#! /bin/bash

export LANG=POSIX

path=(.)

while test $# -gt 0; do

	case "$1" in

	--patches)

		path[${#path[@]}]=$2

		shift 2

		;;

	*)

		echo "Usage $0 [--patches <dir>]" >&2

		exit 1

	esac

done

if test "${path[*]}" = "."; then

	path=(. ..)

fi

source $(dirname $0)/config.sh

parse_srcversion()

{

	local IFS=.

	set -- ${SRCVERSION%%-*}

	VERSION=$1

	PATCHLEVEL=${2:-0}

	SUBLEVEL=${3:-0}

	EXTRAVERSION=${SRCVERSION#${SRCVERSION%%-*}}

}

parse_srcversion

EXTRA_SYMBOLS=$(set -- $([ -e $(dirname $0)/extra-symbols ] && cat $(dirname $0)/extra-symbols) ; echo $*)

series=$(mktemp)

tmp_files="$series"

trap 'rm -rf $tmp_files' EXIT

warned=false

while read patch; do

	dir=${patch%/*}

	for p in "${path[@]}"; do

		if test -e "$p/$patch"; then

			echo "$p/$patch"

			continue 2

		fi

	done

	for p in "${path[@]}"; do

		if test -e "$p/$dir.tar.bz2"; then

			echo "unpacking $p/$dir.tar.bz2" >&2

			if ! $warned; then

				echo "pass --patches <directory with unpacked tarballs> to avoid this" >&2

				warned=true

			fi

			tmp_files="$tmp_files $dir"

			tar -xjf "$p/$dir.tar.bz2"

			echo "$patch"

			continue 2

		fi

	done

	echo "Can't find $patch" >&2

	exit 1

done >"$series" < <($(dirname $0)/guards $EXTRA_SYMBOLS 

# Parse all the changes to KERNELRELEASE out of all patches and

# convert them to shell code that can be evaluated. Evaluate it.

eval "$(

    <"$series" xargs awk '

    /^--- |^\+\+\+ / \

	{ M = match($2, /^[^\/]+\/Makefile( \t|$)/) }

    M && /^+(VERSION|PATCHLEVEL|SUBLEVEL|EXTRAVERSION)/ \

	{ print }

    ' \

    | sed -e 's,^+,,' -e 's, *= *\(.*\),="\1",'

)"

echo "$VERSION.$PATCHLEVEL.$SUBLEVEL$EXTRAVERSION"