#!/bin/sh

set -Eeuxo pipefail

target_path="/persist"
snapshot_path="$target_path/kopia-backup-snapshot"

if [ -e "$snapshot_path" ] && btrfs subvolume delete "$snapshot_path"; then
    echo "Deleted leftover old snapshot."
fi

btrfs subvolume snapshot -r "$target_path" "$snapshot_path"

# --no-send-snapshot-path due to https://github.com/kopia/kopia/issues/4402
kopia snapshot create --no-send-snapshot-report --override-source "$target_path" "$@" -- "$snapshot_path"

btrfs subvolume delete "$snapshot_path"