simple_grunt_task.coffee

# in gruntfile.coffee

{exec} = require('child_process')
runCommand = (exp, done) ->
  exec exp, (error, stdout, stderr) ->
    return done(true) if error or stderr
    done(false,stdout)

grunt.registerMultiTask 'test', 'test command', ->
  conf = @
  done = conf.async()
  {src, dest} = conf.data.file
  runCommand 'ls -l', (error, ret) =>
    if error
      grunt.log.writeln('File "' + dest + '" failed.')
      return done(false)
    grunt.log.writeln('File "' + ret + '" created.');
    done(true)