grub-nomagic-scripts

grub-bios-install.sh (1669B)

#!/bin/sh
# grub-install replacement for BIOS systems, assumes an encrypted /boot
# Copyright ⓒ 2024 Haelwenn (lanodan) Monnier <contact+grub-nomagic-scripts@hacktivis.me>
# SPDX-License-Identifier: MIT
die() {
	echo "$@"
	exit 1
}
load_cfg() {
	if [ -e "$1" ] ; then
		. "$1"
	else
		die "grub-bios-install: Error, couldn't load configuration, file not found: $1"
	fi
}
command -v lsblk || die 'grub-bios-install: Error, command not found: lsblk'
load_cfg ~/.config/grub-nomagic/env
rsync -rav --exclude '*.module' /usr/lib/grub/i386-pc /boot/grub/ || die "grub-bios-install: Failed to copy grub modules from current installation"
test -z "${DISK}" && die '$DISK needs to be set to a disk blockdevice, for example: /dev/sda'
test -z "${ROOT_BLOCK}" && die '$ROOT_BLOCK needs to be set to your root filesystem blockdevice, for example: /dev/sda2'
test -z "${GRUB_ROOT}" && die '$GRUB_ROOT needs to be set to the boottime grub root relative to the boot disk, for example: /ROOT/gentoo/@/boot'
test -z "${GRUB_CORE_MODULES}" && die '$GRUB_CORE_MODULES needs to be set to the grub modules required to decrypt /boot'
set -x -e
: ${ROOT_UUID:=$(lsblk -n -o uuid ${ROOT_BLOCK} | head -1)}
: ${GRUB_PREFIX:=(cryptouuid/${ROOT_UUID//-/}${GRUB_ROOT}/grub/}
echo "cryptomount -u ${ROOT_UUID//-/}" > /boot/grub/i386-pc/load.cfg
#echo 'cryptomount hd0,msdos2' > /boot/grub/i386-pc/load.cfg
grub-mkimage \
	--format 'i386-pc' \
	--output '/boot/grub/i386-pc/core.img' \
	--config '/boot/grub/i386-pc/load.cfg' \
	--prefix "${GRUB_PREFIX}" \
	${GRUB_CORE_MODULES}
grub-bios-setup \
	--directory='/boot/grub/i386-pc' \
	--device-map='/boot/grub/device.map' \
	"${DISK}"