#!/bin/bash

set -euo pipefail

exec 9>/var/lock/hetznerSync.lock

if ! flock -n 9
then
    echo "[$(date --rfc-3339=seconds)] offsite: another sync is still running, skipping this run"
    exit 0
fi

source /opt/backup/metrics.sh

metric_init offsite
trap metric_guard EXIT

if ! mountpoint -q {{ hetzner_raid_mount }}
then
    log "{{ hetzner_raid_mount }} not mounted, refusing to sync"
    exit 1
fi

sync_path() {
    local src=$1
    local dest=$2

    if [ -z "$(ls -A ${src} 2>/dev/null)" ]
    then
        log "${src} empty, refusing to sync"
        exit 1
    fi

    log "syncing ${src} to ${dest}"
    sudo -u {{ user }} rsync -a --delete --partial \
        -e "ssh -p {{ hetzner_port }} -i {{ user_home }}/.ssh/id_ed25519 -o UserKnownHostsFile={{ user_home }}/.ssh/known_hosts -o StrictHostKeyChecking=yes" \
        ${src}/ \
        {{ hetzner_user }}@{{ hetzner_host }}:${dest}/
}

{% for path in hetzner_paths %}
sync_path {{ path.src }} {{ path.dest }}
{% endfor %}