nixos/godns: init module

Initial implementation of the GoDNS service module. This module allows users to enable and configure the GoDNS service on their NixOS system. It includes options for specifying the GoDNS package and the path to the configuration file.

nixos/modules/module-list.nix

@@ -1053,6 +1053,7 @@
   ./services/networking/go-neb.nix
   ./services/networking/go-shadowsocks2.nix
   ./services/networking/gobgpd.nix
+  ./services/networking/godns.nix
   ./services/networking/gvpe.nix
   ./services/networking/hans.nix
   ./services/networking/harmonia.nix

nixos/modules/services/networking/godns.nix

@@ -0,0 +1,55 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.services.godns;
+
+  inherit (lib)
+    mkEnableOption
+    mkIf
+    mkOption
+    mkPackageOption
+    types
+    ;
+in
+{
+
+  options.services.godns = {
+    enable = mkEnableOption "GoDNS Service";
+
+    package = mkPackageOption pkgs "godns" { };
+
+    configPath = mkOption {
+      type = types.path;
+      description = "Path to the configuration file for godns.";
+      example = "/etc/godns/config.json";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.godns = {
+      description = "GoDNS Service";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+      serviceConfig = {
+        ExecStart = "${lib.getExe cfg.package} -c ${cfg.configPath}";
+        Restart = "always";
+        KillMode = "process";
+        RestartSec = "2s";
+      };
+    };
+  };
+
+  meta = {
+    maintainers = [ lib.maintainers.michaelvanstraten ];
+    doc = ''
+      The GoDNS service module allows users to enable and configure the GoDNS service on their NixOS system.
+
+      For more information, visit the [GoDNS GitHub repository](https://github.com/TimothyYe/godns).
+    '';
+  };
+
+}