umorpha-boxes/pkg/umorpha-disk/mkinitcpio-hook

#!/hint/ash
# Copyright (C) 2023  Umorpha Systems
# SPDX-License-Identifier: AGPL-3.0-or-later

# args: errmsg
umorpha_emergency_shell() {
	run_hookfunctions 'run_emergencyhook' 'emergency hook' $EMERGENCYHOOKS
	err "$*"
	echo "You are now being dropped into an emergency shell."
	launch_interactive_shell
	msg "Trying to continue (this will most likely fail) ..."
}

# args: /path/to/newroot
umorpha_mount_handler() {
	local newroot="$1"

	msg ":: mounting '$root'+'$overlay' on real root"
	if ! umorpha-mount \
		--root="$root:$rootfstype:ro${rootflags:+,$rootflags}" \
		--overlay="$overlay:$overlayfstype:${rwopt:-ro}${overlayflags:+,$overlayrootflags}" \
		${boot:+--boot="$boot:$bootfstype:${rwopt:-ro}${bootflags:+,$bootflags}"} \
		--basedir=/run/umorpha-root \
		--final-mountpoint="$newroot"
	then
		umorpha_emergency_shell "Failed to mount base filesystem"
	fi
}

run_hook() {
	export mount_handler='umorpha_mount_handler'
}