show branch or tag in bash

bash_PSI.sh

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
}

RED="\[\033[0;31m\]"
YELLOW="\[\033[0;33m\]"
GREEN="\[\033[0;32m\]"
NO_COLOUR="\[\033[0m\]"

PS1="$GREEN\u$NO_COLOUR:\w$YELLOW\$(parse_git_branch_or_tag)$NO_COLOUR\$ "