# $Id$

PNAME="grub"
PVER="2.06"
PBUILD="r6"

PCAT="sys-apps"

DESCRIPTION="GNU GRUB2 boot loader."
HOMEPAGE="http://www.gnu.org/software/grub/"

DEPEND=">= sys-apps/mage-release-1
	>= sys-libs/ncurses-6.4
	>= sys-dev/gettext-0.22
	>= sys-libs/zlib-1.2
	>= media-libs/freetype-2.13
	>= virtual/xz-utils
	>= sys-apps/os-prober-1.56
	>= sys-fs/device-mapper-2.02
	>= sys-fs/dosfstools-4.2
	>= sys-apps/efibootmgr-18"

SDEPEND=">= virtual/pkgconfig
	>= net-misc/rsync-3
	>= app-text/help2man-1
	>= sys-dev/autogen-5
	>= sys-dev/autoconf-10
	>= sys-dev/automake-10"

SRCFILE="${PNAME}-${PVER}.tar.gz"
SRCDIR="${BUILDDIR}/${PNAME}-${PVER}"

UNIFONT_PVER=15.0.06
UNIFONT_SRCFILE="unifont-${UNIFONT_PVER}.pcf.gz"

if [[ ${GRUB_GIT_SOURCE} = 1 ]]
then
	GNULIB_SRCFILE="gnulib-20230809.tar.bz2"
	GNULIB_SRCDIR="${BUILDDIR}/gnulib"
fi

sminclude mtools

# grub.confd revision
CONF_REV=1.4

# grub sources from git
# 1=yes; 0=no
GRUB_GIT_SOURCE=0

# build ia32 on x64 platforms
# 1=yes; 0=no
BUILD_X64_IA32=1

msetfeature "!strip static !ccache !distcc"

SRC_URI=(
	gnu://${PNAME}/${SRCFILE}
	https://unifoundry.com/pub/unifont/unifont-${UNIFONT_PVER}/font-builds/${UNIFONT_SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${UNIFONT_SRCFILE}
	mirror://${PNAME}/${PNAME}-2.06-confd.patch
	mirror://${PNAME}/${PNAME}-2.02-cosmetic.patch
	mirror://${PNAME}/${PNAME}-2.00-10_linux-pretty-names-from-etc-os-release.patch
	mirror://${PNAME}/${PNAME}-2.06-e2fsprogs-1.47-fixes.patch
	mirror://${PNAME}/grub.confd-${CONF_REV}
)

if [[ ${GRUB_GIT_SOURCE} = 1 ]]
then
	SRC_URI+=( mirror://${PNAME}/${GNULIB_SRCFILE} )
fi

UP2DATE="updatecmd_gnu ${PNAME} gz"

# grub doesn't like CFLAG optimation,
# and do you really want that at your bootloader ??
unset CFLAGS
unset CXXFLAGS
unset LTOFLAGS

src_prepare()
{
	munpack ${SRCFILE} || die
	if [[ ${GRUB_GIT_SOURCE} = 1 ]]
	then
		munpack ${GNULIB_SRCFILE} || die
	fi
	cd ${SRCDIR}

	# upstream fixes
	mpatch -Np1 ${PNAME}-2.06-e2fsprogs-1.47-fixes.patch || die

	# use /etc/conf.d/grub instead of /etc/default/grub
	mpatch ${PNAME}-2.06-confd.patch || die
	# cosmetic fixes
	mpatch ${PNAME}-2.02-cosmetic.patch || die
	# generate pretty names from os-release if GRUB_DISTRIBUTOR is not set
	mpatch ${PNAME}-2.00-10_linux-pretty-names-from-etc-os-release.patch

	# http://savannah.gnu.org/bugs/?40330 and https://bugs.archlinux.org/task/37847
	gzip -cd ${SOURCEDIR}/${PNAME}/${UNIFONT_SRCFILE} > unifont.bdf || die

	if [[ ${GRUB_GIT_SOURCE} = 1 ]]
	then
		# run bootstrap (only required for versions from git)
		./bootstrap --gnulib-srcdir=${GNULIB_SRCDIR} --no-git || die
	fi

	# regen aclocal with automake 1.16
	WANT_AUTOMAKE=1.16 ./autogen.sh || die

	# setup build dirs
	cp -r ${SRCDIR} ${BUILDDIR}/build_bios || die
	cp -r ${SRCDIR} ${BUILDDIR}/build_efi || die
	if [[ ${ARCH} = x86_64 ]] && [[ ${BUILD_X64_IA32} = 1 ]]
	then
		cp -r ${SRCDIR} ${BUILDDIR}/build_efi_ia32 || die
	fi
}

src_compile()
{
	local myconf
	local myarch
	local efiemu

	# common configure options
	# grub-mount requires fuse3
	# grub-mkfont requires freetype2
	myconf="--prefix=/usr
		--mandir=/usr/share/man
		--infodir=/usr/share/info
		--datarootdir=/usr/share
		--sysconfdir=/etc
		--localstatedir=/var/lib
		--libdir=/usr/$(mlibdir)
		--disable-static
		--enable-shared
		--enable-nls
		--disable-werror
		--disable-silent-rules
		--enable-device-mapper
		--enable-cache-stats
		--enable-boot-time
		--enable-grub-mkfont
		--disable-grub-mount
		--with-bootdir=/boot
		--with-grubdir=grub"

	# fix freetype build issues
	export FREETYPE="pkg-config freetype2"
	export BUILD_FREETYPE="pkg-config freetype2"

	# set version
	export PACKAGE_VERSION="${PVER}-${PBUILD}"

	# unset all build flags
	unset CFLAGS
	unset CPPFLAGS
	unset CXXFLAGS
	unset LDFLAGS
	unset LTOFLAGS
	unset MAKEFLAGS
	unset MAKEOPTS

	# build bios version
	cd ${BUILDDIR}/build_bios
	myarch="i386"

	if [[ ${ARCH} = x86_64 ]]
	then
		efiemu="--enable-efiemu"
	else
		efiemu="--disable-efiemu"
	fi

	./configure --with-platform=pc --target="${myarch}" ${myconf} ${efiemu} || die
	make || die

	# build efi version
	cd ${BUILDDIR}/build_efi
	case ${ARCH} in
		x86_64) myarch="${ARCH}" ;;
		i*86) myarch="i386" ;;
	esac

	efiemu="--disable-efiemu"

	./configure --with-platform=efi --target="${myarch}" ${myconf} ${efiemu} || die
	make || die

	# build ia32 efi version on x86_64
	if [[ ${ARCH} = x86_64 ]] && [[ ${BUILD_X64_IA32} = 1 ]]
	then
		cd ${BUILDDIR}/build_efi_ia32
		myarch="i386"
		efiemu="--disable-efiemu"

		./configure --with-platform=efi --target="${myarch}" ${myconf} ${efiemu} || die
		make || die
	fi
}

src_install()
{
	local myarch

	# install efi version first
	cd ${BUILDDIR}/build_efi
	case ${ARCH} in
		x86_64) myarch="${ARCH}" ;;
		i*86) myarch="i386" ;;
	esac
	make DESTDIR=${BINDIR} install || die
	# remove debugging related files
	mdelete /usr/$(mlibdir)/grub/${myarch}-efi/\*.module || die
	#mdelete -f /usr/$(mlibdir)/grub/${myarch}-efi/\*.image || die # may or may not exist
	mdelete /usr/$(mlibdir)/grub/${myarch}-efi/kernel.exec || die
	mdelete /usr/$(mlibdir)/grub/${myarch}-efi/gdb_grub || die
	mdelete /usr/$(mlibdir)/grub/${myarch}-efi/gmodule.pl || die

	# install efi_ia32 version
	if [[ ${ARCH} = x86_64 ]] && [[ ${BUILD_X64_IA32} = 1 ]]
	then
		cd ${BUILDDIR}/build_efi_ia32
		myarch="i386"

		make DESTDIR=${BINDIR} install || die
		# remove debugging related files
		mdelete /usr/$(mlibdir)/grub/${myarch}-efi/\*.module || die
		#mdelete -f /usr/$(mlibdir)/grub/${myarch}-efi/\*.image || die # may or may not exist
		mdelete /usr/$(mlibdir)/grub/${myarch}-efi/kernel.exec || die
		mdelete /usr/$(mlibdir)/grub/${myarch}-efi/gdb_grub || die
		mdelete /usr/$(mlibdir)/grub/${myarch}-efi/gmodule.pl || die
	fi

	# install bios version last
	cd ${BUILDDIR}/build_bios
	make DESTDIR=${BINDIR} install || die
	# remove debugging related files
	mdelete /usr/$(mlibdir)/grub/i386-pc/\*.module || die
	mdelete /usr/$(mlibdir)/grub/i386-pc/\*.image || die
	mdelete /usr/$(mlibdir)/grub/i386-pc/kernel.exec || die
	mdelete /usr/$(mlibdir)/grub/i386-pc/gdb_grub || die
	mdelete /usr/$(mlibdir)/grub/i386-pc/gmodule.pl || die

	# not required by pretty name patch anymore
	# set distribution
	#echo 'GRUB_DISTRIBUTOR="Magellan-Linux"' >> ${BINDIR}/usr/share/grub/grub-mkconfig_lib || die

	# setup a proper grub default conf
	minstallconf grub.confd-${CONF_REV} grub || die

	# enable a splash screen by default
	sed -i '/^GRUB_CMDLINE_LINUX_DEFAULT=/s:\"\(.*\)\":\"\1 splash\":' ${BINDIR}/etc/conf.d/grub || die

	# needed dir
	minstalldir /boot/grub || die

	# install unifont
	minstalldir /usr/share/fonts/unifont || die
	gunzip -c ${SOURCEDIR}/${PNAME}/${UNIFONT_SRCFILE} > ${BINDIR}/usr/share/fonts/unifont/unifont.pcf || die

	# docs
	cd ${SRCDIR}
	minstalldocs AUTHORS ChangeLog COPYING NEWS README THANKS TODO || die
}

preinstall()
{
	mount /boot &> /dev/null
}

postinstall()
{
	[ ! -d ${MROOT}/boot/grub ] && install -d ${MROOT}/boot/grub

	# creates some essential links
	[ ! -e ${MROOT}/boot/boot ] && ln -sf . ${MROOT}/boot/boot

	if [[ -z ${MROOT} ]] || [[ ${MROOT} = / ]] && [[ ${MAGE_BOOTSTRAP} != true ]]
	then
		# create a device.map
		if [[ ! -f /boot/grub/device.map ]]
		then
			if [[ -x $(type -P grub-mkdevicemap) ]]
			then
				grub-mkdevicemap
			fi
		fi

		# needed by grub-mkconfig on the first run
		if [[ ! -f /boot/grub/video.lst ]]
		then
			install -m0644 /$(mlibdir)/grub/*/video.lst /boot/grub/video.lst
		fi

		# update grub.cfg
		LC_ALL=C grub-mkconfig -o /boot/grub/grub.cfg

		# install bootloader to disk
		#local bootpartition="$(df -h /boot |(read; awk '{print $1; exit}'))"
		local bootdisk
		bootdisk="$(grub-probe --target=drive /boot | sed 's:(\(.*\),.*):(\1):')"

		# Generate core.img, but don't let it be installed in boot sector
		grub-install --no-floppy "${bootdisk}"
	fi
}