Bash prompt for git branches

.bashrc

#  Note that a variable may require special treatment
#+ if it will be exported.

DARKGRAY='\e[1;30m'
LIGHTRED='\e[0;31m'
GREEN='\e[32m'
YELLOW='\e[1;33m'
LIGHTBLUE='\e[1;34m'
NC='\e[m'
COLOR_OFF="\[\e[0m\]"

function prompt_func(){
pgd=`git rev-parse --show-toplevel 2>/dev/null`
branch_pattern="\* ([^$IFS]*)"
if [[ -d $pgd"/.git" && "$(git branch --no-color 2> /dev/null)" =~ $branch_pattern ]]; then
  branch="${BASH_REMATCH[1]}"
  if [ "$branch" = "(no" ]; then
    branch="Detached Head"
  fi
  PS1="[\[\033[32m\]\w$NC:$LIGHTRED$branch$COLOR_OFF]\[\033[0m\]\n\[\033[1;36m\]\u\[\033[1;33m\]-> \[\033[0m\]"
else
  PS1="[\[\033[32m\]\w$NC]\[\033[0m\]\n\[\033[1;36m\]\u\[\033[1;33m\]-> \[\033[0m\]"
fi
#PS1+=":$LIGHTBLUE$branch$COLOR_OFF"
}