Bash prompt to show current git status and branch

.bash_profile

#Install git-core +bash_completion
#sudo port install git-core +bash_completion
#paste this into your .bash_profile
#customize the PS1 variable as desired

GIT_PS1_SHOWUPSTREAM="verbose"

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

source /opt/local/share/doc/git-core/contrib/completion/git-prompt.sh

function parse_git_dirty {
      git diff --quiet HEAD &>/dev/null
        [[ $? == 1 ]] && echo "⚡"
}
function parse_git_branch {
      local branch=$(__git_ps1 "%s")
        [[ $branch ]] && echo "[$branch$(parse_git_dirty)]"
}
export PS1="$GREEN\u@\h $RED\w $YELLOW\$(parse_git_branch)\[\033[00m\] \$"