#!/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

. "include/err.sh"

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

. "${grubcfgsdir}/modules.list"

main()
{
	handle_dependencies
	build_keymap_configs
	build_grub_payload
	printf "GRUB files now available under directory: %s\n" "${elfdir}"
}

handle_dependencies()
{
	[ -d "src/grub" ] || x_ ./update trees -f grub
	[ -f "src/grub/grub-mkstandalone" ] || build_grub_utils
	x_ mkdir -p "${elfdir}"
	x_ rm -f "${elfdir}/"*
}

build_grub_utils()
{
	(
	x_ cd "src/grub"
	[ ! -d Makefile ] || x_ make distclean
	x_ ./bootstrap --gnulib-srcdir=gnulib/ --no-git
	x_ ./autogen.sh
	x_ ./configure --with-platform=coreboot
	x_ make -j$(nproc) FS_PAYLOAD_MODULES=""
	)
}

build_keymap_configs()
{
	for keylayoutfile in "${grubcfgsdir}/keymap/"*.gkb; do
		[ -f "${keylayoutfile}" ] || continue
		keymap="${keylayoutfile##${grubcfgsdir}/keymap/}"
		keymap="${keymap%.gkb}"
		x_ printf "keymap %s\n" "${keymap}" > \
		    "${elfdir}/keymap_${keymap}.cfg"
	done
}

build_grub_payload()
{
	./src/grub/grub-mkstandalone \
	    --grub-mkimage="src/grub/grub-mkimage" \
	    -O i386-coreboot \
	    -o "${elfdir}/grub.elf" \
	    -d "src/grub/grub-core/" \
	    --fonts= --themes= --locales=  \
	    --modules="${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 $@