Show git status in bash prompt

gistfile1.bat

git_branch()
{
  # Check if we are on an untrached branch
  ISUNTRACKED=$(git branch 2>/dev/null | grep '* (no branch)' | wc -l)

  # Checks the branch name
  BRANCH=$(git branch 2>/dev/null | grep '*' | awk '{ print $2 }')
  if [ "x$BRANCH" != "x" ]; then
      if [ "x$ISUNTRACKED" != "x0" ]; then
          echo -ne ':\033[31;1mUNTRACKED('$(git log --oneline -1 | awk '{ print $1 }')')\033[0m'
      else
          echo -ne ':\033[36;1m'$BRANCH'\033[00m'
      fi

      # Checks the relative directory to the
      # git repository
      DIR=`pwd`
      while [ "x$DIR" != "x/" ]; do
        if [ -d "$DIR/.git" ]; then
          CWD=`pwd`
          DIR="${CWD/$DIR/}"
          if [ "x$DIR" != "x" ]; then
            echo -ne '\033[30;1m('$DIR')\033[0m'
          fi
          break
        fi
        DIR=`dirname $DIR`
      done

      TAGS=
      if [ "x$ISUNTRACKED" != "x" ]; then
          HASORIG=$(git branch -r | grep origin/$BRANCH | wc -l)
          if [ "x$HASORIG" != 'x0' ]; then
              DIFF=$(git log --oneline origin/$BRANCH..HEAD | wc -l)

              if [ "x$DIFF" != "x0" ]; then
                  TAGS="$TAGS unpushed:$DIFF"
              fi
          fi
      fi

      # Check if repo is dirty
      DIFF=$(git status --porcelain | wc -l)
      if [ "x$DIFF" != "x0" ]; then
          TAGS="$TAGS modified:$(git status --porcelain | grep ' M' | wc -l)"
          TAGS="$TAGS untracked:$(git status --porcelain | grep '??' | wc -l)"
          TAGS="$TAGS sum:$DIFF"
      fi

      if [ "x$TAGS" != "x" ]; then
          TAGS=$(echo $TAGS | sed 's/^ //')
          echo -ne ' [\033[35;1m'$TAGS'\033[0m]'
      fi
  fi
}

PS1='\n${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]$(git_branch)\n\$ '