#!/bin/bash
#
#  zipdiff.sh - extract two zip files and create unified diff
#  Copyright (C) 2011  Claire Xenia Wolf <claire@clairexen.net>
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#

if [ $# -ne 2 ]; then
	echo "Usage: $0 old-zip new-zip" >&2
	exit 1
fi

tmp1="$(mktemp -d)"
tmp2="$(mktemp -d)"
trap 'rm -rf "$tmp1" "$tmp2"' 0

set -e
unzip "$1" -d "$tmp1"
unzip "$2" -d "$tmp2"
diff -ruN "$tmp1" "$tmp2" | filterdiff --strip=3