nixos/zfs-replication: add package option (#368310)

}:

let

  cfg = config.services.zfs.autoReplication;

  recursive = lib.optionalString cfg.recursive " --recursive";

  followDelete = lib.optionalString cfg.followDelete " --follow-delete";

in

{

  options = {

    services.zfs.autoReplication = {

      enable = lib.mkEnableOption "ZFS snapshot replication";

      package = lib.mkPackageOption pkgs "zfs-replicate" { };

      followDelete = lib.mkOption {

        description = "Remove remote snapshots that don't have a local correspondent.";

        default = true;

        "https://github.com/alunduil/zfs-replicate"

      ];

      restartIfChanged = false;

      serviceConfig.ExecStart = "${pkgs.zfs-replicate}/bin/zfs-replicate${recursive} -l ${lib.escapeShellArg cfg.username} -i ${lib.escapeShellArg cfg.identityFilePath}${followDelete} ${lib.escapeShellArg cfg.host} ${lib.escapeShellArg cfg.remoteFilesystem} ${lib.escapeShellArg cfg.localFilesystem}";

      serviceConfig.ExecStart =

        let

          args = lib.map lib.escapeShellArg (

            [

              "-l"

              cfg.username

              "-i"

              cfg.identityFilePath

              cfg.host

              cfg.remoteFilesystem

              cfg.localFilesystem

            ]

            ++ (lib.optional cfg.recursive "--recursive")

            ++ (lib.optional cfg.followDelete "--follow-delete")

          );

        in

        "${lib.getExe cfg.package} ${lib.concatStringSep " " args}";

      wantedBy = [

        "zfs-snapshot-daily.service"

        "zfs-snapshot-frequent.service"