#!/bin/bash
set -e

# stg-mdiff - display meta-diffs, ie. diffs of diffs

# Main use: show evolutions of a patch.
# eg. stg-mdiff foo@stable foo
#     stg-mdiff foo 012345567ABCD # sha1 for "foo" as integrated upstream

# Copyright (c) 2007 Yann Dirson <ydirson@altern.org>
# Subject to the GNU GPL, version 2.

usage()
{
    echo "Usage: $(basename $0) <patch1> <patch2>"
    exit 1
}

if [ "$#" != 2 ]; then
    usage
fi

colordiff -u <(stg show "$1") <(stg show "$2") | less -RFX