byobu git prompt

.promptrc

#!/bin/bash
#    modified from byobu's bashrc -- colorize the prompt
#    Copyright (C) 2014 Dustin Kirkland
#
#    Authors: Dustin Kirkland <[email protected]>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, version 3 of the License.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Ensure that we're in a tmux or screen session
case "$TERM" in
        xterm)
                # Try to ensure we have 256 colors
                export TERM="xterm-256color"
        ;;
esac

git_branch() {
  local branch=$(git rev-parse --abbrev-ref HEAD 2> /dev/null)
  [[ -n $branch ]] && echo -e "($branch)"
}

# Ensure that we're in bash, in a byobu environment
if [ -n "$BASH" ]; then
  byobu_prompt_status() { local e=$?; [ $e != 0 ] && echo -e "$e "; }
  [ -n "$BYOBU_CHARMAP" ] || BYOBU_CHARMAP=$(locale charmap 2>/dev/null || echo)
  byobu_prompt_symbol() {
    if [ "$USER" = "root" ]; then
                printf "%s" "#";
    elif [ "$BYOBU_DISTRO" = "Ubuntu" ]; then
      case "$BYOBU_CHARMAP" in
        "UTF-8")
          # MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET (U+27EB, Pe): [0m~_�
          printf "%s" "[0m~_�[0m~_�"
          ;;
        *)
          # Simple ASCII greater-than sign
          printf "%s" ">"
        ;;
      esac
    else
      printf "%s" "\$"
    fi
  }

  case "$BYOBU_DISTRO" in
    "Ubuntu")
      # Use Ubuntu colors (grey / aubergine / orange)
      PS1="${debian_chroot:+($debian_chroot)}\[\e[38;5;202m\]\$(byobu_prompt_status)\[\e[38;5;245m\]\u\[\e[00m\]@\[\e[38;5;172m\]\h\[\e[00m\]:\[\e[38;5;180m\]\w\[\e[00m\]\[\e[38;5;141m\]\$(git_branch)\[\e[00m\]\$(byobu_prompt_symbol) "
    ;;
    *)
      # Use nice colors (green / red / blue)
      PS1="${debian_chroot:+($debian_chroot)}\[\e[31m\]\$(byobu_prompt_status)\[\e[00;32m\]\u\[\e[0m\]@\[\e[00;31m\]\h\[\e[0m\]:\[\e[00;36m\]\w\[\e[0m\]\$(byobu_prompt_symbol) "
    ;;
  esac
fi

save as ~/.promptrc and add the following last in ~/.bashrc
[ -r /home/mab/.promptrc ] && . /home/mab/.promptrc #byobu-git-prompt#