Gulpfile config to create a pipe that wraps the bootstrap js files with async module definitions, with jQuery AMD

gistfile1.js

var through2  = require('through2');
var path      = require('path');
var gulp      = require('gulp');

gulp.task('bootstrap', function () {
	return gulp.src('./node_modules/bootstrap/js/*.js')
		.pipe(through2.obj(function transform (file, enc, next) {
			if (file.isNull()) {
				this.push(file); // pass along
				return next();
			}

			var basename = path.basename(file.path);

			var src = file.contents.toString('utf8');

			var compiled;
			if (basename === 'transition.js') {
				compiled = 'define([\'jquery/jquery\'], function (jQuery) {\n' + src + '\n\nreturn jQuery;\n});\n';
			} else {
				compiled = 'define([\'jquery/jquery\', \'bootstrap/transition\'], function (jQuery) {\n' + src + '\n\nreturn jQuery;\n});\n';
			}

			file.contents = new Buffer(compiled);
			this.push(file);

			next();
		}))
		.pipe(gulp.dest('./public/vendor/bootstrap-amd/'));
});