npm install gulp --save-dev 

sudo npm install -g gulp

npm init .

npm install module-name -save

npm install module-name -save-dev 

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

//在项目根目录引入gulp和uglify插件
var gulp = require('gulp');
var uglify = require('gulp-uglify');

gulp.task('compress',function(){
  return gulp.src('script/*.js')
  .pipe(uglify())
  .pipe(gulp.dest('dist'));
});

npm install --save-dev gulp-uglify
npm install --save-dev gulp-rename

cd /Users/trigkit4/gulp-test

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

gulp.task('compress',function(){
  return gulp.src('script/*.js')
  .pipe(uglify())
  .pipe(rename('jquery.ui.min.js'))
  .pipe(gulp.dest('dist'));
});

// 载入外挂
var gulp = require('gulp'), 
  sass = require('gulp-ruby-sass'),
  autoprefixer = require('gulp-autoprefixer'),
  minifycss = require('gulp-minify-css'),
  jshint = require('gulp-jshint'),
  uglify = require('gulp-uglify'),
  imagemin = require('gulp-imagemin'),
  rename = require('gulp-rename'),
  clean = require('gulp-clean'),
  concat = require('gulp-concat'),
  notify = require('gulp-notify'),
  cache = require('gulp-cache'),
  livereload = require('gulp-livereload');
 
// 样式
gulp.task('styles', function() { 
 return gulp.src('src/styles/main.scss')
  .pipe(sass({ style: 'expanded', }))
  .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
  .pipe(gulp.dest('dist/styles'))
  .pipe(rename({ suffix: '.min' }))
  .pipe(minifycss())
  .pipe(gulp.dest('dist/styles'))
  .pipe(notify({ message: 'Styles task complete' }));
});
 
// 脚本
gulp.task('scripts', function() { 
 return gulp.src('src/scripts/**/*.js')
  .pipe(jshint('.jshintrc'))
  .pipe(jshint.reporter('default'))
  .pipe(concat('main.js'))
  .pipe(gulp.dest('dist/scripts'))
  .pipe(rename({ suffix: '.min' }))
  .pipe(uglify())
  .pipe(gulp.dest('dist/scripts'))
  .pipe(notify({ message: 'Scripts task complete' }));
});
 
// 图片
gulp.task('images', function() { 
 return gulp.src('src/images/**/*')
  .pipe(cache(imagemin({ optimizationLevel: 3, progressive: true, interlaced: true })))
  .pipe(gulp.dest('dist/images'))
  .pipe(notify({ message: 'Images task complete' }));
});
 
// 清理
gulp.task('clean', function() { 
 return gulp.src(['dist/styles', 'dist/scripts', 'dist/images'], {read: false})
  .pipe(clean());
});
 
// 预设任务
gulp.task('default', ['clean'], function() { 
  gulp.start('styles', 'scripts', 'images');
});
 
// 看守
gulp.task('watch', function() {
 
 // 看守所有.scss档
 gulp.watch('src/styles/**/*.scss', ['styles']);
 
 // 看守所有.js档
 gulp.watch('src/scripts/**/*.js', ['scripts']);
 
 // 看守所有图片档
 gulp.watch('src/images/**/*', ['images']);
 
 // 建立即时重整伺服器
 var server = livereload();
 
 // 看守所有位在 dist/ 目录下的档案，一旦有更动，便进行重整
 gulp.watch(['dist/**']).on('change', function(file) {
  server.changed(file.path);
 });
 
});

gulp.task('任务名称', function () {
  return gulp.src('文件路径')
    .pipe(...)
    .pipe(...)
    // 直到任务的最后一步
    .pipe(...);
});

var gulp = require('gulp');

var ghPages = require('gulp-gh-pages');



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

 return gulp.src('./dist/**/*')

  .pipe(ghPages());

});

var less = require('gulp-less');

var path = require('path');

 

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

 return gulp.src('./less/**/*.less')

  .pipe(less({

   paths: [ path.join(__dirname, 'less', 'includes') ]

  }))

  .pipe(gulp.dest('./public/css'));

});
gulp-live-server 插件：方便的，轻量级的服务器

var gulp = require('gulp');

 var gls = require('gulp-live-server');

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

 //1. serve with default settings

 var server = gls.static(); //equals to gls.static('public', 3000);

 server.start();



 //2. serve at custom port

 var server = gls.static('dist', 8888);

 server.start();



 //3. serve multi folders

 var server = gls.static(['dist', '.tmp']);

 server.start();



 //use gulp.watch to trigger server actions(notify, start or stop)

 gulp.watch(['static/**/*.css', 'static/**/*.html'], function (file) {

  server.notify.apply(server, [file]);

 });

});

$ npm install --save-dev gulp-load-plugins

{

  "dependencies": {

    "gulp-jshint": "*",

    "gulp-concat": "*"

  }

}

var gulp = require('gulp');

var gulpLoadPlugins = require('gulp-load-plugins');

var plugins = gulpLoadPlugins();
plugins.jshint = require('gulp-jshint');

plugins.concat = require('gulp-concat');

$ npm install --save-dev gulp-babel babel-preset-es2015

const gulp = require('gulp');
const babel = require('gulp-babel');

gulp.task('default', () => {
  return gulp.src('src/app.js')
    .pipe(babel({
      presets: ['es2015']
    }))
    .pipe(gulp.dest('dist'));
});