more progress on custom options config

modules/capabilities/graphics.nix

@@ -1,15 +1,51 @@
 { inputs, self, ... }: {
-  flake.nixosModules.graphics = { config, pkgs, ... }: {
-    environment.systemPackages = with pkgs; [
-      wayland-utils
-      mesa-demos
-      vulkan-tools
-    ];
+  flake.nixosModules.graphics = { config, pkgs, lib, ... }: {
+    options = {
+      components = {
+        displayManager = lib.mkOption {
+          # enum that dynamically populates itself with the contents of the display-managers directory
+          type = lib.types.enum (map (name: lib.removeSuffix ".nix" name) (
+            builtins.attrNames (builtins.readDir "${self}/modules/components/display-managers")
+          ));
+          default = "lightdm";
+        };
 
-    fonts.packages = with pkgs; [
-      iosevka-comfy.comfy
-      nerd-fonts.jetbrains-mono
-    ];
+        windowManagers = lib.mkOption {
+          type = lib.types.either (lib.types.listOf (
+            lib.types.enum (map (name: lib.removeSuffix ".nix" name) (
+              builtins.attrNames (builtins.readDir "${self}/modules/components/window-managers")
+            ))
+          )) (lib.types.enum (map (name: lib.removeSuffix ".nix" name) (
+            builtins.attrNames (builtins.readDir "${self}/modules/components/window-managers")
+          )));
+          default = [];
+        };
+
+        shells = lib.mkOption {
+          type = lib.types.either (lib.types.listOf (
+            lib.types.enum (map (name: lib.removeSuffix ".nix" name) (
+              builtins.attrNames (builtins.readDir "${self}/modules/components/shells")
+            ))
+          )) (lib.types.enum (map (name: lib.removeSuffix ".nix" name) (
+              builtins.attrNames (builtins.readDir "${self}/modules/components/shells")
+          )));
+          default = [];
+        };
+      };
+    };
+
+    config = {
+      environment.systemPackages = with pkgs; [
+        wayland-utils
+        mesa-demos
+        vulkan-tools
+      ];
+
+      fonts.packages = with pkgs; [
+        iosevka-comfy.comfy
+        nerd-fonts.jetbrains-mono
+      ];
+    };
   };
 
   flake.homeModules.graphics = { config, pkgs, ... }: {
@@ -19,5 +55,15 @@
       gparted
       vlc
     ];
+
+    dconf.settings = {
+      "org/gnome/desktop/interface" = {
+        color-scheme = "prefer-dark";
+      };
+    };
+
+    gtk = {
+      enable = true;
+    };
   };
 }