From a32f54ee25dd7d5bc246155f7e708698b3827bd6 Mon Sep 17 00:00:00 2001
From: Tom Wijsman <tomwij@gentoo.org>
Date: Thu, 5 Sep 2013 17:04:26 +0000
Subject: Added support for experimental genpatches.

---
 eclass/ChangeLog       |  5 ++++-
 eclass/kernel-2.eclass | 58 +++++++++++++++++++++++++++++++++++++++-----------
 2 files changed, 50 insertions(+), 13 deletions(-)

diff --git a/eclass/ChangeLog b/eclass/ChangeLog
index 43a92837dbd1..6a4912adf257 100644
--- a/eclass/ChangeLog
+++ b/eclass/ChangeLog
@@ -1,6 +1,9 @@
 # ChangeLog for eclass directory
 # Copyright 1999-2013 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/ChangeLog,v 1.945 2013/09/05 09:59:52 mgorny Exp $
+# $Header: /var/cvsroot/gentoo-x86/eclass/ChangeLog,v 1.946 2013/09/05 17:04:26 tomwij Exp $
+
+  05 Sep 2013; Tom Wijsman <TomWij@gentoo.org> kernel-2.eclass:
+  Added support for experimental genpatches.
 
   05 Sep 2013; Michał Górny <mgorny@gentoo.org> python-utils-r1.eclass:
   Disable Python 2.5, 3.1 and PyPy 1.9 in the eclass.
diff --git a/eclass/kernel-2.eclass b/eclass/kernel-2.eclass
index 21032f8c85f8..ceac512f6c44 100644
--- a/eclass/kernel-2.eclass
+++ b/eclass/kernel-2.eclass
@@ -1,6 +1,6 @@
 # Copyright 1999-2013 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/kernel-2.eclass,v 1.287 2013/07/31 21:25:50 hasufell Exp $
+# $Header: /var/cvsroot/gentoo-x86/eclass/kernel-2.eclass,v 1.288 2013/09/05 17:04:26 tomwij Exp $
 
 # Description: kernel.eclass rewrite for a clean base regarding the 2.6
 #              series of kernel with back-compatibility for 2.4
@@ -40,7 +40,13 @@
 # K_DEFCONFIG			- Allow specifying a different defconfig target.
 #						  If length zero, defaults to "defconfig".
 # K_WANT_GENPATCHES		- Apply genpatches to kernel source. Provide any
-# 						  combination of "base" and "extras"
+# 						  combination of "base", "extras" or "experimental".
+# K_EXP_GENPATCHES_PULL	- If set, we pull "experimental" regardless of the USE FLAG
+#						  but expect the ebuild maintainer to use K_EXP_GENPATCHES_LIST.
+# K_EXP_GENPATCHES_NOUSE	- If set, no USE flag will be provided for "experimental";
+# 						  as a result the user cannot choose to apply those patches.
+# K_EXP_GENPATCHES_LIST	- A list of patches to pick from "experimental" to apply when
+# 						  the USE flag is unset and K_EXP_GENPATCHES_PULL is set.
 # K_GENPATCHES_VER		- The version of the genpatches tarball(s) to apply.
 #						  A value of "5" would apply genpatches-2.6.12-5 to
 #						  my-sources-2.6.12.ebuild
@@ -130,18 +136,32 @@ handle_genpatches() {
 	# respectively.  Handle this.
 
 	for i in ${K_WANT_GENPATCHES} ; do
-	if [[ ${KV_MAJOR} -ge 3 ]]; then
-		if [[ ${#OKV_ARRAY[@]} -ge 3 ]]; then
-			tarball="genpatches-${KV_MAJOR}.${KV_MINOR}-${K_GENPATCHES_VER}.${i}.tar.xz"
+		if [[ ${KV_MAJOR} -ge 3 ]]; then
+			if [[ ${#OKV_ARRAY[@]} -ge 3 ]]; then
+				tarball="genpatches-${KV_MAJOR}.${KV_MINOR}-${K_GENPATCHES_VER}.${i}.tar.xz"
+			else
+				tarball="genpatches-${KV_MAJOR}.${KV_PATCH}-${K_GENPATCHES_VER}.${i}.tar.xz"
+			fi
 		else
-			tarball="genpatches-${KV_MAJOR}.${KV_PATCH}-${K_GENPATCHES_VER}.${i}.tar.xz"
+			tarball="genpatches-${OKV}-${K_GENPATCHES_VER}.${i}.tar.xz"
 		fi
-	else
-		tarball="genpatches-${OKV}-${K_GENPATCHES_VER}.${i}.tar.xz"
-	fi
-	debug-print "genpatches tarball: $tarball"
-	GENPATCHES_URI="${GENPATCHES_URI} mirror://gentoo/${tarball}"
-	UNIPATCH_LIST_GENPATCHES="${UNIPATCH_LIST_GENPATCHES} ${DISTDIR}/${tarball}"
+
+		local use_cond_start="" use_cond_end=""
+
+		if [[ "${i}" == "experimental" && -z ${K_EXP_GENPATCHES_PULL} && -z ${K_EXP_GENPATCHES_NOUSE} ]] ; then
+			use_cond_start="experimental? ( "
+			use_cond_end=" )"
+
+			if use experimental ; then
+				UNIPATCH_LIST_GENPATCHES+=" ${DISTDIR}/${tarball}"
+				debug-print "genpatches tarball: $tarball"
+			fi
+		else
+			UNIPATCH_LIST_GENPATCHES+=" ${DISTDIR}/${tarball}"
+			debug-print "genpatches tarball: $tarball"
+		fi
+
+		GENPATCHES_URI+=" ${use_cond_start}mirror://gentoo/${tarball}${use_cond_end}"
 	done
 }
 
@@ -955,6 +975,20 @@ unipatch() {
 				fi
 			fi
 		fi
+
+		# If experimental was not chosen by the user, drop experimental patches not in K_EXP_GENPATCHES_LIST.
+		if [[ "${i}" == *"genpatches-"*".experimental."* && -n ${K_EXP_GENPATCHES_PULL} ]] ; then
+			if [[ -z ${K_EXP_GENPATCHES_NOUSE} ]] && use experimental; then
+				continue
+			fi
+
+			local j
+			for j in ${KPATCH_DIR}/*/50*_*.patch*; do
+				if [[ ! "${K_EXP_GENPATCHES_LIST}" == *"$(basename ${j})"* ]] ; then
+					UNIPATCH_DROP+=" $(basename ${j})"
+				fi
+			done
+		fi
 	done
 
 	#populate KPATCH_DIRS so we know where to look to remove the excludes
-- 
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