wip laziness

Author: eljamm

maintainers/types/example.nix

@@ -78,7 +78,7 @@ in
     };
     tests = mkOption {
       description = "at least one test for the example";
-      type = with types; attrsOf test;
+      type = with types; lazyAttrsOf test;
       default = { };
     };
     links = mkOption {

maintainers/types/module.nix

@@ -125,7 +125,7 @@ in
       '';
     };
     examples = mkOption {
-      type = with types; attrsOf example;
+      type = with types; lazyAttrsOf example;
       description = ''
         Configurations that illustrate how to set up the ${type}.
 

maintainers/types/project.nix

@@ -132,7 +132,7 @@ in
               we can still reduce granularity and move all examples to the application level.
             */
             examples = mkOption {
-              type = attrsOf example;
+              type = lazyAttrsOf example;
               description = "A configuration of an existing application module that illustrates how to use it";
               default = { };
             };
@@ -141,7 +141,7 @@ in
             #       Without this field, many applications will appear entirely untested although there's actually *some* assurance that *something* works.
             #       Eventually we want to move to documentable tests exclusively, and then remove this field, but this may take a very long time.
             tests = mkOption {
-              type = attrsOf test;
+              type = lazyAttrsOf test;
               default = { };
               description = "NixOS test that ensures project components behave as intended";
             };

maintainers/types/test.nix

@@ -100,7 +100,7 @@ let
     else if test ? meta.broken && test.meta.broken then
       null
     else
-      pkgs.testers.runNixOSTest args;
+      lib.lazyDerivation { derivation = pkgs.testers.runNixOSTest args; };
 
   callTest =
     module:
@@ -128,7 +128,9 @@ in
       # This is because test nodes are eagerly evaluated to create the
       # driver's `vmStartScripts` (see `nixos/lib/testing/driver.nix` in
       # NixOS).
-      type = with types; nullOr (coercedTo (either deferredModule package) callTest (nullOr package));
+      type =
+        with types;
+        nullOr (coercedTo (either deferredModule package) callTest (nullOr deferredModule));
       default = null;
       description = "NixOS test module";
     };