#!/usr/bin/env bash

set -eo pipefail

if [[ -e restoration ]]; then
	echo 'Error: an operation is already ongoing' >&2
	exit 1
fi

mkdir restoration

echo "restoring baks/epoch" >&2
sudo btrfs receive restoration -f baks/epoch

find baks -maxdepth 1 -type f | sort | head -n-1 | while read -r file; do
	echo "restoring $file" >&2
	mv restoration/{current,last}
	sudo btrfs receive restoration -f "$file"
	sudo btrfs subvol delete restoration/last
done

echo "restoration complete" >&2