gulpfile.js

var gulp = require('gulp');
var traceur = require('gulp-traceur');
var traceurOptions = require('./config').traceur;
var connect = require('gulp-connect');
var clean = require('gulp-clean');
var requirejs   = require('requirejs');
var rename = require("gulp-rename");
var es = require('event-stream');
var shell = require('gulp-shell')

gulp.task('clean', function(){
    gulp.src('./dist/**/*.*')
        .pipe(clean());
});

gulp.task('transpile', ['clean'], shell.task('node_modules/traceur/traceur --script src/main.js --out dist/transpiled-with-source-maps.js --sourcemap'));

gulp.task('concatenate', ['transpile'], function() {
    requirejs.optimize({
        baseUrl : 'src',
        mainConfigFile : 'src/runtime-config.js',
        out : 'dist/build.js',
        include: ['traceur', 'runtime-config'],
        findNestedDependencies: true,
        wrap: true,
        name: '../bower_components/almond/almond',
        preserveLicenseComments: false
    });
});

gulp.task('build', ['clean', 'concatenate'], function() {
    gulp.src('index-production.html')
        .pipe(rename("index.html"))
        .pipe(gulp.dest('dist'));
});

gulp.task('watch', function() {
  gulp.watch(path.src, ['transpile']);
});

gulp.task('serve', connect.server({
  root: [__dirname],
  port: 8000,
  open: true,
  livereload: false
}));