View branch name in command prompt for git and hg repositories, as well as current applied patch queue for mercurial

bashrc

###################################################
# Command line prompt settings
###################################################
__git_hg_ps1 () {
  local b="$(git symbolic-ref HEAD 2>/dev/null)";
  if [ -n "$b" ]; then
    printf " [%s]" "${b##refs/heads/}";
  elif [ "$(hg root 2> /dev/null)" ]; then
    printf " [%s]" "$(hg branch)"
  fi
}

__hg_qtop_ps1 () {
  if [ "$(hg root 2> /dev/null)" ]; then
    NOPATCHES="no patches applied"
    QTOP="$(hg qtop)"
    if [ "$QTOP" == "$NOPATCHES" ]; then
      printf ""
    else
      printf " {%s}" "$(hg qtop)"
     fi
  fi
}

export CLICOLOR=1
export LSCOLORS=ExFxCxDxBxegedabagacad
# start a color block \[\e[0;36m\]
# end a color block \[\e[m\]
declare -x PS1='\[\e[0;36m\]\h\[\e[m\] \W\[\e[0;32m\]$(__git_hg_ps1)\[\e[m\]\[\e[0;34m\]$(__hg_qtop_ps1)\[\e[m\] $ '