PS1 for git repositories

.bashrc

function branch_status {
  branch=`branch`
  [ -n "$branch" ] && echo "[$branch`dirty_status`] " || echo
}

function branch {
  git branch | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'
}

function dirty_status {
  git status --porcelain | (
      unset dirty deleted untracked newfile copied renamed
      while read line ; do
          case "${line//[[:space:]]/}" in
            @('M'|'UU')*)  dirty='!' ; ;;
            'D'*)          deleted='x' ; ;;
            '??'*)         untracked='?' ; ;;
            'A'*)          newfile='+' ; ;;
            'C'*)          copied='*' ; ;;
            'R'*)          renamed='>' ; ;;
          esac
      done
      bits="$dirty$deleted$untracked$newfile$copied$renamed"
      [ -n "$bits" ] && echo " $bits" || echo
  )
}

export PS1="\w \[\e[0;33m\]\`branch_status\`\[\e[0m\]\\$ "