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

_flavor=vserver
pkgname=linux-${_flavor}
pkgver=3.4.65
pkgrel=0
_vsver=vs2.3.3.9

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"
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="967f72983655e2479f951195953e8480  linux-3.4.tar.xz
5cc0b3e19712173f8f2612c17af16a64  patch-3.4.65.xz
1eed35999e8ba9d4549e9c4adb87e034  patch-3.4.65-vs2.3.3.9.diff
5901bfca41ac6a557e12b48115d3d1b2  aslr-pie.patch
1fce2ef2e47d19c150ab0b2df3373a57  kernelconfig.x86
b6a18f4cb2523bbd2500809e61172f8f  kernelconfig.x86_64"
sha256sums="ff3dee6a855873d12487a6f4070ec2f7996d073019171361c955639664baa0c6  linux-3.4.tar.xz
0cab0843ed38ae6f1839bdaa425033d9d1f3754923cc925ed6e13715c2158216  patch-3.4.65.xz
37cf0ab273273cb5708304dc2f55302cc9c7429801927ed14d7b523f5e8ba899  patch-3.4.65-vs2.3.3.9.diff
37ad5b5f44fcc119f71c81e8cda376c13ecc04f785bd2e1892782def6f5cfae3  aslr-pie.patch
e97b45a117671c5a87a9ba4a1f946125053eac078d297f61f9c8d4594acbf830  kernelconfig.x86
d44d1a1be3402847f540cc0cfb201deec7084b4c516e592b92e115ab3f71d4b5  kernelconfig.x86_64"
sha512sums="1c49b336750c9c2b49d21e54126f22a800367296be0d57e6df28b1532cbeba7fc3bdf4cfe27d9810576e76c2db2e9c2493f0804451c915137cb78d7aa61f236c  linux-3.4.tar.xz
56c25d652a26878c755fcefe37aa308c5919a4c2c812590b9ef7bb5d2b6628f532507db96e554ab13b905742ffc4f710e04e1dd72427ee707f1d951141267712  patch-3.4.65.xz
d0f535f941553d71da11f372e675e8c4faa42cad4e5eccecb0fd784e3ed9502611912ef00e457afd91d29dd0577df7a475f5c69c442bdac655397f44b55310da  patch-3.4.65-vs2.3.3.9.diff
0314ff29551dfde45fe05d43cb571348d955b5338b33acb26e29fa80f73ef28f34bbdf01006e4aecee372f3863517357a99cdec08b183a8dd9121ee9d0314b2e  aslr-pie.patch
f12f999c84f724a4ac20a736c7f56671e23b2a9ddce4b0576dc17d0b3e8f319f5c4bc40b58992eba75ace44148018d85de24b2516d0a83240cd0ca3803606eae  kernelconfig.x86
4cf43a7fc609e9822919e5706f38c03ef72deae2eae6b7d4c4ca7f9f29bccd1f01c0d65660a0c5234df6c2123a1d0c797dbdcb57ca5559e39644704426657f3e  kernelconfig.x86_64"