Installing rbenv on OSX / ZSH

I recently switched from using rvm to using rbenv for managing different ruby versions.
The install is relatively straightforward, but a few caveats when using ZSH.

brew update

brew install rbenv

rbenv install 1.9.3-p327

ruby --version # should show the installed version

which ruby # should point to ~/.rbenv/shims/ruby

In the README, it states to add some statements to your bash_profile, but if you are using ZSH, to put it into .zshenv, this however did not work for me, so instead, stick the following into your .zshrc

if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi

Be sure that $HOME/.rbenv/bin is prepended to your $PATH

Simple as.