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

_flavor=vanilla
pkgname=linux-${_flavor}
pkgver=4.4.47
case $pkgver in
	*.*.*)	_kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=0
pkgdesc="Linux vanilla kernel"
url="http://kernel.org"
depends="mkinitfs linux-firmware"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers"
options="!strip"
_config=${config:-config-vanilla.${CARCH}}
install=
source="https://kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/linux-$_kernver.tar.xz
	config-vanilla.aarch64
	config-vanilla.armhf
	config-vanilla.x86
	config-vanilla.x86_64
	config-vanilla.ppc
	config-vanilla.ppc64le

	0001-Add-dts-for-GIGABYTE-X-Gene-MP30-AR0.patch
	"
if [ "${pkgver%.0}" = "$pkgver" ]; then
	source="$source
	http://ftp.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/patch-$pkgver.xz"
fi
subpackages="$pkgname-dev"
arch="all"
license="GPL2"

_abi_release=${pkgver}
_carch=${CARCH}
case "$_carch" in
aarch64*) _carch="arm64" ;;
arm*) _carch="arm" ;;
ppc*) _carch="powerpc" ;;
esac

HOSTCC="${CC:-gcc}"
HOSTCC="${HOSTCC#${CROSS_COMPILE}}"

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="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
		silentoldconfig
}

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

build() {
	cd "$srcdir"/build
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
		|| return 1
}

package() {
	cd "$srcdir"/build

	mkdir -p "$pkgdir"/boot "$pkgdir"/lib/modules

	local _install
	case "$CARCH" in
	aarch64*|arm*)	_install="zinstall dtbs_install" ;;
	*)		_install="install" ;;
	esac

	make -j1 modules_install firmware_install $_install \
		ARCH="$_carch" \
		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_PATH="$pkgdir"/boot \
		INSTALL_DTBS_PATH="$pkgdir"/usr/lib/linux-${_abi_release} \
		|| 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 bash"
	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="$dir" ARCH="$_carch" HOSTCC="$HOSTCC" \
		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="9a78fa2eb6c68ca5a40ed5af08142599  linux-4.4.tar.xz
60722f3f87ee4b7e74ee6999ae810f51  config-vanilla.aarch64
bc89928ff4a687c11d3bcc3f79d44132  config-vanilla.armhf
32be41a1abad4eefdf491907b257737f  config-vanilla.x86
080b647a731c6013d150a370b745f158  config-vanilla.x86_64
71cb405e6342cd1e07d5819d4b300f7d  config-vanilla.ppc
3eaa6ab780e1194cabf811d3e894ef30  config-vanilla.ppc64le
e10e580b7aadf42ba595e35d3ff3fc69  0001-Add-dts-for-GIGABYTE-X-Gene-MP30-AR0.patch
4140c092d355a837ccab1707c8ad0d33  patch-4.4.47.xz"
sha256sums="401d7c8fef594999a460d10c72c5a94e9c2e1022f16795ec51746b0d165418b2  linux-4.4.tar.xz
2bde88a9393d93b3bff368706aeb467b8fa8e1459877c3ba9db7f90cba96e824  config-vanilla.aarch64
83cfbe20ba8c5d8b9a540c6bd55a26c31fe6928abf08881131901a47152dd2aa  config-vanilla.armhf
16c33fa4b2f41f76c42610c46271ab9ab09618cc70720b5bc33ed9e1611122c8  config-vanilla.x86
530a9bfbfae90e103de41bf77e5897eda50687dcef286b2465d3f90b74151208  config-vanilla.x86_64
9a3a0019de416dad7c487ba7c022609baf4fd65599c73a0ea370ff12f8f5df8d  config-vanilla.ppc
be575bd67f224df227319a511814a1cbd2db9c7cc8f80532ec844d786527652d  config-vanilla.ppc64le
b9bcbe11c017764075179fb61fb13f6d0eca2c5495402d8f4ace2331cfe0c0b4  0001-Add-dts-for-GIGABYTE-X-Gene-MP30-AR0.patch
21fd72caa322800b4668b4464d6ac4d8d66faa0056e08a5925d5911dab438c18  patch-4.4.47.xz"
sha512sums="13c8459933a8b80608e226a1398e3d1848352ace84bcfb7e6a4a33cb230bbe1ab719d4b58e067283df91ce5311be6d2d595fc8c19e2ae6ecc652499415614b3e  linux-4.4.tar.xz
5fb62b82d23566fe0d0ce6cfff258a4a044ce0d968d81ccd10da6073dc7c30ad21e18b3be14fe36635a7e46793c5ce4c6184847917706fec733c584a2c14ac54  config-vanilla.aarch64
0ed4e87ef8ff5f38ed36bfe19faa7c4b0c45c6abb55e943fa1dd18798028bd545527c7b6e04e3c3ae89160e9567975cec9f9c5fb50c5f73b39cf347005cf4650  config-vanilla.armhf
191307370b90fdbefd8182fe7bb5f2e2e21db74efeb560672cc4088b51bf9542ec4ca7d7556a14e34219183bdb36ebb9fa324dddda4ad5cc3cca347d073ecdb7  config-vanilla.x86
b3146ef4a16aa3caf79cc3bef57144a718afc644718eaecd02e72c028a8831efc5cbd87afe1bd3056a4f8788abd8ddffc15265b848146b198719015fb93e649d  config-vanilla.x86_64
ee565e219530bcfaf5cade2622432cfb83743bdbbfc388781901461f19ca553b7fdee3c81ce6b34225ef78a209eb60088630284fcbb0430947aad77a5d8a0865  config-vanilla.ppc
47699009e208e8dec52a3fd77471f85a24d0c30a663a56e17c3063113e3c3dd32e46e17fd99b4f4b6e1e6202ce48747c60700c0c9ae097a46167bdacfa3e330b  config-vanilla.ppc64le
ebc1b89ff0985246889f68c32fb0bd326eb0f015a97b913bf8e2b92855c75809d114c57aff8f3f74d120694f1c5891d7a11ebe4aadaadd1954a947e762bf121d  0001-Add-dts-for-GIGABYTE-X-Gene-MP30-AR0.patch
f52936ab1dc91314a3cede35f9116332ce999b6442bdb575eda68dd2e57cd96517abc18b3bb05a2492e6cd13f849a09cece13463dfaa2d81ad390f8127b62813  patch-4.4.47.xz"