Initial commit

flake/den/templates/examples/modules/_example/ci/custom-nixos-module.nix

@@ -0,0 +1,35 @@
+{ lib, ... }:
+let
+  # A custom `nixos` class module that defines an option `names`.
+  # Used to test that we are not duplicating values from owned configs.
+  nixosNames = names: { options.${names} = lib.mkOption { type = lib.types.listOf lib.types.str; }; };
+in
+{
+  den.default.nixos.imports = [ (nixosNames "people") ];
+  den.default.includes = [
+    (
+      { user, ... }:
+      {
+        nixos.people = [ user.name ];
+      }
+    )
+  ];
+
+  den.aspects.rockhopper.includes = [
+    # Example: importing a third-party nixos module.
+    { nixos.imports = [ (nixosNames "names") ]; }
+  ];
+
+  den.aspects.rockhopper.nixos.names = [ "tux" ];
+
+  perSystem =
+    { checkCond, rockhopper, ... }:
+    {
+      checks.rockhopper-default-people = checkCond "set from den.default for each user" (
+        rockhopper.config.people == [ "alice" ]
+      );
+      checks.rockhopper-names-single-entry = checkCond "custom nixos array option set once" (
+        rockhopper.config.names == [ "tux" ]
+      );
+    };
+}