如何根据需要使用grunt-contrib-watch和grunt-contrib-coffee来编译CoffeeScript？

我想在我保存的单个文件上运行咖啡和咖啡编译.我的项目中有数百个CoffeeScript文件,并且编译所有这些文件需要太多时间.

这是我的Gruntfile：

@H_575_9@module.exports = (grunt) -> grunt.initConfig pkg: grunt.file.readJSON 'package.json' coffee: all: expand: true bare: true cwd: 'src/coffeescript/' src: '**/*.coffee' dest: 'public/js/compiled' ext: '.js' coffeelint: all: ['src/coffeescript/**/*.coffee'] watch: coffeescript: files: ['src/**/*.coffee'] tasks: ['coffeelint','coffee'] options: spawn: false grunt.event.on 'watch',(action,filepath) -> grunt.config(['coffeelint','all'],filepath) grunt.config(['coffee',filepath) grunt.loadNpmTasks 'grunt-coffeelint' grunt.loadNpmTasks 'grunt-contrib-coffee' grunt.loadNpmTasks 'grunt-contrib-watch' grunt.registerTask 'default',['coffeelint','coffee','watch']

coffeelint任务仅在更改的文件上成功运行.

咖啡编译不产生任何JS文件,即使grunt说它运行.

保存一个咖啡文件后的输出是：

OK
>> File "src/coffeescript/app.coffee" changed.


Running "coffeelint:all" (coffeelint) task
>> 1 file lint free.

Running "coffee:all" (coffeE) task

Running "watch" task
Completed in 0.009s at Sat Feb 01 2014 13:10:07 GMT-0600 (CST) - WaiTing...

这里有什么问题？任何帮助将不胜感激！

更新：

这是一个工作示例：

@H_575_9@module.exports = (grunt) -> fs = require 'fs' isModified = (filepath) -> Now = new Date() modified = fs.statSync(filepath).mtime return (Now - modified) < 10000 grunt.initConfig coffee: options: sourceMap: true bare: true force: true # needs to be added to the plugin all: expand: true cwd: 'src/coffeescript/' src: '**/*.coffee' dest: 'public/js/compiled' ext: '.js' modified: expand: true cwd: 'src/coffeescript/' src: '**/*.coffee' dest: 'public/js/compiled' ext: '.js' filter: isModified coffeelint: options: force: true all: expand: true cwd: 'src/coffeescript/' src: '**/*.coffee' modified: expand: true cwd: 'src/coffeescript/' src: '**/*.coffee' filter: isModified watch: coffeescript: files: ['src/**/*.coffee'] tasks: ['coffeelint:modified','coffee:modified'] grunt.loadNpmTasks 'grunt-coffeelint' grunt.loadNpmTasks 'grunt-contrib-coffee' grunt.loadNpmTasks 'grunt-contrib-watch' grunt.registerTask 'default',['coffeelint:all','coffee:all','watch']

coffee:
  all:
    filter: (filepath) ->
        fs = require('fs')
        Now = new Date()
        modified =  fs.statSync(filepath).mtime
        return (Now - modified) < 10000 # or another difference in millyseconds