gistfile1.txt

sudo port install git-core +bash_completion

if [ -f /opt/local/etc/bash_completion ]; then
  . /opt/local/etc/bash_completion
fi


GIT_PS1_SHOWDIRTYSTATE=true
PS1='\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;33m\]\w\[\033[00m\]\[\033[01;31m\]$(__git_ps1 " {%s}")\[\033[00m\]\$ '

brew:
Install homebrew
Install Git and bash-completion: brew install git bash-completion
Add bash-completion to your .bash_profile:
if [ -f `brew --prefix`/etc/bash_completion ]; then
  . `brew --prefix`/etc/bash_completion
fi