#!/bin/sh

user="$1"
if test -z "$user"; then
  echo "user name required." && exit 1
else
  count=`git log --oneline --pretty="format: %an" | grep "$user" | wc -l`
  test $count -eq 0 && echo "$user did not contribute." && exit 1
  git shortlog | grep "$user" -A $count
fi