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# Maintainer : Christian Hesse <mail@eworm.de>
# Maintainer : Ronald van Haren <ronald.archlinux.org>
# Contributor: Tobias Powalowski <tpowa@archlinux.org>
# Contributor: Keshav Amburay <(the ddoott ridikulus ddoott rat) (aatt) (gemmaeiil) (ddoott) (ccoomm)>

## "1" to enable IA32-EFI build in Arch x86_64, "0" to disable
_IA32_EFI_IN_ARCH_X64="1"

## "1" to enable EMU build, "0" to disable
_GRUB_EMU_BUILD="0"

_GRUB_EXTRAS_COMMIT="8a245d5c1800627af4cefa99162a89c7a46d8842"
_GNULIB_COMMIT="be584c56eb1311606e5ea1a36363b97bddb6eed3"
_UNIFONT_VER="12.1.04"

[[ "${CARCH}" == "x86_64" ]] && _EFI_ARCH="x86_64"
[[ "${CARCH}" == "i686" ]] && _EFI_ARCH="i386"

[[ "${CARCH}" == "x86_64" ]] && _EMU_ARCH="x86_64"
[[ "${CARCH}" == "i686" ]] && _EMU_ARCH="i386"

pkgname='grub-libzfs'
pkgdesc='GNU GRand Unified Bootloader (2) - libzfs support'
_pkgver=2.04
pkgver=${_pkgver/-/}
pkgrel=4
epoch=2
url='https://www.gnu.org/software/grub/'
arch=('x86_64')
license=('GPL3')
backup=('etc/default/grub'
        'etc/grub.d/40_custom')
install="${pkgname}.install"
options=('!makeflags')

conflicts=('grub-common' 'grub-bios' 'grub-emu' "grub-efi-${_EFI_ARCH}" 'grub-legacy' 'grub')
replaces=('grub-common' 'grub-bios' 'grub-emu' "grub-efi-${_EFI_ARCH}" 'grub')
provides=('grub-common' 'grub-bios' 'grub-emu' "grub-efi-${_EFI_ARCH}" 'grub')

makedepends=('git' 'rsync' 'xz' 'freetype2' 'ttf-dejavu' 'python' 'autogen'
             'texinfo' 'help2man' 'gettext' 'device-mapper' 'fuse2')
depends=('sh' 'xz' 'gettext' 'device-mapper' 'zfs-utils')
optdepends=('freetype2: For grub-mkfont usage'
            'fuse2: For grub-mount usage'
            'dosfstools: For grub-mkrescue FAT FS and EFI support'
            'efibootmgr: For grub-install EFI support'
            'libisoburn: Provides xorriso for generating grub rescue iso using grub-mkrescue'
            'os-prober: To detect other OSes when generating grub.cfg in BIOS systems'
            'mtools: For grub-mkrescue FAT FS support')

if [[ "${_GRUB_EMU_BUILD}" == "1" ]]; then
    makedepends+=('libusbx' 'sdl')
    optdepends+=('libusbx: For grub-emu USB support'
                 'sdl: For grub-emu SDL support')
fi

validpgpkeys=('E53D497F3FA42AD8C9B4D1E835A93B74E82E4209'  # Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
              'BE5C23209ACDDACEB20DB0A28C8189F1988C2166'  # Daniel Kiper <dkiper@net-space.pl>
              '95D2E9AB8740D8046387FD151A09227B1F435A33') # Paul Hardy <unifoundry@unifoundry.com>

source=("git+https://git.savannah.gnu.org/git/grub.git#tag=grub-${_pkgver}?signed"
        "git+https://git.savannah.gnu.org/git/grub-extras.git#commit=${_GRUB_EXTRAS_COMMIT}"
        "git+https://git.savannah.gnu.org/git/gnulib.git#commit=${_GNULIB_COMMIT}"
        "http://unifoundry.com/pub/unifont/unifont-${_UNIFONT_VER}/font-builds/unifont-${_UNIFONT_VER}.bdf.gz"{,.sig}
        '0003-10_linux-detect-archlinux-initramfs.patch'
        '0004-add-GRUB_COLOR_variables.patch'
        'grub.default')

sha256sums=('SKIP'
            'SKIP'
            'SKIP'
            'bab15252ad82d20d5b107965f3b31de9efbce82f0a3f0b7bbf6dd142e42b0710'
            'SKIP'
            '171415ab075d1ac806f36c454feeb060f870416f24279b70104bba94bd6076d4'
            'a5198267ceb04dceb6d2ea7800281a42b3f91fd02da55d2cc9ea20d47273ca29'
            '690adb7943ee9fedff578a9d482233925ca3ad3e5a50fffddd27cf33300a89e3')

_backports=(
	# grub-mkconfig: Use portable "command -v" to detect installed programs
	'28a7e597de0d5584f65e36f9588ff9041936e617'
)

_configure_options=(
	FREETYPE="pkg-config freetype2"
	BUILD_FREETYPE="pkg-config freetype2"
	--enable-mm-debug
	--enable-nls
	--enable-device-mapper
	--enable-cache-stats
	--enable-grub-mkfont
	--enable-grub-mount
	--enable-libzfs
	--prefix="/usr"
	--bindir="/usr/bin"
	--sbindir="/usr/bin"
	--mandir="/usr/share/man"
	--infodir="/usr/share/info"
	--datarootdir="/usr/share"
	--sysconfdir="/etc"
	--program-prefix=""
	--with-bootdir="/boot"
	--with-grubdir="grub"
	--disable-silent-rules
	--disable-werror
)

prepare() {
	cd "${srcdir}/grub/"

	echo "Apply backports..."
	local _c
	for _c in "${_backports[@]}"; do
		git log --oneline -1 "${_c}"
		git cherry-pick -n "${_c}"
	done

	echo "Patch to detect of Arch Linux initramfs images by grub-mkconfig..."
	patch -Np1 -i "${srcdir}/0003-10_linux-detect-archlinux-initramfs.patch"

	echo "Patch to enable GRUB_COLOR_* variables in grub-mkconfig..."
	## Based on http://lists.gnu.org/archive/html/grub-devel/2012-02/msg00021.html
	patch -Np1 -i "${srcdir}/0004-add-GRUB_COLOR_variables.patch"

	echo "Fix DejaVuSans.ttf location so that grub-mkfont can create *.pf2 files for starfield theme..."
	sed 's|/usr/share/fonts/dejavu|/usr/share/fonts/dejavu /usr/share/fonts/TTF|g' -i "configure.ac"

	echo "Fix mkinitcpio 'rw' FS#36275..."
	sed 's| ro | rw |g' -i "util/grub.d/10_linux.in"

	echo "Fix OS naming FS#33393..."
	sed 's|GNU/Linux|Linux|' -i "util/grub.d/10_linux.in"

	echo "Pull in latest language files..."
	./linguas.sh

	echo "Avoid problem with unifont during compile of grub..."
	# http://savannah.gnu.org/bugs/?40330 and https://bugs.archlinux.org/task/37847
	gzip -cd "${srcdir}/unifont-${_UNIFONT_VER}.bdf.gz" > "unifont.bdf"

	echo "Run bootstrap..."
	./bootstrap \
		--gnulib-srcdir="${srcdir}/gnulib/" \
		--no-git

	echo "Make translations reproducible..."
	sed -i '1i /^PO-Revision-Date:/ d' po/*.sed
}

_build_grub-common_and_bios() {
	echo "Set ARCH dependent variables for bios build..."
	if [[ "${CARCH}" == 'x86_64' ]]; then
		_EFIEMU="--enable-efiemu"
	else
		_EFIEMU="--disable-efiemu"
	fi

	echo "Copy the source for building the bios part..."
	cp -r "${srcdir}/grub/" "${srcdir}/grub-bios/"
	cd "${srcdir}/grub-bios/"

	echo "Add the grub-extra sources for bios build..."
	install -d "${srcdir}/grub-bios/grub-extras"
	cp -r "${srcdir}/grub-extras/915resolution" \
		"${srcdir}/grub-bios/grub-extras/915resolution"
	export GRUB_CONTRIB="${srcdir}/grub-bios/grub-extras/"

	echo "Unset all compiler FLAGS for bios build..."
	unset CFLAGS
	unset CPPFLAGS
	unset CXXFLAGS
	unset LDFLAGS
	unset MAKEFLAGS

	echo "Run ./configure for bios build..."
	./configure \
		--with-platform="pc" \
		--target="i386" \
		"${_EFIEMU}" \
		--enable-boot-time \
		"${_configure_options[@]}"

	if [ ! -z "${SOURCE_DATE_EPOCH}" ]; then
		echo "Make info pages reproducible..."
		touch -d "@${SOURCE_DATE_EPOCH}" $(find -name '*.texi')
	fi

	echo "Run make for bios build..."
	make
}

_build_grub-efi() {
	echo "Copy the source for building the ${_EFI_ARCH} efi part..."
	cp -r "${srcdir}/grub/" "${srcdir}/grub-efi-${_EFI_ARCH}/"
	cd "${srcdir}/grub-efi-${_EFI_ARCH}/"

	echo "Unset all compiler FLAGS for ${_EFI_ARCH} efi build..."
	unset CFLAGS
	unset CPPFLAGS
	unset CXXFLAGS
	unset LDFLAGS
	unset MAKEFLAGS

	echo "Run ./configure for ${_EFI_ARCH} efi build..."
	./configure \
		--with-platform="efi" \
		--target="${_EFI_ARCH}" \
		--disable-efiemu \
		--enable-boot-time \
		"${_configure_options[@]}"

	echo "Run make for ${_EFI_ARCH} efi build..."
	make
}

_build_grub-emu() {
	echo "Copy the source for building the emu part..."
	cp -r "${srcdir}/grub/" "${srcdir}/grub-emu/"
	cd "${srcdir}/grub-emu/"

	echo "Unset all compiler FLAGS for emu build..."
	unset CFLAGS
	unset CPPFLAGS
	unset CXXFLAGS
	unset LDFLAGS
	unset MAKEFLAGS

	echo "Run ./configure for emu build..."
	./configure \
		--with-platform="emu" \
		--target="${_EMU_ARCH}" \
		--enable-grub-emu-usb=no \
		--enable-grub-emu-sdl=no \
		--disable-grub-emu-pci \
		"${_configure_options[@]}"

	echo "Run make for emu build..."
	make
}

build() {
	cd "${srcdir}/grub/"

	echo "Build grub bios stuff..."
	_build_grub-common_and_bios

	echo "Build grub ${_EFI_ARCH} efi stuff..."
	_build_grub-efi

	if [[ "${CARCH}" == "x86_64" ]] && [[ "${_IA32_EFI_IN_ARCH_X64}" == "1" ]]; then
		echo "Build grub i386 efi stuff..."
		_EFI_ARCH="i386" _build_grub-efi
	fi

	if [[ "${_GRUB_EMU_BUILD}" == "1" ]]; then
		echo "Build grub emu stuff..."
		_build_grub-emu
	fi
}

_package_grub-common_and_bios() {
	cd "${srcdir}/grub-bios/"

	echo "Run make install for bios build..."
	make DESTDIR="${pkgdir}/" bashcompletiondir="/usr/share/bash-completion/completions" install

	echo "Remove gdb debugging related files for bios build..."
	rm -f "${pkgdir}/usr/lib/grub/i386-pc"/*.module || true
	rm -f "${pkgdir}/usr/lib/grub/i386-pc"/*.image || true
	rm -f "${pkgdir}/usr/lib/grub/i386-pc"/{kernel.exec,gdb_grub,gmodule.pl} || true

	echo "Install /etc/default/grub (used by grub-mkconfig)..."
	install -D -m0644 "${srcdir}/grub.default" "${pkgdir}/etc/default/grub"
}

_package_grub-efi() {
	cd "${srcdir}/grub-efi-${_EFI_ARCH}/"

	echo "Run make install for ${_EFI_ARCH} efi build..."
	make DESTDIR="${pkgdir}/" bashcompletiondir="/usr/share/bash-completion/completions" install

	echo "Remove gdb debugging related files for ${_EFI_ARCH} efi build..."
	rm -f "${pkgdir}/usr/lib/grub/${_EFI_ARCH}-efi"/*.module || true
	rm -f "${pkgdir}/usr/lib/grub/${_EFI_ARCH}-efi"/*.image || true
	rm -f "${pkgdir}/usr/lib/grub/${_EFI_ARCH}-efi"/{kernel.exec,gdb_grub,gmodule.pl} || true
}

_package_grub-emu() {
	cd "${srcdir}/grub-emu/"

	echo "Run make install for emu build..."
	make DESTDIR="${pkgdir}/" bashcompletiondir="/usr/share/bash-completion/completions" install

	echo "Remove gdb debugging related files for emu build..."
	rm -f "${pkgdir}/usr/lib/grub/${_EMU_ARCH}-emu"/*.module || true
	rm -f "${pkgdir}/usr/lib/grub/${_EMU_ARCH}-emu"/*.image || true
	rm -f "${pkgdir}/usr/lib/grub/${_EMU_ARCH}-emu"/{kernel.exec,gdb_grub,gmodule.pl} || true
}

package() {
	cd "${srcdir}/grub/"

	echo "Package grub ${_EFI_ARCH} efi stuff..."
	_package_grub-efi

	if [[ "${CARCH}" == "x86_64" ]] && [[ "${_IA32_EFI_IN_ARCH_X64}" == "1" ]]; then
		echo "Package grub i386 efi stuff..."
		_EFI_ARCH="i386" _package_grub-efi
	fi

	if [[ "${_GRUB_EMU_BUILD}" == "1" ]]; then
		echo "Package grub emu stuff..."
		_package_grub-emu
	fi

	echo "Package grub bios stuff..."
	_package_grub-common_and_bios
}