gulpfile.js

// ## Globals
var argv        = require('minimist')(process.argv.slice(2));
var browserify  = require('browserify');
var buffer      = require('vinyl-buffer');
var changed     = require('gulp-changed');
var coffeeify   = require('coffeeify');
var concat      = require('gulp-concat');
var gulp        = require('gulp');
var gulpif      = require('gulp-if');
var jshint      = require('gulp-jshint');
var lazypipe    = require('lazypipe');
var merge       = require('merge-stream');
var plumber     = require('gulp-plumber');
var rev         = require('gulp-rev');
var runSequence = require('run-sequence');
var source      = require('vinyl-source-stream');
var transform   = require('vinyl-transform');
var uglify      = require('gulp-uglify');

var manifest    = require('asset-builder')('./assets/manifest.json');
var path        = manifest.paths;
var config      = manifest.config || {};
var globs       = manifest.globs;
var project     = manifest.getProjectGlobs();

var enabled = {
	rev: argv.production,
	failJSHint: argv.production,
	stripJSDebug: argv.production
};

var revManifest = path.dist + 'assets.json';

var writeToManifest = function(directory){
	return lazypipe()
		.pipe(gulp.dest, path.dist + directory)
		.pipe(rev.manifest, revManifest, {
			base: path.dist,
			merge: true
		})
		.pipe(gulp.dest, path.dist)();
};

gulp.task('scripts', ['jshint'], function(){
	var merged = merge();

	manifest.forEachDependency('js', function(dep){

		var b = browserify({
			entries: dep.globs,
			debug: true,
			transform: config.browserify.transform,
			extensions: config.browserify.extensions
		});

		merged.add(
			b.bundle()
			.on('error', function (err) {
				console.log(err.toString());
				this.emit("end");
			})
			.pipe(source(dep.name))
			.pipe(buffer())
		)
		
	});

	return merged.pipe(writeToManifest('scripts'));
});

gulp.task('jshint', function(){
	return gulp.src(['bower.json', 'gulpfile.js'].concat(project.js))
		.pipe(jshint())
		.pipe(jshint.reporter('jshint-stylish'))
		.pipe(gulpif(enabled.failJSHint, jshint.reporter('fail')));
});

gulp.task('clean', require('del').bind(null, [path.dist]));

gulp.task('watch', function() {
	gulp.watch([path.source + 'scripts/**/*'], ['jshint', 'scripts']);
	gulp.watch(['bower.json', 'assets/manifest.json'], ['build']);
});

gulp.task('build', function(callback) {
	runSequence( 'scripts', callback);
});

gulp.task('default', ['clean'], function() {
	gulp.start('build');
});