# Copyright 1999-2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-boot/grub/grub-0.97-r9.ebuild,v 1.4 2009/05/15 21:11:24 maekke Exp $

# XXX: we need to review menu.lst vs grub.conf handling.  We've been converting
#      all systems to grub.conf (and symlinking menu.lst to grub.conf), but
#      we never updated any of the source code (it still all wants menu.lst),
#      and there is no indication that upstream is making the transition.

inherit mount-boot eutils flag-o-matic toolchain-funcs autotools multilib

PATCHVER="1.9" # Should match the revision ideally
DESCRIPTION="GNU GRUB Legacy boot loader"
HOMEPAGE="http://www.gnu.org/software/grub/"
SRC_URI="mirror://gentoo/${P}.tar.gz
	ftp://alpha.gnu.org/gnu/${PN}/${P}.tar.gz
	mirror://gentoo/${P}-patches-${PATCHVER}.tar.bz2"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="amd64 x86 ~x86-fbsd"
IUSE="custom-cflags ncurses netboot static"

DEPEND="ncurses? (
		>=sys-libs/ncurses-5.2-r5
		amd64? ( app-emulation/emul-linux-x86-baselibs )
	)"
PROVIDE="virtual/bootloader"

src_unpack() {
	unpack ${A}
	cd "${S}"

	# patch breaks booting for some people #111885
	rm "${WORKDIR}"/patch/400_*

	# Grub will not handle a kernel larger than EXTENDED_MEMSIZE Mb as
	# discovered in bug 160801. We can change this, however, using larger values
	# for this variable means that Grub needs more memory to run and boot. For a
	# kernel of size N, Grub needs (N+1)*2.  Advanced users should set a custom
	# value in make.conf, it is possible to make kernels ~16Mb in size, but it
	# needs the kitchen sink built-in.
	local t="custom"
	if [[ -z ${GRUB_MAX_KERNEL_SIZE} ]] ; then
		case $(tc-arch) in
			amd64) GRUB_MAX_KERNEL_SIZE=7 ;;
			x86)   GRUB_MAX_KERNEL_SIZE=3 ;;
		esac
		t="default"
	fi
	einfo "Grub will support the ${t} maximum kernel size of ${GRUB_MAX_KERNEL_SIZE} Mb (GRUB_MAX_KERNEL_SIZE)"

	sed -i \
		-e "/^#define.*EXTENDED_MEMSIZE/s,3,${GRUB_MAX_KERNEL_SIZE},g" \
		"${S}"/grub/asmstub.c \
		|| die "Failed to hack memory size"

	# UUID support
	epatch "${FILESDIR}/${P}-uuid.patch"
	epatch "${FILESDIR}/${P}-uuid_doc.patch"
	# Gfxmenu support
	epatch "${FILESDIR}/${P}-gfxmenu-v8.patch"

	if [[ -n ${PATCHVER} ]] ; then
		EPATCH_SUFFIX="patch"
		epatch "${WORKDIR}"/patch
		eautoreconf
	fi
}

src_compile() {
	filter-flags -fPIE #168834

	# Fix libvolume_id build (UUID)
	export CPPFLAGS="${CPPFLAGS} -I/usr/include -I/usr/$(get_libdir)/gcc/${CHOST}/$(gcc-fullversion)/include"

	use amd64 && multilib_toolchain_setup x86

	unset BLOCK_SIZE #73499

	### i686-specific code in the boot loader is a bad idea; disabling to ensure
	### at least some compatibility if the hard drive is moved to an older or
	### incompatible system.

	# grub-0.95 added -fno-stack-protector detection, to disable ssp for stage2,
	# but the objcopy's (faulty) test fails if -fstack-protector is default.
	# create a cache telling configure that objcopy is ok, and add -C to econf
	# to make use of the cache.
	#
	# CFLAGS has to be undefined running econf, else -fno-stack-protector detection fails.
	# STAGE2_CFLAGS is not allowed to be used on emake command-line, it overwrites
	# -fno-stack-protector detected by configure, removed from netboot's emake.
	use custom-cflags || unset CFLAGS

	export grub_cv_prog_objcopy_absolute=yes #79734
	use static && append-ldflags -static

	# Per bug 216625, the emul packages do not provide .a libs for performing
	# suitable static linking
	if use amd64 && use static ; then
		if [ -z "${GRUB_STATIC_PACKAGE_BUILDING}" ]; then
			die "You must use the grub-static package if you want a static Grub on amd64!"
		else
			eerror "You have set GRUB_STATIC_PACKAGE_BUILDING. This"
			eerror "is specifically intended for building the tarballs for the"
			eerror "grub-static package via USE='static -ncurses'."
			eerror "All bets are now off."
			ebeep 10
		fi
	fi

	# build the net-bootable grub first, but only if "netboot" is set
	if use netboot ; then
		econf \
		--libdir=/lib \
		--datadir=/usr/lib/grub \
		--exec-prefix=/ \
		--disable-auto-linux-mem-opt \
		--enable-diskless \
		--enable-{3c{5{03,07,09,29,95},90x},cs89x0,davicom,depca,eepro{,100}} \
		--enable-{epic100,exos205,ni5210,lance,ne2100,ni{50,65}10,natsemi} \
		--enable-{ne,ns8390,wd,otulip,rtl8139,sis900,sk-g16,smc9000,tiara} \
		--enable-{tulip,via-rhine,w89c840} || die "netboot econf failed"

		emake w89c840_o_CFLAGS="-O" || die "making netboot stuff"

		mv -f stage2/{nbgrub,pxegrub} "${S}"/
		mv -f stage2/stage2 stage2/stage2.netboot

		make clean || die "make clean failed"
	fi

	# Now build the regular grub
	# Note that FFS and UFS2 support are broken for now - stage1_5 files too big
	econf \
		--libdir=/lib \
		--datadir=/usr/lib/grub \
		--exec-prefix=/ \
		--disable-auto-linux-mem-opt \
		$(use_with ncurses curses) \
		|| die "econf failed"

	# sanity check due to common failure
	use ncurses && ! grep -qs "HAVE_LIBCURSES.*1" config.h && die "USE=ncurses but curses not found"

	emake || die "making regular stuff"
}

src_test() {
	# non-default block size also give false pass/fails.
	unset BLOCK_SIZE
	make check || die "make check failed"
}

src_install() {
	emake DESTDIR="${D}" install || die
	if use netboot ; then
		exeinto /usr/lib/grub/${CHOST}
		doexe nbgrub pxegrub stage2/stage2.netboot || die "netboot install"
	fi

	dodoc AUTHORS BUGS ChangeLog NEWS README THANKS TODO
	newdoc docs/menu.lst grub.conf.sample
	dodoc "${FILESDIR}"/grub.conf.gentoo
	prepalldocs

	[ -n "${GRUB_STATIC_PACKAGE_BUILDING}" ] && \
		mv \
		"${D}"/usr/share/doc/${PF} \
		"${D}"/usr/share/doc/grub-static-${PF/grub-}

	insinto /usr/share/grub
	doins "${FILESDIR}"/splash.xpm.gz

}

setup_boot_dir() {
	local boot_dir=$1
	local dir=${boot_dir}

	mkdir -p "${dir}"
	[[ ! -L ${dir}/boot ]] && ln -s . "${dir}/boot"
	dir="${dir}/grub"
	if [[ ! -e ${dir} ]] ; then
		mkdir "${dir}" || die "${dir} does not exist!"
	fi

	# change menu.lst to grub.conf
	if [[ ! -e ${dir}/grub.conf ]] && [[ -e ${dir}/menu.lst ]] ; then
		mv -f "${dir}"/menu.lst "${dir}"/grub.conf
		ewarn
		ewarn "*** IMPORTANT NOTE: menu.lst has been renamed to grub.conf"
		ewarn
	fi

	if [[ ! -e ${dir}/menu.lst ]]; then
		einfo "Linking from new grub.conf name to menu.lst"
		ln -snf grub.conf "${dir}"/menu.lst
	fi

	if [[ ! -e ${dir}/grub.conf ]] ; then
		s="${ROOT}/usr/share/doc/${PF}/grub.conf.gentoo"
		[[ -e "${s}" ]] && cat "${s}" >${dir}/grub.conf
		[[ -e "${s}.gz" ]] && zcat "${s}.gz" >${dir}/grub.conf
		[[ -e "${s}.bz2" ]] && bzcat "${s}.bz2" >${dir}/grub.conf
	fi

	splash_xpm_gz="${ROOT}/usr/share/grub/splash.xpm.gz"
	boot_splash_xpm_gz="${dir}/splash.xpm.gz"
	[[ -e "${splash_xpm_gz}" ]] && [[ ! -e "${boot_splash_xpm_gz}" ]] && \
		cp "${splash_xpm_gz}" "${boot_splash_xpm_gz}"

	einfo "Grub has been installed to ${boot_dir} successfully."
}

pkg_postinst() {
	if [[ -n ${DONT_MOUNT_BOOT} ]]; then
		elog "WARNING: you have DONT_MOUNT_BOOT in effect, so you must apply"
		elog "the following instructions for your /boot!"
		elog "Neglecting to do so may cause your system to fail to boot!"
		elog
	else
		setup_boot_dir "${ROOT}"/boot
		# Trailing output because if this is run from pkg_postinst, it gets mixed into
		# the other output.
		einfo ""
	fi
	elog "To interactively install grub files to another device such as a USB"
	elog "stick, just run the following and specify the directory as prompted:"
	elog "   emerge --config =${PF}"
	elog "Alternately, you can export GRUB_ALT_INSTALLDIR=/path/to/use to tell"
	elog "grub where to install in a non-interactive way."

}

pkg_config() {
	local dir
	if [ ! -d "${GRUB_ALT_INSTALLDIR}" ]; then
		einfo "Enter the directory where you want to setup grub:"
		read dir
	else
		dir="${GRUB_ALT_INSTALLDIR}"
	fi
	setup_boot_dir "${dir}"
}