monitoring dashboard dependency vendor

Signed-off-by: junotx <junotx@126.com>

vendor/k8s.io/cli-runtime/pkg/resource/crd_finder.go

@@ -0,0 +1,110 @@
+/*
+Copyright 2018 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 resource
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/dynamic"
+)
+
+// CRDGetter is a function that can download the list of GVK for all
+// CRDs.
+type CRDGetter func() ([]schema.GroupKind, error)
+
+func CRDFromDynamic(client dynamic.Interface) CRDGetter {
+	return func() ([]schema.GroupKind, error) {
+		list, err := client.Resource(schema.GroupVersionResource{
+			Group:    "apiextensions.k8s.io",
+			Version:  "v1beta1",
+			Resource: "customresourcedefinitions",
+		}).List(context.TODO(), metav1.ListOptions{})
+		if err != nil {
+			return nil, fmt.Errorf("failed to list CRDs: %v", err)
+		}
+		if list == nil {
+			return nil, nil
+		}
+
+		gks := []schema.GroupKind{}
+
+		// We need to parse the list to get the gvk, I guess that's fine.
+		for _, crd := range (*list).Items {
+			// Look for group, version, and kind
+			group, _, _ := unstructured.NestedString(crd.Object, "spec", "group")
+			kind, _, _ := unstructured.NestedString(crd.Object, "spec", "names", "kind")
+
+			gks = append(gks, schema.GroupKind{
+				Group: group,
+				Kind:  kind,
+			})
+		}
+
+		return gks, nil
+	}
+}
+
+// CRDFinder keeps a cache of known CRDs and finds a given GVK in the
+// list.
+type CRDFinder interface {
+	HasCRD(gvk schema.GroupKind) (bool, error)
+}
+
+func NewCRDFinder(getter CRDGetter) CRDFinder {
+	return &crdFinder{
+		getter: getter,
+	}
+}
+
+type crdFinder struct {
+	getter CRDGetter
+	cache  *[]schema.GroupKind
+}
+
+func (f *crdFinder) cacheCRDs() error {
+	if f.cache != nil {
+		return nil
+	}
+
+	list, err := f.getter()
+	if err != nil {
+		return err
+	}
+	f.cache = &list
+	return nil
+}
+
+func (f *crdFinder) findCRD(gvk schema.GroupKind) bool {
+	for _, crd := range *f.cache {
+		if reflect.DeepEqual(gvk, crd) {
+			return true
+		}
+	}
+	return false
+}
+
+func (f *crdFinder) HasCRD(gvk schema.GroupKind) (bool, error) {
+	if err := f.cacheCRDs(); err != nil {
+		return false, err
+	}
+	return f.findCRD(gvk), nil
+}