Grunt - Middleman Cooperation

Gruntfile.coffee

module.exports = (grunt)->
 
  pkg = grunt.file.readJSON 'package.json'
 
  for taskName of pkg.devDependencies
    if taskName.substring(0,6) == 'grunt-'
      grunt.loadNpmTasks taskName
 
 
  grunt.initConfig
    external_daemon:
      mid_serve: 
        cmd: "bundle"
        args: ["exec","middleman","server"]
        options:  
          verbose: true
          
    typescript:
      base:
        src: ['typescript_source/main.ts']
        dest: 'source/javascripts/main.js'
        options:
          soureMap: true
 
    middleman:
      options:
        useBundle: true
      build:
        options:
          command: 'build'
 
    watch:
      options:
        livereload: true
      typescript:
        files: ['typescript_source/*.ts']
        tasks: ['typescript']
 
 
 
  grunt.registerTask 'default', ['typescript','watch']
  grunt.registerTask 'build', ['typescript', 'middleman:build']
  grunt.registerTask 'serve', ['typescript','external_daemon:mid_serve','watch']

package.json

{
  "name": "middleman_and_typescript",
  "version": "0.0.0",
  "description": "",
  "main": "Grutnfile.coffee",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "k5m",
  "license": "MIT",
  "devDependencies": {
    "grunt": "^0.4.4",
    "grunt-contrib-watch": "^0.6.1",
    "grunt-middleman": "^0.1.2",
    "grunt-typescript": "^0.3.4",
    "grunt-external-daemon": "^1.1.0"
  }
}