#!/bin/sh
set -eu

backup_includes=/etc/restic/includes
backup_excludes=/etc/restic/excludes
backup_tag=foobar
backup_keep=1m

main() {
	# remove stale locks
	resticw unlock

	# run backup
	resticw backup \
		--one-file-system \
		--files-from "${backup_includes}" \
		--exclude-file "${backup_excludes}" \
		--tag "${backup_tag}"

	# prune backups older than $backup_keep duration
	resticw forget \
		--keep-within "${backup_keep}" \
		--prune \
		--group-by "paths,tags" \
		--tag "${backup_tag}"

	# TODO: restic check
	# TODO: dump stats to file in metrics format to /run/prom/restic
}

exit_hook() {
	resticw unlock
}
trap exit_hook INT EXIT

main