Merge pull request #692 from fluxcd/ssa-nits

ssa: prevent unnecessary `DeepCopy`

Author: hiddeco

ssa/manager_apply.go

@@ -92,7 +92,8 @@ func DefaultApplyOptions() ApplyOptions {
 // Drift detection is performed by comparing the server-side dry-run result with the existing object.
 // When immutable field changes are detected, the object is recreated if 'force' is set to 'true'.
 func (m *ResourceManager) Apply(ctx context.Context, object *unstructured.Unstructured, opts ApplyOptions) (*ChangeSetEntry, error) {
-	existingObject := object.DeepCopy()
+	existingObject := &unstructured.Unstructured{}
+	existingObject.SetGroupVersionKind(object.GroupVersionKind())
 	getError := m.client.Get(ctx, client.ObjectKeyFromObject(object), existingObject)
 
 	if m.shouldSkipApply(object, existingObject, opts) {
@@ -153,7 +154,8 @@ func (m *ResourceManager) ApplyAll(ctx context.Context, objects []*unstructured.
 			i, object := i, object
 
 			g.Go(func() error {
-				existingObject := object.DeepCopy()
+				existingObject := &unstructured.Unstructured{}
+				existingObject.SetGroupVersionKind(object.GroupVersionKind())
 				getError := m.client.Get(ctx, client.ObjectKeyFromObject(object), existingObject)
 
 				if m.shouldSkipApply(object, existingObject, opts) {

ssa/manager_delete.go

@@ -61,7 +61,8 @@ func DefaultDeleteOptions() DeleteOptions {
 // Delete deletes the given object (not found errors are ignored).
 func (m *ResourceManager) Delete(ctx context.Context, object *unstructured.Unstructured, opts DeleteOptions) (*ChangeSetEntry, error) {
 
-	existingObject := object.DeepCopy()
+	existingObject := &unstructured.Unstructured{}
+	existingObject.SetGroupVersionKind(object.GroupVersionKind())
 	err := m.client.Get(ctx, client.ObjectKeyFromObject(object), existingObject)
 	if err != nil {
 		if !apierrors.IsNotFound(err) {

ssa/manager_diff.go

@@ -19,6 +19,7 @@ package ssa
 
 import (
 	"context"
+
 	apiequality "k8s.io/apimachinery/pkg/api/equality"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -48,7 +49,8 @@ func (m *ResourceManager) Diff(ctx context.Context, object *unstructured.Unstruc
 	*unstructured.Unstructured,
 	error,
 ) {
-	existingObject := object.DeepCopy()
+	existingObject := &unstructured.Unstructured{}
+	existingObject.SetGroupVersionKind(object.GroupVersionKind())
 	_ = m.client.Get(ctx, client.ObjectKeyFromObject(object), existingObject)
 
 	if existingObject != nil && AnyInMetadata(existingObject, opts.Exclusions) {