#!/bin/sh
#
# Copyright 2012 Paul Wouters <paul@libreswan.org>
# Based on Openswan version
# Called via Makefile.inc, IPSECVERSION is passed as $1, basedir as $2

usage() {
	echo "Usage: $0 <baseversion> [srctree]" >&2
	exit 1
}

baseversion=$1
[ -n "$baseversion" ] || usage

cd "${2:-.}" || usage

if test -d .git
then
	gitcheck="`git version 2> /dev/null`"
	if test -z "$gitcheck"
	then
		echo >&2 "Error: git should be installed to determine exact Libreswan version"
		# fallback
		echo $baseversion
		exit
	fi
	# use git to determine tree differences
	BRANCH="`head -1 .git/HEAD  | sed \"s/^.*\///\"`"
	CUR="`git describe --tags --dirty`"
	echo "$CUR-$BRANCH"
else
	echo $baseversion
fi