make git prompt more useful

bashrc.sh

        RED="\[\033[0;31m\]"
     YELLOW="\[\033[0;33m\]"
      GREEN="\[\033[0;32m\]"
       BLUE="\[\033[0;34m\]"
  LIGHT_RED="\[\033[1;31m\]"
LIGHT_GREEN="\[\033[1;32m\]"
      WHITE="\[\033[1;37m\]"
 LIGHT_GRAY="\[\033[0;37m\]"
 COLOR_NONE="\[\e[0m\]"

function parse_git_branch {

  git rev-parse --git-dir &> /dev/null
  git_status="$(git status 2> /dev/null)"
  branch_pattern="^# On branch ([^${IFS}]*)"
  no_branch_pattern="^# Not currently on any branch"
  remote_pattern="# Your branch is (.*) of"
  diverge_pattern="# Your branch and (.*) have diverged"
  if [[ ! ${git_status}} =~ "working directory clean" ]]; then
    state="${RED}⚡"
  fi
  # add an else if or two here if you want to get more specific
  if [[ ${git_status} =~ ${remote_pattern} ]]; then
    if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
      remote="${YELLOW}↑"
    else
      remote="${YELLOW}↓"
    fi
  fi
  if [[ ${git_status} =~ ${diverge_pattern} ]]; then
    remote="${YELLOW}↕"
  fi
  if [[ ${git_status} =~ ${branch_pattern} ]]; then
    branch=${BASH_REMATCH[1]}
    echo " (${branch})${remote}${state}"
  elif [[ ${git_status} =~ ${no_branch_pattern} ]]; then
    echo " (no branch)"
  fi
}

function prompt_func() {
    previous_return_value=$?;    
    prompt="${TITLEBAR}${BLUE}[${LIGHT_GRAY}\w${GREEN}$(parse_git_branch)${BLUE}]${COLOR_NONE} "
    if test $previous_return_value -eq 0
    then
        PS1="${prompt}➔ "
    else
        PS1="${prompt}${RED}➔${COLOR_NONE} "
    fi
}

PROMPT_COMMAND=prompt_func
PATH=/Applications/MAMP/Library/bin:/Applications/MAMP/bin/php5.3/:~/Sites/cakephp/lib/Cake/Console:~/Sites/cakephp/cake/console:~/local/node/bin:$PATH
export NODE_PATH=$HOME/local/node:$HOME/local/node/lib/node_modules

##
# Your previous /Users/Dean/.profile file was backed up as /Users/Dean/.profile.macports-saved_2012-02-19_at_19:52:00
##

# MacPorts Installer addition on 2012-02-19_at_19:52:00: adding an appropriate PATH variable for use with MacPorts.
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
# Finished adapting your PATH environment variable for use with MacPorts.