#!/bin/bash -e
mount_bind_rootfs() {
	if ! mount | grep -q /rootfs; then
		mkdir -p /rootfs
		mount --bind / /rootfs
	fi
}

mount_efi() {
	if ! mount | grep -q /boot/efi; then
		mount /boot/efi
	fi
}

umount_bind_rootfs() {
	if mount | grep -q /rootfs; then
		umount /rootfs || lsof -n | grep /rootfs
		rmdir /rootfs
	fi
}

umount_efi() {
	if mount | grep -q /boot/efi; then
		umount /boot/efi || lsof -n | grep /boot/efi
	fi
}

case $1 in
	before)
		echo "Start of backup: $2 to $BORG_REPO"
		case $2 in
			rootfs) apt-get clean || true; mount_bind_rootfs;;
			boot-efi) mount_efi ;;
		esac
		;;
	after)
		case $2 in
			rootfs) umount_bind_rootfs ;;
			boot-efi) umount_efi ;;
		esac
		echo "End of backup: $2 to $BORG_REPO"
		;;
esac