# $Id$

PNAME="grub"
PVER="2.02"
PBUILD="r3"

PCAT="sys-apps"

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

DEPEND=">= sys-apps/mage-release-1
	>= sys-libs/ncurses-5.9
	>= sys-dev/gettext-0.19
	>= sys-libs/zlib-1.2.5
	>= media-libs/freetype-2.5
	>= app-arch/xz-utils-5
	>= sys-apps/os-prober-1.56
	>= sys-fs/device-mapper-2.02
	>= sys-fs/dosfstools-4.1"

SDEPEND=">= dev-util/pkgconfig-0.25"

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

sminclude mtools

# grub.confd revision
CONF_REV=1.4

SRC_URI=(
	gnu://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${PNAME}-2.02-confd-2.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}-2.02-gcc8.patch
	mirror://${PNAME}/${PNAME}-2.02-x86_64_PLT32.patch
	mirror://${PNAME}/grub.confd-${CONF_REV}
)

UP2DATE="updatecmd_gnu ${PNAME} gz"

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

src_prepare()
{
	munpack ${SRCFILE} || die
	cd ${SRCDIR}

	# use /etc/conf.d/grub instead of /etc/default/grub
	mpatch ${PNAME}-2.02-confd-2.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
	# fix build with gcc8
	mpatch ${PNAME}-2.02-gcc8.patch || die
	# fix x86_64_plt32 issues with 32bit builds
	mpatch ${PNAME}-2.02-x86_64_PLT32.patch || die

	# setup build dirs
	install -d ${SRCDIR}/build_bios || die
	install -d ${SRCDIR}/build_efi || die
}

src_compile()
{
	local myconf
	local myarch

	# common configure options
	# grub-mount requires fuse2
	# grub-mkfont requires freetype2
	myconf="--prefix=/usr
		--host=${CHOST}
		--build=${CHOST}
		--mandir=/usr/share/man
		--infodir=/usr/share/info
		--datadir=/usr/share
		--sysconfdir=/etc
		--localstatedir=/var/lib
		--libdir=/usr/$(mlibdir)
		--disable-static
		--enable-shared
		--disable-efiemu
		--disable-werror
		--enable-device-mapper
		--enable-grub-mkfont
		--disable-grub-mount"

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

	# build bios version
	cd ${SRCDIR}/build_bios
	myarch="i386"
	../configure --with-platform=pc --target="${myarch}" ${myconf} || die
	mmake || die

	# build efi version
	cd ${SRCDIR}/build_efi
	case ${ARCH} in
		x86_64) myarch="${ARCH}" ;;
		i*86) myarch="i386" ;;
	esac
	../configure --with-platform=efi --target="${myarch}" ${myconf} || die
	mmake || die
}

src_install()
{
	local myarch

	# install bios version
	cd ${SRCDIR}/build_bios
	mmake DESTDIR=${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

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

	# 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

	# 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
}