#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-or-later
# SPDX-FileCopyrightText: 2014,2015,2020,2021,2023 Leah Rowe <leah@libreboot.org>

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

elfdir="elf/grub"
grubcfgsdir="config/grub"
layoutdir="/boot/grub/layouts"

. "include/err.sh"
. "${grubcfgsdir}/modules.list"

main()
{
	handle_dependencies
	build_keymap_configs
	build_grub_payload
}

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 "${elfdir}" ] || \
		mkdir -p "${elfdir}" || \
		    err "handle_dependencies: cannot mkdir ${elfdir}"
	rm -f "${elfdir}/"* || \
	    err "handle_dependencies: cannot rm inside: ${elfdir}/"
}

build_keymap_configs()
{
	for keylayoutfile in "${grubcfgsdir}/keymap/"*.gkb; do
		[ -f "${keylayoutfile}" ] || continue
		keymap="${keylayoutfile##${grubcfgsdir}/keymap/}"
		keymap="${keymap%.gkb}"
		printf "keymap %s\n" "${keymap}" > \
		    "${elfdir}/keymap_${keymap}.cfg" || \
		    err "mk_keymap: can't make ${elfdir}/keymap_${keymap}.cfg"
	done
}

build_grub_payload()
{
	grub/grub-mkstandalone \
	    --grub-mkimage="grub/grub-mkimage" \
	    -O i386-coreboot \
	    -o "${elfdir}/grub.elf" \
	    -d grub/grub-core/ \
	    --fonts= --themes= --locales=  \
	    --modules="${grub_modules}" \
	    --install-modules="${grub_install_modules}" \
	    "${layoutdir}/colemak.gkb=${grubcfgsdir}/keymap/colemak.gkb" \
	    "${layoutdir}/deqwertz.gkb=${grubcfgsdir}/keymap/deqwertz.gkb" \
	    "${layoutdir}/esqwerty.gkb=${grubcfgsdir}/keymap/esqwerty.gkb" \
	    "${layoutdir}/frazerty.gkb=${grubcfgsdir}/keymap/frazerty.gkb" \
	    "${layoutdir}/frdvbepo.gkb=${grubcfgsdir}/keymap/frdvbepo.gkb" \
	    "${layoutdir}/itqwerty.gkb=${grubcfgsdir}/keymap/itqwerty.gkb" \
	    "${layoutdir}/svenska.gkb=${grubcfgsdir}/keymap/svenska.gkb" \
	    "${layoutdir}/trqwerty.gkb=${grubcfgsdir}/keymap/trqwerty.gkb" \
	    "${layoutdir}/ukdvorak.gkb=${grubcfgsdir}/keymap/ukdvorak.gkb" \
	    "${layoutdir}/ukqwerty.gkb=${grubcfgsdir}/keymap/ukqwerty.gkb" \
	    "${layoutdir}/usdvorak.gkb=${grubcfgsdir}/keymap/usdvorak.gkb" \
	    "${layoutdir}/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)"
}

main $@