Git / Docker environment bash prompt

git_docker_env.sh

# add to .bashrc, .bash_profile, ~/.profile
git_docker_env() {
  branch=
  gitlabel="git."
  dockerlabel="docker."
  sep="| "
  if [ -d .git ]; then
    status=$(git status 2> /dev/null)
    branch="$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')"
    if [[ $( echo $status | grep "branch is ahead") ]]; then
      branch="$branch*"
    fi
    if [[ $( echo $status | grep "working tree clean") ]]; then
      branch="$gitlabel\033[32m$branch\033[m"
    else
      branch="$gitlabel\033[93m$branch\033[m";
    fi
  fi

  if ! [ -z "$DOCKER_MACHINE_NAME" ]; then dockenv="$dockerlabel\033[32m${DOCKER_MACHINE_NAME}\033[m"; fi
  if ! [ -z "$dockenv" ] && ! [ -z "$branch" ]; then dockenv=" $sep$dockenv"; fi
  if ! [ -z "$branch$dockenv" ]; then echo -e " $sep$branch$dockenv"; fi
}

PS1="\h:\W\$(git_docker_env) $ "