Inspired by TJ Holowaychuk's PS1

ps.sh

function git_branch {
  git rev-parse --abbrev-ref HEAD 2> /dev/null | sed -e 's/\(.*\)/\ \(\1\)/'
}

PS1="\n  ∂\[\e[00;30m\] \[\e[0m\]\[\e[00;34m\][\[\e[0m\]\[\e[00;30m\]\W\[\e[0m\]\[\e[00;34m\]]\[\e[0m\]\$(git_branch)\[\e[00;30m\]:\[\e[0m\] "
PS2="    | "