added enables to modules and made base module that imports all other modules

enviroments/common/default.nix

@@ -1,4 +1,4 @@
-{pkgs, ...}: {
+{...}: {
   imports = [];
 
   nix = {

hosts/defiant/configuration.nix

@@ -8,10 +8,7 @@
     inputs.disko.nixosModules.disko
     ../../enviroments/server
 
-    ../../modules/hardware.nix
+    ../../modules
-    ../../modules/users.nix
-    ../../modules/desktop.nix
-    ../../modules/nix-development.nix
   ];
 
   nixpkgs.config.allowUnfree = true;

hosts/horizon/configuration.nix

@@ -3,10 +3,7 @@
     inputs.nixos-hardware.nixosModules.framework-11th-gen-intel
 
     ../../enviroments/client
-    ../../modules/hardware.nix
+    ../../modules
-    ../../modules/users.nix
-    ../../modules/desktop.nix
-    ../../modules/nix-development.nix
   ];
 
   nixpkgs.config.allowUnfree = true;

hosts/twilight/configuration.nix

@@ -2,10 +2,7 @@
   imports = [
     ../../enviroments/client
 
-    ../../modules/hardware.nix
+    ../../modules
-    ../../modules/users.nix
-    ../../modules/desktop.nix
-    ../../modules/nix-development.nix
   ];
 
   nixpkgs.config.allowUnfree = true;

modules/default.nix

@@ -0,0 +1,8 @@
+{...}: {
+  imports = [
+    ./hardware.nix
+    ./users.nix
+    ./desktop.nix
+    ./nix-development.nix
+  ];
+}

modules/desktop.nix

@@ -1,4 +1,16 @@
-{pkgs, ...}: {
+{
+  lib,
+  pkgs,
+  config,
+  ...
+}: {
+  options.host.desktop.enable = lib.mkEnableOption "should desktop configuration be enabled";
+
+  config = lib.mkMerge [
+    {
+      host.desktop.enable = lib.mkDefault true;
+    }
+    (lib.mkIf config.host.desktop.enable {
       services = {
         # Enable CUPS to print documents.
         printing.enable = true;
@@ -38,4 +50,6 @@
 
       # enable RealtimeKit for pulse audio
       security.rtkit.enable = true;
+    })
+  ];
 }

modules/nix-development.nix

@@ -1,8 +1,17 @@
 {
-  inputs,
+  lib,
+  config,
   pkgs,
+  inputs,
   ...
 }: {
+  options.host.nix-development.enable = lib.mkEnableOption "should desktop configuration be enabled";
+
+  config = lib.mkMerge [
+    {
+      host.nix-development.enable = lib.mkDefault true;
+    }
+    (lib.mkIf config.host.nix-development.enable {
       nix = {
         nixPath = ["nixpkgs=${inputs.nixpkgs}"];
       };
@@ -11,4 +20,6 @@
         # nix langauge server
         nixd
       ];
+    })
+  ];
 }