#!/bin/bash
tempDir=/tmp/backup
mountRemote() {
	rclone mount schulev: "$tempDir" --daemon
}
umountRemote() {
	umount "$tempDir"
}
case $1 in
	restore)
		mountRemote
		find "$tempDir" -type f | xargs -n 1 tar -xf
		umountRemote
		;;
	backup)
		mountRemote
		declare -A hashes
		while IFS= read -r file; do 
			hash="$(echo -n "$file" | openssl dgst -binary -sha256 | openssl base64 | sed -e 's/\//@/g')"
			hashes[s]=0
			file_hash="$tempDir/$hash"
			hashes[$hash]=0
			if [[ ! -f "$file_hash" || $(tar -df "$file_hash") ]]; then
				tar -cf "$file_hash" "$file"
			fi
		done < <(find -type f,l; find -type d -empty)
		cd "$tempDir"
		for file in *; do
			if [ ! -v hashes[$file] ]; then
				rm "$file"
			fi
		done
		umountRemote
		;;
	*)
		echo "use backup or restore as argument"
		;;
	esac