home/{hyprland,waybar}: init

modules/machineVars.nix

@@ -7,6 +7,8 @@ in {
   options.machineVars = {
     headless = mkEnableOption "Whether or not the machine should have graphical output.";
 
+    wayland = mkEnableOption "Whether or not the machine should use Wayland as the display server.";
+
     screens = mkOption {
       type = types.attrsOf (types.submodule ( { name, ...}: {
         options = {
@@ -114,6 +116,10 @@ t tools preinstalled.";
         assertion = cfg.battery != null -> cfg.laptop;
         message = "A battery shouldn't exist on a non laptop machine";
       }
+      {
+        assertion = cfg.wayland -> !cfg.headless;
+        message = "A machine can't be headless and use Wayland at the same time.";
+      }
       # FIXME:
       # {
       #   assertion = map () (cfg.screens)