Display Git Branch or Tag Names in your Bash Prompt

.bashrc_git

# Replace your PS1, inside ~/.bashrc for this:
# source ~/.bashrc_git
# PS1='\w\[\033[0;32m\]$(parse_git_branch_or_tag)\[\033[00m\]: '

parse_git_branch () {
  git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}

parse_git_tag () {
  git describe --tags 2> /dev/null
}

parse_git_branch_or_tag() {
  local OUT="$(parse_git_branch)"
  if [ "$OUT" == " ((no branch))" ]; then
    OUT=" ($(parse_git_tag))";
  fi
  echo "$OUT"
}