add to the app tree

gistfile1.js

/* jshint node: true */
'use strict';
var path = require('path');
var pickFiles = require('broccoli-static-compiler');

module.exports = {
	name: 'lang-concat',
	treeFor: function(type) {
		if (type === 'app') {
			// Deferred aka Wrapped vendor files
			// We wrap these such that the app can 'require' them as needed
			// Theme Files
			var vendorJS = path.join(process.cwd(), 'vendor');
			var wrappedJS = pickFiles(vendorJS, {
				srcDir: 'wrapped',
				files: ['**/*.js'],
				destDir: '/vendor'
			});
			return wrappedJS;
		}
		return false;
	}
};