1. update clientset, deepcopy using code-generator

2. add a dummy file tools.go to force "go mod vendor" to see
code-generator as dependencies
3. add a script to update CRD
4. add a README to document CRD updating steps
run go mod tidy
update README

vendor/k8s.io/client-go/informers/storage/v1/csinode.go

@@ -0,0 +1,88 @@
+/*
+Copyright 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.
+*/
+
+// Code generated by informer-gen. DO NOT EDIT.
+
+package v1
+
+import (
+	time "time"
+
+	storagev1 "k8s.io/api/storage/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+	watch "k8s.io/apimachinery/pkg/watch"
+	internalinterfaces "k8s.io/client-go/informers/internalinterfaces"
+	kubernetes "k8s.io/client-go/kubernetes"
+	v1 "k8s.io/client-go/listers/storage/v1"
+	cache "k8s.io/client-go/tools/cache"
+)
+
+// CSINodeInformer provides access to a shared informer and lister for
+// CSINodes.
+type CSINodeInformer interface {
+	Informer() cache.SharedIndexInformer
+	Lister() v1.CSINodeLister
+}
+
+type cSINodeInformer struct {
+	factory          internalinterfaces.SharedInformerFactory
+	tweakListOptions internalinterfaces.TweakListOptionsFunc
+}
+
+// NewCSINodeInformer constructs a new informer for CSINode type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewCSINodeInformer(client kubernetes.Interface, resyncPeriod time.Duration, indexers cache.Indexers) cache.SharedIndexInformer {
+	return NewFilteredCSINodeInformer(client, resyncPeriod, indexers, nil)
+}
+
+// NewFilteredCSINodeInformer constructs a new informer for CSINode type.
+// Always prefer using an informer factory to get a shared informer instead of getting an independent
+// one. This reduces memory footprint and number of connections to the server.
+func NewFilteredCSINodeInformer(client kubernetes.Interface, resyncPeriod time.Duration, indexers cache.Indexers, tweakListOptions internalinterfaces.TweakListOptionsFunc) cache.SharedIndexInformer {
+	return cache.NewSharedIndexInformer(
+		&cache.ListWatch{
+			ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.StorageV1().CSINodes().List(options)
+			},
+			WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+				if tweakListOptions != nil {
+					tweakListOptions(&options)
+				}
+				return client.StorageV1().CSINodes().Watch(options)
+			},
+		},
+		&storagev1.CSINode{},
+		resyncPeriod,
+		indexers,
+	)
+}
+
+func (f *cSINodeInformer) defaultInformer(client kubernetes.Interface, resyncPeriod time.Duration) cache.SharedIndexInformer {
+	return NewFilteredCSINodeInformer(client, resyncPeriod, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, f.tweakListOptions)
+}
+
+func (f *cSINodeInformer) Informer() cache.SharedIndexInformer {
+	return f.factory.InformerFor(&storagev1.CSINode{}, f.defaultInformer)
+}
+
+func (f *cSINodeInformer) Lister() v1.CSINodeLister {
+	return v1.NewCSINodeLister(f.Informer().GetIndexer())
+}

vendor/k8s.io/client-go/informers/storage/v1/interface.go

@@ -24,6 +24,8 @@ import (
 
 // Interface provides access to all the informers in this group version.
 type Interface interface {
+	// CSINodes returns a CSINodeInformer.
+	CSINodes() CSINodeInformer
 	// StorageClasses returns a StorageClassInformer.
 	StorageClasses() StorageClassInformer
 	// VolumeAttachments returns a VolumeAttachmentInformer.
@@ -41,6 +43,11 @@ func New(f internalinterfaces.SharedInformerFactory, namespace string, tweakList
 	return &version{factory: f, namespace: namespace, tweakListOptions: tweakListOptions}
 }
 
+// CSINodes returns a CSINodeInformer.
+func (v *version) CSINodes() CSINodeInformer {
+	return &cSINodeInformer{factory: v.factory, tweakListOptions: v.tweakListOptions}
+}
+
 // StorageClasses returns a StorageClassInformer.
 func (v *version) StorageClasses() StorageClassInformer {
 	return &storageClassInformer{factory: v.factory, tweakListOptions: v.tweakListOptions}