refactor(waybar): simplify registry consumption

configs/nixos/modules/desktop/session/waybar.nix

@@ -6,26 +6,19 @@
 }:
 # Waybar: a top status bar reading system state at a glance.
 let
-  waybarModulesFor =
+  moduleNames =
     position:
-    map (module: module.name) (
-      lib.sort (a: b: a.order < b.order) (
-        lib.filter (module: module.position == position) registeredWaybarModules
+    map (entry: entry.name) (
+      lib.sort (left: right: left.module.order < right.module.order) (
+        lib.filter (entry: entry.module.position == position) moduleEntries
       )
     );
 
-  registeredWaybarModules = lib.mapAttrsToList (
-    name: module:
-    module
-    // {
-      inherit name;
-    }
-  ) hostWaybarModules;
-
-  hostWaybarModules = lib.attrByPath [ config.networking.hostName ] { } config.registry.waybar;
-
-  registeredWaybarModuleSettings = lib.mapAttrs (_name: module: module.settings) hostWaybarModules;
+  moduleEntries = lib.mapAttrsToList (name: module: {
+    inherit name module;
+  }) modules;
 
+  modules = lib.attrByPath [ config.networking.hostName ] { } config.registry.waybar;
 in
 {
   options.modules.desktop.session.waybar.enable = lib.mkEnableOption "the Waybar status bar";
@@ -50,11 +43,11 @@ in
           spacing = 8;
           margin-right = 8;
 
-          modules-left = waybarModulesFor "left";
-          modules-center = waybarModulesFor "center";
-          modules-right = waybarModulesFor "right";
+          modules-left = moduleNames "left";
+          modules-center = moduleNames "center";
+          modules-right = moduleNames "right";
         }
-        registeredWaybarModuleSettings
+        (lib.mapAttrs (_name: module: module.settings) modules)
       ];
     };