# Maintainer: Natanael Copa <ncopa@alpinelinux.org>

_flavor=vserver
pkgname=linux-${_flavor}
pkgver=3.10.18
pkgrel=0
_vsver=vs2.3.6.6

if [ "${pkgver##*.*.*}" = "$pkgver" ]; then
	_kernver=$pkgver
else
	_kernver=${pkgver%.*}
fi

pkgdesc="Linux kernel with vserver"
url="http://linux-vserver.org/"
depends="mkinitfs linux-firmware"
makedepends="perl installkernel bash bc"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
source="http://www.kernel.org/pub/linux/kernel/v3.x/linux-$_kernver.tar.xz
	http://www.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz
	patch-$pkgver-$_vsver.diff
	aslr-pie.patch
	kernelconfig.x86
	kernelconfig.x86_64
	"
subpackages="$pkgname-dev"
arch="all"
license="GPL-2"

_abi_release=${pkgver}-${_vsver}

prepare() {
	cd "$srcdir"/linux-$_kernver
	if [ "${pkgver%.0}" = "$pkgver" ]; then
		msg "Applying $i"
		unxz -c < ../patch-$pkgver.xz | patch -p1 -N || return 1
	fi

	# ERR is no valid signal
	sed -i -e '/^trap/s/ERR//' scripts/link-vmlinux.sh

	# first apply patches in specified order
	for i in $source; do
		i=${i##*/}
		case $i in
		*.patch|*.diff)
			msg "Applying $i..."
			patch -s -p1 -i "$srcdir"/$i || return 1
			;;
		esac
	done

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config || return 1
	make -C "$srcdir"/linux-$_kernver O="$srcdir"/build HOSTCC="${CC:-gcc}" \
		silentoldconfig
}

# this is so we can do: 'abuild menuconfig' to reconfigure kernel
menuconfig() {
	cd "$srcdir"/build
	make menuconfig
	cp .config "$startdir"/$_config || return 1
}

build() {
	cd "$srcdir"/build
	export GCC_SPECS=hardenednopie.specs
	make CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
		|| return 1
}

package() {
	cd "$srcdir"/build
	mkdir -p "$pkgdir"/boot "$pkgdir"/lib/modules
	make -j1 modules_install install \
		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_PATH="$pkgdir"/boot \
		|| return 1

	rm -rf "$pkgdir"/lib/modules/*/build \
		"$pkgdir"/lib/modules/*/source
	rm -rf "$pkgdir"/lib/firmware

	install -D include/config/kernel.release \
		"$pkgdir"/usr/share/kernel/$_flavor/kernel.release
}

dev() {
	# copy the only the parts that we really need for build 3rd party
	# kernel modules and install those as /usr/src/linux-headers,
	# simlar to what ubuntu does
	#
	# this way you dont need to install the 300-400 kernel sources to
	# build a tiny kernel module
	#
	pkgdesc="Headers and script for third party modules for grsec kernel"
	local dir="$subpkgdir"/usr/src/linux-headers-${_abi_release}

	# first we import config, run prepare to set up for building
	# external modules, and create the scripts
	mkdir -p "$dir"
	cp "$srcdir"/$_config "$dir"/.config
	make -j1 -C "$srcdir"/linux-$_kernver O="$dir" HOSTCC="${CC:-gcc}" \
		silentoldconfig prepare scripts

	# remove the stuff that poits to real sources. we want 3rd party
	# modules to believe this is the soruces
	rm "$dir"/Makefile "$dir"/source

	# copy the needed stuff from real sources
	#
	# this is taken from ubuntu kernel build script
	# http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=blob;f=debian/rules.d/3-binary-indep.mk;hb=HEAD
	cd "$srcdir"/linux-$_kernver
	find . -path './include/*' -prune -o -path './scripts/*' -prune \
		-o -type f \( -name 'Makefile*' -o -name 'Kconfig*' \
		-o -name 'Kbuild*' -o -name '*.sh' -o -name '*.pl' \
		-o -name '*.lds' \) | cpio -pdm "$dir"
	cp -a drivers/media/dvb/dvb-core/*.h "$dir"/drivers/media/dvb/dvb-core
	cp -a drivers/media/video/*.h "$dir"/drivers/media/video
	cp -a drivers/media/dvb/frontends/*.h "$dir"/drivers/media/dvb/frontends
	cp -a scripts include "$dir"
	find $(find arch -name include -type d -print) -type f \
		| cpio -pdm "$dir"

	install -Dm644 "$srcdir"/build/Module.symvers \
		"$dir"/Module.symvers

	mkdir -p "$subpkgdir"/lib/modules/${_abi_release}
	ln -sf /usr/src/linux-headers-${_abi_release} \
		"$subpkgdir"/lib/modules/${_abi_release}/build
}

md5sums="4f25cd5bec5f8d5a7d935b3f2ccb8481  linux-3.10.tar.xz
e39b75595bf61d758087e1ddecd01a12  patch-3.10.18.xz
d9f07e9608af91b865f9d646ae0b96b2  patch-3.10.18-vs2.3.6.6.diff
35e2e5c7a5f0de3cdf540bb4ae894349  aslr-pie.patch
70d2cc88b867c9da26a0ab9a6da9973f  kernelconfig.x86
acccc23350bafce3fdb43c7c80296c6a  kernelconfig.x86_64"
sha256sums="df27fa92d27a9c410bfe6c4a89f141638500d7eadcca5cce578954efc2ad3544  linux-3.10.tar.xz
6fe9123444e4803d2bdec0f89a969024813bd54ba9114471589d1326deee8d6f  patch-3.10.18.xz
5acf8e93686cafd12cab26dd1d80a61cc8ed54199976ea4eaccd187238da9ab0  patch-3.10.18-vs2.3.6.6.diff
c18b47c7cd07837ca1c4f4702ef72e688a307b02f1f74012b329cea7d910ec85  aslr-pie.patch
874b7591214e69cf145f9bce1427b6774435a43c3dac50ea5c8ccd4c43790944  kernelconfig.x86
8deb8491dc854ed392f730e8ee53a32c47bba0b4350f0f81afdf741207084855  kernelconfig.x86_64"
sha512sums="5fb109fcbd59bf3dffc911b853894f0a84afa75151368f783a1252c5ff60c7a1504de216c0012be446df983e2dea400ad8eeed3ce04f24dc61d0ef76c174dc35  linux-3.10.tar.xz
b891e6969a0628f760aebf04e7b4cfd9e93c73fd1f61d9c50a2e3b812bff4f35f2b2a13f88319a106fb6d9929b83bc59384ddb651b17ea158739523ad252575a  patch-3.10.18.xz
95b4e2768da2f60347885dac3094803c65f1ba205a76ef58c2f577394e0a4c32f21570467b09d1c7301021fd49169784b2a261ebf7469d64161e55784e067297  patch-3.10.18-vs2.3.6.6.diff
41c74619359791a65dc2c017e8fdae9e8614c8c6d3306bec59dac84bc74455ea1b9c5d35d98c7ce414d8621d91c9dbe868916a8b89be6c60d1013235ef5c21ab  aslr-pie.patch
54c20b88b04d29bd4985b9ff0dd84ba5356719d905a5efc73258a9517419df0d144bfd96963abe4b781d6eda6acb02b4116e60fa878b6d932b5f8d66fc31e7c3  kernelconfig.x86
ff258d9fcc660b608e3ba3bd1f9384504e6ef12cc440931784e6badfdf9f67d0e06f1e23aeb070b5e525c81467be542c7e313940bf6e49e9c905003047a3d146  kernelconfig.x86_64"