#!/bin/bash
#
# --- ROCK-COPYRIGHT-NOTE-BEGIN ---
# 
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
# Please add additional copyright information _after_ the line containing
# the ROCK-COPYRIGHT-NOTE-END tag. Otherwise it might get removed by
# the ./scripts/Create-CopyPatch script. Do not edit this copyright text!
# 
# ROCK Linux: rock-src/scripts/Create-PkgUpdPatch
# ROCK Linux is Copyright (C) 1998 - 2006 Clifford Wolf
# 
# 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. A copy of the GNU General Public
# License can be found at Documentation/COPYING.
# 
# Many people helped and are helping developing ROCK Linux. Please
# have a look at https://www.rocklinux.org/ and the Documentation/TEAM
# file for details.
# 
# --- ROCK-COPYRIGHT-NOTE-END ---

if [ "$1" != "${1#-}" ] ; then
	cat << EOT >&2

$0:
Automatically create package-update patches.

Input format (e.g.): automake-1.5, bind-9.2.0rc3, binutils-2.11.90.0.31,
                     gettext-0.10.40, gnome-applets-1.4.0.4

Output format: unified diff for the .desc files

Type ./scripts/Help Create-PkgUpdPatch for details."

EOT
	exit 1
fi

if [ "$*" ] ; then
	echo "$*" | exec $0
	exit $?
fi

base=.
. scripts/functions

tr ', \t' '\n\n\n' |
tr -s '\n' | 
while read x ; do
	pkg="" ; pkgdir=""
	[ -z "$x" ] && continue

	if [ "${x//=/}" != "${x}" ] ; then
		pkg="${x%%=*}"
		xpkg="${x#*=}"
		newver="${xpkg#*_}"
		xpkg="${xpkg%-*}"
	else
		pkg="${x%%_*}"
		xpkg="${pkg}"
		newver="${x#*_}"
	fi

	for var in pkg xpkg newver ; do
		if [ -z "$( eval echo \$${var} )" ] ; then
			echo "ERROR: Please specify package and version in this format:" >&2
			echo "ERROR:    package_version     package=xpackage_version" >&2
			echo "ERROR: You entered: $x" >&2
			continue 2
		fi
	done

	echo "[ ${pkg}=${xpkg}-${newver} ]" >&2
	for dir in package/*/* ; do
		if [ "${dir##*/}" == "$pkg" ] ; then
			if [ -n "${pkgdir}" ] ; then
				echo "ERROR: Package in multiple repositories: $pkg" >&2
				echo "ERROR: $( ls -d package/*/${pkg} )" >&2
				continue 2
			fi
			pkgdir="$dir"
			continue
		fi
	done
	if [ -n "$pkgdir" ] ; then
		unset ${!desc_*} descparser_ign_xpkg
		if [ "${pkg}" == "${xpkg}" ] ; then
			oldver="`egrep "^\[(V|VER|VERSION)\] " $pkgdir/$pkg.desc |
				tr '\t' ' ' | tr -s ' ' | cut -f2 -d' '`"
			if [ $( wc -l <<< "${oldver}" ) -gt 1 ] ; then
				echo "ERROR: Package ${pkg} is a forked package!" >&2
				echo "ERROR: Use $0 package=xpackage-version" >&2
				continue
			fi
		else
			parse_desc ${pkgdir}/${pkg}.desc
			oldver=${desc_V##*
}
			# this is not a typo! desc_V contains all [V] tags newline separated
		fi
		tmpfile=`mktemp` ; tmpfile2=`mktemp`
		[ "$oldver" == "$newver" ] && continue
		echo "Upgrade Patch for $pkg ($pkgdir): $oldver -> $newver"
		sed -e"s/^\[\(D\|DOWN\|DOWNLOAD\)\] [0-9]\+ \(.*\)$oldver\(.*\)/[\1] 0 \2__newver__\3/" \
			-e"s/${oldver//./\\.}/__newver__/g" -e"s/^\(\[V\] __newver__\) .*/\1/" \
			< $pkgdir/$pkg.desc > $tmpfile
		sed -i -e"s,__newver__,$newver,g" $tmpfile

		diff -u ./$pkgdir/$pkg.desc $tmpfile | tee $tmpfile2
		[ -s $tmpfile2 ] || echo "Patch for '$x' is empty!" >&2
		rm -f $tmpfile $tmpfile2
	else
		echo "Can't find package for '$x'!" >&2
		echo "Can't find package for '$x'!"
	fi
	echo
done