I really love Octopress (http://octopress.org/). The only problem is setting up a functional Ruby environment. I always seem to spend more time with Ruby than the project itself. So I built a vagrant/chef setup for it. Before I go too far...I assume you have the following setup (this is a non-trivial task, thats covered better elsewhere): Virtualbox, Vagrant, Vagrant Plugins (vbguest, omnibus, berkshelf)
Ok let's jump into some code for the Berkshelf:
cookbook "dmg", "<= 2.0.6"
cookbook "git"
cookbook "curl"
cookbook "rvm", git: 'https://github.com/fnichol/chef-rvm.git'