Bash prompt that indicates current git branch

gistfile1.sh

# This depends on git bash completion:
#  https://github.com/git/git/blob/master/contrib/completion/git-completion.bash


BLACK="\[$(tput setaf 0)\\"
RED="\[$(tput setaf 1)\]"
GREEN="\[$(tput setaf 2)\]"
LIME="\[$(tput setaf 190)\]"
YELLOW="\[$(tput setaf 3)\]"
POWDER_BLUE="\[$(tput setaf 153)\]"
BLUE="\[$(tput setaf 4)\]"
MAGENTA="\[$(tput setaf 5)\]"
CYAN="\{$(tput setaf 6)\]"
WHITE="\[$(tput setaf 7)\]"
BRIGHT="\[$(tput bold)\]"
NORMAL="\[$(tput sgr0)\]"
UNDERLINE="\[$(tput smul)\]"

export GIT_PS1_SHOWUPSTREAM="auto"

function parse_git_branch {
   __git_ps1 "(%s)"
   # this is really not necessary since __git_ps1 does a much better job than my own crude shell scripting
   # git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}

# default prompt
PS1_DEFAULT="${YELLOW}me${NORMAL}@${RED}\h${NORMAL}:${BLUE}\w${NORMAL}"

function ps1 {
    # this swaps between a git prompt and default (above) based on PWD
    # set it to match where you keep your git repositories or just leave it always enabled
    # __git_ps1 handles it gracefully but I wanted to differentiate between git and non-git locations.
    if [[ "${PWD}" == /src/*/* ]]; then
        PS1="$PS1_DEFAULT ${RED}\$(parse_git_branch)${NORMAL}"
    else
        PS1="$PS1_DEFAULT"
    fi
    PS1="$PS1 ${YELLOW}↪${NORMAL} "
}

PROMPT_COMMAND="ps1; $PROMPT_COMMAND"