react-es6-gulpfile.js

var gulp = require('gulp');
var babel = require('gulp-babel');
var babelify = require('babelify');
var uglify = require('gulp-uglify');
var streamify = require('gulp-streamify');
var browserify = require('browserify');
var source = require('vinyl-source-stream');
var del = require('del');
var vinylPaths = require('vinyl-paths');

gulp.task('default', ['build', 'modules']);

gulp.task('watch', function(){
    gulp.watch(['src/*.js', 'src/**/*.js'], ['default']);
});

gulp.task('build', function () {
  return gulp.src(['src/*.js', 'src/**/*.js'])
    .pipe(babel())
    .pipe(gulp.dest('tmp'));
});

gulp.task('modules',['build'], function() {
    browserify({
      entries: './tmp/app.js',
      debug: true
    })
    .transform(babelify)
    .bundle()
    .pipe(source('bundle.js'))
    //.pipe(streamify(uglify()))
    .pipe(gulp.dest('./dist'));
});

gulp.task('clean', function() {
    del(['tmp/']);
});