elxr/index.js

// --------------
// elxr 
//   A cli tool for elixr.

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

const { existsSync } = require('fs');
const fs = require('fs')
const { spawn, spawnSync } = require('child_process');
const cliargs = require('../elxr/cliargs'); // Use minimist...
const processedArgs = cliargs(process.argv.slice(2));
console.dir(processedArgs)

var path = require('path')
// Serialize a set of functions that will execute to return a promises one after the other.
// Will stop when any one fails.
function any(iterable, continueOnFailure) {
  return iterable.reduce( 
      (p, fn, i ,a) => {
          // console.log('accumulator :');
          // console.log(p);
          if(Promise.resolve(p) === p ) {
            return p.then((pVal) => {

              if(Promise.resolve(pVal) === pVal) {
                // Passed in function retured a promise. We still need to wait for it.
                pVal.then((pVal)=>{

                  // console.log('Then --pVal = ' + pVal + ' bContinue = ' +  continueOnFailure ); console.log(p);  
                  if(!pVal && !continueOnFailure) {
                    console.error("E : pVal :" + pVal);
                    // i==0 ? null :  console.error("E :1 a[i-1] " + a[i-1]);
                    // a.map((i)=>console.error(i.toString()));
                    console.error('debugData 3 -------------------');
                    // console.error(debugData);
                    console.error('debugData 3 -------------------');
                    
                    console.log("Cancelling remaining...");
                    throw 'Failed in reduce 1 '
                    return false; 
                  }
                  // console.log('calling fn : '+ fn);                 
                  return (Promise.resolve(fn) === fn ) ? fn : fn() ;
                })
              }
              else {

                // console.log('Then --pVal = ' + pVal + ' bContinue = ' +  continueOnFailure ); console.log(p);  
                if(!pVal && !continueOnFailure) {
                  console.error("E : pVal :" + pVal);
                  // i==0 ? null :  console.error("E :1 a[i-1] " + a[i-1]);
                  // a.map((i)=>console.error(i.toString()));
                  console.error('debugData 3 -------------------');
                  // console.error(debugData);
                  console.error('debugData 3 -------------------');
                  
                  console.log("Cancelling remaining...");
                  throw 'Failed in reduce 1 '
                  return false; 
                }
                // console.log('calling fn : '+ fn);                 
                return (Promise.resolve(fn) === fn ) ? fn : fn() ;
              }

              
              
            }).catch((error) => { 
              console.error("E : " + error);
              fn ? console.error("Fn : " + fn.toString()) : null;
              // i==0 ? null :  console.error("E :2 a[i-1] " + a[i-1]);
              // a.map((i)=>console.error(i.toString()));
              console.error('debugData 4-------------------------');
              // console.error(debugData);
              console.error('debugData 4-------------------------');

              throw 'Failed in reduce 2 '              
              return false; 
            }) 
          }
          else if(!p) {
            console.log("Bypass on failure");
            return false;
          } 
      }
      , Promise.resolve(true)
  );
}

var __isElevated = null;
var isRunningElevated = ()=>{
    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');
        throw false;
      });
    }
    else return Promise.resolve(__isElevated);
}


var cli = 'elxr';
var ver = '#unversioned'; 
var help = '#unkown list of commands... please refer dveloper documentation for ' + cli;

// 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'
}

// Relevant git repos
var gitRepos = [
  'ember-masonry-grid'
  , 'bbhverse'
  , 'clientverse'
  , 'serververse'
  , 'client'
  // , 'client/server'
  , 'elxr'
  , 'ember-searchable-select'
  , 'loopback-component-jsonapi'
  , 'elixir-config-development'
  , 'elixir-config-test'
  , 'cihsr-config'
  , 'cihsr-data'
  , 'elixir-data'
  , 'loopback-connector-ds'
  , 'chess-server-lib'
  , 'setup'
  , 'elixir-client-todos'
  , 'elixir-client-unlinked'
  , 'elixir-client'
  , 'ember-service-worker'
  , 'ember-service-worker-asset-cache'
  , 'ember-service-worker-cache-fallback'
  , 'ember-service-worker-index'
  , 'ember-sw-client-route'
  , 'global-this'
]

// Repositiories that have symlinks that required elevated priviletes in windows to create symlinks
// 
var elevatedRunasRepos = [
    'elixir-server'
  , 'cihsr-server' 
  , 'chess-server' 
]

var productionRepos = [
  'elixir-config-production'
]
var productionIsAllowed = true;
if(productionIsAllowed) gitRepos = gitRepos.concat(productionRepos)

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

  var op = {
      'h' : ()=>{ console.log(cli + ' ' + ver + ' ' + help); return '-h' }
    , 'undefined' : ()=>{ return op.h(); }
    , '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' : ()=>{
      return isRunningElevated().then(
        (isElevated) => {
          if(isElevated)  {
            try { 
              op[ processedArgs.label || processedArgs._[0] || 'h']()
            }
            catch(e){ 
              console.error('Error Invalid command : ' + e) 
              fs.writeFileSync('run.done', 'success')
            }
            finally {
            }
          } else throw false;
        }
      )
      .catch(()=>{
        console.log('Not Elevated 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 
        
        // PB : TODO -- Convert all the cli args back to string.
        var namedArgs = [];
        Object.keys(processedArgs).forEach((v)=>{ v!='_' ? namedArgs.push('--'+v+'='+processedArgs[v]) : null; })
        //console.log(' namedArgs : ' + namedArgs)
        process.env.NODE_ENV = process.env.NODE_ENV || 'development';
        var args = [__dirname + '/windowselevate.hta'].concat(processedArgs._).concat(namedArgs.join(' ')); args.push('--runas=self');
        nodeShellExec('MSHTA', [`"${args.join('" "')}"`]
          , {
              inherit : true
            , shell: true
            , env: process.env
            , runas : 'self'
            , title : `runas`
          }
        ).then(()=>{
          // runas returned.
          var runaslog = JSON.parse('[ { "success" : true, "result" : "runas Log" }' + fs.readFileSync('run.log', { flags : 'a+'}) + ']');
          runaslog.forEach((logEntry)=>{
            logEntry.succes ? (console.log(['success :' + logEntry.result]), console.log((logEntry.messages || []).join(' '))) : console.error(['error :' + logEntry.result]), console.error((logEntry.messages || []).join(' '))
          })
        })
        .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 defaultRepoServer = '//172.16.0.27/repos'

      var sequentialTaskShellCommands = [];
      if(!existsSync(`Z:/${repo}.git`)){
        sequentialTaskShellCommands = [
          // ['net', ['use', 'Z:', defaultRepoServer.replace('/','\\')], {
          //   inherit : true, shell: true
          //   , env: process.env
          // }]
            ['pwd', { cwd : 'Z:', inherit : true}]
          , ['mkdir', [`${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
          }]
          , ['git', ['remote', 'rename', 'origin', 'githubclone'], { cwd : `${repo}`}, (err)=>{
            console.log('Ignoring origin rename error : ' + err); return true; //return true to continue.
          } ] // PB ; Todo -- new repositories created locally will not have origin. Handle this failure.
          , ['git', ['remote', 'add', 'origin', `${defaultRepoServer}/${repo}.git`], { cwd : `${repo}`}]
        ]
        if(!existsSync(`Z:`)){
          sequentialTaskShellCommands.splice(0,0, ['net', ['use', 'Z:', defaultRepoServer.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 : `${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);

    }
    , 'pull' : (label) => {
      var env = Object.assign({}, process.env); // Shallow clone it.
      // console.dir(env)
      console.log('Running exlr pull : ' + path.dirname(__dirname))
      // nodeShellExec('cmd', ['/c', 'setup\\utility\\chess.bat', 'pull'], {
      // // nodeShellExec('cmd', ['/c', '..\\setup\\utility\\chess.bat', 'pull'], {
      //   stdio: ['pipe', process.stdout, process.stderr],
      //   inherit : true,
      //   shell: true,
      //   cwd : path.dirname(__dirname),
      //   env: env
      // })

      var performPull = repo => {
        if(existsSync(repo)) {
          console.log('pulling ' + repo)
          return nodeShellExec('git', ['pull'], {
            inherit : true, shell: true, 
            cwd : repo
            // , env: process.env
            , runas : processedArgs.runas
            , title : `git pull ${repo}`
          }).catch((e)=>{ console.error(e) }) 
        }
        else {
          console.log('cloning ' + repo)
          return nodeShellExec('git', ['clone', '//172.16.0.27/repos/' + repo + '.git'],
          {
            inherit : true, shell: true, 
              env: process.env
            , runas : processedArgs.runas
            , title : `git clone ${'//172.16.0.27/repos/' + repo + '.git'}`
          }).catch((e)=>{ console.error(e) }) 
        }
      }

      if(!processedArgs.runas) gitRepos.forEach(performPull)
      return isRunningElevated().then( 
        (isElevated) => {
          if(isElevated) { 
            any(elevatedRunasRepos.map((repo)=>performPull(repo))).then(()=>{
              fs.writeFileSync('run.done', 'success')
            }).catch(()=>{
              fs.writeFileSync('run.done', 'error')
            })
          } 
          else throw false;
        }
      ).catch(
        () => {
          op['runas']() 
        }
      )
    }
    , 'npmi' : ()=>{
      var tasks = [];
      gitRepos.forEach(repo => {
        
        console.log('npm i for ' + repo)
        // nodeShellExec('pwd', [], {
        //   // inherit : true, shell: true
        //   cwd : repo
        //   // , env: process.env
        //   , title : `pwd  for ${repo}`
        // }).catch((e)=>{ console.error(e) })
        nodeShellExec('rm', ['package-lock.json'], {
          inherit : true, shell: true
          , cwd : repo
          , env: process.env
          , title : `rm 'package-lock.json' for ${repo}`
        }).catch((e)=>{ console.error(e) })
        tasks.push(()=>{ 
          var p = nodeShellExec('npm', ['i'], {
            inherit : true, shell: true
            , cwd : repo
            , env: process.env
            , title : `npm i for ${repo}`
          }).catch((e)=>{ console.error(e) })
          return p; 
        })
      })
      any(tasks);
      
    }
    , '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'
      var childPromise = nodeShellExec(cmd, ['--inspect=9228', 'elixir/server.js'], {
        // inherit : true,
        shell: true, 
        detached: true,
        stdio: 'ignore',
        cwd : 'elixir-server'
        , env: env
      })

      var child = childPromise.process;
      if (typeof child.pid !== 'undefined') {
        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
      // })
      var childPromise = nodeShellExec('ember', ['s'], {
      // var childPromise = nodeShellExec('node', ['--inspect=9227', './node_modules/.bin/ember', 's'], {
        // PB : TODO -- ember debugging.
        // inherit : true,
        shell: true,
        detached: true,
        stdio: 'ignore',
        cwd : 'client'
        , env: env
      })
      // .catch(e=>console.error(e))

      child = childPromise.process;
      if (typeof child.pid !== 'undefined') {
        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)   
    }
    , 'use' : ()=>{

      var runconfig = { NODE_ENV : process.env.NODE_ENV }  
      try { runconfig = Object.assign(runconfig, require('../run.js')) } catch(e) { }
      if((!processedArgs.runas || processedArgs.runas !== 'self') && 
        runconfig.NODE_ENV &&  runconfig.NODE_ENV === (process.env.NODE_ENV || runconfig.NODE_ENV) && 
        processedArgs._[1] && runconfig.use === processedArgs._[1])  {
      
        console.log(`No change detected. Already using requested specs : ${runconfig.NODE_ENV} ${runconfig.use}`)
        if(processedArgs.runas) { fs.writeFileSync('run.done', 'success') }
        return
      }

      var tasks = [
        ()=>{
          if(existsSync('config')) {
            var p = nodeShellExec('rmdir', ['config'], {inherit : true, shell: true, env: process.env }
              ).catch((err)=>{ console.log('Ignoring benign error : ' + err); return true; })
            return p;
          }
          else return Promise.resolve(true);
        },
        ()=>{ 
          if(existsSync('data')) {
            var p = nodeShellExec('rmdir', ['data'], { inherit : true, shell: true, env: process.env }
              ).catch((err)=>{ console.log('Ignoring benign error : ' + err); return true; })
            return p;
          }
          else return Promise.resolve(true);
        }
      ];
      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('./run.js', 'module.exports = ' + JSON.stringify(runconfig))
      
      any(tasks).then(()=>{
        if(!processedArgs.runas) return op['runas']() 

        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
              , env: process.env
            }).catch((e)=>{ console.error(e) }) 
            return p;
          }
        ];
        if(processedArgs._[1]) {   
          tasks = tasks.concat(
            [
              ()=>{ 
                var p = nodeShellExec('mklink', ['/D', 'data', runconfig.use + '-data'], {
                  inherit : true, shell: true
                  , 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')
        })
      }).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" --profile-directory="Profile 1" 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' : ()=>{
            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
            })
          }
        }
        g[processedArgs._[1]]();
    }
  }
  return op[label] ? op[label]() : null;
} 

// 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'

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

function nodeShellExec() {

    var args = Array.from(arguments);
    var opts = args[2] = args[2] || {}
    opts.title ? null : opts.title = `${args[0]} ${args[1]  }`
    const child = spawn(...arguments);

    var p = new Promise(function(resolve, reject){
      if(!opts.detached) {
        var messages = []; // PB : TODO -- Explore stream for Task level  aggregation to prevent interleaved messages from multiple tasks...
        var succes = true;
        // use child.stdout.setEncoding('utf8'); if you want text chunks
        child.stdout.setEncoding('utf8');
        child.stderr.setEncoding('utf8');
        child.stdout.on('data', (chunk) => { messages.push(chunk); /*console.log(chunk)*/});
        child.on('error', (chunk) => { succes = false; messages.push(chunk); /*console.error(chunk)*/ });
        child.stderr.on('data', (chunk) => { messages.push(chunk); /*console.log(chunk)*/});
        // child.stderr.pipe(process.stderr);
  
        child.on('close', (code) => {
          if(code !== 0) succes = false;
          if(opts.runas){
            fs.writeFileSync('run.log', ', ' + JSON.stringify({ result: ` ${opts.title} exited with code ${code}`, messages : messages }), {'flag':'a+'} )
          }
          else {
            succes ? console.log(['success : ' + ` ${opts.title} exited with code ${code}`]) : console.error([`error : ${opts.title} exited with code ${code}`])
            // console.log( messages.join('') )
            process.stdout.write( messages.join('') )
          }
          if(code !== 0) return reject(code)
          resolve(true)
        });
      }
      else {
        child.unref()
        resolve(true);
      }
    });
    p.process = child; 
    return p;
}