use rungulp worker

Author: clkao

app/asset/package.json

@@ -10,6 +10,10 @@
     "height": 0
   },
   "dependencies": {
-    "gulp": "~3.5.2"
+    "gulp": "~3.5.2",
+    "pretty-hrtime": "~0.2.0",
+    "semver": "~2.2.1",
+    "liftoff": "~0.8.4",
+    "gulp-util": "~2.2.14"
   }
 }

app/main.ls

@@ -27,14 +27,17 @@ remove-watcher = (dir) ->
   # XXX: cb to call on child exit
 
 create-watcher = (target, dir) ->
-  exec = require 'child_process' .execFile
-  child = exec 'node_modules/.bin/gulp' <[--require LiveScript ]> ++ target, {cwd: dir}, (error, stdout, stderr) ->
-    # XXX: some console feedback
-    console.log 'stdout: ' + stdout
-    #console.log 'stderr: ' + stderr
-    console.log 'exec error: ' + error if error isnt null
-  children.push child
-  folders-info.{}[dir]child = child
+  console.log "create #dir"
+  spawn = require 'child_process' .spawn
+  child = spawn 'node' ['./rungulp.js'] {stdio: ['ipc']}
+  child.on \error ->
+    console.log 'error' + it
+  child.on \message ->
+    console.log "[#dir] message " it
+  child.on \exit ->
+    console.log "[#dir] exit #it"
+  child.send {target, dir}
+  folders-info[dir] = {child}
 
 gui = require 'nw.gui'
 win = gui.Window.get!

app/rungulp.ls

@@ -0,0 +1,71 @@
+require! <[liftoff gulp fs]>
+
+handleArguments = (args) ->
+  argv = args.argv
+  cliPackage = require './package'
+  versionFlag = argv.v or argv.version
+  tasksFlag = argv.T or argv.tasks
+  tasks = argv._
+  toRun = if tasks.length then tasks else ['default']
+  if versionFlag
+    gutil.log 'CLI version', cliPackage.version
+    gutil.log 'Local version', args.modulePackage.version if args.localPackage
+    process.exit 0
+  if not args.modulePath
+    gutil.log (gutil.colors.red 'No local gulp install found in'), gutil.colors.magenta args.cwd
+    gutil.log gutil.colors.red 'Try running: npm install gulp'
+    process.exit 1
+  if not args.configPath
+    gutil.log gutil.colors.red 'No gulpfile found'
+    process.exit 1
+  if semver.gt cliPackage.version, args.modulePackage.version
+    gutil.log gutil.colors.red 'Warning: gulp version mismatch:'
+    gutil.log gutil.colors.red 'Running gulp is', cliPackage.version
+    gutil.log gutil.colors.red 'Local gulp (installed in gulpfile dir) is', args.modulePackage.version
+  gulpFile = require args.configPath
+  gutil.log 'Using gulpfile', gutil.colors.magenta args.configPath
+  gulpInst = require args.modulePath
+  logEvents gulpInst
+  if process.cwd! isnt args.cwd
+    process.chdir args.cwd
+    gutil.log 'Working directory changed to', gutil.colors.magenta args.cwd
+  process.nextTick (->
+    return logTasks gulpFile, gulpInst if tasksFlag
+    gulpInst.start.apply gulpInst, toRun)
+
+logTasks = (gulpFile, localGulp) ->
+  tree = taskTree localGulp.tasks
+  tree.label = 'Tasks for ' + gutil.colors.magenta gulpFile
+
+formatError = (e) ->
+  return e.message if not e.err
+  if e.err.message then return e.err.message
+  JSON.stringify e.err
+
+logEvents = (gulpInst) ->
+  gulpInst.on 'task_start', (e) -> 
+    process.send {running: e.task}
+    gutil.log 'Running', '\'' + gutil.colors.cyan e.task + '\'...'
+  gulpInst.on 'task_stop', (e) ->
+    time = prettyTime e.hrDuration
+    gutil.log 'Finished', '\'' + gutil.colors.cyan e.task + '\'', 'in', gutil.colors.magenta time
+  gulpInst.on 'task_err', (e) ->
+    msg = formatError e
+    time = prettyTime e.hrDuration
+    gutil.log 'Errored', '\'' + gutil.colors.cyan e.task + '\'', 'in', (gutil.colors.magenta time), gutil.colors.red msg
+  gulpInst.on 'task_not_found', (err) ->
+    gutil.log gutil.colors.red 'Task \'' + err.task + '\' was not defined in your gulpfile but you tried to run it.'
+    gutil.log 'Please check the documentation for proper gulpfile formatting.'
+    process.exit 1
+
+gutil = require 'gulp-util'
+prettyTime = require 'pretty-hrtime'
+semver = require 'semver'
+cli = new liftoff name: 'gulp'
+
+cli.on 'require', (name) -> gutil.log 'Requiring external module', gutil.colors.magenta name
+cli.on 'requireFail', (name) -> gutil.log (gutil.colors.red 'Failed to load external module'), gutil.colors.magenta name
+
+try require \LiveScript
+process.on \message ({dir, target}) ->
+  cli.launch (-> handleArguments @), {cwd: dir, _: [target]}