chore(hooks): enforce enable option on all home modules

home/modules/default.nix

@@ -5,6 +5,25 @@
   ...
 }:
 
+let
+  moduleDirs = lib.filterAttrs (_: v: v == "directory") (builtins.readDir ./.);
+  dirHasEnableOption =
+    name:
+    let
+      nixFiles = lib.filterAttrs (n: v: v == "regular" && lib.hasSuffix ".nix" n) (
+        builtins.readDir ./${name}
+      );
+    in
+    !(builtins.pathExists ./${name}/default.nix)
+    || lib.any (f: lib.hasInfix "mkEnableOption" (builtins.readFile ./${name}/${f})) (
+      builtins.attrNames nixFiles
+    );
+  withoutEnableOption = builtins.attrNames (
+    lib.filterAttrs (name: _: !dirHasEnableOption name) moduleDirs
+  );
+in
+lib.throwIf (withoutEnableOption != [ ])
+  "home modules missing enable option: ${lib.concatStringsSep ", " withoutEnableOption}"
   {
     options = {
       host.username = lib.mkOption {