This Boxen module is now deprecated. The advised method for installing applications with Boxen is to now use homebrew-cask. Add the following to your manifest to install Github using brewcask:
package { 'github-desktop': provider => 'brewcask' }
GitHub for Mac - The easiest way to share your code with GitHub
See mac.github.com for more.
include github_for_mac
Write code. Run script/cibuild
to test it. Check the script
directory for other useful tools.