From 426ad83d914ca4ac5bc022e7df63c27ec19a2c64 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sat, 10 Dec 2011 08:50:47 +0000
Subject: [PATCH] extend rpm_spec_epatch to handle -b %patch options (which is
 really patch --suffix)

---
 eclass/rpm.eclass | 36 ++++++++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 4 deletions(-)

diff --git a/eclass/rpm.eclass b/eclass/rpm.eclass
index 21c7f24575a4..c4550919da89 100644
--- a/eclass/rpm.eclass
+++ b/eclass/rpm.eclass
@@ -1,6 +1,6 @@
 # Copyright 1999-2009 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/rpm.eclass,v 1.20 2010/07/18 21:57:20 vapier Exp $
+# $Header: /var/cvsroot/gentoo-x86/eclass/rpm.eclass,v 1.21 2011/12/10 08:50:47 vapier Exp $
 
 # @ECLASS: rpm.eclass
 # @MAINTAINER:
@@ -82,18 +82,46 @@ rpm_src_unpack() {
 # all the patches listed in it.  If the spec does funky things like moving
 # files around, well this won't handle that.
 rpm_spec_epatch() {
-	local p spec=${1:-${PN}.spec}
-	local dir=${spec%/*}
+	local p spec=$1
+	local dir
+
+	if [[ -z ${spec} ]] ; then
+		# search likely places for the spec file
+		for spec in "${PWD}" "${S}" "${WORKDIR}" ; do
+			spec+="/${PN}.spec"
+			[[ -e ${spec} ]] && break
+		done
+	fi
+	[[ ${spec} == */* ]] \
+		&& dir=${spec%/*} \
+		|| dir=
+
+	ebegin "Applying patches from ${spec}"
+
 	grep '^%patch' "${spec}" | \
 	while read line ; do
+		# expand the %patch line
 		set -- ${line}
 		p=$1
 		shift
-		EPATCH_OPTS="$*"
+
+		# process the %patch arguments
+		local arg
+		EPATCH_OPTS=
+		for arg in "$@" ; do
+			case ${arg} in
+			-b) EPATCH_OPTS+=" --suffix" ;;
+			*)  EPATCH_OPTS+=" ${arg}" ;;
+			esac
+		done
+
+		# extract the patch name from the Patch# line
 		set -- $(grep "^P${p#%p}: " "${spec}")
 		shift
 		epatch "${dir:+${dir}/}$*"
 	done
+
+	eend
 }
 
 EXPORT_FUNCTIONS src_unpack
-- 
2.26.2