#!/bin/bash
# vim: set fileencoding=UTF-8:
# Copyright 2013 Red Hat, Inc.
# Author: Jan Pokorný <jpokorny at redhat dot com>
# Licensed under MIT license

set -eu
export LC=C

HERE=$(dirname "$(readlink -f "${BASH_SOURCE}")")

patch_figure_expr() {
	local line file hunk offset perfile_expr= final_expr=
	while read line; do
		#echo "${line}"
		case "${line}" in
			patching\ file\ *|@@EOF@@)
				if test -n "$perfile_expr"; then
					final_expr=${final_expr:+${final_expr}::}
					final_expr+="${file}:${perfile_expr}"
				fi
				file=${line#patching file }
				perfile_expr=
				;;
			Hunk\ \#*\ succeeded\ at\ *\ \(offset\ *\ lines\).)
				hunk=${line#Hunk #}
				hunk=${hunk%% *}
				offset=${line#* (offset }
				offset=${offset% *}
				perfile_expr=${perfile_expr:+${perfile_expr}:}
				perfile_expr+="${hunk}/${offset}"
				;;
		esac
	done < <(patch -o- "$@" 2>&1 >/dev/null; echo '@@EOF@@')
	echo "${final_expr}"
}

patches=
args=
cnt=1
i=
while test ${cnt} -le $#; do
	i="${@:${cnt}:1}"
	echo "${i}"
	case "${i}" in
		-*|--*) args+=" ${i}";;
		*)	patches+=" ${i}";;
	esac
	let cnt+=1
done

#echo "${patches}"
#echo "${args}"
#cat ${patches} | patch_figure_expr ${args}
"${HERE}"/fix-offsets --expr "$(cat ${patches} | patch_figure_expr ${args})" ${patches}