Remove the dependency on cluster-api/utils from addons API

Signed-off-by: killianmuldoon <kmuldoon@vmware.com>

docs/book/src/developer/providers/migrations/v1.5-to-v1.6.md

@@ -18,7 +18,8 @@ maintainers of providers and consumers of our Go API.
 ## Changes by Kind
 
 ### Deprecation
-
+- The function `sigs.k8s.io/cluster-api/addons/api/v1beta1` `DeleteBinding` has been deprecated. Please use `RemoveBinding` from the same package instead.
+- 
 ### Removals
 
 - API version `v1alpha4` is not served in v1.6 (users can enable it manually in case they are lagging behind with deprecation cycles). Important: `v1alpha4` will be completely removed in 1.7.

exp/addons/api/v1beta1/clusterresourcesetbinding_types.go

@@ -20,8 +20,7 @@ import (
 	"reflect"
 
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-
-	"sigs.k8s.io/cluster-api/util"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 )
 
 // ANCHOR: ResourceBinding
@@ -97,7 +96,27 @@ func (c *ClusterResourceSetBinding) GetOrCreateBinding(clusterResourceSet *Clust
 	return binding
 }
 
+// RemoveBinding removes the ClusterResourceSet from the ClusterResourceSetBinding Bindings list.
+func (c *ClusterResourceSetBinding) RemoveBinding(clusterResourceSet *ClusterResourceSet) {
+	for i, binding := range c.Spec.Bindings {
+		if binding.ClusterResourceSetName == clusterResourceSet.Name {
+			copy(c.Spec.Bindings[i:], c.Spec.Bindings[i+1:])
+			c.Spec.Bindings = c.Spec.Bindings[:len(c.Spec.Bindings)-1]
+			break
+		}
+	}
+
+	// TODO(killianmuldoon): Remove this code in a future release. This is now duplicated in the controller.
+	c.OwnerReferences = removeOwnerRef(c.GetOwnerReferences(), metav1.OwnerReference{
+		APIVersion: clusterResourceSet.APIVersion,
+		Kind:       clusterResourceSet.Kind,
+		Name:       clusterResourceSet.Name,
+	})
+}
+
 // DeleteBinding removes the ClusterResourceSet from the ClusterResourceSetBinding Bindings list.
+//
+// Deprecated: This function is deprecated and will be removed in an upcoming release of Cluster API.
 func (c *ClusterResourceSetBinding) DeleteBinding(clusterResourceSet *ClusterResourceSet) {
 	for i, binding := range c.Spec.Bindings {
 		if binding.ClusterResourceSetName == clusterResourceSet.Name {
@@ -106,13 +125,53 @@ func (c *ClusterResourceSetBinding) DeleteBinding(clusterResourceSet *ClusterRes
 			break
 		}
 	}
-	c.OwnerReferences = util.RemoveOwnerRef(c.GetOwnerReferences(), metav1.OwnerReference{
+	c.OwnerReferences = removeOwnerRef(c.GetOwnerReferences(), metav1.OwnerReference{
 		APIVersion: clusterResourceSet.APIVersion,
 		Kind:       clusterResourceSet.Kind,
 		Name:       clusterResourceSet.Name,
 	})
 }
 
+// removeOwnerRef returns the slice of owner references after removing the supplied owner ref.
+// Note: removeOwnerRef ignores apiVersion and UID. It will remove the passed ownerReference where it matches Name, Group and Kind.
+//
+// Deprecated: This function is deprecated and will be removed in an upcoming release of Cluster API.
+func removeOwnerRef(ownerReferences []metav1.OwnerReference, inputRef metav1.OwnerReference) []metav1.OwnerReference {
+	if index := indexOwnerRef(ownerReferences, inputRef); index != -1 {
+		return append(ownerReferences[:index], ownerReferences[index+1:]...)
+	}
+	return ownerReferences
+}
+
+// indexOwnerRef returns the index of the owner reference in the slice if found, or -1.
+//
+// Deprecated: This function is deprecated and will be removed in an upcoming release of Cluster API.
+func indexOwnerRef(ownerReferences []metav1.OwnerReference, ref metav1.OwnerReference) int {
+	for index, r := range ownerReferences {
+		if referSameObject(r, ref) {
+			return index
+		}
+	}
+	return -1
+}
+
+// Returns true if a and b point to the same object based on Group, Kind and Name.
+//
+// Deprecated: This function is deprecated and will be removed in an upcoming release of Cluster API.
+func referSameObject(a, b metav1.OwnerReference) bool {
+	aGV, err := schema.ParseGroupVersion(a.APIVersion)
+	if err != nil {
+		return false
+	}
+
+	bGV, err := schema.ParseGroupVersion(b.APIVersion)
+	if err != nil {
+		return false
+	}
+
+	return aGV.Group == bGV.Group && a.Kind == b.Kind && a.Name == b.Name
+}
+
 // +kubebuilder:object:root=true
 // +kubebuilder:resource:path=clusterresourcesetbindings,scope=Namespaced,categories=cluster-api
 // +kubebuilder:subresource:status

exp/addons/internal/controllers/clusterresourceset_controller.go

@@ -196,7 +196,12 @@ func (r *ClusterResourceSetReconciler) reconcileDelete(ctx context.Context, clus
 			return err
 		}
 
-		clusterResourceSetBinding.DeleteBinding(crs)
+		clusterResourceSetBinding.RemoveBinding(crs)
+		clusterResourceSetBinding.OwnerReferences = util.RemoveOwnerRef(clusterResourceSetBinding.GetOwnerReferences(), metav1.OwnerReference{
+			APIVersion: crs.APIVersion,
+			Kind:       crs.Kind,
+			Name:       crs.Name,
+		})
 
 		// If CRS list is empty in the binding, delete the binding else
 		// attempt to Patch the ClusterResourceSetBinding object after delete reconciliation if there is at least 1 binding left.