syncthing: merge qsyncthingtray into the module

modules/misc/news.nix

@@ -539,6 +539,16 @@ in
           A new module is available: 'services.qsyncthingtray'
         '';
       }
+
+      {
+        time = "2018-01-25T11:35:08+00:00";
+        message = ''
+          'services.qsyncthingtray' has been merged into 'services.syncthing'.
+          Please, use 'services.syncthing.tray' option to activate the tray service.
+
+          The old module will be removed on February 25, 2018.
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -53,7 +53,6 @@ let
     ./services/owncloud-client.nix
     ./services/parcellite.nix
     ./services/polybar.nix
-    ./services/qsyncthingtray.nix
     ./services/random-background.nix
     ./services/redshift.nix
     ./services/screen-locker.nix

modules/services/qsyncthingtray.nix

@@ -1,29 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-with lib;
-
-{
-  options = {
-    services.qsyncthingtray = {
-      enable = mkEnableOption "QSyncthingTray";
-    };
-  };
-
-  config = mkIf config.services.qsyncthingtray.enable {
-    systemd.user.services.qsyncthingtray = {
-        Unit = {
-          Description = "QSyncthingTray";
-          After = [ "graphical-session-pre.target" ];
-          PartOf = [ "graphical-session.target" ];
-        };
-
-        Install = {
-          WantedBy = [ "graphical-session.target" ];
-        };
-
-        Service = {
-          ExecStart = "${pkgs.qsyncthingtray}/bin/QSyncthingTray";
-        };
-    };
-  };
-}

modules/services/syncthing.nix

@@ -3,16 +3,30 @@
 with lib;
 
 {
+  imports = [
+    (mkRenamedOptionModule
+      [ "services" "qsyncthingtray" "enable" ]
+      [ "services" "syncthing" "tray" ])
+  ];
+
   meta.maintainers = [ maintainers.rycee ];
 
   options = {
     services.syncthing = {
       enable = mkEnableOption "Syncthing continuous file synchronization";
+
+      tray = mkOption {
+        type = types.bool;
+        default = false;
+        description = "Whether to enable QSyncthingTray service.";
+      };
     };
   };
 
-  config = mkIf config.services.syncthing.enable {
+  config = mkIf config.services.syncthing.enable (mkMerge [
-    systemd.user.services.syncthing = {
+    {
+      systemd.user.services = {
+        syncthing = {
           Unit = {
             Description = "Syncthing - Open Source Continuous File Synchronization";
             Documentation = "man:syncthing(1)";
@@ -32,3 +46,24 @@ with lib;
         };
       };
     }
+    (mkIf config.services.syncthing.tray {
+      systemd.user.services = {
+        qsyncthingtray = {
+          Unit = {
+            Description = "QSyncthingTray";
+            After = [ "graphical-session-pre.target" ];
+            PartOf = [ "graphical-session.target" ];
+          };
+
+          Service = {
+            ExecStart = "${pkgs.qsyncthingtray}/bin/QSyncthingTray";
+          };
+
+          Install = {
+            WantedBy = [ "graphical-session.target" ];
+          };
+        };
+      };
+    })
+  ]);
+}