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#!/usr/bin/env sh

#   generate GRUB ELF files (coreboot payload) and configuration files
#
#	Copyright (C) 2014,2015,2020,2021,2023 Leah Rowe <info@minifree.org>
#
#	This program is free software: you can redistribute it and/or modify
#	it under the terms of the GNU General Public License as published by
#	the Free Software Foundation, either version 3 of the License, or
#	(at your option) any later version.
#
#	This program is distributed in the hope that it will be useful,
#	but WITHOUT ANY WARRANTY; without even the implied warranty of
#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#	GNU General Public License for more details.
#
#	You should have received a copy of the GNU General Public License
#	along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

[ "x${DEBUG+set}" = 'xset' ] && set -v
set -u -e

. "include/err.sh"

grubcfgsdir="config/grub"

. "${grubcfgsdir}/modules.list"

main()
{
	printf "Creating GRUB payloads and configuration files\n"

	handle_dependencies

	for keylayoutfile in "${grubcfgsdir}/keymap/"*.gkb; do
		[ -f "${keylayoutfile}" ] || continue
		keymap="${keylayoutfile##${grubcfgsdir}/keymap/}"
		keymap="${keymap%.gkb}"
		printf "keymap %s\n" "${keymap}" > \
		    "elf/grub/keymap_${keymap}.cfg" || \
		    err "make_keymapcfgs: cannot create elf/grub/keymap_${keymap}.cfg"
	done

	grub/grub-mkstandalone \
	    --grub-mkimage="grub/grub-mkimage" \
	    -O i386-coreboot \
	    -o "elf/grub/grub.elf" \
	    -d grub/grub-core/ \
	    --fonts= --themes= --locales=  \
	    --modules="${grub_modules}" \
	    --install-modules="${grub_install_modules}" \
	    "/boot/grub/layouts/colemak.gkb=${grubcfgsdir}/keymap/colemak.gkb" \
	    "/boot/grub/layouts/deqwertz.gkb=${grubcfgsdir}/keymap/deqwertz.gkb" \
	    "/boot/grub/layouts/esqwerty.gkb=${grubcfgsdir}/keymap/esqwerty.gkb" \
	    "/boot/grub/layouts/frazerty.gkb=${grubcfgsdir}/keymap/frazerty.gkb" \
	    "/boot/grub/layouts/frdvbepo.gkb=${grubcfgsdir}/keymap/frdvbepo.gkb" \
	    "/boot/grub/layouts/itqwerty.gkb=${grubcfgsdir}/keymap/itqwerty.gkb" \
	    "/boot/grub/layouts/svenska.gkb=${grubcfgsdir}/keymap/svenska.gkb" \
	    "/boot/grub/layouts/trqwerty.gkb=${grubcfgsdir}/keymap/trqwerty.gkb" \
	    "/boot/grub/layouts/ukdvorak.gkb=${grubcfgsdir}/keymap/ukdvorak.gkb" \
	    "/boot/grub/layouts/ukqwerty.gkb=${grubcfgsdir}/keymap/ukqwerty.gkb" \
	    "/boot/grub/layouts/usdvorak.gkb=${grubcfgsdir}/keymap/usdvorak.gkb" \
	    "/boot/grub/layouts/usqwerty.gkb=${grubcfgsdir}/keymap/usqwerty.gkb" \
	    "/boot/grub/grub.cfg=${grubcfgsdir}/config/grub_memdisk.cfg" \
	    "/boot/grub/grub_default.cfg=${grubcfgsdir}/config/grub.cfg" \
	    err "build_grub_elf: cannot build grub payload (grub-mkstandalone)"

	printf "\nDone! Check elf/grub/\n\n"
}

handle_dependencies()
{
	[ -d "grub/" ] || \
		./update project repo grub || \
		    err "handle_dependencies: cannot fetch grub"
	[ -f "grub/grub-mkstandalone" ] || \
		./build grub utils || \
		    err "handle_dependencies: cannot build grub utils"
	[ -d "elf/grub" ] || \
		mkdir -p elf/grub || \
		    err "handle_dependencies: cannot mkdir elf/grub"
	rm -f elf/grub/* || \
	    err "handle_dependencies: cannot rm inside: elf/grub/"
}

main $@