Generate Applyconfigurations to enable SSA

Server-side-apply needs its own structs to keep track of which fields
are actually touched.

This change only enables the generation of the configuration without
making use of it yet.

Author: fwiesel

Makefile

@@ -48,11 +48,17 @@ help: ## Display this help.
 
 .PHONY: manifests
 manifests: controller-gen ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
-	$(CONTROLLER_GEN) rbac:roleName=manager-role crd webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+	$(CONTROLLER_GEN) \
+		paths="./internal/..." \
+		rbac:roleName=manager-role crd webhook \
+		output:crd:artifacts:config=config/crd/bases
 
 .PHONY: generate
-generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
-	$(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..."
+generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations and applyconfigurations
+	$(CONTROLLER_GEN) \
+		paths="./api/..." \
+		object:headerFile="hack/boilerplate.go.txt" \
+		applyconfiguration:headerFile="hack/boilerplate.go.txt"
 
 .PHONY: fmt
 fmt: ## Run go fmt against code.

api/v1/groupversion_info.go

@@ -16,6 +16,8 @@ limitations under the License.
 */
 
 // Package v1 contains API Schema definitions for the kvm v1 API group
+// +kubebuilder:ac:generate=true
+// +kubebuilder:ac:output:package=../../applyconfigurations
 // +kubebuilder:object:generate=true
 // +groupName=kvm.cloud.sap
 package v1
@@ -34,4 +36,7 @@ var (
 
 	// AddToScheme adds the types in this group-version to the given scheme.
 	AddToScheme = SchemeBuilder.AddToScheme
+
+	// Workaround: https://github.com/kubernetes-sigs/controller-tools/issues/1193
+	SchemeGroupVersion = GroupVersion
 )