Registering ExtJS controllers automatically with Embedded Ruby

gistfile1.js

//Whenever I start a new story there comes the excessive boilerplating that tags along, a series of mini steps 
//to get you going, one such step is registering your ExtJs controller on App.js, it looks like this:

Ext.application
    name: 'Fidget'
    autoCreateViewport: true
    controllers: [
        'YourController',
        'HundredsOfOtherControllers'
    ]

//now given my lazyness has caught up with me today, I decided it was time to automate that step
//using Embedded Ruby (erb)

//File: App.js.coffee.erb
Ext.application
    name: 'Fidget'
    autoCreateViewport: true
    controllers: [
        <%
            path = 'app/assets/javascripts/controller'
            root = "Fidget.controller."
            controllers = Dir.glob("#{path}/**/*")
                .select { |file| File.file? file and file.end_with? '.js' }
                .map { |file| File.read(file) }
                .map { |file| file.match(/#{root}(?<name>[\w\.]+)/)[:name] }
                .map { |file| "'#{file}'" }
                .join(",")
        %>
        <%= controllers %>
    ]

//Now, that controllers array will get filled with all the 129 controllers the app has as of today