Add ngircd module

nixos/modules/misc/ids.nix

@@ -120,6 +120,7 @@
       jenkins = 109;
       systemd-journal-gateway = 110;
       notbit = 111;
+      ngircd = 112;
 
       # When adding a uid, make sure it doesn't match an existing gid.
 

nixos/modules/module-list.nix

@@ -180,6 +180,7 @@
   ./services/networking/minidlna.nix
   ./services/networking/nat.nix
   ./services/networking/networkmanager.nix
+  ./services/networking/ngircd.nix
   ./services/networking/notbit.nix
   ./services/networking/ntopng.nix
   ./services/networking/ntpd.nix

nixos/modules/services/networking/ngircd.nix

@@ -0,0 +1,58 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.ngircd;
+
+  configFile = pkgs.stdenv.mkDerivation {
+    name = "ngircd.conf";
+
+    text = cfg.config;
+
+    preferLocalBuild = true;
+
+    buildCommand = ''
+      echo -n "$text" > $out
+      ${cfg.package}/sbin/ngircd --config $out --configtest
+    '';
+  };
+in {
+  options = {
+    services.ngircd = {
+      enable = mkEnableOption "the ngircd IRC server";
+
+      config = mkOption {
+        description = "The ngircd configuration (see ngircd.conf(5)).";
+
+        type = types.lines;
+      };
+
+      package = mkOption {
+        description = "The ngircd package.";
+
+        type = types.package;
+
+        default = pkgs.ngircd;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    #!!! TODO: Use ExecReload (see https://github.com/NixOS/nixpkgs/issues/1988)
+    systemd.services.ngircd = {
+      description = "The ngircd IRC server";
+
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig.ExecStart = "${cfg.package}/sbin/ngircd --config ${configFile} --nodaemon";
+
+      serviceConfig.User = "ngircd";
+    };
+
+    users.extraUsers.ngircd = {
+      uid = config.ids.uids.ngircd;
+      description = "ngircd user.";
+    };
+  };
+}