#!/usr/bin/env sh
# Copyright 2007-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Author: Michael Haubenwallner <haubi@gentoo.org>

set -e

versioning_done=no

while [ "x$1" != x ]; do
	arg=$1
	shift
	case "x${arg}" in
	x--version=*)
		echo "x${arg}" | sed -e 's,^x--version=,,' > version
		versioning_done=yes
		;;
	esac
done
svnurl='$HeadURL$'

mainversion=`grep 'AC_INIT(toolchain-prefix-wrapper,[0-9\.]*svnversion)' configure.ac | sed -e 's/.*([^,]*,\([^),]*\)\.svnversion\>.*)/\1/'`
if [ "x${mainversion}" != x ]; then
	# configure.ac indicates to define the package-version automagically
	if [ "x${versioning_done}" != xyes ] && svn info >& /dev/null ; then
		svnversion=`svn --version 2>/dev/null | head -n 1`
		case ${svnversion} in
		*" version 1."[6-7]"."*) revisionrange="20-27" ;;
		*" version 1."[0-5]"."*) revisionrange="19-26" ;;
		*) echo "don't know how to work with ${svnversion}" >&2; exit 1 ;;
	   esac
		# we are in an svn sandbox:
		# then we need to determine the version out of svn keyword 'HeadURL'.
		case "${svnurl}" in
		*'/trunk/'*)
			# is snapshot from trunk:
			# version is mainversion + '.' + [last-committed] svn revision
			svn status -v | cut -c${revisionrange} | sort -rn | { read v ; echo "${mainversion}.${v}" ;} > version
			versioning_done=yes
			;;
		*'/branches/'*)
			# is snapshot from branch:
			# version is branch-number + '.' + [last-committed] svn revision
			(	echo -n "${svnurl}" \
				| sed -e "s,-branch/bootstrap \\\$,,; s,.*/,," -e "s,^.*-,,"
				svn status -v | cut -c${revisionrange} | sort -rn | { read v ; echo ".${v}" ;}
			) > version
			versioning_done=yes
			;;
		esac
	fi
	if [ "x${versioning_done}" != xyes ]; then
		case "${svnurl}" in
		*'/tags/'*)
			# is tag: version is tag number
			(	echo "${svnurl}" \
				| sed -e "s,/bootstrap \\\$,,; s,.*-,,"
			) > version
			versioning_done=yes
			;;
		*)
			if [ -r version ]; then
				# we reuse the 'version' determined during packaging from svn.
				versioning_done=yes
			fi
			;;
		esac
	fi
	if [ "x${versioning_done}" != xyes ]; then
		echo "error: no 'version' file and unknown svnurl '${svnurl}'" >&2
		echo "error: cannot determine package version" >&2
		exit 1
	fi
else
	# configure.ac defines the version, keep 'version' empty.
	: > version
fi
set +x

echo "mkdir -p build-aux"
      mkdir -p build-aux
echo "aclocal"
      aclocal
echo "autoheader"
      autoheader
echo "automake --add-missing --copy --foreign"
      automake --add-missing --copy --foreign
echo "autoconf"
      autoconf

if [ -s version ]; then
	version=`cat version`
	eval `grep '^PACKAGE_VERSION=' configure | head -n 1`
	if [ "${version}" != "${PACKAGE_VERSION}" ]; then
		(
			echo '--- configure'
			echo '+++ configure'
			grep "\<${PACKAGE_VERSION}\>" configure \
			| awk '{print "@@ -1,1 +1,1 @@"; print "-" $0; print "+" $0}' \
			| sed -e "s|\(^+.*\)\<${PACKAGE_VERSION}\>|\1${version}|"
		) | patch --no-backup-if-mismatch configure -
	fi
fi