My byobu prompt

.promptrc

#!/bin/bash
#    modified from byobu's bashrc -- colorize the prompt
#    Copyright (C) 2014 Dustin Kirkland
#
#    Authors: Dustin Kirkland <kirkland@byobu.co>
#
#    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)
  if [[ -n $branch ]]; then
    echo -e " «$branch» "
  fi
}

# 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)
  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\[\e[00m\] \[\e[38;5;141m\]\$(git_branch)\[\e[00m\]\[\e[38;5;5m\]\w\[\e[00m\]: "
      export GREP_COLORS="ms=01;38;5;202:mc=01;31:sl=:cx=:fn=01;38;5;132:ln=32:bn=32:se=00;38;5;242"
      export LESS_TERMCAP_mb=$(printf '\e[01;31m')       # enter blinking mode – red
      export LESS_TERMCAP_md=$(printf '\e[01;38;5;180m') # enter double-bright mode – bold light orange
      export LESS_TERMCAP_me=$(printf '\e[0m')           # turn off all appearance modes (mb, md, so, us)
      export LESS_TERMCAP_se=$(printf '\e[0m')           # leave standout mode
      export LESS_TERMCAP_so=$(printf '\e[03;38;5;202m') # enter standout mode – orange background highlight (or italics)
      export LESS_TERMCAP_ue=$(printf '\e[0m')           # leave underline mode
      export LESS_TERMCAP_us=$(printf '\e[04;38;5;139m') # enter underline mode – underline aubergine
    ;;
    *)
      # Use nice colors (green / red / blue)
      PS1="${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