Get up and running with ruby

gistfile1.txt

0: install open source gcc "standalone" using OSX installer:
  https://github.com/kennethreitz/osx-gcc-installer

1: install homebrew
  /usr/bin/ruby -e "$(curl -fsSL https://raw.github.com/gist/323731)"

2: install rvm
  bash < <(curl -s https://raw.github.com/wayneeseguin/rvm/master/binscripts/rvm-installer)

MAKE SURE you follow the instructions about putting stuff in ~/.bashrc or ~/.bash_profile

Now, open a new terminal and:

3: install ruby 1.9.3
  rvm install 1.9.3

(this should install p0, if not, your rvm is out of date and I'm lost)

Now, set up 1.9.3 to run default:
  rvm --default 1.9.3

4: install bundler
  rvm use 1.9.3
  gem install bundler --pre

5: install mysql
  brew install mysql

FOLLOW INSTRUCTIONS about auto-starting (run the commands)

  brew link mysql

6: install postgresql
  brew install postgresql

FOLLOW INSTRUCTIONS about auto-starting (run the commands)

  brew link postgresql 
 

Enjoy!