vendor files

vendor/k8s.io/kubernetes/pkg/kubelet/container/ref.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2015 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 container
+
+import (
+	"fmt"
+
+	"k8s.io/api/core/v1"
+	ref "k8s.io/client-go/tools/reference"
+	"k8s.io/kubernetes/pkg/api/legacyscheme"
+)
+
+var ImplicitContainerPrefix string = "implicitly required container "
+
+// GenerateContainerRef returns an *v1.ObjectReference which references the given container
+// within the given pod. Returns an error if the reference can't be constructed or the
+// container doesn't actually belong to the pod.
+//
+// This function will return an error if the provided Pod does not have a selfLink,
+// but we expect selfLink to be populated at all call sites for the function.
+func GenerateContainerRef(pod *v1.Pod, container *v1.Container) (*v1.ObjectReference, error) {
+	fieldPath, err := fieldPath(pod, container)
+	if err != nil {
+		// TODO: figure out intelligent way to refer to containers that we implicitly
+		// start (like the pod infra container). This is not a good way, ugh.
+		fieldPath = ImplicitContainerPrefix + container.Name
+	}
+	ref, err := ref.GetPartialReference(legacyscheme.Scheme, pod, fieldPath)
+	if err != nil {
+		return nil, err
+	}
+	return ref, nil
+}
+
+// fieldPath returns a fieldPath locating container within pod.
+// Returns an error if the container isn't part of the pod.
+func fieldPath(pod *v1.Pod, container *v1.Container) (string, error) {
+	for i := range pod.Spec.Containers {
+		here := &pod.Spec.Containers[i]
+		if here.Name == container.Name {
+			if here.Name == "" {
+				return fmt.Sprintf("spec.containers[%d]", i), nil
+			} else {
+				return fmt.Sprintf("spec.containers{%s}", here.Name), nil
+			}
+		}
+	}
+	for i := range pod.Spec.InitContainers {
+		here := &pod.Spec.InitContainers[i]
+		if here.Name == container.Name {
+			if here.Name == "" {
+				return fmt.Sprintf("spec.initContainers[%d]", i), nil
+			} else {
+				return fmt.Sprintf("spec.initContainers{%s}", here.Name), nil
+			}
+		}
+	}
+	return "", fmt.Errorf("container %#v not found in pod %#v", container, pod)
+}