modules/nixfiles: add modules for system hydra sync

modules/default.nix

@@ -13,6 +13,7 @@
     ./monitoring
     ./nginx-port-forward
     ./nixfiles
+    ./nixfiles/system-auto-sync-to-hydra.nix
     ./update-from-hydra
     ./wg-clerie
     ./wireguard-initrd

modules/nixfiles/system-auto-sync-to-hydra.nix

@@ -0,0 +1,29 @@
+{ pkgs, lib, config, ... }:
+
+with lib;
+
+let
+  cfg = config.clerie.nixfiles.system-auto-sync-to-hydra;
+in
+
+{
+  options = {
+    clerie.nixfiles.system-auto-sync-to-hydra = {
+      enable = mkEnableOption "clerie nixfiles tools";
+      allowReboot = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Monitor NixOS";
+      };
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.nixfiles-system-auto-sync-to-hydra = {
+      serviceConfig = {
+        Type = "oneshot";
+        ExecStart = pkgs.nixfiles-system-sync-to-hydra + "/bin/nixfiles-system-sync-to-hydra${optionalString cfg.allowReboot " --allow-reboot"}";
+      };
+      startAt = "*-*-* 06:47:00";
+    };
+  };
+}