🌱 Refactor internal cache/informers map impl

pkg/cache/cache.go

@@ -170,19 +170,31 @@ func New(config *rest.Config, opts Options) (Cache, error) {
 	if err != nil {
 		return nil, err
 	}
-	transformByGVK, err := convertToByGVK(opts.TransformByObject, opts.DefaultTransform, opts.Scheme)
+	transformers, err := convertToByGVK(opts.TransformByObject, opts.DefaultTransform, opts.Scheme)
 	if err != nil {
 		return nil, err
 	}
-	transformByObj := internal.TransformFuncByObjectFromMap(transformByGVK)
+	transformByGVK := internal.TransformFuncByGVKFromMap(transformers)
 
 	internalSelectorsByGVK := internal.SelectorsByGVK{}
 	for gvk, selector := range selectorsByGVK {
 		internalSelectorsByGVK[gvk] = internal.Selector(selector)
 	}
 
-	im := internal.NewInformersMap(config, opts.Scheme, opts.Mapper, *opts.Resync, opts.Namespace, internalSelectorsByGVK, disableDeepCopyByGVK, transformByObj)
-	return &informerCache{InformersMap: im}, nil
+	return &informerCache{
+		scheme: opts.Scheme,
+		InformersMap: internal.NewInformersMap(config, &internal.InformersMapOptions{
+			Scheme:       opts.Scheme,
+			Mapper:       opts.Mapper,
+			ResyncPeriod: *opts.Resync,
+			Namespace:    opts.Namespace,
+			ByGVK: internal.InformersMapOptionsByGVK{
+				Selectors:       internalSelectorsByGVK,
+				DisableDeepCopy: disableDeepCopyByGVK,
+				Transformers:    transformByGVK,
+			},
+		}),
+	}, nil
 }
 
 // BuilderWithOptions returns a Cache constructor that will build a cache

pkg/cache/informer_cache.go

@@ -47,12 +47,13 @@ func (*ErrCacheNotStarted) Error() string {
 
 // informerCache is a Kubernetes Object cache populated from InformersMap.  informerCache wraps an InformersMap.
 type informerCache struct {
+	scheme *runtime.Scheme
 	*internal.InformersMap
 }
 
 // Get implements Reader.
 func (ip *informerCache) Get(ctx context.Context, key client.ObjectKey, out client.Object, opts ...client.GetOption) error {
-	gvk, err := apiutil.GVKForObject(out, ip.Scheme)
+	gvk, err := apiutil.GVKForObject(out, ip.scheme)
 	if err != nil {
 		return err
 	}
@@ -91,7 +92,7 @@ func (ip *informerCache) List(ctx context.Context, out client.ObjectList, opts .
 // for a single object corresponding to the passed-in list type. We need them
 // because they are used as cache map key.
 func (ip *informerCache) objectTypeForListObject(list client.ObjectList) (*schema.GroupVersionKind, runtime.Object, error) {
-	gvk, err := apiutil.GVKForObject(list, ip.Scheme)
+	gvk, err := apiutil.GVKForObject(list, ip.scheme)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -132,7 +133,7 @@ func (ip *informerCache) objectTypeForListObject(list client.ObjectList) (*schem
 // GetInformerForKind returns the informer for the GroupVersionKind.
 func (ip *informerCache) GetInformerForKind(ctx context.Context, gvk schema.GroupVersionKind) (Informer, error) {
 	// Map the gvk to an object
-	obj, err := ip.Scheme.New(gvk)
+	obj, err := ip.scheme.New(gvk)
 	if err != nil {
 		return nil, err
 	}
@@ -146,7 +147,7 @@ func (ip *informerCache) GetInformerForKind(ctx context.Context, gvk schema.Grou
 
 // GetInformer returns the informer for the obj.
 func (ip *informerCache) GetInformer(ctx context.Context, obj client.Object) (Informer, error) {
-	gvk, err := apiutil.GVKForObject(obj, ip.Scheme)
+	gvk, err := apiutil.GVKForObject(obj, ip.scheme)
 	if err != nil {
 		return nil, err
 	}

pkg/cache/informer_cache_unit_test.go

@@ -38,7 +38,8 @@ const (
 
 var _ = Describe("ip.objectTypeForListObject", func() {
 	ip := &informerCache{
-		InformersMap: &internal.InformersMap{Scheme: scheme.Scheme},
+		scheme:       scheme.Scheme,
+		InformersMap: &internal.InformersMap{},
 	}
 
 	It("should find the object type for unstructured lists", func() {
@@ -70,14 +71,14 @@ var _ = Describe("ip.objectTypeForListObject", func() {
 
 	It("should find the object type of a list with a slice of pointers items field", func() {
 		By("registering the type", func() {
-			ip.Scheme = runtime.NewScheme()
+			ip.scheme = runtime.NewScheme()
 			err := (&crscheme.Builder{
 				GroupVersion: schema.GroupVersion{Group: itemPointerSliceTypeGroupName, Version: itemPointerSliceTypeVersion},
 			}).
 				Register(
 					&controllertest.UnconventionalListType{},
 					&controllertest.UnconventionalListTypeList{},
-				).AddToScheme(ip.Scheme)
+				).AddToScheme(ip.scheme)
 			Expect(err).To(BeNil())
 		})