PS1: git branch color

c_cyan=`tput setaf 6`
c_red=`tput setaf 1`
c_green=`tput setaf 2`
c_sgr0=`tput sgr0`
c_pink=`tput setaf 5`
parse_git_branch ()
{
    git rev-list -n 1 --all >/dev/null 2>&1
    retcode=$?
    if [ $retcode -eq 129 ]; then
   	echo " (EMPTY)"
    elif [ $retcode -eq 128 ]; then
	 return 0
    else
    	git rev-parse --git-dir >/dev/null 2>&1
        remote=""
	git_status="$(git status 2> /dev/null)"
	if [ $? -eq 128 ]; then
		echo " (!GIT_DIR!)"
	else
		branch=`git rev-parse --abbrev-ref HEAD`
		git config --get branch.$branch.remote >/dev/null 2>&1
		if [ $? -eq 0 ]; then
			#its a tracking branch
			behind=`git log ..@{u} --pretty=oneline | wc -l | sed -e 's/[ \t]*//g'`
			ahead=`git log @{u}.. --pretty=oneline | wc -l | sed -e 's/[ \t]*//g'`
			diverged=`git log @{u}... --pretty=oneline | wc -l | sed -e 's/[ \t]*//g'`

			if [ $diverged -ne 0 ]; then
				if [ "$behind" == "$diverged" ]; then
         				#remote=" [$behind]↓"
					remote="↓"
				elif [ "$ahead" == "$diverged" ]; then
        	    			#remote=" [$ahead]
					remote="↑"
				else
	        	  		remote="↕"
					#remote=" [$behind]↓  [$ahead]↑"
				fi
			fi
		fi
		echo " (${branch}${remote})"
	fi
     fi
}
branch_color ()
{
    color=""
    git rev-parse --git-dir >/dev/null 2>&1
    if [ $? -eq 0 ]; then
	git status --untracked-files=no --porcelain >/dev/null 2>&1
	if [ $? -eq 128 ]; then
		color=${c_pink}
	elif [ -z "$(git status --untracked-files=no --porcelain)" ]; then
		color="${c_green}"
	else
            	color=${c_red}
	fi
    else
        return 0
    fi
    echo -ne $color
}

export PS1='\[\033[1;32m\]\u\[\033[0m\]@\[\033[1;36m\]\h\[\033[0m\] \W\[$(branch_color)\]$(parse_git_branch)\[\033[0m\] \$ '