gulp for react 0.14, browserify, watchify, babelify, uglify

gulpfile.js

'use strict';

var del = require('del');
var gulp = require('gulp');
var browserify = require('browserify');
var source = require('vinyl-source-stream');
var babelify = require('babelify');
var watchify = require('watchify');
var uglify = require('gulp-uglify');
var buffer = require('vinyl-buffer');

var paths = {
  src: '.',
  des: './build'
};


gulp.task('clean', function(done) {
  del([paths.des], done);
});

gulp.task('watch-and-bundle', function () {
  var b = watchify(browserify('./main.js'));

  var bundle = function(){
    console.log('bundle..');
    b.transform(babelify)
        .bundle()
        .pipe(source('bundle.js'))
        .pipe(buffer())
        .pipe(uglify())
        .pipe(gulp.dest(paths.des));
  };

  b.on('update', bundle);
  return bundle();
});

// command line: browserify -t babelify main.js -o bundle.js
gulp.task('bundle', function () {
  browserify('./main.js')
    .transform(babelify)
    .bundle()
    .pipe(source('bundle.js'))
    .pipe(gulp.dest(paths.des));
});

gulp.task('default', ['clean', 'bundle']);

package.json

{
  "name": "try-react-0.14",
  "version": "1.0.0",
  "description": "",
  "main": "main.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "babelify": "^6.3.0",
    "browserify": "^11.2.0",
    "del": "^2.0.2",
    "gulp": "^3.9.0",
    "gulp-uglify": "^1.4.2",
    "react": "^0.14.0",
    "react-dom": "^0.14.0",
    "vinyl-buffer": "^1.0.0",
    "vinyl-source-stream": "^1.1.0",
    "watchify": "^3.4.0"
  }
}