Git status on bash prompt

.bashrc

# PS1 customization

NC='\001\033[0m\002'

RED='\001\033[00;31m\002'
GREEN='\001\033[00;32m\002'
YELLOW='\001\033[00;33m\002'
BLUE='\001\033[00;34m\002'
PURPLE='\001\033[00;35m\002'
CYAN='\001\033[00;36m\002'
WHITE='\001\033[00;37m\002'

LRED='\001\033[01;31m\002'
LGREEN='\001\033[01;32m\002'
LYELLOW='\001\033[01;33m\002'
LBLUE='\001\033[01;34m\002'
LPURPLE='\001\033[01;35m\002'
LCYAN='\001\033[01;36m\002'
WHITE2='\001\033[01;37m\002'

# get current branch in git repo
function parse_git_branch() {
	BRANCH=`git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'`
	if [ ! "${BRANCH}" == "" ]
	then
		STAT=`parse_git_dirty`
		echo -en "${WHITE}[${BRANCH}${NC}${STAT}${WHITE}]${NC}"
	else
		echo ""
	fi
}

# get current status of git repo
function parse_git_dirty {
	status=`git status 2>&1 | tee`
	dirty=`echo -n "${status}" 2> /dev/null | grep "modified:" &> /dev/null; echo "$?"`
	untracked=`echo -n "${status}" 2> /dev/null | grep "Untracked files" &> /dev/null; echo "$?"`
	ahead=`echo -n "${status}" 2> /dev/null | grep "Your branch is ahead of" &> /dev/null; echo "$?"`
	newfile=`echo -n "${status}" 2> /dev/null | grep "new file:" &> /dev/null; echo "$?"`
	renamed=`echo -n "${status}" 2> /dev/null | grep "renamed:" &> /dev/null; echo "$?"`
	deleted=`echo -n "${status}" 2> /dev/null | grep "deleted:" &> /dev/null; echo "$?"`
	bits=''
	if [ "${renamed}" == "0" ]; then
		bits="\e[33m>\e[m${bits}"
	fi
	if [ "${ahead}" == "0" ]; then # magenta
		bits="${PURPLE}**${NC}${bits}"
	fi
	if [ "${newfile}" == "0" ]; then # green 
		bits="${GREEN}+${NC}${bits}"
	fi
	if [ "${untracked}" == "0" ]; then # cyan
		bits="${CYAN}?${NC}${bits}"
	fi
	if [ "${deleted}" == "0" ]; then # red
		bits="${RED}x${NC}${bits}"
	fi
	if [ "${dirty}" == "0" ]; then
		bits="${LGREEN}!${NC}${bits}"
	fi
	if [ ! "${bits}" == "" ]; then
		echo -en " ${bits}"
	else
		echo ""
	fi
}

# prompt like:
# user@host /absolute/path [branch **]$
# change de configuration and color as you want
export PS1="${GREEN}\u@\h${NC} ${BLUE}\w${NC} \`parse_git_branch\`${BLUE}\\$ ${NC}"

At this to ~/.bashrc and do >$ source ~/.bashrc