[sh] show current branch in bash-prompt

[sh] git-bash-prompt

#!/bin/bash

## git bash-prompt

GIT_THEME_PROMPT_DIRTY='*'

function git_prompt_info() {
  ref=$(git symbolic-ref HEAD 2> /dev/null) || return
  echo -e "(${ref#refs/heads/}$(parse_git_dirty))"
}

function parse_git_dirty {
  if [[ -n $(git status -s 2> /dev/null |grep -v ^# | grep -v "working directory clean" ) ]]; then
	  echo -e "$GIT_THEME_PROMPT_DIRTY"
  else
	echo -e "$GIT_THEME_PROMPT_CLEAN"
  fi
}

# Tell ls to be colourful
export CLICOLOR=1
export LSCOLORS=Exfxcxdxbxegedabagacad

PS1="\[\033[1;33m\]\W\[\033[0m\] \[\033[1;32m\]\[\$(git_prompt_info)\]\[\033[0m\]$ "