Add GroupDiscoveryFailedErrorGroups helper method

Kubernetes-commit: 733f63c6c423565b8cecf3f3db8e9d81e48b1311

discovery/discovery_client.go

@@ -19,6 +19,7 @@ package discovery
 import (
  "context"
  "encoding/json"
+ goerrors "errors"
  "fmt"
  "mime"
  "net/http"
@@ -422,6 +423,16 @@ func IsGroupDiscoveryFailedError(err error) bool {
  return err != nil && ok
 }
 
+// GroupDiscoveryFailedErrorGroups returns true if the error is an ErrGroupDiscoveryFailed error,
+// along with the map of group versions that failed discovery.
+func GroupDiscoveryFailedErrorGroups(err error) (map[schema.GroupVersion]error, bool) {
+ var groupDiscoveryError *ErrGroupDiscoveryFailed
+ if err != nil && goerrors.As(err, &groupDiscoveryError) {
+ return groupDiscoveryError.Groups, true
+ }
+ return nil, false
+}
+
 func ServerGroupsAndResources(d DiscoveryInterface) ([]*metav1.APIGroup, []*metav1.APIResourceList, error) {
  var sgs *metav1.APIGroupList
  var resources []*metav1.APIResourceList