UNIX Prompt setup with user@host, working directory, and git branch, git dirty, and git stash

prompt.sh

function parse_git_dirty {
  git symbolic-ref HEAD > /dev/null 2>&1 || return
  git status 2> /dev/null | grep -q "nothing to commit" || echo "[d]"
}

function parse_git_stash {
  git symbolic-ref HEAD > /dev/null 2>&1 || return
  [[ $(git stash list 2> /dev/null | tail -n1) != "" ]] && echo "[s]"
}

function parse_git_branch {
  ref=$(git symbolic-ref HEAD 2> /dev/null) || return
  echo " ${ref#refs/heads/}"
}

case $TERM in
  xterm*)
    #TITLEBAR='\[\e]0;\w\a\]'
    # turn off titlebar temporarily, doesn't always work well
    TITLEBAR=''
    ;;
  *)
    TITLEBAR=''
    ;;
esac

if [ "$TERM" != "dumb" ]; then
  GRN="\[\e[32m\]"
  YLW="\[\e[33m\]"
  BLU="\[\e[1;34m\]"
  PNK="\[\e[35m\]"
  NOc="\[\033[0m\]"

  PS1="${TITLEBAR}\n$GRN\u$NOc@$GRN\h $YLW\w$BLU\$(parse_git_branch)$PNK\$(parse_git_dirty)\$(parse_git_stash) $YLW\$$NOc "
fi