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

setvar _mainflavor = 'hardened'
setvar pkgname = "linux-$_mainflavor"
setvar pkgver = '4.9.54'
case (pkgver) {
*.*.* {	setvar _kernver = ${pkgver%.*}}
*.* {	setvar _kernver = ${pkgver}}
}
setvar pkgrel = '0'
setvar pkgdesc = ""Linux kernel with hardening patches""
setvar url = ""http://alpinelinux.org""
setvar depends = ""mkinitfs""
setvar makedepends = ""perl sed installkernel bash gmp-dev bc linux-headers mpfr-dev
	mpc1-dev elfutils-dev""
setvar options = ""!strip !check""
setvar install = ''
setvar source = ""https://kernel.org/pub/linux/kernel/v4.x/linux-$_kernver.tar.xz
	https://kernel.org/pub/linux/kernel/v4.x/patch-$pkgver.xz
	http://dev.alpinelinux.org/~ncopa/grsec/hardened-3.1-$pkgver-201704252333-alpine.patch
	0001-HID-apple-fix-Fn-key-Magic-Keyboard-on-bluetooth.patch

	zfs-fix.patch
	config-hardened.x86
	config-hardened.x86_64
	config-hardened.armhf

	config-virthardened.x86
	config-virthardened.x86_64
	""
setvar subpackages = ""$pkgname-dev:_dev""
setvar _flavors = ''
for _i in $source {
	case (_i) {
	config-*.$CARCH {
		setvar _f = ${_i%.$CARCH}
		setvar _f = ${_f#config-}
		setvar _flavors = ""$_flavors ${_f}""
		if test "linux-$_f" != $pkgname {
			setvar subpackages = ""$subpackages linux-${_f} linux-${_f}-dev:_dev""
		}
		}
	}
}

setvar arch = ""x86 x86_64 armhf""
setvar license = ""GPL2""

proc prepare {
	local _patch_failed=
	cd "$srcdir"/linux-$_kernver
	if test ${pkgver%.0} = $pkgver {
		msg "Applying patch-$pkgver.xz"
		unxz -c < "$srcdir"/patch-$pkgver.xz | patch -p1 -N || return 1
	}

	# first apply patches in specified order
	for i in $source {
		local file=${i%::*}
		case (file) {
		*.patch {
			msg "Applying $file..."
			if ! patch -s -p1 -N -i "$srcdir"/${file##*/} {
				echo $file >>failed
				setvar _patch_failed = '1'
			}
			}
		}
	}

	if ! test -z $_patch_failed {
		error "The following patches failed:"
		cat failed
		return 1
	}

	# remove localversion from patch if any
	rm -f localversion*

	for i in $_flavors {
		local _config=config-$i.${CARCH}
		local _builddir="$srcdir"/build-$i
		mkdir -p $_builddir
		echo "-$pkgrel-$i" > "$srcdir"/build-$i/localversion-alpine \
			|| return 1

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

proc build {
	for i in $_flavors {
		cd "$srcdir"/build-$i
		make CC="${CC:-gcc}" \
			KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
			|| return 1
	}
}

proc _package {
	local _buildflavor="$1" _outdir="$2"
	local _abi_release=${pkgver}-${pkgrel}-${_buildflavor}

	cd "$srcdir"/build-$_buildflavor || return 1

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

	local _install
	case (CARCH) {
	arm* {
		local _dtbdir="$_outdir"/usr/lib/linux-${_abi_release}
		mkdir -p $_dtbdir
		for i in arch/arm/boot/dts/*.dtb  {
			install -m644 $i $_dtbdir
		}

		setvar _install = 'zinstall'
		}
	* {
		setvar _install = 'install'
		}
	}

	make -j1 modules_install firmware_install $_install \
		INSTALL_MOD_PATH="$_outdir" \
		INSTALL_PATH="$_outdir"/boot \
		|| return 1

	rm -f "$_outdir"/lib/modules/${_abi_release}/build \
		"$_outdir"/lib/modules/${_abi_release}/source
	rm -rf "$_outdir"/lib/firmware

	install -D include/config/kernel.release \
		"$_outdir"/usr/share/kernel/$_buildflavor/kernel.release
}

# main flavor installs in $pkgdir
proc package {
	setvar depends = ""$depends linux-firmware""
	setvar provides = ""linux-grsec=${pkgver}-r${pkgrel}""

	_package hardened $pkgdir
}

# subflavors install in $subpkgdir
proc virthardened {
	setvar provides = ""linux-virtgrsec=${pkgver}-r${pkgrel}""

	_package virthardened $subpkgdir
}

proc _dev {
	local _flavor=$(echo $subpkgname | sed -E 's/(^linux-|-dev$)//g')
	local _abi_release=${pkgver}-${pkgrel}-$_flavor
	# 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
	#
	setvar pkgdesc = ""Headers and script for third party modules for $_flavor kernel""
	setvar depends = ""gmp-dev bash""
	local dir="$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-$_flavor.${CARCH} "$dir"/.config
	echo "-$pkgrel-$_flavor" > "$dir"/localversion-alpine \
		|| return 1
	make -j1 -C "$srcdir"/linux-$_kernver O="$dir" HOSTCC="${CC:-gcc}" \
		silentoldconfig prepare modules_prepare scripts

	# remove the stuff that points 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/ubuntu/ubuntu-zesty.git/tree/debian/rules.d/3-binary-indep.mk
	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' ')' \
		-print | cpio -pdm $dir || return 1

	cp -a scripts include $dir || return 1
	find $(find arch -name include -type d -print) -type f \
		| cpio -pdm $dir

	install -Dm644 "$srcdir"/build-$_flavor/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
}

setvar sha512sums = ""bf67ff812cc3cb7e5059e82cc5db0d9a7c5637f7ed9a42e4730c715bf7047c81ed3a571225f92a33ef0b6d65f35595bc32d773356646df2627da55e9bc7f1f1a  linux-4.9.tar.xz
8ce2dbab8b8a94ef593eb40fc07b236c7b746a0eb099509fbe23ecde213384d535ad8ff4695b9cef2c5a78ecd6590fa8ded6e36c7ee17ef8dadb649ec5c074e2  patch-4.9.54.xz
bf528ec62747d2a7e25d9296233cb53964ddd2485dfc7f635c6bc138b787b412e195783bc1ac825e51a6255948a17f116921ae619d05e47de06e69acac545147  hardened-3.1-4.9.54-201704252333-alpine.patch
5373728be2b507c3db5e042e1d768740df7965078868afdc46418b1adc4cae3d8f9f1aedb59975a0f2acf8754340499354fcf97c503397a5d9886ccc9689b782  0001-HID-apple-fix-Fn-key-Magic-Keyboard-on-bluetooth.patch
5a0a78e6de11eb8180d96830b9faa9ac560586f7beb663c8196a16ac6232b5008b9181b3c9b94e2b13a444acba4b6e80a3408d34606432f92eb4d169c3953d5d  zfs-fix.patch
9ded64c5158526784bbf7b6fc037f18e7c0e74bbad1774a13f5b95910b30f4c2c156592cc219f9cdf6685eb875f79674bad317e7f8e5034ddc39eed0ab64f447  config-hardened.x86
c54b96666b7a39cd50d0bb2a2fccef0f3f7a17ffa91f19685dfdb00ea877cd6c1603a367fee3891a594f1242b1e33a2ff265ab98c06e138aa3dd5f880a0b20c3  config-hardened.x86_64
44e51cb6d54725f1de2a1700a801868de8f5e8b23b8cd2c8f936b22d46bb06ab2a3cec7bdedd2fbfc9272986db71ae072c2b96689e05304806bc3bda88e12a79  config-hardened.armhf
8c05c51738b979225bfe46614eeddce85776ef05cfd8946c7c2ab7445981c43cf89c941c51ad689f437dc3705777f050e137c32095ef5a7451bb396cecaeac6b  config-virthardened.x86
d822f2cb4faf618e485f7a51cbe3c5e819187fd1f70d9346d5e56712e6d815483708f48f6991a3b9f3b638d2c957941f6a861124237970b853227eeb0c665f76  config-virthardened.x86_64""