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

_flavor=vanilla
pkgname=linux-${_flavor}
pkgver=3.10.9
case $pkgver in
	*.*.*)	_kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=0
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs linux-firmware"
makedepends="perl installkernel bash gmp-dev bc"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
source="http://ftp.kernel.org/pub/linux/kernel/v3.x/linux-$_kernver.tar.xz
	kernelconfig.x86
	kernelconfig.x86_64
	kernelconfig.armel
	"
if [ "${pkgver%.0}" = "$pkgver" ]; then
	source="$source
	http://ftp.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz"
fi
subpackages="$pkgname-dev"
arch="x86 x86_64 arm"
license="GPL-2"

_abi_release=${pkgver}

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

	# first apply patches in specified order
	for i in $source; do
		case $i in
		*.patch)
			msg "Applying $i..."
			if ! patch -s -p1 -N -i "$srcdir"/$i; then
				echo $i >>failed
				_patch_failed=1
			fi
			;;
		esac
	done

	if ! [ -z "$_patch_failed" ]; then
		error "The following patches failed:"
		cat failed
		return 1
	fi

	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 "$srcdir"/build || return 1
	make menuconfig
	cp .config "$startdir"/$_config
}

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 "$pkgdir"/lib/modules
	make -j1 modules_install firmware_install install \
		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_PATH="$pkgdir"/boot \
		|| return 1

	rm -f "$pkgdir"/lib/modules/${_abi_release}/build \
		"$pkgdir"/lib/modules/${_abi_release}/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"
	depends="gmp-dev"
	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 modules_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
b45a47233d38aa569e3b67c4ff11a6fb  kernelconfig.x86
6d2050943c56d9d1d0a65b5cf4dcd69a  kernelconfig.x86_64
8bb9abcbc215f31b7a771b78e610a0e7  kernelconfig.armel
868d7f5315f95da5e48ed56691a36263  patch-3.10.9.xz"
sha256sums="df27fa92d27a9c410bfe6c4a89f141638500d7eadcca5cce578954efc2ad3544  linux-3.10.tar.xz
cad17ce82cce1eca2a7c4892e2097673928947f188be1fd548e667d61ae7f5cf  kernelconfig.x86
9645b126ab45cd2c104d48b28cd9be5d0559b8bd533e99206d3913b7c5a703a5  kernelconfig.x86_64
dd721c62c4943346dd3711147d81552be1559cf87f2e8e50d3c32f601e8a43a3  kernelconfig.armel
851224c4719e362a8ae6785abd7a8e59aa7200ee82fffbea291003da47a64bf6  patch-3.10.9.xz"
sha512sums="5fb109fcbd59bf3dffc911b853894f0a84afa75151368f783a1252c5ff60c7a1504de216c0012be446df983e2dea400ad8eeed3ce04f24dc61d0ef76c174dc35  linux-3.10.tar.xz
f4522009ff25fb00ac349388c00e122bbebbb1040a3253a7ae01d4cdbd0d937c229ec1886cb840c918771737c26fc5ccc387e175ca59f04d3539331e4b7cefac  kernelconfig.x86
e97c11427cc6e5263cc1b3a81b88b006a09b700e4c4d668947eb941dcfe945df5a8fff9b841fea083e72bb780475fb0de1d6e25a50ac39d6edeb3eb9d30f2507  kernelconfig.x86_64
42e56df4dca6b1e47549eed2c96773b673c7cd51517e33368cbcb8f7b7950072bb0b2bd847adef44034d03988301be683046eb5073376142adccf1d349411288  kernelconfig.armel
4e1ba00bd38ce248dc9bb160a4bba5800825c2ca8665134ffd56bbfffbfbe7a6acd58bae7fbb7a5490e22393c13a86c1a7937397710c27ca14bffb40ec0d809a  patch-3.10.9.xz"