synit: add NNCP services

nixos/modules/synit/services/default.nix

@@ -1,5 +1,5 @@
 {
-  imports = [ ./ntpd.nix ./sshd.nix ./userSettings.nix ./wifi.nix ];
+  imports = [ ./nncp.nix ./ntpd.nix ./sshd.nix ./userSettings.nix ./wifi.nix ];
   environment.etc."syndicate/services/configdirs.pr".text = ''
     <require-service <config-watcher "/run/etc/syndicate/services" $.>>
   '';

nixos/modules/synit/services/nncp.nix

@@ -0,0 +1,58 @@
+{ config, lib, pkgs, ... }:
+
+let
+  lib' = lib.extend (import ../../../lib.nix);
+  toPreserves = lib'.generators.toPreserves { };
+  cfg = config.services.nncp;
+  pkg = config.programs.nncp.package;
+in {
+  options = {
+
+    services.nncp = {
+      caller = {
+        enable = lib.mkEnableOption ''
+          croned NNCP TCP daemon caller.
+          The daemon will take configuration from
+          <xref linkend="opt-programs.nncp.settings"/>
+        '';
+        extraArgs = lib.mkOption {
+          type = with lib.types; listOf str;
+          description = "Extra command-line arguments to pass to caller.";
+          default = [ ];
+          example = [ "-autotoss" ];
+        };
+      };
+
+      daemon = {
+        enable = lib.mkEnableOption ''
+          NNCP TCP synronization daemon.
+          The daemon will take configuration from
+          <xref linkend="opt-programs.nncp.settings"/>
+        '';
+        extraArgs = lib.mkOption {
+          type = with lib.types; listOf str;
+          description = "Extra command-line arguments to pass to daemon.";
+          default = [ ];
+          example = [ "-autotoss" ];
+        };
+      };
+
+    };
+  };
+
+  config = (lib.mkIf cfg.daemon.enable {
+    environment.etc."syndicate/services/nncp-daemon.pr".text =
+      let exec = [ "${pkg}/bin/nncp-daemon" ] ++ cfg.daemon.extraArgs;
+      in ''
+        <require-service <daemon nncp-daemon>>
+        <daemon nncp-daemon ${toPreserves exec}>
+      '';
+  }) // (lib.mkIf cfg.caller.enable {
+    environment.etc."syndicate/services/nncp-caller.pr".text =
+      let exec = [ "${pkg}/bin/nncp-caller" ] ++ cfg.caller.extraArgs;
+      in ''
+        <require-service <daemon nncp-caller>>
+        <daemon nncp-caller ${toPreserves exec}>
+      '';
+  });
+}