gistfile1.txt

package main

import (
	"context"
	"fmt"

	v1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
	"k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/fake"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

func getTestCRD() *v1.CustomResourceDefinition {
	return &v1.CustomResourceDefinition{
		ObjectMeta: metav1.ObjectMeta{
			Name: "testcrds.example.com",
		},
		Spec: v1.CustomResourceDefinitionSpec{
			Group: "example.com",
			Names: v1.CustomResourceDefinitionNames{
				Plural:   "testcrds",
				Singular: "testcrd",
				Kind:     "TestCRD",
			},
			Scope: v1.ClusterScoped,
			Versions: []v1.CustomResourceDefinitionVersion{
				{
					Name:    "v1",
					Served:  true,
					Storage: true,
					Schema: &v1.CustomResourceValidation{
						OpenAPIV3Schema: &v1.JSONSchemaProps{
							Type: "object",
							Properties: map[string]v1.JSONSchemaProps{
								"spec": {
									Type: "object",
									Properties: map[string]v1.JSONSchemaProps{
										"foo": {
											Type: "string",
										},
									},
								},
							},
						},
					},
				},
			},
		},
	}
}

func main() {
	ctx := context.TODO()
	crd := getTestCRD()

	client := fake.NewClientset() // fails with CRD
	// client := fake.NewSimpleClientset() // works with CRD

	_, err := client.ApiextensionsV1().CustomResourceDefinitions().Create(ctx, crd, metav1.CreateOptions{})
	if err != nil {
		fmt.Printf("Failed to create CRD: %v\n", err)
	} else {
		fmt.Println("CRD created successfully")
	}
}