rebase: update kubernetes to v1.20.0

updated kubernetes packages to latest
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/apiserver/pkg/endpoints/request/context.go

@@ -0,0 +1,96 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package request
+
+import (
+	"context"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apiserver/pkg/apis/audit"
+	"k8s.io/apiserver/pkg/authentication/user"
+)
+
+// The key type is unexported to prevent collisions
+type key int
+
+const (
+	// namespaceKey is the context key for the request namespace.
+	namespaceKey key = iota
+
+	// userKey is the context key for the request user.
+	userKey
+
+	// auditKey is the context key for the audit event.
+	auditKey
+
+	// audiencesKey is the context key for request audiences.
+	audiencesKey
+)
+
+// NewContext instantiates a base context object for request flows.
+func NewContext() context.Context {
+	return context.TODO()
+}
+
+// NewDefaultContext instantiates a base context object for request flows in the default namespace
+func NewDefaultContext() context.Context {
+	return WithNamespace(NewContext(), metav1.NamespaceDefault)
+}
+
+// WithValue returns a copy of parent in which the value associated with key is val.
+func WithValue(parent context.Context, key interface{}, val interface{}) context.Context {
+	return context.WithValue(parent, key, val)
+}
+
+// WithNamespace returns a copy of parent in which the namespace value is set
+func WithNamespace(parent context.Context, namespace string) context.Context {
+	return WithValue(parent, namespaceKey, namespace)
+}
+
+// NamespaceFrom returns the value of the namespace key on the ctx
+func NamespaceFrom(ctx context.Context) (string, bool) {
+	namespace, ok := ctx.Value(namespaceKey).(string)
+	return namespace, ok
+}
+
+// NamespaceValue returns the value of the namespace key on the ctx, or the empty string if none
+func NamespaceValue(ctx context.Context) string {
+	namespace, _ := NamespaceFrom(ctx)
+	return namespace
+}
+
+// WithUser returns a copy of parent in which the user value is set
+func WithUser(parent context.Context, user user.Info) context.Context {
+	return WithValue(parent, userKey, user)
+}
+
+// UserFrom returns the value of the user key on the ctx
+func UserFrom(ctx context.Context) (user.Info, bool) {
+	user, ok := ctx.Value(userKey).(user.Info)
+	return user, ok
+}
+
+// WithAuditEvent returns set audit event struct.
+func WithAuditEvent(parent context.Context, ev *audit.Event) context.Context {
+	return WithValue(parent, auditKey, ev)
+}
+
+// AuditEventFrom returns the audit event struct on the ctx
+func AuditEventFrom(ctx context.Context) *audit.Event {
+	ev, _ := ctx.Value(auditKey).(*audit.Event)
+	return ev
+}