git subrepo clone (merge) https://github.com/kubernetes-incubator/metrics-server.git metrics-server
subrepo:
subdir: "metrics-server"
merged: "92d8412"
upstream:
origin: "https://github.com/kubernetes-incubator/metrics-server.git"
branch: "master"
commit: "92d8412"
git-subrepo:
version: "0.4.0"
origin: "???"
commit: "???"
diff --git a/metrics-server/vendor/k8s.io/apiserver/pkg/admission/chain.go b/metrics-server/vendor/k8s.io/apiserver/pkg/admission/chain.go
new file mode 100644
index 0000000..011641f
--- /dev/null
+++ b/metrics-server/vendor/k8s.io/apiserver/pkg/admission/chain.go
@@ -0,0 +1,68 @@
+/*
+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 admission
+
+// chainAdmissionHandler is an instance of admission.NamedHandler that performs admission control using
+// a chain of admission handlers
+type chainAdmissionHandler []Interface
+
+// NewChainHandler creates a new chain handler from an array of handlers. Used for testing.
+func NewChainHandler(handlers ...Interface) chainAdmissionHandler {
+ return chainAdmissionHandler(handlers)
+}
+
+// Admit performs an admission control check using a chain of handlers, and returns immediately on first error
+func (admissionHandler chainAdmissionHandler) Admit(a Attributes) error {
+ for _, handler := range admissionHandler {
+ if !handler.Handles(a.GetOperation()) {
+ continue
+ }
+ if mutator, ok := handler.(MutationInterface); ok {
+ err := mutator.Admit(a)
+ if err != nil {
+ return err
+ }
+ }
+ }
+ return nil
+}
+
+// Validate performs an admission control check using a chain of handlers, and returns immediately on first error
+func (admissionHandler chainAdmissionHandler) Validate(a Attributes) error {
+ for _, handler := range admissionHandler {
+ if !handler.Handles(a.GetOperation()) {
+ continue
+ }
+ if validator, ok := handler.(ValidationInterface); ok {
+ err := validator.Validate(a)
+ if err != nil {
+ return err
+ }
+ }
+ }
+ return nil
+}
+
+// Handles will return true if any of the handlers handles the given operation
+func (admissionHandler chainAdmissionHandler) Handles(operation Operation) bool {
+ for _, handler := range admissionHandler {
+ if handler.Handles(operation) {
+ return true
+ }
+ }
+ return false
+}