nixos: add bird module

patch bird to look in /var/run for birc.ctl

nixos/modules/misc/ids.nix

@@ -217,6 +217,7 @@
       lambdabot = 191;
       asterisk = 192;
       plex = 193;
+      bird = 195;
 
       # When adding a uid, make sure it doesn't match an existing gid. And don't use uids above 399!
 
@@ -412,6 +413,7 @@
       #asterisk = 192; # unused
       plex = 193;
       sabnzbd = 194;
+      bird = 195;
 
       # When adding a gid, make sure it doesn't match an existing
       # uid. Users and groups with the same name should have equal

nixos/modules/module-list.nix

@@ -252,6 +252,7 @@
   ./services/networking/atftpd.nix
   ./services/networking/avahi-daemon.nix
   ./services/networking/bind.nix
+  ./services/networking/bird.nix
   ./services/networking/bitlbee.nix
   ./services/networking/btsync.nix
   ./services/networking/charybdis.nix

nixos/modules/services/networking/bird.nix

@@ -0,0 +1,76 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkEnableOption mkIf mkOption singleton types;
+  inherit (pkgs) bird;
+  cfg = config.services.bird;
+
+  configFile = pkgs.writeText "bird.conf" ''
+    ${cfg.config}
+  '';
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.bird = {
+
+      enable = mkEnableOption "BIRD Internet Routing Daemon";
+
+      config = mkOption {
+        type = types.string;
+        description = ''
+          BIRD Internet Routing Daemon configuration file.
+          http://bird.network.cz/?get_doc&f=bird-3.html
+        '';
+      };
+
+      user = mkOption {
+        type = types.string;
+        default = "ircd";
+        description = ''
+          BIRD Internet Routing Daemon user.
+        '';
+      };
+
+      group = mkOption {
+        type = types.string;
+        default = "ircd";
+        description = ''
+          BIRD Internet Routing Daemon group.
+        '';
+      };
+
+    };
+
+  };
+
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.extraUsers = singleton {
+      name = cfg.user;
+      description = "BIRD Internet Routing Daemon user";
+      uid = config.ids.uids.bird;
+      group = cfg.group;
+    };
+
+    users.extraGroups = singleton {
+      name = cfg.group;
+      gid = config.ids.gids.bird;
+    };
+
+    systemd.services.bird = {
+      description = "BIRD Internet Routing Daemon";
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        ExecStart   = "${bird}/bin/bird -d -c ${configFile} -s /var/run/bird.ctl -u ${cfg.user} -g ${cfg.group}";
+      };
+    };
+  };
+}