It's a chef recipe
Install zsh package and use the oh-my-zsh plugin to configure zsh
You can define it by configure like :
[:oh_my_zsh][:users] = [{
:login => 'shingara',
:theme => 'rachel',
:plugins => ['gem', 'git', 'rails3', 'redis-cli', 'ruby']
}]
If you are behind firewall or proxy, also configure this :
[:oh_my_zsh][:repository] = "https://github.com/robbyrussell/oh-my-zsh.git"