#!/bin/sh
#
# gitenealogy - Trace the ancestry of a file in git across renames
#
# Written 2010 by Werner Almesberger
# Copyright 2010 Werner Almesberger
#
# 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.
#


usage()
{
    echo "usage: $0 path" 2>&1
    exit 1
}


[ -z "$1" -o ! -z "$2" ] && usage
[ ! -f "$1" ] && usage

git log --follow --name-status "$1" |
    awk '
/^commit /{ if (c) print c, n; c = $2 }
{ if (NF) n = $(NF) }
END { if (c) print c, n; }'