Colored Git prompts

bashrc.bash

# thanks from: http://aaroncrane.co.uk/2009/03/git_branch_prompt/
function find_git_branch {
  local dir=. head
  git_dir=${PWD}
  until [ "$dir" -ef / ]; do
    if [ -f "$dir/.git/HEAD" ]; then
      head=$(< "$dir/.git/HEAD")
      if [[ $head == ref:\ refs/heads/* ]]; then
        git_branch="${head#*/*/}"
      elif [[ $head != '' ]]; then
        git_branch='(detached)'
      else
        git_branch='(unknown)'
      fi
      git_root="${git_dir##*/}"
      git_loc="${PWD/${git_dir}}"

      #wish there was a way to do this not running all these commands
      if ! $(git diff-files --ignore-submodules --quiet) ; then
        #locally modified
        git_status=32
      elif ! $(git diff-index --cached --quiet HEAD --) ; then
        #committed, but not pushed
        git_status=33
      else
        git_status=36
      fi
      return
    fi
    git_dir="${git_dir%/*}"
    dir="../$dir"
  done
# exported variables
  git_status=36
  git_dir=''
  git_branch=''
  git_root=''
  git_loc=${PWD##*/}
}
export PROMPT_COMMAND="find_git_branch; $PROMPT_COMMAND"
export PS1="[\[\033[\${git_status}m\]\${git_branch}\[\033[0m\]]\[\033[1;34m\] \${git_root}\[\033[0m\]\${git_loc} $ "