#!/bin/sh4 -e
#
# Copyright (C) 2000-2011  Dmitry V. Levin <ldv@altlinux.org>
#
# Generates and adds changelog entry to rpm specfile.
#
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

PROG=add_changelog

. shell-error
. shell-quote

STAMPER=stamp_spec
RPM=rpm
RPMARG=
ENTRY='- '
NOCHECK=

USAGE()
{
	[ "$1" = 0 ] || exec >&2
	cat <<EOF
add_changelog - generates and adds changelog entry to rpm specfile.

add_changelog is free software, covered by the GNU General Public License.
add_changelog comes with ABSOLUTELY NO WARRANTY, see license for details.

Usage: $PROG [options] <specfile> [ <specfile>]*

Valid options are:
-s STAMPER, --stamper=STAMPER           STAMPER executable;
-r RPM, --rpm=RPM                       RPM executable;
-a args, --args=args                    arguments for RPM;
-e entry, --entry=entry                 changelog entry text;
--nocheck                               do not check specfile versions;
-h, --help                              show this text.

Configured STAMPER executable is $STAMPER;
Configured RPM executable is $RPM;
Configured changelog entry is '$ENTRY'.
EOF
	[ -n "$1" ] && exit "$1" || exit
}

TEMP=`getopt -n $PROG -o a:e:r:s:h -l args:,entry:,rpm:,stamper:,nocheck,help -- "$@"` || USAGE
eval set -- "$TEMP"

while :; do
	case "$1" in
		-a|--args) shift; RPMARG="$1"; shift
			;;
		-e|--entry) shift; ENTRY="$1"; shift
			;;
		-r|--rpm) shift; RPM="$1"; shift
			;;
		-s|--stamper) shift; STAMPER="$1"; shift
			;;
		--nocheck) NOCHECK=1; shift
			;;
		-h|--help) USAGE 0
			;;
		--) shift; break
			;;
		*) echo "$PROG: unrecognized option: $1" >&2; exit 1
			;;
	esac
done

[ -n "$*" ] || USAGE

exitcode=

quote_shell_variable RPM "$RPM"
quote_shell_variable STAMPER "$STAMPER"
quote_shell_args aRPMARG "$RPMARG"
[ -z "$RPMARG" ] && vRPMARG= ||
	vRPMARG="-a \"$(quote_shell "$RPMARG")\""

for spec in "$@"; do
	if [ ! -r "$spec" ]; then
		echo "$PROG: $spec: not available, skipping"
		exitcode=1
		continue
	fi
	quote_shell_variable qspec "$spec"
	if [ -z "$NOCHECK" ]; then
		oldver=$(eval "\"$RPM\" $aRPMARG -q --qf '%{CHANGELOGNAME}\n' --specfile \"$qspec\"" |
			sed -n '/^(none)$/q;s/[^<]\+<[^>]\+> *\(.\+\)$/\1/pg')
		newver=$(eval "\"$RPM\" $aRPMARG -q --qf '%|SERIAL?{%{SERIAL}:}|%{VERSION}-%{RELEASE}\n' --specfile \"$qspec\"" |
			head -1)
		if [ "$oldver" = "$newver" ]; then
			echo "$PROG: $spec: version \"$oldver\" unchanged, skipping"
			exitcode=1
			continue
		fi
	fi
	if stamp="$(eval "\"$STAMPER\" -r \"$RPM\" $vRPMARG \"$qspec\"")" &&
	   [ -n "$stamp" ]; then
		cat << __EOF__EOF__EOF__ | paste_changelog "$spec"
$stamp
$ENTRY

__EOF__EOF__EOF__
	fi
done

exit $exitcode