Connect middleware to run the RequireJS optimizer

gistfile1.txt

module.exports = function(baseUrl, optimize, fileList) {
  var fileMap = {};
  //probably should do a regexp match rather than pass in a list?
	fileList.forEach(function (file) {
		fileMap[file] = true;
	});

	var requireJS = require('requirejs');
	return function(req, res, next) {
		var file = fileMap[req.path];

		if (!file) {
			next();
			return;
		}

		if (file.length) {
			res.type('application/javascript').send(file);
			return;
		}

		var requireJSConfig = {
			baseUrl: baseUrl,
			logLevel: 0,
			name: req.path.slice(1, -3),
			out: function(content) {
				fileMap[req.path] = content;
				res.type('application/javascript').send(content);
			}
		};

		if (optimize) {
		    requireJSConfig.optimize = optimize;
		}

		requireJS.optimize(requireJSConfig, function() {
			// result goes to 'out' function
		}, function(err) {
			next(err);
		});
	};
}