--src/
  ajax.js
  assets.js
  callbacks.js
  data.js
  deferred.js
  detect.js
  event.js
  form.js
  fx.js
  fx_methods.js
  gesture.js
  ie.js
  ios3.js
  selector.js
  stack.js
  touch.js
  zepto.js

dist/
node_modules/
src/
Gruntfile.js
package.json
package.json是依赖库文件
Gruntfile.js是执行步骤程序

{
 "name": "demo",
 "file": "zepto",
 "version": "0.1.0",
 "description": "demo",
 "license": "MIT",
 "devDependencies": {
  "grunt": "~0.4.1",
  "grunt-contrib-jshint": "~0.6.3",
  "grunt-contrib-concat": "~0.5.0",
  "grunt-contrib-uglify": "~0.2.1",
  "grunt-contrib-requirejs": "~0.4.1",
  "grunt-contrib-copy": "~0.4.1",
  "grunt-contrib-clean": "~0.5.0",
  "grunt-strip": "~0.2.1"
 },
 "dependencies": {
  "express": "3.x"
 }
}

module.exports = function (grunt) {
 grunt.initConfig({
 concat: {
  options: {
  },
  dist: {
   src: ['src/**/*.js'],//src文件夹下包括子文件夹下的所有文件
   dest: 'dist/built.js'//合并文件在dist下名为built.js的文件
  }
 },
 uglify: {
   build: {
    src: 'dist/built.js',//压缩源文件是之前合并的buildt.js文件
    dest: 'dist/built.min.js'//压缩文件为built.min.js
   }
  }
});
 grunt.loadNpmTasks('grunt-contrib-uglify');
 grunt.loadNpmTasks('grunt-contrib-concat');
 grunt.registerTask('default', ['concat','uglify']);
}

>grunt
Running "concat:dist" (concat) task
File dist/built.js created.
Running "uglify:build" (uglify) task
File "dist/built.min.js" created.
Done, without errors.

built.js
built.min.js

module.exports = function (grunt) {
 grunt.initConfig({
 concat: {//css文件合并
  css: {
   src: ['src/css/*.css'],//当前grunt项目中路径下的src/css目录下的所有css文件
   dest: 'dist/all.css' //生成到grunt项目路径下的dist文件夹下为all.css
  }
 },
 cssmin: { //css文件压缩
   css: {
    src: 'dist/all.css',//将之前的all.css
    dest: 'dist/all.min.css' //压缩
   }
  }
});
grunt.loadNpmTasks('grunt-css');
grunt.loadNpmTasks('grunt-contrib-concat');
 grunt.registerTask('default', ['concat','cssmin']);
}