What Is Gulp

a building system

What Is Gulp

build on Node.js

What Is Gulp

written by javascript

What Is Gulp

a lots of plugins

What Is Gulp

Gulp is open source

Using Gulp

创建 gulpfile.js 文件

var gulp = require('gulp'),
   uglify = require('gulp-uglify');

gulp.task('minify', function () {
   gulp.src('js/app.js')
      .pipe(uglify())
      .pipe(gulp.dest('build'))
});

Using Gulp

定义模块

var gulp = require('gulp'),
    uglify = require('gulp-uglify');

定义任务

gulp.task('minify', function () {

});

gulp.src('js/app.js')
   .pipe(uglify())
   .pipe(gulp.dest('build'))

定义任务执行具体逻辑

Using Gulp

STREAMS

Using Gulp

举个栗子

gulp.task('js', function () {
   return gulp.src('js/*.js')
      .pipe(jshint())
      .pipe(jshint.reporter('default'))
      .pipe(uglify())
      .pipe(concat('app.js'))
      .pipe(gulp.dest('build'));
});

Using Gulp

举个栗子

Using Gulp

gulp.src()

使用 node-glob 匹配文件路径

js/app.js

js/*.js

js/**/*.js

!js/app.js    Excludes js/app.js from the match, which is useful if you want to match all files in a directory except for a particular file

*.+(js|css)    Matches all files in the root directory ending in .js or .css

gulp.src(['js/**/*.js', '!js/**/*.min.js'])

包含多个文件

Using Gulp

gulp.task()

gulp.task('greet', function () {
   console.log('Hello world!');
});

gulp.task('build', ['css', 'js', 'imgs']);

gulp.task('css', ['greet'], function () {
   // Deal with CSS here
});

gulp.task('default', function () {
   // Your default task
});

Using Gulp

gulp.watch()

gulp.task('watch', function () {
   gulp.watch('templates/*.tmpl.html', ['build']);
});

gulp.watch('templates/*.tmpl.html', function (event) {
   console.log('Event type: ' + event.type); // added, changed, or deleted
   console.log('Event path: ' + event.path); // The path of the modified file
});

var watcher = gulp.watch('templates/*.tmpl.html', ['build']);
watcher.on('change', function (event) {
   console.log('Event type: ' + event.type); // added, changed, or deleted
   console.log('Event path: ' + event.path); // The path of the modified file
});

除了 change 还支持  error、end、ready、nomatch等事件

Reloading Changes In The Browser

Reloading Changes In The Browser

Reloading Changes In The Browser

BrowserSync

LiveReload

Why Gulp

实现相同的功能

grunt.initConfig({
   less: {
      development: {
         files: {
            "build/tmp/app.css": "assets/app.less"
         }
      }
   },

   autoprefixer: {
      options: {
         browsers: ['last 2 version', 'ie 8', 'ie 9']
      },
      multiple_files: {
         expand: true,
         flatten: true,
         src: 'build/tmp/app.css',
         dest: 'build/'
      }
   }
});

grunt.loadNpmTasks('grunt-contrib-less');
grunt.loadNpmTasks('grunt-autoprefixer');

grunt.registerTask('css', ['less', 'autoprefixer']);

var gulp = require('gulp'),
   less = require('gulp-less'),
   autoprefix = require('gulp-autoprefixer');

gulp.task('css', function () {
   gulp.src('assets/app.less')
      .pipe(less())
      .pipe(autoprefix('last 2 version', 'ie 8', 'ie 9'))
      .pipe(gulp.dest('build'));
});

Why Gulp

实现相同的功能

grunt 读写文件频繁

https://gist.github.com/callumacrae/9231589