Vendor main dependencies.

vendor/k8s.io/client-go/1.5/pkg/api/context.go

@@ -0,0 +1,152 @@
+/*
+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 api
+
+import (
+	stderrs "errors"
+	"time"
+
+	"golang.org/x/net/context"
+	"k8s.io/client-go/1.5/pkg/auth/user"
+	"k8s.io/client-go/1.5/pkg/types"
+)
+
+// Context carries values across API boundaries.
+// This context matches the context.Context interface
+// (https://blog.golang.org/context), for the purposes
+// of passing the api.Context through to the storage tier.
+// TODO: Determine the extent that this abstraction+interface
+// is used by the api, and whether we can remove.
+type Context interface {
+	// Value returns the value associated with key or nil if none.
+	Value(key interface{}) interface{}
+
+	// Deadline returns the time when this Context will be canceled, if any.
+	Deadline() (deadline time.Time, ok bool)
+
+	// Done returns a channel that is closed when this Context is canceled
+	// or times out.
+	Done() <-chan struct{}
+
+	// Err indicates why this context was canceled, after the Done channel
+	// is closed.
+	Err() error
+}
+
+// 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
+
+	// uidKey is the context key for the uid to assign to an object on create.
+	uidKey
+
+	// userAgentKey is the context key for the request user agent.
+	userAgentKey
+)
+
+// NewContext instantiates a base context object for request flows.
+func NewContext() Context {
+	return context.TODO()
+}
+
+// NewDefaultContext instantiates a base context object for request flows in the default namespace
+func NewDefaultContext() Context {
+	return WithNamespace(NewContext(), NamespaceDefault)
+}
+
+// WithValue returns a copy of parent in which the value associated with key is val.
+func WithValue(parent Context, key interface{}, val interface{}) Context {
+	internalCtx, ok := parent.(context.Context)
+	if !ok {
+		panic(stderrs.New("Invalid context type"))
+	}
+	return context.WithValue(internalCtx, key, val)
+}
+
+// WithNamespace returns a copy of parent in which the namespace value is set
+func WithNamespace(parent Context, namespace string) Context {
+	return WithValue(parent, namespaceKey, namespace)
+}
+
+// NamespaceFrom returns the value of the namespace key on the ctx
+func NamespaceFrom(ctx 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) string {
+	namespace, _ := NamespaceFrom(ctx)
+	return namespace
+}
+
+// ValidNamespace returns false if the namespace on the context differs from the resource.  If the resource has no namespace, it is set to the value in the context.
+func ValidNamespace(ctx Context, resource *ObjectMeta) bool {
+	ns, ok := NamespaceFrom(ctx)
+	if len(resource.Namespace) == 0 {
+		resource.Namespace = ns
+	}
+	return ns == resource.Namespace && ok
+}
+
+// WithNamespaceDefaultIfNone returns a context whose namespace is the default if and only if the parent context has no namespace value
+func WithNamespaceDefaultIfNone(parent Context) Context {
+	namespace, ok := NamespaceFrom(parent)
+	if !ok || len(namespace) == 0 {
+		return WithNamespace(parent, NamespaceDefault)
+	}
+	return parent
+}
+
+// WithUser returns a copy of parent in which the user value is set
+func WithUser(parent Context, user user.Info) Context {
+	return WithValue(parent, userKey, user)
+}
+
+// UserFrom returns the value of the user key on the ctx
+func UserFrom(ctx Context) (user.Info, bool) {
+	user, ok := ctx.Value(userKey).(user.Info)
+	return user, ok
+}
+
+// WithUID returns a copy of parent in which the uid value is set
+func WithUID(parent Context, uid types.UID) Context {
+	return WithValue(parent, uidKey, uid)
+}
+
+// UIDFrom returns the value of the uid key on the ctx
+func UIDFrom(ctx Context) (types.UID, bool) {
+	uid, ok := ctx.Value(uidKey).(types.UID)
+	return uid, ok
+}
+
+// WithUserAgent returns a copy of parent in which the user value is set
+func WithUserAgent(parent Context, userAgent string) Context {
+	return WithValue(parent, userAgentKey, userAgent)
+}
+
+// UserAgentFrom returns the value of the userAgent key on the ctx
+func UserAgentFrom(ctx Context) (string, bool) {
+	userAgent, ok := ctx.Value(userAgentKey).(string)
+	return userAgent, ok
+}