[Unit]
Description=Restore from backup for container volume %I
ConditionFileNotEmpty=%S/backups/coreos-home-server/%i/%i-latest.tar.gz

[Service]
Type=oneshot
ExecStart=/bin/podman run --replace --pull never --rm --name %p-%i --volume %i:/data:z \
                          --volume %S/backups/coreos-home-server/%i:/backups:z,ro \
                          --entrypoint /bin/bash docker.io/debian:stable-slim \
                          -c 'test -n "$(ls -A /data)" && echo "Volume %i is not empty, skipping." && exit 0; \
                              tar -xvpf "/backups/%i-latest.tar.gz" -C /data'

[Install]
WantedBy=multi-user.target