refactor for preparation of flake based systems

modules_old/validations.nix

@@ -0,0 +1,30 @@
+{ lib, config, ... }:
+{
+  config.assertions = [
+    {
+      assertion =
+        lib.length (
+          lib.filter (x: x) [
+            config.mods.de_cosmic.enable
+            config.mods.de_gnome_xorg.enable
+            config.mods.de_gnome_wayland.enable
+          ]
+        ) <= 1;
+      message = ''
+        Configuration Error: Multiple desktop environments are enabled.
+        Please enable only one of the following:
+          - mods.de_cosmic.enable
+          - mods.de_gnome_xorg.enable
+          - mods.de_gnome_wayland.enable
+      '';
+    }
+    {
+      # // TODO check sinc epoulse is no longer
+      assertion = !(config.mods.de_cosmic.enable && config.mods.audio.enable);
+      message = ''
+        Configuration Error: cannot use audio with cosmic. Check if this is true anymore...
+        Remove: mods.audio.enable
+      '';
+    }
+  ];
+}