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customresource: stop shallow-copying metadata

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We no longer mutate anything in the genericregistry.Store, and the
self-link is deprecated, unset and not persisted in etcd. There is no
need to do the shallow-copies of metadata any longer.

Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>
This commit is contained in:
Steve Kuznetsov 2022-05-19 08:28:13 -07:00
parent b215a8949a
commit 6e6ec6c0ee
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GPG Key ID: 8821C29EC988D9B4
1 changed files with 0 additions and 57 deletions
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57
staging/src/k8s.io/apiextensions-apiserver/pkg/registry/customresource/etcd.go
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@ -23,7 +23,6 @@ import (
autoscalingv1 "k8s.io/api/autoscaling/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metainternalversion "k8s.io/apimachinery/pkg/apis/meta/internalversion"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
@ -118,59 +117,6 @@ func newREST(resource schema.GroupResource, kind, listKind schema.GroupVersionKi
// Implement CategoriesProvider
var _ rest.CategoriesProvider = &REST{}
// List returns a list of items matching labels and field according to the store's PredicateFunc.
func (e *REST) List(ctx context.Context, options *metainternalversion.ListOptions) (runtime.Object, error) {
l, err := e.Store.List(ctx, options)
if err != nil {
return nil, err
}
// Shallow copy ObjectMeta in returned list for each item. Native types have `Items []Item` fields and therefore
// implicitly shallow copy ObjectMeta. The generic store sets the self-link for each item. So this is necessary
// to avoid mutation of the objects from the cache.
if ul, ok := l.(*unstructured.UnstructuredList); ok {
for i := range ul.Items {
shallowCopyObjectMeta(&ul.Items[i])
}
}
return l, nil
}
func (r *REST) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
o, err := r.Store.Get(ctx, name, options)
if err != nil {
return nil, err
}
if u, ok := o.(*unstructured.Unstructured); ok {
shallowCopyObjectMeta(u)
}
return o, nil
}
func shallowCopyObjectMeta(u runtime.Unstructured) {
obj := shallowMapDeepCopy(u.UnstructuredContent())
if metadata, ok := obj["metadata"]; ok {
if metadata, ok := metadata.(map[string]interface{}); ok {
obj["metadata"] = shallowMapDeepCopy(metadata)
u.SetUnstructuredContent(obj)
}
}
}
func shallowMapDeepCopy(in map[string]interface{}) map[string]interface{} {
if in == nil {
return nil
}
out := make(map[string]interface{}, len(in))
for k, v := range in {
out[k] = v
}
return out
}
// Categories implements the CategoriesProvider interface. Returns a list of categories a resource is part of.
func (r *REST) Categories() []string {
return r.categories
@ -193,9 +139,6 @@ func (r *StatusREST) Get(ctx context.Context, name string, options *metav1.GetOp
if err != nil {
return nil, err
}
if u, ok := o.(*unstructured.Unstructured); ok {
shallowCopyObjectMeta(u)
}
return o, nil
}