# Copyright 1999-2003 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /home/cvsroot/gentoo-x86/sys-kernel/ck-sources/ck-sources-2.4.20-r6.ebuild,v 1.1 2003/04/16 03:39:35 lostlogic Exp $

IUSE="build supermount xfs acpi nforce2 bootsplash swapprefetch freqscal grsec"

ETYPE="sources"
inherit kernel || die

# OKV=original kernel version, KV=patched kernel version.
OKV="2.4.21"
KV="2.4.21-ck${PR/r/}"
S=${WORKDIR}/linux-${KV}
EXTRAVERSION="-ck${PR/r/}"

DESCRIPTION="Full sources for the Con Kolivas's high performance kernel and its optional features"
HOMEPAGE="http://members.optusnet.com.au/ckolivas/kernel/index2.html"

### Below is a list of all the patchs used in current ck kernel:

## Main CK performance patch (O(1)B,PE,LL,CKVM,RL2,VH,ST,DT123)
#MAIN_PATCH="0306111747_${KV}.patch.bz2"

## Performance enhancements (installed by default):
# Base ck contains the batch O(1) scheduler, preemptible, low latency:
BASE_PATCH="1000_O1_PE_LL_0306111747_${OKV}.patch.bz2"
# Con Colivas autoregulation vm hacks:
# (will be dropped if "aavm" or "rmap" is in USE)
CKVM_PATCH="1010_CKVM_0306102120_${KV}.patch.bz2"
# Read Latency2:
RL2="1020_RL2_0305310042_${KV}.patch.bz2"
# Desktop Tuning 1:
DT1_PATCH="1021_DT1_030531616_${KV}.patch.bz2"
# Variable HZ setting:
VH_PATCH="1030_VH_0305310045_${KV}.patch.bz2"
# Desktop Tuning 2:
DT2_PATH="1031_DT2_0305310048_${KV}.patch.bz2"
# Scheduler Tunables:
ST_PATCH="1040_ST_0305310104_${KV}.patch.bz2"
# Desktop Tuning 3:
DT3_PATCH="1041_DT3_0305242209_${KV}.patch.bz2"

## Extra features:
# Supermount-NG v1.2.7:
# USE=supermount (local)
SM_PATCH="1050_SM1.2.7_0305310109_${KV}.patch.bz2"
# XFS file system:
# USE=xfs (global)
XFS_PATCH="1060_XFS_0305311351_${KV}.patch.bz2"
# ACPI 20030522:
# USE=acpi (global - should use "acpi4linux"?)
ACPI_PATCH="1070_ACPI_0305311044_${KV}.patch.bz2"
# Nvidia Nforce2 update:
# USE=nforce2 (local)
NF2_PATCH="1080_NF2_0305311048_${KV}.patch.bz2"
# Bootsplash:
# USE=bootsplash (local)
BS_PATCH="1090_BS_0306020027_${KV}.patch.bz2"

## Misc other patches:
# Swap prefetching:
# USE=swapprefetch (local)
SP_PATCH="1011_SP_0306102217_${KV}.diff.bz2"
# CPU Frequency scaling for supported laptops:
# USE=freqscal (local)
CFS_PATCH="1100_CFS_0305311539_${KV}.patch.bz2"
# Grsec 1.9.9h (depends on 1010 and 1060):
# USE=grsec (local)
GRS_PATCH="1161_GRS1.9.9h_0306081216_${KV}.patch.bz2"


### Create the SRC_URI from USE flags.
CK_URL="http://members.optusnet.com.au/ckolivas/kernel"
#SRC_URI="http://www.kernel.org/pub/linux/kernel/v2.4/linux-${OKV}.tar.bz2 ${CK_URL}/${MAIN_PATCH}"
SRC_URI="http://www.kernel.org/pub/linux/kernel/v2.4/linux-${OKV}.tar.bz2"
for PATCH in ${BASE_PATCH} ${CKVM_PATCH} ${RL2} ${DT1_PATCH} ${VH_PATCH} ${DT2_PATH} ${ST_PATCH} ${DT3_PATCH}
do
	SRC_URI="${SRC_URI} ${CK_URL}/${PATCH}"
done
[ -n "`use supermount`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${SM_PATCH}"
[ -n "`use xfs`" -o -n "`use grsec`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${XFS_PATCH}"
[ -n "`use acpi`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${ACPI_PATCH}"
[ -n "`use nforce2`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${NF2_PATCH}"
[ -n "`use bootsplah`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${BS_PATCH}"
[ -n "`use swapprefetch`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${SP_PATCH}"
[ -n "`use freqscal`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${CFS_PATCH}"
[ -n "`use grsec`" ] && SRC_URI="${SRC_URI} ${CK_URL}/${GRS_PATCH}"

KEYWORDS="~x86 -ppc"
SLOT="${KV}"

src_unpack() {
	
	# Symlink the default patches
	for PATCH in ${BASE_PATCH} ${CKVM_PATCH} ${RL2} ${DT1_PATCH} ${VH_PATCH} ${DT2_PATH} ${ST_PATCH} ${DT3_PATCH}
	do
		ln -s ${DISTDIR}/${PATCH} || die
	done
	
	# Symlink optional patches, taking the dependencies into account.
	[ -n "`use supermount`" ] && ( ln -s ${DISTDIR}/${SM_PATCH} || die )
	[ -n "`use xfs`" -o -n "`use grsec`" ] && ( ln -s ${DISTDIR}/${XFS_PATCH} || die )
	[ -n "`use acpi`" ] && ( ln -s ${DISTDIR}/${ACPI_PATCH} || die )
	[ -n "`use nforce2`" ] && ( ln -s ${DISTDIR}/${NF2_PATCH} || die )
	[ -n "`use bootsplah`" ] && ( ln -s ${DISTDIR}/${BS_PATCH} || die )
	[ -n "`use swapprefetch`" ] && ( ln -s ${DISTDIR}/${SP_PATCH} || die )
	[ -n "`use freqscal`" ] && ( ln -s ${DISTDIR}/${CFS_PATCH} || die )
	[ -n "`use grsec`" ] && ( ln -s ${DISTDIR}/${GRS_PATCH} || die )

	# Unpack the vanilla sources
	unpack linux-${OKV}.tar.bz2
	
	# Apply the symlinked patches. (the way it probably should be)
	#for PATCH in 1*
	#do
	#	einfo "Apply patch ${PATCH}"
	#	bzcat ${PATCH} | patch -p0 || die "Patching with ${PATCH} failed."
	#done
	
	# I've added two temporary hacks here:
	# - remove the remaining "-rc8" in the first patch
	# - apply with -p1 because several patchs are not against 2.4.21
	mv ${BASE_PATCH} 0-${BASE_PATCH}
	cd linux-${OKV}
	einfo "Apply patch ${BASE_PATCH}"
	bzcat ../0-${BASE_PATCH} | sed s:'EXTRAVERSION = -rc8':'EXTRAVERSION =': \
	  | patch -p1 || die "Patching with ${BASE_PATCH} failed."
#	einfo "Apply patch ${MAIN_PATCH}"
#	bzcat ${DISTDIR}/${MAIN_PATCH} | sed s:'EXTRAVERSION = -rc8':'EXTRAVERSION =': \
#	  | patch -p1 || die "Patching with ${MAIN_PATCH} failed."
	for PATCH in ../1*
	do
		einfo "Apply patch ${PATCH/\.\.\//}"
		bzcat ${PATCH} | patch -p1 || die "Patching with ${PATCH/\.\.\//} failed."
	done
	cd ..

	# Rename the kernel
	mv linux-${OKV} linux-${KV} || die
	
	# Do the usual cleanups
	cd linux-${KV}
	kernel_universal_unpack
}