ruby -e "$(curl -fsSkL raw.github.com/mxcl/homebrew/go)"

brew install git

curl -L https://get.rvm.io | bash -s stable

rvm install 1.9.3
rvm gemset use global
gem install rubygems-bundler
gem install bundler
rvm use 1.9.3@rails3 --default --create
gem install rails