gulp

npm install gulp -g
npm install gulp --save-dev
npm install gulp-plugins

gulp API

gulp.task

gulp.src

gulp.dest

gulp.watch

gulp demo

1.gulp require plugins

2.gulp.task(name,function(){

　　return gulp.src(path)

     .pipe(todo)

     .pipe(gulp.dest(path))//output1

     .pipe(todo)

     .pipe(gulp.dest(path))//output2

   })