项目开发依赖，devDependencies安装gulp

全局安装 gulp=>$ npm install –global gulp

作为项目的开发依赖（devDependencies）安装：

$ npm install –save-dev gulp

在项目根目录下创建一个名为 gulpfile.js 的文件：

var gulp = require(‘gulp’);

使用插件要安装插件，如npm install –save-dev gulp-clear;

要启动服务器的时候输入gulp就可以了；

以下是代码片段

var gulp = require('gulp');
var $ = require('gulp-load-plugins')();
var open = require('open');

var app = {
  srcPath: 'src/',
  devPath: 'build/',
  prdPath: 'dist/'
};

gulp.task('lib', function() {
  gulp.src('bower_components/**/*.js')
  .pipe(gulp.dest(app.devPath + 'vendor'))
  .pipe(gulp.dest(app.prdPath + 'vendor'))
  .pipe($.connect.reload());
});

gulp.task('html', function() {
  gulp.src(app.srcPath + '**/*.html')
  .pipe(gulp.dest(app.devPath))
  .pipe(gulp.dest(app.prdPath))
  .pipe($.connect.reload());
})


gulp.task('json', function() {
  gulp.src(app.srcPath + 'data/**/*.json')
  .pipe(gulp.dest(app.devPath + 'data'))
  .pipe(gulp.dest(app.prdPath + 'data'))
  .pipe($.connect.reload());
});

gulp.task('less', function() {
  gulp.src(app.srcPath + 'style/index.less')
  .pipe($.plumber())
  .pipe($.less())
  .pipe(gulp.dest(app.devPath + 'css'))
  .pipe($.cssmin())
  .pipe(gulp.dest(app.prdPath + 'css'))
  .pipe($.connect.reload());
});

gulp.task('js', function() {
  gulp.src(app.srcPath + 'script/**/*.js')
  .pipe($.plumber())
  .pipe($.concat('index.js'))
  .pipe(gulp.dest(app.devPath + 'js'))
  .pipe($.uglify())
  .pipe(gulp.dest(app.prdPath + 'js'))
  .pipe($.connect.reload());
});

gulp.task('image', function() {
  gulp.src(app.srcPath + 'image/**/*')
  .pipe($.plumber())
  .pipe(gulp.dest(app.devPath + 'image'))
  .pipe($.imagemin())
  .pipe(gulp.dest(app.prdPath + 'image'))
  .pipe($.connect.reload());
});

gulp.task('build', ['image', 'js', 'less', 'lib', 'html', 'json']);

gulp.task('clean', function() {
  gulp.src([app.devPath, app.prdPath])
  .pipe($.clean());
});

gulp.task('serve', ['build'], function() {
  $.connect.server({
    root: [app.devPath],
    livereload: true,
    port: 3000
  });

  open('https://localhost:3000');

  gulp.watch('bower_components/**/*', ['lib']);
  gulp.watch(app.srcPath + '**/*.html', ['html']);
  gulp.watch(app.srcPath + 'data/**/*.json', ['json']);
  gulp.watch(app.srcPath + 'style/**/*.less', ['less']);
  gulp.watch(app.srcPath + 'script/**/*.js', ['js']);
  gulp.watch(app.srcPath + 'image/**/*', ['image']);
});

gulp.task('default', ['serve']);

以上代码安装的插件参考：这些都是用过npm 安装之后自动保存在package.json的devDependencies当中的；

    "gulp": "^3.9.1",
    "gulp-clean": "^0.3.2",
    "gulp-concat": "^2.6.0",
    "gulp-connect": "^5.0.0",
    "gulp-cssmin": "^0.1.7",
    "gulp-imagemin": "^3.0.3",
    "gulp-less": "^3.1.0",
    "gulp-load-plugins": "^1.2.4",
    "gulp-plumber": "^1.1.0",
    "gulp-uglify": "^2.0.0",
    "open": "0.0.5"