mkosi-initrd-posttrans

#!/bin/sh

: "${MKOSI_INITRD:=/usr/bin/mkosi-initrd}"

if [ ! -x "$MKOSI_INITRD" ]; then
	echo "${0##*/}: mkosi-initrd is not installed, not rebuilding the initrd." >&2
	exit 0
fi

# FIXME: mkosi-initrd fails to cp files directly to /boot
MKOSI_INITRD_STAGING_DIR="$(mktemp -p /var/tmp/ -d -t mkosi-initrd-stagingXXXXXXXX)"
if [ ! -d "$MKOSI_INITRD_STAGING_DIR" ]; then
	echo "${0##*/}: failed to create mkosi-initrd staging directory." >&2
	exit 1
fi

initrd_warn_chroot_build() {
	# FIXME: mkosi-initrd does not provide anything like --regenerate-all yet
	echo "Please regenerate all the initrds with \"$MKOSI_INITRD\" as soon as your system is complete." >&2
}

initrd_regenerate() {
	local kver="$1"
	local res

	"$MKOSI_INITRD" --kernel-version "$kver" -O "$MKOSI_INITRD_STAGING_DIR" -o "initrd-$kver"
	res=$?
	[ $res -ne 0 ] && return $res

	chmod 600 "$MKOSI_INITRD_STAGING_DIR/initrd-$kver"
	res=$?
	[ $res -ne 0 ] && return $res

	cp --reflink=auto "$MKOSI_INITRD_STAGING_DIR/initrd-$kver" "/boot/initrd-$kver"
	return $?
}

initrd_regenerate_all() {
	# FIXME: mkosi-initrd does not provide anything like --regenerate-all yet
	for d in /lib/modules/*; do
		[ -d "$d" ] || continue
		kver=${d##*/}
		if "$MKOSI_INITRD" --kernel-version "$kver" -O "$MKOSI_INITRD_STAGING_DIR" -o "initrd-$kver" \
			&& chmod 600 "$MKOSI_INITRD_STAGING_DIR/initrd-$kver"; then
			# The staging dir will contain: initrd-<kver> -> initrd-<kver>.cpio.zst
			cp --reflink=auto "$MKOSI_INITRD_STAGING_DIR/initrd-$kver" "/boot/initrd-$kver"
			rm -f "$MKOSI_INITRD_STAGING_DIR/initrd-$kver"*
		fi
	done
}

initrd_cleanup() {
	rm -rf "$MKOSI_INITRD_STAGING_DIR"
}