在Mac OS上安装使用Node.js的项目自动化构建工具Gulp

brew install nodejs

npm install --global gulp

npm install --save-dev gulp

./gulpfile.js
./public/
./public/index.html

npm install --save-dev gulp gulp-connect

var gulp = require('gulp'),
    connect = require('gulp-connect')

  gulp.task('server', function() {
    connect.server({
      root: 'public',
      livereload: true
    })
  })

  gulp.task('html', function() {
    gulp.src('./public/*.html').pipe(connect.reload())
  })

  gulp.task('watch', function() {
    gulp.watch(['./public/*.html'], ['html'])
  })

  gulp.task('default', ['watch', 'server'])

sass: { 
 dist: {
  options: {
   style: 'expanded'
  },
  files: {
   'dist/assets/css/main.css': 'src/styles/main.scss',
  }
 }
},

autoprefixer: { 
 dist: {
  options: {
   browsers: [
    'last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'
   ]
  },
  src: 'dist/assets/css/main.css',
  dest: 'dist/assets/css/main.css'
 }
},

grunt.registerTask('styles', ['sass', 'autoprefixer']); 

gulp.task('sass', function() { 
 return gulp.src('src/styles/main.scss')
  .pipe(sass({ style: 'compressed' }))
  .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
  .pipe(gulp.dest('dist/assets/css'))
});