

  //                         [ "$GIT_COMMIT" = "$first" ] && seen_first=true

  //                         if [ "$seen_first" = "true" ] && [ "$seen_last" != "true" ]; then
  //                           echo "=== $GIT_COMMIT: making changes"
  //                           files=$(git ls-tree --name-only $GIT_COMMIT)
  //                           mkdir -p $subdir
  //                           for i in $files; do
  //                             mv $i $subdir || echo "ERR: mv $i $subdir failed"
  //                           done
  //                         else
  //                           echo "=== $GIT_COMMIT: ignoring"
  //                         fi \
  //                           >> $log_file

  //                         [ "$GIT_COMMIT" = "$last" ] && seen_last=true

  //                         status=0  # tell tree-filter never to fail
  //                       '

  //     git remote rm tempmergesource
  //   */
  //   // better alternative for history
  //   /**
  //    * 
  //     git clone git@server.com:old-project.git
  //     git clone git@server.com:new-project.git
    
  //     cd old-project
  //     mkdir old-project
  //     git mv !(old-project) old-project
  //     ls -la and gt mv hidden files ....
  //     git commit -a -S -m “Moving old project into its own subdirectory”
    
  //     cd ../new-project
  //     git remote add old-project ../old-project
  //     git fetch old-project
  //     git checkout -b feature/merge-old-project
  //     git merge -S --allow-unrelated-histories old-project/master
  //     git push origin feature/merge-old-project
  //     git remote rm old-project
  //   */  

  //   throw 'merge-repos not yet implmented pls refer to manual commands in code.'
  // }

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

    return elxr.getpulltask(selectedinstance)()
  }
  , 'isInstalled': () => {
    return nodeShellExec('where', [processedArgs._[1]], { inherit: true }).then(() => {
      console.log(processedArgs._[1] + ' exists.')
      return true;
    });
  }
  , 'c' : ()=>{

  }
  , 'i' : () => {
    var tasks = []
    // tasks.push(op['pull']);
    tasks.push(getShellTask.apply(null, ['rm', [instanceroot + '/run.js'], { ignorefailures: true }]))
    tasks.push(op['use'])
    if (!__isElevated) {
      tasks.push(op['npmi'])
    }

    // var tasksdefs = [
    //     ['elxr', ['pull']]
    //   , ['elxr', ['use', 'elixir']]
    //   , ['elxr', ['npmi']]
    // ]


    // tasksdefs.forEach(tasksdef=>{
    //   tasks.push( ()=> nodeShellExec.apply(null, tasksdef) )
    // })

    return any(tasks);

  }
  , 'npmi': () => {
    var tasks = [];

    // Build fails without babel...
    tasks.push(getShellTask(
      'npm',[ 'i', '-g', 'babel-cli' ]
    ) )

    var npmbuildrepos = ['loopback-jsonapi-model-serializer']
    // npmbuildrepos = []
    npmbuildrepos.forEach(repo => {
      tasks.push(() => {
        return nodeShellExec('npm', ['i --force'], {
          inherit: true, shell: true
          , cwd: instanceroot + '/' + repo
          , env: process.env
          , title: `npm i for ${repo}`
        }).catch((e) => {
          console.error('Ignoring Benign Error'); console.error(e);
        }).then(() => {
          console.log(`--npm run build for ${repo}--------------------`)
          return nodeShellExec('npm', ['run build'], {
            inherit: true, shell: true
            , cwd: instanceroot + '/' + repo
            , env: process.env
            , title: `npm run build for ${repo}`
          }).then(Tasq.then).catch(Tasq.catch)
        })
      })
    })

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

      gitRepos.push('chess-server-lib/server');
      gitRepos = gitRepos.concat(elevatedRunasRepos);

      // gitRepos = [
      //   // 'bbhverse', 'serververse', 'elixir-server', 
      //   // 'clientverse', 
      //   'client'
      // ];
      var rmtasks = []
      var repotasks = []
      var env = Object.assign({}, process.env)
      delete env.NODE_ENV
      gitRepos.forEach(repodef => {
        rmtasks.push(
          // () => {
            // console.log(`--rm package-lock.json for ${repodef.repo}--------------------`)
            // return nodeShellExec(`"${gitbash}"`, ['-c', '"rm  package-lock.json"'], {
            callshelltask(['rm', ['package-lock.json'], {
              inherit: true, shell: true
              , cwd: instanceroot + '/' + repodef.repo
              , env: process.env
              , title: `rm 'package-lock.json' for ${repodef.repo}`
            }])
            .then(()=>{
              console.log(`--rm package-lock.json for ${repodef.repo}--------------------`)
            }).catch((e) => { console.error(e) })
          // }
        )

        if (npmbuildrepos.indexOf(repodef.repo) < 0) {
          repotasks.push(
            () => {
              console.log(`--npm i for ${repodef.repo}--------------------`)
              var p = nodeShellExec('npm', ['i', '--force'], {
                inherit: true, shell: true
                , cwd: instanceroot + '/' + repodef.repo
                , env
                , title: `npm i for ${repodef.repo}`
              }).then(Tasq.then).catch(Tasq.catch)  
              return p;
            })
        }
      })


      // PB : NOTE -- npm i for client does not complete when NODE_ENV=production 
      // therefore bower doesn't get installed !!! which then fails installing the bower dependenciew !!!
      // We work around this by running npm i for client without any NODE_ENV which probably defualts to development.
      // PB : TODO -- Investigate why NODE_ENF has an impact on npm i !??
      // Second time try also doesnt work.
      // repotasks.push(
      //   () => {
      //     var env = Object.assign({}, process.env)
      //     delete env.NODE_ENV
      //     console.log(`--------------------second time npm i for client--------------------`)
      //     return nodeShellExec(`"${gitbash}"`, ['-c', '"npm i --force"'], {
      //     // return nodeShellExec('npm', ['i --force'], {
      //       inherit: true, shell: true
      //       , cwd: instanceroot + '/' + 'client'
      //       , env
      //       , title: `npm i for client`
      //     }).then(Tasq.then).catch(Tasq.catch)
      //   })

      var bowerRepos = [{ repo : 'client'}]
      bowerRepos.forEach(repodef => {
        repotasks.push(() => {
          console.log(instanceroot + '/' + repodef.repo + '/node_modules/bower/bin/bower')
          // var p = nodeShellExec('node_modules/bower/bin/bower', ['install'], {
          var p = nodeShellExec(`"${gitbash}"`, ['-c', '"node_modules/bower/bin/bower i"'], {

            inherit: true, shell: true
            , cwd: instanceroot + '/' + repodef.repo
            , env: process.env
            , title: `bower i for ${repodef.repo}`
          }).then(Tasq.then).catch(Tasq.catch)
          return p;
        })
      })
      // console.log('rmtasks.length : ' + rmtasks.length)
      return Promise.all(rmtasks).then(() => any(repotasks));
    }).catch(e => {
      console.error(e)
    }).finally(statuslog.finally)

  }
  , 'start': (label) => {
    console.log('Starting Elixir Server.');
    var env = Object.assign({}, process.env); // Shallow clone it.
    // console.dir(env)
    env.NODE_ENV = process.env.NODE_ENV || 'development';
    env.DEBUG = 'loopback:connector:' + dbForLabel(label)
    var cmd = env.NODE_ENV === 'development' ? 'nodemon' : 'node';
    // cmd = 'node'
    cmd = [cmd, ['--inspect=9228', 'elixir/server.js']]
    var childPromise = nodeShellExec(...cmd, {
      // inherit : true,
      shell: true,
      detached: true,
      stdio: 'ignore',
      cwd: instanceroot + '/' + 'elixir-server'
      , env: env
    })

    var child = childPromise.process;
    if (typeof child.pid !== 'undefined') {
      console.log(`started Elixir Server PID(${child.pid}) : NODE_ENV=${process.NODE_ENV} ${cmd}`);
      fs.writeFileSync('.elixir-server.elixir.server.pid', child.pid, {
        encoding: 'utf8'
      })
    }

    // nodeShellExec('node', ['--inspect=9226', ' bin/www'], {
    //   inherit : true, 
    //   shell: true, detached: true,
    //   cwd : 'qms/server',
    //   env: env,
    //   shell : true
    // })

    // nodeShellExec('ember', ['s'], {
    //   // inherit : true, 
    //   shell: true, detached: true,
    //   cwd : 'client/',
    //   env: env
    // })
    console.log('Starting Elixir Client Host.');
    var cmd = ['ember', ['s']]
    var childPromise = nodeShellExec(...cmd, {
      // var childPromise = nodeShellExec('node', ['--inspect=9227', './node_modules/.bin/ember', 's'], {
      // PB : TODO -- ember debugging.
      // inherit : true,
      shell: true,
      detached: true,
      stdio: 'ignore',
      cwd: instanceroot + '/' + 'client'
      , env: env
    })
    // .catch(e=>console.error(e))

    child = childPromise.process;
    if (typeof child.pid !== 'undefined') {
      console.log(`started Elixir Client Host PID(${child.pid}) : NODE_ENV=${process.NODE_ENV} ${cmd}`);
      fs.writeFileSync('.client.server.pid', child.pid, {
        encoding: 'utf8'
      })
    }

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

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

    serverPid = fs.readFileSync('.client.server.pid', {
      encoding: 'utf8'
    })
    fs.unlinkSync('.client.server.pid')
    console.log(serverPid)
    kill(serverPid)
  }
  , 'model' : () => {
    if (__isElevated) { 
      var tasks = [
        () => {
          var p = nodeShellExec('mklink', [ `${processedArgs._[2]}.json`
              , `..\\..\\node_modules\\chess-server-lib\\common\\models\\${processedArgs._[2]}.json`], {
            inherit: true, shell: true
            , cwd : instanceroot + `/${selectedinstance.instanceName}-server/${selectedinstance.instanceName}/models`
            , title: `mklink  ${processedArgs._[2]}.json ..\\..\\node_modules\\chess-server-lib\\common\\models\\${processedArgs._[2]}.json`
            , env: process.env
          }).catch((e) => { console.error(e) })
          return p;
        }
      ];
      return any(tasks).then(() => {
        fs.writeFileSync('run.done', 'success')
      }).catch(() => {
        fs.writeFileSync('run.done', 'error')
      })
    }
    else return op['runas']()
  }
  , 'use' : () => {
    // use a certain named instance.
    //  Eg : 
    // 1) elxr use elixir
    // 2) elxr use cihsr
    // If environment is not specified defaults to development.
    // 1) NODE=test elxr use elixir

    /*// Steps
    1) Delete Config and Data symlinks
    2) Make Links for config ({{name}}-config-{{node_env}}) and data with the NODE_ENV specified or default to dev 
    3) Iterates all repos and pull all. 'git', ['pull', '--all'].
    4) Iterates all repos and checkout to the ENV specified. 'git', ['checkout', checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV]
    5) Iterates all repos and merge from source configured in mergesource. 'git', ['merge', mergesource],
    */
    var runconfig = { NODE_ENV: selectedinstance.node_env }
    try { runconfig = Object.assign(runconfig, require(instanceroot + '/run.js')) } catch (e) { }
    // We no longer need to check ruans.. ??? if we were initiated from self invoked privileged shell ?
    if (( /*processedArgs.runas && processedArgs.runas !== 'self' &&*/ !processedArgs.force) &&
      runconfig.NODE_ENV && runconfig.NODE_ENV === (selectedinstance.node_env || runconfig.NODE_ENV) &&
      selectedinstance.instanceName && runconfig.use === selectedinstance.instanceName) {

      console.log(`No change detected. Already using requested specs : ${runconfig.NODE_ENV} ${runconfig.use}`)
      if (processedArgs.runas) { fs.writeFileSync('run.done', 'success') }
      if (existsSync('config') && existsSync('data')){
        return
      }
    }

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

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

    var branch = checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV
    
    var performPullOrCloneForBranch = (def)=>{
      var promise = Promise.resolve(true)
      if (!branch) {
        var dscoverbranchcmd = gitops.getdiscoverbranchcmd(repo)
        
        promise = nodeShellExec.apply(null, dscoverbranchcmd).then(__branch=>{ branch = __branch})
          .catch((e) => { console.error(e); return { error: true, message: repo } })
  
      }
        
      return promise = promise.then(()=>{ return elxr.getpulltask(def)() }).catch(e => { console.error( 'performPullOrCloneForBranch : Failed ' + e )})
    }

    var performCloneAndCheckout = null;
    // cant use git checkout -b it fails when branch already exists.
    var performCheckout = performCloneAndCheckout = (def) => {if (excludeCheckouts[def.repo]) return Promise.resolve({ 'skipped': true })
      
      return performPullOrCloneForBranch(def).then(()=>{
        nodeShellExec('git', ['checkout', def.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV], {
          // return nodeShellExec('git', ['switch', '-m', '-C', checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV], {
          // inherit : true, shell: true, 
          cwd: instanceroot + '/' + def.repo
          // , stdio : ignore // Use when we want to silence output completely.
          , runas: processedArgs.runas
          , title: `git checkout ${def.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} for ${def.repo}`
        }).then(()=>{ console.log( `SUCCESS : git checkout ${def.branch || checkoutMap[runconfig.NODE_ENV] || runconfig.NODE_ENV} for ${def.repo}` ) }).catch((e) => { console.error(e); return { error: true, message: def.repo } })
      })
    }

    // var 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 pr = Promise.resolve(true)
      if (!__isElevated)  {
        pr = op['runas']()
        return pr.then(()=>{

          //target is the env is we specify in elxr use command. Default is dev
            //Switch to target branch
          return any(gitRepos.map((repodef) => { return performCheckout({ repo : repodef.repo, branch}).catch(e=>{ console.log(e); }) }   ))
          // pull or clone target branch
          .then(() => {
            if(!mergesource || branch === mergesource) return Promise.resolve(true)
            return any(gitRepos.map((repo) => performPullAll(repo))) 
          })
          // switch to source branch
          .then( () => {
              if(!mergesource || branch === mergesource ) return Promise.resolve(true)  // Dont do anything if there is no source to merge from.
              return any(gitRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch: mergesource}))) 
          })
          //Pull on merge source branch
          .then( () => {
              if(!mergesource || branch === mergesource ) return Promise.resolve(true)
              return any(gitRepos.map((repo) => performPullAll(repo)))
            })
          //Switch to target branch
          .then( () => { 
            if(!mergesource || branch === mergesource ) return Promise.resolve(true)
            return any(gitRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch}))) 
          })
          .then( //Merge source branch to target branch
            () => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(gitRepos.map((repo) => performMerge( repo ))).catch(err => { console.error('error in performMerge ' + err) })
            })
        })
      }
      else {
        tasks = [
          () => {
            // Use junctions to avoid npm package issues
            var p = nodeShellExec('mklink', ['/J', 'config', runconfig.use + '-config' + '-' + process.env.NODE_ENV], {
              inherit: true, shell: true
              , cwd : instanceroot
              , env: process.env
            }).catch((e) => { console.error(e) })
            return p;
          }
        ];
        if (processedArgs._[1]) {
          tasks = tasks.concat(
            [
              () => {
                var p = nodeShellExec('mklink', ['/J', 'data', runconfig.use + '-data'], {
                  inherit: true, shell: true
                  , cwd : instanceroot
                  , env: process.env
                }).catch((e) => { console.error(e) })
                return p;
              }
            ]
          )
        }
  
        return any(tasks).then(()=>{
              // checkout target branch
          return any(elevatedRunasRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch, requiresElevation : true}))) 
            // pull or clone target branch
            .then(() => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(elevatedRunasRepos.map((repo) => performPullAll(repo))) 
            })
            // switch to source branch
            .then( () => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(elevatedRunasRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch: mergesource, requiresElevation : true}))) 
            })
            //Pull on merge source branch
            .then( () => {
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
                return any(elevatedRunasRepos.map((repodef) => performPullAll({repo : repodef.repo, requiresElevation : true })))
              })
            //Switch to target branch
            .then( () => { 
              if(!mergesource || branch === mergesource) return Promise.resolve(true)
              return any(elevatedRunasRepos.map((repodef) => performCheckout({ repo : repodef.repo, branch, requiresElevation : true}))) 
            })
            .then( //Merge source branch to target branch
              () => {
                if(!mergesource || branch === mergesource) return Promise.resolve(true)
                return any(elevatedRunasRepos.map((repodef) => performMerge({ repo : repodef.repo, requiresElevation : true }))).catch(err => { console.error('error in performMerge ' + err) })
            })
            .then(() => {
              fs.writeFileSync('run.done', 'success')
            }).catch(() => {
              fs.writeFileSync('run.done', 'error')
            })
        })
      }

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

    // Antibiotic stewardship program.
    // 1st use is fine.
    // Max vials dispense
    // 2nd use Pharmacy needs justification Form.
    // Approval after a certain period of time.
  }
  , 'g': () => {
    if (processedArgs.h) {

      console.log('elxr g [modelname] => generate a model named [modelname]');
      console.log('elxr g => regenerate all known models');
      return
    }
    // var child = nodeShellExec('mkdir', ['-p', label], { inherit : true} );
    // console.log('Starting directory: ' + process.cwd());
    // try {
    //     child = child.on('close', () => { process.chdir(label) } );
    //     console.log('New directory: ' + process.cwd()); 
    // }
    // catch (err) {
    //     console.log('chdir: ' + err);
    // }
    // child.on('close', function(){
    // var options = {
    //       shell : true 
    //     , inherit : true
    //     // , cwd : '' + process.cwd
    //     // , env : process.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: process.env
            }).then(() => {
              console.log('Blueprint generation complete for : ' + processedArgs._[2])
              return true;
            }).catch((e) => { console.error(e) })
            return p;
          },
          () => {
            var chromePrefsFile = "C:\\chess\\instances\\elixir_01\\data\\Google\\Chrome\\User Data\\chess\\Preferences";
            var chromeprefs = fs.readFileSync(chromePrefsFile, { encoding: 'utf8' })
            chromeprefs = JSON.parse(chromeprefs)
            var previous = chromeprefs.download.default_directory;
            var parentDir = path.dirname(__dirname);
            chromeprefs.download.default_directory = parentDir + "\\client\\app\\templates\\components\\resource";
            fs.writeFileSync(chromePrefsFile, JSON.stringify(chromeprefs))
            // PB : TODO -- detect where chrome is installed.
            // PB : TODO -- set the download dir to the place where files are needed.
            var p = nodeShellExec('"C:/Program Files (x86)/Google/Chrome/Application/chrome.exe"', [
              '--user-data-dir="C:\\chess\\instances\\elixir_01\\data\\Google\\Chrome\\User Data"'
              , '--profile-directory="chess"'
              , 'http://localhost:4200/admin/crud/create/' + processedArgs._[2]], {
              inherit: true, shell: true
              , env: process.env
            }).then(() => {
              chromeprefs.download.default_directory = previous;
              fs.writeFileSync(chromePrefsFile, JSON.stringify(chromeprefs))
              return true;
            }).catch((e) => { console.error(e) })
            return p;
          }
          ,
          () => {
            console.log('Browser process should have closed here....')
            return true;
          }
        ]
        any(tasks)

      }

    }

    g[processedArgs._[1]]();
  }

  , 'create' : () => { 
    return createInstance(selectedinstance) }

  , 'httpget' : () => {
    // RESTAPI.get({
    //   hostname: 'git.bbh',
    //   // port: 443,
    //   protocol : 'http:',
    //   path: '/',
    //   method: 'GET'
    // }, function(data){ console.log(data)}, function(error){ console.log(error)} )
    return createInstance(selectedinstance)
  }

  , 'getuser' : ()=>{
    return prerequisites.git.getuser().then(u=>{ console.log(u)})
  }

  , 'switch user' : (tousername)=>{
    return GIT['switch user'](tousername)
  }
}

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) {
        elevatedpulltasks = function() {
          return performPull(def.repo).then(() => {
            return true;
          }).catch((e) => {
            console.error(e) 
          })
        }
        return 
      }
      else {
        var regularpulltasks = function(){
          var pendingpulls = [];
          pendingpulls.push(performPull(def.repo))
          return Promise.all(pendingpulls).finally(Traq.finally)
        }
      }
      if(elevatedpulltasks) return getTaskWithElevation( { elevatedpulltasks, regularpulltasks} )
      else return getTaskWithoutElevation({ regularpulltasks}) 
    }
    
    // console.log(`-------------------Processing pull for : ${def.repo} ${def.branch}`)
    console.dir(def)

    var env = Object.assign({}, process.env); // Shallow clone it.
    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() {
        return any(def.elevated.map((def) => performPull(def.repo))).then(() => {
          return true;
        }).catch((e) => {
          console.error(e) 
        })
      }
    }
    if(def.repos) {
      var regularpulltasks = function(){
        var pendingpulls = [];
        def.repos.forEach((def) => { pendingpulls.push(performPull(def.repo)) })
        return Promise.all(pendingpulls).finally(Traq.finally)
      }
    }
    if(elevatedpulltasks) return getTaskWithElevation( { elevatedpulltasks, regularpulltasks} )
    else return getTaskWithoutElevation({ regularpulltasks})
  }
}

function preworkerconfig(){
    // Everything runs after this check is completed. Elevation occurs out of process when needed.
    gitRepos = selectedinstance.repos
    // gitRepos = ['chess-server-lib'];
  
    // Repositiories that have symlinks that require elevated priviletes in windows to create symlinks
    elevatedRunasRepos = selectedinstance.elevated
    // Repos that should excluded from merge for releases...
    exludeMergeRepos = selectedinstance.exludeMergeRepos  

    // 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;
  }


  // --runas
  if (processedArgs.runas) {
    // Weve been asked to run in priviledged mode. Check if we already are privileged.
    return __runcmd('runas')
  }
  else return __runcmd(processedArgs.label || processedArgs._[0] || 'undefined');
}

// function acquireChoices(selectedinstance) {

//   var hasconfig = false;
//   console.warn(chalk.cyan(`
// -------------------------------------------------------------------------------
// Could not locate your preferred configuration (you may not specified it)
// You should fork the default chess configuration to customize and make it 
// your own instance with a named config as 
//   {{yourowninstancename}}-config-{{yourchosenenvironment}} 
// And then run this tool as follows
//   NODE_ENV={{yourchosenenvironment}} elxr i {{yourowninstancename}} 
// OR
// Run this tool with the following command to use a quick start default.
//   elxr --default
// OR
// Choose one of the options below to run interactively.

// We will run your choice at the next prompt.
// -------------------------------------------------------------------------------
//   `))

//   var choices = getInteractionPoints(detectedinstanceoptions, __interactive_prompts) 
//   var todo = any( __interactive_prompts(selectedinstance, choices)  ).then(()=>{ 
//     return initinstances(selectedinstance)
//   })

//   // var prompt = cli.prompter;
//   // return prompt.ask(`Choose an option :
//   //     d) Install the default chess instance. 
//   //         => elxr i chess node_env=development --default
//   //     n) Create your custom new instance interactively
//   //         => elxr i {{instanceName}} node_env={{environment}}
//   //     i) Choose an instance and environment to install
//   //         => elxr i {{instanceName}} node_env={{environment}}
//   //     c) Choose a command to run ( pull, use, i, npmi ... ) <= pull
//   //         => elxr {{cmd}} {{instanceName}} node_env={{environment}}
//   //     h) Help
//   //     q) Quit
//   //       Default <= d
//   //   : `).then((choice) => {
//   //   if (choice && choice === 'd' || !choice) {
//   //     processedArgs._[0] = 'i'
//   //     selectedinstance.instanceName = processedArgs._[1] = processedArgs._[1] || 'chess'
//   //     selectedinstance.node_env = processedArgs.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) || processedArgs.node_env || 'development'
//   //     selectedinstance.reposerver = 'https://git.bbh.org.in'
//   //   }
//   //   else if (choice === 'h') {
//   //     processedArgs._[0] = 'h'
//   //     fs.writeFileSync('run.done', 'noop help');
//   //     console.log(elxr.help()); process.exit()
//   //   }
//   //   else if (choice === 'n' || choice === 'i') {
//   //     var p1 = cli.prompter;
//   //     return p1.ask(`Enter Instance Name ( <= ${selectedinstance.instanceName} ) : `).then(function (instanceName) {
//   //       processedArgs._[0] = 'i'
//   //       selectedinstance.instanceName = processedArgs._[1] = instanceName || selectedinstance.instanceName;
//   //       return p1.ask(`Enter Environment ( <= ${selectedinstance.node_env} ) : `).then(function (node_env) {
//   //         selectedinstance.node_env = processedArgs.node_env = node_env || selectedinstance.node_env
//   //         if (choice === 'n') {
//   //           selectedinstance.reposerver = 'https://git.bbh.org.in'
//   //           console.warn(
//   //             chalk.magenta('No Option Available. Your account may not have privileges. You can request here http://git.bbh.org.in/chess'))
//   //           process.exit();
//   //         }

//   //         return p1.ask(`Enter preferred repo server ( <= ${selectedinstance.reposerver || selectedinstance.reposervers[0]} ) : `).then(function (reposerver) {
//   //           selectedinstance.reposerver = reposerver || selectedinstance.reposervers[0] || 'https://git.bbh.org.in'
//   //         })
//   //       })
//   //     })
//   //   } else if (choice === 'c') {
//   //     var p1 = cli.prompter;
//   //     return p1.ask(`Enter Instance Name ( <= ${selectedinstance.instanceName} ) : `).then(function (instanceName) {
//   //       selectedinstance.instanceName = processedArgs._[1] = instanceName || selectedinstance.instanceName
//   //       return p1.ask(`Enter Environment ( <= ${selectedinstance.node_env} ) : `).then(function (node_env) {
//   //         selectedinstance.node_env = processedArgs.node_env = node_env || selectedinstance.node_env
//   //         return p1.ask(`Enter cmd : 
//   //     p) pull
//   //       Default <= p
//   //     : `).then(function (cmd) {
//   //           if (!cmd || cmd === 'p') {
//   //             processedArgs._[0] = 'pull'
//   //           }
//   //           else processedArgs._[0] = cmd
//   //           return p1.ask(`Enter preferred repo server ( <= ${selectedinstance.reposerver || selectedinstance.reposervers[0]} ) : `).then(function (reposerver) {
//   //             selectedinstance.reposerver = reposerver || selectedinstance.reposerver || selectedinstance.reposervers[0] || 'https://git.bbh.org.in'
//   //           })
//   //         })
//   //       })
//   //     })
//   //   } else {
//   //     console.log(chalk.gray(`Default option not exercised. Please follow manual instructions to customize your instance here http://git.bbh.org.in/chess and try again.`));
//   //     fs.writeFileSync('run.log', ', ' + JSON.stringify({ success: 'quit without execution' }), { 'flag': 'a+' })
//   //     fs.writeFileSync('run.done', 'noop quit');
//   //     process.exit()
//   //   }
//   // })
// }

var mergeObjByKey = function(arrOfObjs, keyName) {

  var keyedDistinct = {}
  var distinctArrOfObjs = [] 

  arrOfObjs.forEach( o => {
    if(o) (keyedDistinct[o[keyName]] || (keyedDistinct[o[keyName]] = []) ).push(o) 
  })
  Object.keys(keyedDistinct).forEach(key => {
    distinctArrOfObjs.push(  utils.assign( ...keyedDistinct[key] ) ) // PB : TODO -- Shallow use utils.assign
  })

  return distinctArrOfObjs;
}

var cacheWriteInstanceConfig = function(chessinstances){
  var instanceName = chessinstances['current_run'].instanceName;
  var node_env = chessinstances['current_run'].node_env;
  chessinstances[instanceName][node_env].repos = mergeObjByKey(chessinstances[instanceName][node_env].repos, 'repo') ;
  chessinstances[instanceName][node_env].elevated = mergeObjByKey(chessinstances[instanceName][node_env].elevated, 'repo') ;
  fs.writeFileSync(instanceroot + '/chessinstances.js', 'module.exports = ' + JSON.stringify(chessinstances, null, 2) + '', { 'flag': 'w' })
}

var configs = (function(){
  return {  
      clusterNodeInstance(selected) { var clusternodename = 'node01' 
        return __acquireConfig(selected, selected.username, clusternodename
          , selected.instanceName + '-config-' + selected.node_env + `-${clusternodename}`
          , function(e){ console.info('Customized node level config not found. This is not an Error. Will attempt with owner level config.');
              return e; }
        ) 
      }
    , ownerInstnace(selected) { return __acquireConfig(selected, selected.username, null, null
          , function(e){ console.info('Customized user level config not found. This is not an Error. Will attempt global common instance config.');
              return e }
        ) 
      }
    // PB : TODO -- Use the ORG level instance before falling back to common Instance coz common instance may not exist for certain orgs.
    , commonInstance(selected) { return __acquireConfig(selected, defaultRepoOwner
          // , function(e){ console.info('This is probably an error unless the user is asking to create a new instance with this name.') }
      ) }
    , genericChessInstance(selected) { return __acquireConfig(selected) }
  }
})() 

var eNotImplemented = function(){
  console.error('Not yet implemented')
  process.exit()
}

// PB : TODO -- accept additional arg - an array specifying custom configPriority.
var acquireConfig = function(slections){
  var configPriority = [ 'clusterNodeInstance', 'ownerInstnace', 'commonInstance' /*, 'genericChessInstance'*/ ]
  return any(configPriority.map(cfg => { return function() { return configs[cfg](slections) } } ), true, true).then(()=>{
    return acquireData(slections)
  })
}

var instanceData = (function(){
  return {  
      clusterNodeInstance(selected) { var clusternodename = 'node01' 
        return __acquireData(selected, selected.username, clusternodename
          , selected.instanceName + '-config-' + selected.node_env + `-${clusternodename}`
          , function(e){ console.info('Customized node level config not found. This is not an Error. Will attempt with owner level config.');
              return e; }
        ) 
      }
    , ownerInstnace(selected) { return __acquireData(selected, selected.username, null, null
          , function(e){ console.info('Customized user level config not found. This is not an Error. Will attempt global common instance config.');
              return e }
        ) 
      }
    // PB : TODO -- Use the ORG level instance before falling back to common Instance coz common instance may not exist for certain orgs.
    , commonInstance(selected) { return __acquireData(selected, defaultRepoOwner
          // , function(e){ console.info('This is probably an error unless the user is asking to create a new instance with this name.') }
      ) }
    , genericChessInstance(selected) { return __acquireData(selected) }
  }
})() 

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

var __acquireConfig = function (selected, owner, clusternodename, configrepo, errHandler) {

  configrepo = configrepo || selected.instanceName + '-config-' + selected.node_env;

  var errorHandler = (e) => {
    if(e.messages.join(' ').match(new RegExp (`fatal: unable to access '${selectedinstance.reposerver}/${owner}/${configrepo}.git/': Failed to connect to .*? port .*? after .*? ms: Timed out`))){
      // console.error('Could not connect to repo server. Timed Out')
      return 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 '${selectedinstance.reposerver}/${owner}/${configrepo}.git/' not found`))){
      var choices = { 
        t : `install a new temporary local instance with this name ( will not persist ). 
                Use your own username for additional options. You can request for a username at chess@bbh.org.in )`
      , e : 'exit' }

      if(selectedinstance.username !== 'guest' && selectedinstance.username !== 'demo') {
        choices = utils.assign({
          i : 'create a new instance with this name => will fork the default config under your username'
        , f : 'fork a new instance with this name for yourself for this node from another instance'
        , o : 'fork a new instance with this name for your organization from another instance' // prompt organization name...
        , c : 'create a custom config for yourself for this node' // prompt hostname as nodename
        , p : 'create a custom config for yourself '
          }, choices)
      }

      return 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');
    selectedinstance = require(manifestpath)( null, selectedinstance)
    // Config from server always override merges into selection except for the current selection.
    // PB : TODO -- utils.assign Array merges are non-distinct...
    if(!selectedinstance.repos[0].repo) {
      console.warn('repo manifest has obsolete format. Attempting upgrade.')
      selectedinstance.repos = selectedinstance.repos.map(function(repo){ return { repo } })
    }
    if(selectedinstance.elevated[0] && !selectedinstance.elevated[0].repo) {
      console.warn('elevated repo manifest has obsolete format. Attempting upgrade.')
      selectedinstance.elevated = selectedinstance.elevated.map(function(repo){ return { repo } })
    }
    chessinstances[selected.instanceName][selected.node_env] = selectedinstance = utils.assign(selected, selectedinstance)
    chessinstances[selected.instanceName][selected.node_env].reposervers = Array.from(new Set(chessinstances[selected.instanceName][selected.node_env].reposervers))
    selectedinstance.reposerver = selectedinstance.reposerver || selectedinstance.reposervers[0] // PB : TODO -- Attempt first one that is available and online...
    cacheWriteInstanceConfig(chessinstances)
    ENV.NODE_ENV = selectedinstance.node_env; 
  }

  return performPull(configrepo, null, owner, errHandler || errorHandler || ((e)=>{ throw e })).then( successHandler )
  .catch( (e)=>{
    // if(e){
      if(Promise.resolve(e) === e) return e;
      console.error(e)
      throw e; // Not a hard error but we need this for bcontinueonfailure
    // }
  })
}

var __acquireData = function (selected, owner, clusternodename, datarepo, errHandler) {

  datarepo = datarepo || selected.instanceName + '-config-' + selected.node_env;

  var errorHandler = (e) => {
    if(e.messages.join(' ').match(new RegExp (`fatal: unable to access '${selectedinstance.reposerver}/${owner}/${datarepo}.git/': Failed to connect to .*? port .*? after .*? ms: Timed out`))){
      // console.error('Could not connect to repo server. Timed Out')
      return 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 '${selectedinstance.reposerver}/${owner}/${datarepo}.git/' not found`))){
      var choices = { 
        t : `install a new temporary local instance with this name ( will not persist ). 
                Use your own username for additional options. You can request for a username at chess@bbh.org.in )`
      , e : 'exit' }

      if(selectedinstance.username !== 'guest' && selectedinstance.username !== 'demo') {
        choices = utils.assign({
          i : 'create a new instance with this name => will fork the default config under your username'
        , f : 'fork a new instance with this name for yourself for this node from another instance'
        , o : 'fork a new instance with this name for your organization from another instance' // prompt organization name...
        , c : 'create a custom config for yourself for this node' // prompt hostname as nodename
        , p : 'create a custom config for yourself '
          }, choices)
      }

      return 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(datarepo, null, owner, errHandler || errorHandler || ((e)=>{ throw e })).then( successHandler )
  .catch( (e)=>{
    // if(e){
      if(Promise.resolve(e) === e) return e;
      console.error(e)
      throw e; // Not a hard error but we need this for bcontinueonfailure
    // }
  })
}

var launchpath = path.normalize(process.cwd())
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 we were run.
// The easisest would be to ask for a target directory and default to current dir.... 
var instanceroot = path.normalize(thisscriptdir) === path.normalize(launchpath) ? path.normalize(thisscriptdir + '/..') : launchpath ;

// PB : TODO -- Embed this in the build instead of inlining it.
  // Also attepmt to load from ../chess-config/...
var __default = ((name, options)=>{

  // Default set of users in main repos.
  var users = [
      { username : `${options.username}`, password : `${options.password}` }
    , { username : `chess` }
    // , { username : `baptistdev`, password : 'encrypted' }
    // , { username : `guest`, password : 'encrypted' }
  ]

  // ${options.reposerver} should be used to lookup current config.

  // User can always add more branches and remotes as needed. Mainifest only occupies 
      // well defined namespaces
  var remotes = {
    // these are both fetch and push remotes. Use push - remotes to override push.
      'chess' : { 
          server : `${options.reposerver}`, user : 'chess', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
        , push : 'no-pushing' }
    , 'baptistdev-public' : { 
        server : `https://github.com`, user : 'baptistdev', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      , push : 'no-pushing' }
      

    // Multiple urls dont tell us the current origin which may be 
    // different based on currently available/accessible based on device and client.
    // We just treat them as different remotes and merge as needed.
    // 
    , 'origin' : { 
        server : `${options.reposerver}`, user : '${options.username}', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      }
    , 'origin-public' : { 
        server : `https://git.bbh.org.in`, user : 'chess', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      , push : {
          server : `${options.reposerver}`, user : `${options.username}`, path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} 
        }
      }
    , 'origin-unc' : { 
        server : `//172.16.0.27/repos`, user : '${options.username}', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
      }
    // , { `${options.username}` : `https://git.bbh.org.in/${options.username}/elxr.git` }
  }

    // , 'fetch-remotes' : [] // Multiple fetch remotes are not supported by git.
      // We therefore need to use 
      // - a pullall 
      // - or branch alias for multiple remote branch tracking branch strategy.
      // 		-- This is however limited to corresponding branch names 

    // tracking branches.
    // We at least need one branch for each remote that we wish to track.
    // , 'tracking-branches' : [
    //   { master : ['origin/master', 'chess/master'] }
    // ]

  var reposerverinstances = {
      'http://git.bbh' : { users, remotes }
    , 'https://git.bbh.org.in' : { users, remotes, external : true }
    , '//172.16.0.27/repos' : { users, remotes }
    , 'https://github.com' : {
          // We host a miniaml set of repositories in github. 
          get users() { return [{ username : `${this.username}` }]}, username : `baptistdev`
          , remotes : { 
            'baptistdev-public' : { 
              server : `https://github.com`, user : 'baptistdev', path : ``, get url(){ return `${this.server}/${this.user}/${this.path}`} // fetch
            , push : 'no-pushing' }
          // , Add other remotes here. 
        }
        , external : true, public : true 
    }
  }
  return {
      reposervers : Object.keys(reposerverinstances)
    , reposerverinstances

    // Common baseline repos for all chess instances.
    , repos : [
       { repo : 'ember-masonry-grid' /*, branch : master*/ } // Default need not be specified.
      , { repo : 'bbhverse' }
      , { repo : 'clientverse' }
      , { repo : 'serververse' }
      , { repo : 'elxr' }
      , { repo : 'ember-searchable-select' }
      , { repo : 'loopback-component-jsonapi' }
      , { repo : 'loopback-jsonapi-model-serializer' }
      , { repo : 'loopback-connector-mysql' }
      , { repo : 'loopback-connector-ds' }
      , { repo : 'chess-server-lib' }
      , { repo : 'ember-service-worker' }
      , { repo : 'ember-service-worker-asset-cache' }
      , { repo : 'ember-service-worker-cache-fallback' }
      , { repo : 'ember-service-worker-index' }
      , { repo : 'ember-sw-client-route' }
      , { repo : 'global-this' }
    ]

    , elevated : [ ]
    , exludeMergeRepos : { }
  }

})(
    '__default' // name
  , { username : 'guest', instanceName : 'chess', node_env : 'development', reposerver : 'https://git.bbh.org.in' } // options
)
// We first load the default and then override with a runconfig if it exists else we override with the interactive prompts.
// Then acquire and reload and replace this default.


var hasElxr = function(path, options, cb) {
  // PB : TOOD -- Navigate up the folder chain to discover the relevant .elxr directory.
  options = options || {};
  

  var tasks = [
      '/elxr' // Is there a subfolder named elxr 
    , '/elxr/.git' // which is self git repository
    , '/elxr/.elxr' // and has .elxr subfolder
    , '/elxr/.elxr/' + __ALIAS__STAMP__  // Which has our stamp.
  ]

  if(options.sync) { return tasks.earlyreduce((acc, tpath)=>{
    var value = existsFolderSync(path + tpath);
    return { value, done : acc && !value };
  }).value }

  if(cb) return cb(null, tasks.earlyreduce((acc, tpath)=>{
    var value = existsFolderSync(path + tpath);
    return { value, done : acc && !value };
  }).value );
  
  return Promise.resolve(tasks.earlyreduce((acc, tpath)=>{
    var value = existsFolderSync(path + tpath);
    return { value, done : acc && !value };
  }).value);
}

var hasElxrSync = function(path){ return hasElxr(path, { sync :true}); }

var detectfromroot = function(root){
  return { root, node_env : path.basename(root), instanceName : path.basename( path.dirname(root) ) }
}
  
var detectLocalInstances = function () {
  console.log(`launchpath = ${launchpath}`)
  console.log(`thisscriptdir = ${thisscriptdir}`)

  // PB : TODO -- !Postpone this.
  console.log(`instanceroot = ${instanceroot}`) // Not yet confirmed...

  // Note : Paths should already be normalized fefore this.

  var root = instanceroot;
  var detected = { root };
  var instanceoptions = [clioverrides]

  return hasElxr(launchpath).then( (elxrCliExists) => {

    // We need a reference to the root director for elxr cli to be properly oriented.
    if (( elxrCliExists && path.normalize(launchpath + '/elxr')) === thisscriptdir) {
      // We were run from the proper root with elxr cli in the subfolder. 
      instanceroot = root = launchpath;
      instanceoptions.splice( 0, 0, detected = { root })
      instanceoptions.splice( 0, 0, detectfromroot(root))
    }
    else {
      if(path.normalize(launchpath + '/elxr') === thisscriptdir) {
        // elxrCliExists is false -- and yet thiscriptdir is still proper.
        // PB : TODO -- Maybe a warning / abort if for some reason this scriptdir should not be taken over...
        console.error('Warning : detected thisscriptdir as elxr subfolder but not recognized as elixir. git updates might fail.')
        instanceroot = root = launchpath;
        instanceoptions.splice( 0, 0, detected = { root })
        instanceoptions.splice( 0, 0, detectfromroot(root))
      }
      else if (launchpath === thisscriptdir) {
        
        var parentHasElxr = hasElxrSync(launchpath + '/..')
        // PB : TODO -- verify if we have .elxr folder in the parent...
        if(!parentHasElxr) {
          // ! thisscriptdir is not elxr.
          console.error('Invalid run location in subfolder that looks like elxr. We should probably abort as elxr will not sync.')
        }

        // Same directory doesn't mean we are being run from elxr sub  directory. 
        // In standalone build script we may or not be in the same location.
        if (BUILD_VERSION.indexOf('Version: {version} - built on {date}') > -1) {
          // Unbuilt therefore we are in the elxr sub directory.

          instanceroot = root = path.normalize(launchpath + '/..');
          instanceoptions.splice( 0, 0, detected = { root });
          instanceoptions.splice( 0, 0, detectfromroot(root));
        }
        else {
          // Built version.
          // We could have been run from the elxr subfolder. Highly likely that the built version isn't the full elxr.
          if(parentHasElxr) {
            // Built version was run from the full elxr subfolder. Should work 
            // PB : TODO -- but we should switch to the full version...
            instanceroot = root = path.normalize(launchpath + '/..');
            instanceoptions.splice( 0, 0, detected = { root })
            instanceoptions.splice( 0, 0, detectfromroot(root))
          }
          else {
            instanceroot = root = launchpath;
            instanceoptions.splice( 0, 0, detected = { root })
            instanceoptions.splice( 0, 0, detectfromroot(root))
            // Assume current launchpath is a new instance and create.
            // Figure out the instnace name and environment from parent folders as an alternative option with confirmation if not provided in the arguments.

            // if(clioverrides.instanceName) {
            //   if(clioverrides.node_env) {
            //     instanceroot = root = path.normalize(launchpath + '/' + clioverrides.instanceName + '/' + clioverrides.node_env)
            //     instanceoptions.splice( 0, 0, detected = { root, instanceName : clioverrides.instanceName, node_env : clioverrides.node_env })
            //     // instanceoptions.splice( 0, 0, detectfromroot(root)) // This can be an option but is unnecessary unless a confirmation is provided.
            //     // also folder names may have no relation to the actual instanceName and instanceType coz we need to have many 
            //       // eg : floder name can be elixir01 but instance name is elixr
            //   }
            //   else {
            //     instanceroot = root = path.normalize(launchpath + '/' + clioverrides.instanceName + '/' + 'development')
            //     instanceoptions.splice( 0, 0, detected = { root, instanceName : clioverrides.instanceName, node_env : 'development' })
            //     instanceoptions.splice( 0, 0, detectfromroot(root)) // A recessive option only.
            //   }
            // }
            // else {
            //   instanceroot = root = launchpath;
            //   if(clioverrides.node_env) {
            //     instanceoptions.splice( 0, 0, detected = { root, node_env : clioverrides.node_env })
            //     instanceoptions.splice( 0, 0, detectfromroot(root))
            //   }
            //   else {
            //     // Nothing was specified... We only have one option from root.
            //     instanceoptions.splice( 0, 0, detected = detectfromroot(launcpath))
            //   }
            // }
          }
        }
      }
      else {
        if(elxrCliExists) {
          instanceroot = root = launchpath;
          instanceoptions.splice( 0, 0, detected = { root })
          instanceoptions.splice( 0, 0, detectfromroot(root))
        }
      }
    }
   
    instanceroot = detected.root
    __default.root = root;
    clioverrides.root = clioverrides.root || root; 
    
    // Resolves empty array when No known instances detected.
    return Promise.resolve(instanceoptions)
  })

}

var getReconfirmAll = ()=>{return { instanceName : true, instanceType : true, reposerver : true, username : true, password : true } }
if(clioverrides.reconfirm) {
  var reconfirm = getReconfirmAll()
}
else { var reconfirm = {}; }

var shouldPrompt = function(k, possiblePrompts, target){
  return ((possiblePrompts[k] !== undefined && possiblePrompts[k] !== null) && target[k] !== possiblePrompts[k] 
      || (possiblePrompts[k] === undefined || possiblePrompts[k] === null) && (target[k] === undefined || target[k] === null) 
      || reconfirm[k])
}

var getBoundEachPrompt = function(target, possiblePrompts, promptables, choices, promptsfilter) {
  return function(prompts, k, i, a){
  
    
    // No local instances config found. We use a default initialized instance available in selectedinstance
    // Confirm those that were not supplied as user choices in runtime args and proceed to reattempt.
    // PB : TODO -- selectedinstance === __default check to prompt everything...
    if(  shouldPrompt(k, possiblePrompts, target) ) {
      delete reconfirm[k];
      // console.log(k)
      // console.dir(possiblePrompts); //console.dir(target)
      prompts.push(async ()=>{ 
        // PB : NOTE -- Important in async cases when this needs to be in the same state as when it was invoked.
          // We take a snapshot... Shallow.. !! If required deep should be used based on use case. 
          // If latest altered state is required we can reerence this directly.
        // var asyncthis = Object.assign(this); 
        promptables[k].choices = choices[k] 
        Object.defineProperty(target, k, getPromptableAsyncPropDescriptor(k, promptables[k]));
        return await target[k] 
      })
    }
    delete possiblePrompts[k] // PB : TODO We should keep this around instead of deleting so we can do a second pass if required.
    return prompts
  }
}

var __interactive_prompts = function( target, choices, promptsfilter ){

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

  var interactionpoints = {
    runchoice : {
        label :  
        `Choose an option :
        d) Install the default chess instance. 
            => elxr i chess node_env=development --default
        n) Create your custom new instance interactively
            => elxr i {{instanceName}} node_env={{environment}}
        i) Choose an instance and environment to install
            => elxr i {{instanceName}} node_env={{environment}}
        c) Choose a command to run ( pull, use, i, npmi ... ) <= pull
            => elxr {{cmd}} {{instanceName}} node_env={{environment}}
        h) Help
        q) Quit
        : `
        , choices : []
        , defaultchoice : 'c'
        , interpret : function(choice){
          var interpret_map = {
            d : function(){
              processedArgs._[0] = 'i'
              target.instanceName = processedArgs._[1] = processedArgs._[1] || 'chess'
              target.node_env = processedArgs.node_env = (process.env.NODE_ENV && process.env.NODE_ENV.trim()) || processedArgs.node_env || 'development'
              target.reposerver = 'https://git.bbh.org.in'
            }
            , n : function() { processedArgs._[0] = 'i' }
            , i : function() { processedArgs._[0] = 'i' }
            , c : async function() {
              Object.defineProperty(this, 'cmd', getPromptableAsyncPropDescriptor('cmd', { 
                label : `Enter cmd : 
                p) pull
                  Default <= p
                : `
                , defaultchoice : 'pull'
                }
              ));

              var cmd = await target['cmd'];
              if (!cmd || cmd === 'p') { target['cmd'] = processedArgs._[0] = 'pull' }
              else target['cmd'] = processedArgs._[0] = cmd
              return cmd;
            }
            , h : function() { console.log(elxr.help()); process.exit() }  // PB : TODO -- Why do we need log.
            , q : function() { process.exit() }
          }
          var __interpreter = interpret_map['c']
          // if(!choice) return interpret_map['c']() // This should not happen prompter should always give us a default choice.
          if(interpret_map[choice]) __interpreter = interpret_map[choice];
  
          return __interpreter.call(target)
        }
      }
    , instanceName : { label : `Enter Instance Name ( <= ${target.instanceName || 'chess'} ) : `
      , choices : choices['instanceName'], defaultchoice : 'chess'}
    , instanceType : { label : `Enter Instance Type ( <= ${target.instanceType || 'development'} ) : `
      , choices : choices['instanceType'], defaultchoice : 'development'}
    , reposerver   : { label : `Enter Repo Url ( <= ${target.reposerver || 'https://git.bbh.org.in'} ) : `
      , choices : choices['reposerver'], defaultchoice : 'https://git.bbh.org.in'}
    
    , get username()  { return { label : `Enter User Id for ${target.reposerver} ( <= ${target.username || 'chess'} ) : `
        , choices : choices['username'], defaultchoice : 'chess'} }
    , get password()  { return { label : `Enter Password for ${target.username} @ ${target.reposerver} ( <= ${target.password || ''} ) : `
        , choices : choices['password'], defaultchoice : '***'} }
    , get email()  { return { label : `Enter Email for ${target.username} @ ${target.reposerver} ( <= ${target.email || ''} ) : `
        , choices : choices['email'], defaultchoice : 'guest@bbh.org.in'} }

  }

  
  function getPromptKeys() {
    if(! (processedArgs.label || processedArgs._[0]) ) return Object.assign({}, interactionpoints);
    
    return promptkeys
  }
  var eachPrompt = getBoundEachPrompt( target, getPromptKeys() , interactionpoints, choices, promptsfilter)
  return   Object.keys(promptsfilter || interactionpoints).reduce(eachPrompt, [])
}


var downloadsdir = '../Downloads';
var prerequisites = [
  {
    shellcmd: 'git',
    name : 'git',
    url: 'https://github.com/git-for-windows/git/releases/download/v2.31.0.windows.1/Git-2.31.0-64-bit.exe'
    , installer: 'Git-2.31.0-64-bit.exe'
    , installcmd: ['cmd', ['/c', 'start',
      '/WAIT', path.resolve(downloadsdir + '/' + 'Git-2.31.0-64-bit.exe')
      , '/VERYSILENT'
      // , '/MERGETASKS=!runcode' // This is required only for vscode...
    ]]
    , preinstallsteps: function() {
      var steps = [
        () => {
          if (!existsSync(downloadsdir + '/' + this.installer)) {
            return nodeShellExec(`${selectedinstance.root}/.elxr/run-${runtimestamp}/download.bat`, [this.url, downloadsdir + '/' + this.installer])
          }
          else return Promise.resolve(true)
        }
      ]
      var prompts = this.getuser(null, ()=>{
        // console.log('preinstallsteps')
        // var gitUser = 'guest';
        // var gitEmail = 'guest@bbh.org.in';
        // var prompts = [];
        // prompts.push( ()=>{ return cli.prompt(choices['username'], 'git user name').then(gituser => gitUser = gituser) } )
        // prompts.push( ()=>{ return cli.prompt(choices['useremail'], 'git user email').then(gitemail => gitEmail = gitemail) } )
  
        // console.log('prompting in preinstallsteps')
        // return any(prompts).then(()=>{
        //   var steps = [
        //       ['git', ['config', '--global', '--add', 'user.name', `${gitUser}`]]
        //     , ['git', ['config', '--global', '--add', 'user.email', `${gitEmail}`]]
        //   ]
        //   return any(steps.map(getshelltask)).then(() => { 
  
        //   })
        // });

        return Promise.resolve(true)
      })
      
      return any([any(steps), prompts])
    }
    , installsteps: function () {
      return any([this.installcmd].map(getshelltask))
    }
    , postinstallsteps: function(err, users){
      return this.getuser(null, (err, data)=>{
        // ignore err and proceed with data as guest.
        console.dir(data)
        if(data && data.length === 1 && !shouldPrompt('username', promptkeys, selectedinstance)  ) {
          return username = data[0];
        }
        
        data = data || ['guest']
        choices['username'] =  Array.from( new Set( data.concat( (choices['username'] || []) )) )

        console.log('prompting in postinstallsteps')

        var username = 'guest';
        var email = 'guest@bbh.org.in';
        var password = '***';
        
        return any( getInteractionPoints(selectedinstance, promptkeys, { username, password, email})  ).then(()=>{
          if(!data.find(e => e === selectedinstance.username)) {
            var steps = [
                ['git', ['config', '--global', '--add', 'user.name', `${username}`]]
              , ['git', ['config', '--global', '--add', 'user.email', `${email}`]]
            ]
            return any(steps.map(getshelltask)).then(() => { 
  
            })
          }
          else {
            return Promise.resolve(true)
          }
        });
      })
    }
    , install: function () {
      return any([ /*this.preinstallsteps,*/ this.installsteps.bind(this), this.postinstallsteps.bind(this)])
    }
    , verifyAndInstall : function(){
      return getTaskCheckExists(this.shellcmd, { ignorefailures: true })().then((exists) => {
        if(exists) {
          // return any(['git', ['config', '--global', '-l']].map(getshelltask))
          return this.postinstallsteps.bind(this)()
        }
        return this.install();
      });
    }
    , getuser : function(repo, onResult){

      var __onResult = onResult || function(e, data){
        data = data || []
        choices['username'] =  Array.from( new Set( data.concat( (choices['username'] || []) )) )
        // console.dir(choices)
        return data[0]
      }
 
      var globalOrLocal = '--global';
      if(repo) globalOrLocal = '--local'

      return any([['git', ['config', globalOrLocal, '--get-all', 'user.name']]].map(getshelltask)).then((result)=>{
        // not yet configured.
        if(!result.success) return __onResult(result)
        else {
          var users = result.messages[0].trim().split('\n');
          if(users.length === 0 ||
              users.length === 1 && users[0] === 'guest') {
            
            return __onResult(result)
          }
          else {
            return __onResult(null, Array.from( new Set( users ) ) ); }// PB : TODO == We should probably prompt with all the users available for selection ! 
        }
      })
      .catch((e)=>{ 
        console.log(e) 
        return __onResult(e)
      })
    }
  }
  ,
  {
    shellcmd: 'node',
    name : 'ndoe',
    url: 'https://nodejs.org/dist/v14.16.0/node-v14.16.0-x64.msi'
    , installer: 'node-v14.16.0-x64.msi'
    , installcmd: ['MSIEXEC.exe', ['/i'
      , path.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) {
  var dirname = path.dirname(filePath);
  if (fs.existsSync(dirname)) {
    return filePath;
  }
  ensureDirectoryExistence(dirname);
  fs.mkdirSync(dirname);
  return filePath;
}

var mainTasks = [];
function verifyAndInstallPrerequisites() {
  fs.writeFileSync(ensureDirectoryExistence(path.normalize(`${selectedinstance.root}/${downloadsdir}/readme.txt`)), `${getVersion()} Your local downloads for this instance`)
  
  // PB : TODO include and build from files... using rollup..
  var downloadbatch =
    `::**************************************************************************
  :Download_ <url> <File>
    Powershell.exe ^
    $AllProtocols = [System.Net.SecurityProtocolType]'Ssl3,Tls,Tls11,Tls12'; ^
    [System.Net.ServicePointManager]::SecurityProtocol = $AllProtocols; ^
    (New-Object System.Net.WebClient).DownloadFile('%1','%2')
  exit /b
  ::**************************************************************************`
  fs.writeFileSync(`${selectedinstance.root}/.elxr/run-${runtimestamp}/download.bat`, downloadbatch)

  
  var windowselevate =
    `     
      <html><HTA:APPLICATION  ID="windowselevate" icon="#"/>
      <script language="vbscript">
        document.title = "elxr control panel"
        self.ResizeTo 200,600
        
        Sub Window_Onload
        self.MoveTo (screen.availWidth - (document.body.clientWidth + 40)),10
        End Sub

        Set objShell = CreateObject("WScript.Shell")
        Set objENV = objShell.Environment("Process")
        dim NODE_ENV 
        NODE_ENV = objENV("NODE_ENV")
      </script>

      <script language="javascript">
        //WINDOWSTATE="minimize" SHOWINTASKBAR="no" SYSMENU="no" CAPTION="no"
        // https://devblogs.microsoft.com/scripting/how-can-i-pass-command-line-variables-to-an-hta-when-it-starts/
        // alert(windowselevate.commandLine)
        var args = windowselevate.commandLine.split('"').slice(3);
        // alert(args)
        var processedArgs = { _ : [] }
        var namedArgs = [];
        for(var item in args){
          if(args[item].charAt(0) === '-'){ 
            namedArgs.push(args[item])
            var split = args[item].split('=');
            processedArgs[split[0].slice(2)] = split[1] || true;
          } 
          else processedArgs._.push(args[item]);
        }
        // args = args.forEach(function(item){ })
        // alert('processedArgs._ : ' + processedArgs._);
        // alert(processedArgs.runas);
        
        // PB : TODO -- Convert all the cli args back to string.
        var cargs = (processedArgs.debug ? '--inspect-brk=9228' : '') + ' elxr ' + processedArgs._.join(' ') + ' ' +  namedArgs.join(' ');
        // alert(cargs)
        var shell = new ActiveXObject('shell.application'); 
        // alert('launching node privilged. ' + processedArgs['nodepath']) 
        // shell.ShellExecute('where', 'node', '', '', 10);
        // shell.ShellExecute('cmd.exe', '/k notepad.exe', '', 'runas', 1);
        // shell.ShellExecute('cmd.exe ', '/k node "' + cargs + '"', '', 'runas', 1);
        shell.ShellExecute('node', cargs, '', 'runas', 1);
        // shell.ShellExecute(processedArgs['nodepath'], cargs, '', 'runas', 1);
        var fso = new ActiveXObject('Scripting.FileSystemObject');
        
        window.onload = function() {
          document.body.style.backgroundColor = 'black';
          document.body.style.fontFamily = 'arial';
          var log = document.createElement('div');
          log.innerHTML='Please Wait';
          function l(msg){ log.innerHTML+= msg; };
          log.style.color = 'blue';
          log.style.width = '95%';
          log.id = 'log';
          document.body.appendChild(log);  
          
          l('<Br/>Current config : ')
          l('<Br/>NODE_ENV = ' + NODE_ENV)
          l('<Br/>cmd = ' + processedArgs._[0])
          processedArgs._[1] === 'use' ? l('<Br/>using = ' + processedArgs._[2]) : null;
          l('<Br/><Br/>')
          
          var timer = function(){
            l('.');
            if(fso.FileExists("run.done")) close();
            else window.setTimeout(timer, 1000);
          };
          window.setTimeout(timer, 3000);
        };
        
      </script>
      </html>
    
    `
  fs.writeFileSync(`${selectedinstance.root}/.elxr/run-${runtimestamp}/windowselevate.hta`, windowselevate)

  var downloadtasks = [];
  var installtasks = [];
  prerequisites.forEach(preq => {
    downloadtasks.push(getTaskCheckExists(preq.shellcmd, { ignorefailures: true })().then((exists) => {
      if (exists) console.log(`${preq.shellcmd} exists`)
      else {
        console.log(`${preq.shellcmd} is not installed`)
        return preq.preinstallsteps.call(preq).then(() => {
          installtasks.push(preq.install.bind(preq))
        })
      }
    }))
  })
  return Promise.all(downloadtasks).then(() => { return any(installtasks) })
}

var getPromptableAsyncPropDescriptor = function(propName, promptable){
  return {
    get (){
      return cli.prompt( promptable.choices, promptable.label, promptable.defaultchoice ).then(propValue => {
        
        var asyncprop = Promise.resolve(propValue)
        if(promptable.interpret){
          asyncprop = promptable.interpret(propValue) 
        }

        return asyncprop.then(
          ()=>{
            Object.defineProperty(this, propName, {
              value: propValue,
              writable: true,
              configurable : true,
              enumerable : true
            });
            return propValue
          }
        )
      })
    }
    // , set (propValue){
    //   Object.defineProperty(this, propName, {
    //     value: propValue,
    //     writable: true, // PB : TODO -- Use this to fix value permanently until run is over.
    //     configurable : true,
    //     enumerable : true
    //   })
    //   return propValue;
    // }
    , configurable : true
    , enumerable : true
  }
}




function acquirelocalinstances(selected){
  // utils.assign is used to cleanup duplicates...
  var chessinstances = utils.assign(require(path.normalize(selected.root + '/chessinstances.js')));
  return chessinstances
}

function findlocalinstances(chessinstances, instanceoptions){
  // We can expect a .elxr at each level.
    ['' /* instanceroot */, '../' /* instanceTypes or node_env */, '../..' /* instanceNames */].
      earlyreduce( ( value, p, i, a )=>{
        var localinstancesPath = `${instanceroot}/${p}.elxr`;
        if(existsSync( localinstancesPath )) {
          try {
            var chessinstances = acquirelocalinstances( { localinstancesPath } )
            return Object.keys(chessinstances).earlyreduce( ( value, instanceName) => {
                return Object.keys(chessinstances[instanceName]).earlyreduce( (value, instanceType) => { 
                      if(  path.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 { }
      }
    )
}


// function updateselection(selected) { selectedinstance = utils.assign(selectedinstance, selected) }
var selectedinstance = null;
var chessinstances = { current_run : {} };
var promptkeys = { 
  cmd : processedArgs._[0] || 'pull'
  // Try not to prompt anything unless absolutely necessary or reconfirm is forced.
  //   'instanceName' : true
  // , 'node_env' : true 
  // , username : ''
  // , runchoice : 'c'
} 
// promptkeys.runchoice = promptkeys.cmd ? 'c' : undefined

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

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

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

  var instances = []
  var reposervers = [];
  var instanceNames = []
  var instanceTypes = ['development', 'production'];
  Object.keys( chessinstances).forEach(instanceName => {
    if(instanceName === 'current_run') return;
    Object.keys( chessinstances[instanceName] ).forEach(node_env=>{
      var instance = chessinstances[instanceName][node_env];
      reposervers = reposervers.concat(instance.reposervers)
      if(instance.reposerver) reposervers.push(instance.reposerver)
      instances.push(instance)
      instanceTypes.push(instance.node_env)
      instanceNames.push(instance.instanceName)
    })
  })
  instances = instances.concat(detectedinstanceoptions)

  if(selectedinstance['instanceName']) instanceNames.push(selectedinstance['instanceName'])
  if(possiblePrompts['instanceName']) instanceNames.push(possiblePrompts['instanceName'])
  if(selectedinstance['reposervers'])  reposervers = reposervers.concat(selectedinstance['reposervers'])
  
  choices['instanceName'] =  Array.from( new Set(instanceNames.concat(choices['instanceName'])) )
  choices['reposerver'] =  Array.from( new Set(reposervers.concat(choices['reposerver'])) )
  choices['instanceType'] =  Array.from( new Set(instanceTypes.concat(choices['instanceType'])) )

  return __interactive_prompts(selectedinstance, choices, promptsfilter) 
}

var detection_state = {
  localInstanceDetected : false
}

const https = require('https')
const http = require('http');
const { resolve } = require('path');
const RESTAPI = (function(){

  // Singleton
  function RESTAPI(){}
  // RESTAPI.create = RESTAPI; // Returns the one singe instance which is the class itself
  // const options = {
  //   hostname: 'whatever.com',
  //   port: 443,
  //   path: '/todos',
  //   method: 'POST',
  //   headers: {
  //     'Content-Type': 'application/json',
  //     'Content-Length': data.length
  //   }
  // }
  RESTAPI.method = function(options, resolve, reject){
    var __method = function() {
      options.headers = options.headers || { 'Content-Type': 'application/json' }
      if(options.payload) {
        const data = new TextEncoder().encode( JSON.stringify(options.payload) )
        options.headers = options.headers || {
          'Content-Type': 'application/json',
          'Content-Length': data.length
        }
      }
      if(!options.authenticatepost) options.headers.Authorization = `token ${usertokens[options.username]}`

      var acquirer = getHTTPorS(options)    
      const req = acquirer.request(options, res => {
        if (res.statusCode < 200 || res.statusCode >= 300) {
          return reject(new Error('statusCode=' + res.statusCode));
        }
        var body = [];
        // res.setEncoding('utf8');
        res.on('data', function(chunk) {
            body.push(chunk);
        });
        res.on('end', function() {
            try {
                body = JSON.parse(Buffer.concat(body).toString());
            } catch(e) {
                reject(e);
            }
            resolve(body);
        });
      });
      
      req.on('error', error => {
        console.error(error)
        reject(error)
      })
      
      if(options.payload) req.write(data)
      req.end()
    }

    if(!options.authenticatepost && !usertokens[options.username]) {
      RESTAPI.authenticate(options, function(tokenresp){ 
        usertokens[options.username] = tokenresp.sha1
        __method(options, resolve, reject)
      },
      function(err){ throw err}
      )
    }
    else __method(options, resolve, reject)
  }

  RESTAPI.post = RESTAPI.method

  var usertokens = {}

  RESTAPI.authenticate = function(options, resolve, reject){
    options.headers = options.headers || { 'Content-Type': 'application/json' }

    if(!usertokens[options.username]) {
      // Authenticate and acquire token.
      // https://git.bbh/api/v1/users/<username>/tokens
      // curl -XPOST -H "Content-Type: application/json"  -k -d '{"name":"demo"}' -u demo:demo123 http://git.bbh/api/v1/users/demo/tokens
      var _options = Object.assign({}, options)
      // _options.username = 'demo'
      // _options.password = 'demo123'
      _options.method = 'POST'
      _options.headers.Authorization = `Basic ${Buffer.from(`${_options.username}:${_options.password}`).toString('base64')}`  
      _options.path = `/api/v1/users/${_options.username}/tokens`
      _options.authenticatepost = true

      var postoptions = { name : _options.username }
      delete _options.username
      delete _options.password
      _options.payload = postoptions
      RESTAPI.post( _options, function(tokenresp){ 
          // tokenresp = JSON.parse(tokenresp)
          usertokens[options.username] = tokenresp.sha1
          resolve(tokenresp)
        },
        function(err){ reject(err) }
      )
    }
    else resolve(tokenresp.sha1)
  }
  
  RESTAPI.get = RESTAPI.post = RESTAPI.method

  return RESTAPI
})();

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

const GITEA = (function(){

  function GITEA(){}
  GITEA.repository = {
    fork( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      // forkoptions = { owner : httpoptions.username, repo : {{reoptoFork}} }
      // giteaoptions = {
        // organization	string
            // --- organization name, if forking into an organization
        // }
      //  http://try.gitea.io/api/v1/repos/{owner}/{repo}/forks
      httpoptions.path = `/api/v1/repos/${cmdoptions.owner}/${cmdoptions.repo}/forks`
      httpoptions.method = 'POST'
      httpoptions.payload = giteaoptions;
      return RESTAPI.post(httpoptions, resolve || function(){}, reject || function(){} )
    }
    , updateattributes( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      httpoptions.path = `/api/v1/repos/${cmdoptions.owner}/${cmdoptions.repo}`
      httpoptions.method = 'PATCH'
      httpoptions.payload = giteaoptions;
      return RESTAPI.post(httpoptions, resolve || function(){}, reject || function(){} )
    }
  }

  GITEA.user = {
    getuser( httpoptions, cmdoptions, giteaoptions, resolve, reject ){
      // ​/users​/{username} // Get a user
      httpoptions.path = `/api/v1/users/${httpoptions.username}`
      httpoptions.method = 'GET'
      return RESTAPI.get(httpoptions, giteaoptions, resolve || function(){}, reject || function(){} )
    }
  }

  return GITEA
})();

// Wrapper for Git shell operations. Some meta operations will map to a bunch of GIT commands.
const GIT = (function(){
  function GIT(){}

  Object.assign(GIT, {
    'switch user'(username){
      var server = new URL(selectedinstance.reposerver);
      
      return GITEA.user.getuser({ hostname : server.host, protocol : server.protocol
        , username : selectedinstance.username, password : selectedinstance.password
      }).then(()=>{
        return nodeShellExec('git', ['config', '--replace-all', 'user.name', username],
          {
            inherit: true, shell: true,
            env: process.env
            , cwd: instanceroot + '/' + repo
            , runas: processedArgs.runas
            , title: `'git', ${['config', '--replace-all', 'user.name', username].join(' ')}`
          })
        }
      )
      .catch(e => {
        console.error(e + 'Could not switch. Probably no such user.')
      })

    }
  })

  return GIT
})();

function createInstance(target, source) {

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

  if(sourceinstance.local) {

    var options = {
      inherit: true, shell: true,
        env: process.env
      , cwd : instanceroot 
      , runas: processedArgs.runas
    }
    var cmdseq = [ 
      ['git', ['clone', `${args.remotebase}${args.sourcerepo}`, `${args.targetrepo}`], options]
    ]
    return any(cmdseq.map(getshelltask)).then(() => {  return true })
  }
  else {    
    // http://try.gitea.io/api/v1/org/{org}/repos
    
    if(source.reposerver !== target.reposerver && source.username !== target.username) {
      throw 'createInstance is possible only within the same repository server.'
    }

    var server = new URL(target.reposerver);
    return GITEA.repository.fork( { hostname : server.host, protocol : server.protocol
          , username : target.username, password : target.password
        }
        // , { repo : `${selectedinstance.instanceName}-config-${selectedinstance.instanceType}`}
        , { repo : `${args.sourcerepo}`, owner : `${target.username}` }, {}, function( repository ){
          return GITEA.repository.updateattributes( { 
                  hostname : server.host, protocol : server.protocol
                , username : target.username, password : target.password
              }
              , { repo : `${args.sourcerepo}`, owner : `${target.username}` }
              , { name : `${args.targetrepo}`}
            )
        }
      )
  }
  
  // GITEA.repository.updateattributes( { 
  //       hostname : server.host, protocol : server.protocol
  //     , username : selectedinstance.username, password : selectedinstance.password
  //   }
  //   , { repo : `chess-config`, owner : selectedinstance.username }
  //   , { name : `${selectedinstance.instanceName}-config-${selectedinstance.instanceType}${selectedinstance.nodeName ? '-' + selectedinstance.nodeName : ''}`}
  // )
   
  // return selectedinstance
}

var skipprerequisites = false;
function initinstances(selected_overrides) {
  var root = selected_overrides.root // We should always have this coz we are running at some place which is fixed by detectLocalInstances.

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

  var reposerver = selected_overrides.reposerver 
    || clioverrides.reposerver
    // || processedArgs.node_env
    || chessinstances.current_run.reposerver
  
  if(!instanceName) {
    promptkeys['instanceName'] = instanceName = chessinstances.current_run.instanceName = promptkeys['instanceName'] || __default.instanceName;
    promptkeys['node_env'] = node_env = chessinstances.current_run.node_env = promptkeys['node_env'] || __default.node_env;
    promptkeys['reposerver'] = reposerver = chessinstances.current_run.reposerver = promptkeys['reposerver'] || __default.reposervers[0];
  }

  if(!node_env) {
    promptkeys['node_env'] = node_env = chessinstances.current_run.node_env = promptkeys['node_env'] || __default.node_env;
    promptkeys['reposerver'] = reposerver = chessinstances.current_run.reposerver  = promptkeys['reposerver'] || __default.reposervers[0];
  }

  if(!reposerver) {
    promptkeys['reposerver'] = reposerver = chessinstances.current_run.reposerver  = promptkeys['reposerver'] || __default.reposervers[0];
  }

  chessinstances[instanceName] = chessinstances[instanceName] || createLocalChessInstance( { 
    instanceName, node_env, root : selected_overrides.root, reposerver : selected_overrides.reposerver /* promptkeys['reposerver'] */ } );
  chessinstances['current_run'] = { instanceName: instanceName, node_env, reposerver, root }

  if(path.normalize(selected_overrides.root) !== path.normalize(chessinstances[instanceName][node_env].root)) {
    throw "instanceName and instanceType specified doesn't match whats already present do you want to continue " + chessinstances[instanceName][node_env].root + ' does not match ' + selected_overrides.root
  }
  // Override sequence.
  // __default, chessinstances[current_run], instanceName-config-development, cliargs, interactve_promts
  selectedinstance = utils.assign(
      chessinstances[instanceName][node_env]
    , clioverrides
    , selected_overrides
    // , __interactive_prompts -- Cant just override. Also need selectedinstance to be ready...
  );

  // chessinstances[instanceName] = chessinstances[instanceName] || {}
  // chessinstances[instanceName][node_env] = chessinstances[instanceName][node_env] || {}
  
  // if(!selectedinstance.repos || selectedinstance.instanceName) {
  //   // Brand New.
  //   selectedinstance = Object.assign( __default, selectedinstance )
  // }
  
  if(!selectedinstance.repos[0].repo) {
    console.warn('repo manifest has obsolete format. Attempting upgrade.')
    selectedinstance.repos = selectedinstance.repos.map(function(repo){ return { repo } })
  }
  if(selectedinstance.elevated[0] && !selectedinstance.elevated[0].repo) {
    console.warn('elevated repo manifest has obsolete format. Attempting upgrade.')
    selectedinstance.elevated = selectedinstance.elevated.map(function(repo){ return { repo } })
  }
  
  // Config from server always override merges into selection except for the current selection.
  // PB : TODO -- utils.assign Array merges are non-distinct...
  chessinstances[instanceName][node_env] = selectedinstance;
  // chessinstances[selectedinstance.instanceName][selectedinstance.node_env] = selectedinstance;
  cacheWriteInstanceConfig(chessinstances)
  // PB : TODO -- We should probably write the new server config also...
  selectedinstance.reposerver = selectedinstance.reposerver || selectedinstance.reposervers[0] // PB : TODO -- Attempt first one that is available and online...

  return chessinstances
}

var skipprereqs = {}
var maintask = () => {
  
  // Default cmd to run !
  processedArgs._[0] === processedArgs._[0] || 'pull';  
  // selectedinstance.reposerver = selectedinstance.reposervers[0] // PB : TODO -- Attempt first one that is available and online from all that are available.

  if(!noprerequisites[processedArgs._[0]]
      && !skipprereqs[processedArgs._[0]]
    ) {
    return prerequisites.git.verifyAndInstall().then(()=>{
      var e = { message : 'verifyAndInstall', success : true}
      var inittasks = []
      if(!detection_state.localInstanceDetected) {
        var specifictask = ()=>{ return createInstance(selectedinstance) }
        var commantask = () => { preworkerconfig(); return elxrworker(true) }
        if(!__isElevated) {
        }
        else {
          specifictask = ()=>{ Promise.resolve(true) }
        }
        inittasks.push(specifictask().then( commantask ))
      }
      else {
        var specifictask = ()=>{ return acquireConfig(selectedinstance) }
        var commantask = () => { preworkerconfig(); return elxrworker(true) }
        if(!__isElevated) {
        }
        else {
          specifictask = ()=>{ return Promise.resolve(true) }
        }
        
        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( commantask )
        // .finally(()=>{
        //   fs.writeFileSync('run.log', ', ' + JSON.stringify({ error: e.message }), { 'flag': 'a+' })
        //   if(!e.success) fs.writeFileSync('run.done', 'error');
        //   // return process.exit()
        // }))
        )
      }
      
      return any(inittasks) 
    })
  }
  else {
    console.log('cmd has no preqs or has been configured to skip preqs')
    preworkerconfig()
    return elxrworker()
  }

}

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

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

  return detectLocalInstances().then((detectedinstanceoptions)=>{
    
    detectedinstanceoptions.splice(0,0, __default)
    
    var cmdinstance = cmds[clioverrides.cmd]
    var cmdprompts =  cmdinstance.getPossiblePrompts()
    // PB : TODO -- Most recent should be at the tip ! at index 0 so utils.reverseassign is required !!!
    selectedinstance = utils.assign( ...detectedinstanceoptions.slice(-2), promptkeys )
    // promptkeys = utils.assign(promptkeys, clioverrides)

    if(cmdprompts.instanceName) {
      // not an instanceless cmd.
      console.dir(selectedinstance)
      try {
  
        chessinstances = acquirelocalinstances(selectedinstance);
        findlocalinstances(chessinstances, detectedinstanceoptions)
        initinstances(selectedinstance) // use the local instances for defaults if at all possible.        
        var todo = any( getInteractionPoints(detectedinstanceoptions, promptkeys)  ).then(()=>{ 
          var inst = initinstances(selectedinstance)
          detection_state.localInstanceDetected = true;
          return inst;
        })
      }
      catch (e) {
        // PB : TODO -- verbose mode warning.. console.warn(e) // Missing chessinstances is not an error...      
        var todo = any( getInteractionPoints(detectedinstanceoptions, promptkeys)  ).then(()=>{ 
          return initinstances(selectedinstance)
        })
  
        // if(!processedArgs._[0] || !selectedinstance.node_env || !selectedinstance.instanceName){
        //   // Weve not been told what to do.
        //   todo = todo.then(() => { return acquireChoices(selectedinstance) })
        // }
    
        todo = todo.then(() => {
          try {
            chessinstances = acquirelocalinstances(selectedinstance)
            findlocalinstances(chessinstances, detectedinstanceoptions)
            detectedinstanceoptions.splice(0,0, __default)
            initinstances(selectedinstance)
            detection_state.localInstanceDetected = true;
          }
          catch (e) {
            // console.error(e)
            console.log('No local instances config found in current root = ' + selectedinstance.root);
            console.log('A config will be createed with the instance and environment chosen...')
            // return (async ()=>{return await __default.reposerver})().then(()=>{
            //   // selectedinstance = Object.assign(detectedInstance, clioverrides);
            //   return selectedinstance = Object.assign(__default, selectedinstance);
            // })
            detection_state.localInstanceDetected = false;
            return selectedinstance
          }
        })
      }
      return todo
    }
    else return Promise.resolve(true)
  })
  .then(()=>{

    if(noprerequisites[processedArgs._[0]]
      || skipprereqs[processedArgs._[0]]
    ) {
      return elxrworker()
    }

    if(!__isElevated) {
      ensureDirectoryExistence(`${selectedinstance.root}/.elxr/${__ALIAS__STAMP__}`)
      // collect garbage
      return dirs( (dir)=>{
        var matches = /run-(.*)/gm.exec(dir.name)
        if(matches) {
          if(+(matches[1]) < min) {
            min = matches[1]
            collect.splice( 0, 0, matches[1] ) 
          }
          else collect.push(matches[1])
        }
  
      }, `${selectedinstance.root}/.elxr` ).then(()=>{
        // delete garbage
        if(collect.length > retaincount) {
  
          var asyncs = [];
          while((collect.length - asyncs.length) > retaincount) {
            asyncs.push(getShellTask('rm',['-rf', `run-${collect[asyncs.length]}`], { cwd : `${selectedinstance.root}/.elxr` })());
          }
          return Promise.all(asyncs)
        }
        else return true
      })
    }
    else return true;
  })
  .then(()=>{
    // PB : TODO -- Keep only the last n runs...
    // Currently it retains 2*n when proc needs to be relaunched in elevated mode !!!
    ensureDirectoryExistence(`${selectedinstance.root}/.elxr/run-${runtimestamp}/download.bat`)
    
    if (!skipprerequisites && !__isElevated || processedArgs.forceprereqs && !__isElevated ) mainTasks.push(verifyAndInstallPrerequisites);
    mainTasks.push(maintask)
    return any(mainTasks);
  })
}

acquireElevationState().then(() => {
  

  return startElxr()
})

// detect if alread installed -> Take no action.
// download if no installer avalable -> next()
// install 
function chackandinstall(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...