#!/bin/sh
# this requires the gnu tools:
# apk add coreutils tar
IFS='
'
_paths='/etc
/home
/root
/var/acme
/var/service
/var/sshkeys
/var/spool/cron'

_file_list="$(mktemp)"
ref="$(mktemp)"
trap 'rm "$list" "$ref"' EXIT INT
touch -d '-24 hours' "$ref"
trap 'rm -f "$_file_list"' EXIT INT

if [ "$1" = daily ] ; then
	find $_paths -newer "$ref" -print0  > "$_file_list"
else
	find $_paths -print0  > "$_file_list"
fi

tar --null -T "$_file_list" -cf - \
	| zstd -3c