bashrc file which tracks git status in my prompt

.bashrc

# .bashrc

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

# Source global definitions
if [ -f /etc/bashrc ]; then
	. /etc/bashrc
fi

source ~/.alias
export GREP_OPTIONS='--color=auto'

norm="\033[0;39m";
grey="\033[1;30m";
green="\033[1;32m";
brown="\033[0;33m";
yellow="\033[1;33m";
blue="\033[1;34m";
cyan="\033[1;36m";
red="\033[1;31m";
purple='\e[0;35m' 
yellow_reversed='\e[0;30m\e[43m'

        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="\[\e[0m\]"

hcol=$blue;
ucol=$grey;
rcol=$red;

export VISUAL=vim
export EDITOR=vim
export PATH=$PATH:~/bin
export JAVA_HOME=/opt/sun-java2-6.0/
export MAVEN_OPTS="-Xms512m -Xmx1024m -XX:PermSize=128m -XX:MaxPermSize=256m"
export GITUSER=nickboldt

#####################################################################################

# based on https://gist.github.com/47267
function parse_git_branch {
  git_status=""
  gitdir=`git rev-parse --git-dir 2> /dev/null`
  #git rev-parse --git-dir &> /dev/null
  if [[ -d ${gitdir} ]] && [[ ${gitdir/.git/} != ${gitdir} ]]; then git_status="$(git status 2> /dev/null)"; fi
  branch_pattern="^# On branch ([^${IFS}]*)"
  remote_pattern="# Your branch is (.*) of"
  diverge_pattern="# Your branch and (.*) have diverged"
  newfile="new file:"
  untracked="Untracked file"
  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
  elif [[ ${git_status} =~ ${diverge_pattern} ]]; then
    remote="${YELLOW}↕ "
  fi
  if [[ ${git_status} =~ ${newfile} ]]; then
    remote="${remote}${YELLOW}A "
  fi
  if [[ ${git_status} =~ ${untracked} ]]; then
    remote="${remote}${purple}? "
  fi
  if [[ ${git_status} =~ ${branch_pattern} ]]; then
    branch=${BASH_REMATCH[1]}
    if [[ $TOPIC ]]; then
      if [[ ${branch} == ${TOPIC} ]]; then # we're in the topic branch
        echo " ${yellow_reversed}${branch}${norm} = ${GREEN}${TOPIC} ${remote}${state}"
      else # we're in the origin branch, not the topic branch
        echo " ${yellow_reversed}${branch}${norm} ⇐ ${YELLOW}${TOPIC} ${remote}${state}"
      fi
    else
      echo -n " ${yellow_reversed}${branch}${norm}" 
      if [[ -f ${gitdir}/svn/.metadata ]]; then
        PWD=`pwd`
        if [[ ${PWD/\/target/} = ${PWD} ]]; then
          # echo " ${BLUE}`git svn info 2> /dev/null | grep URL | sed -e \"s/URL: //g\"`${norm}"
          echo " ${BLUE}`cat ${gitdir}/svn/.metadata | grep reposRoot | sed -e \"s/.\+reposRoot = //g\"`${norm}"
        else
          echo -n " ${BLUE}`cat ${gitdir}/svn/.metadata | grep reposRoot | sed -e \"s/.\+reposRoot = //g\"`${norm}"
          echo " ... ${BLUE}target${PWD##*/target}"
        fi
      else
        echo " ${RED}! NO \\\${TOPIC} SET ${remote}${state}"
      fi
    fi
  fi
}

function timestamp() {
  echo -ne "[$(date +%H:%M:%S)]\033]0; ${PWD}\007"
}

function prompt_func() {
  previous_return_value=$?;
  if [ $UID -eq 0 ]; then # root
    prompt="$(timestamp) $rcol\u$norm@$hcol\h$norm:\w\[$norm\]$(parse_git_branch)\n$RED#$norm";
  else
    prompt="$(timestamp) $ucol\u$norm@$hcol\h$norm:\w\[$norm\]$(parse_git_branch)\n$ucol\$$norm";
  fi
  if test $previous_return_value -eq 0
  then
      PS1="${prompt}➔ "
  else
      PS1="${prompt}${RED}➔${COLOR_NONE} "
  fi
}

PROMPT_COMMAND=prompt_func

See also:

https://gist.github.com/4047607
https://gist.github.com/4047616