#! /bin/sh
if git branch --verbose | grep -q "\(ahead\|behind\) [0-9]"; then
  up=`git rev-parse --abbrev-ref @{u} 2>/dev/null`
  if [ -n "$up" -a "$up" != "@{u}" ]; then
      set -- `git rev-list --count --left-right @{u}...HEAD`
      left=$1
      right=$2
      s=''
      if [ "$left" -gt 0 ]; then
          s="$s-$left"
      fi
      if [ "$right" -gt 0 ]; then
          s="$s+$right"
      fi
  fi
  if [ -n "$s" ]; then
     echo `pwd`: $s
  else
     pwd
  fi
fi