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/api/autoscaling/v2beta1/generated.proto

@@ -32,7 +32,7 @@ option go_package = "v2beta1";
 
 // CrossVersionObjectReference contains enough information to let you identify the referred resource.
 message CrossVersionObjectReference {
-  // Kind of the referent; More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds"
+  // Kind of the referent; More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds"
   optional string kind = 1;
 
   // Name of the referent; More info: http://kubernetes.io/docs/user-guide/identifiers#names
@@ -92,12 +92,12 @@ message ExternalMetricStatus {
 // implementing the scale subresource based on the metrics specified.
 message HorizontalPodAutoscaler {
   // metadata is the standard object metadata.
-  // More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
+  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
   // +optional
   optional k8s.io.apimachinery.pkg.apis.meta.v1.ObjectMeta metadata = 1;
 
   // spec is the specification for the behaviour of the autoscaler.
-  // More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status.
+  // More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status.
   // +optional
   optional HorizontalPodAutoscalerSpec spec = 2;
 

vendor/k8s.io/api/autoscaling/v2beta1/types.go

@@ -24,7 +24,7 @@ import (
 
 // CrossVersionObjectReference contains enough information to let you identify the referred resource.
 type CrossVersionObjectReference struct {
-	// Kind of the referent; More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds"
+	// Kind of the referent; More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds"
 	Kind string `json:"kind" protobuf:"bytes,1,opt,name=kind"`
 	// Name of the referent; More info: http://kubernetes.io/docs/user-guide/identifiers#names
 	Name string `json:"name" protobuf:"bytes,2,opt,name=name"`
@@ -62,7 +62,7 @@ type HorizontalPodAutoscalerSpec struct {
 // MetricSourceType indicates the type of metric.
 type MetricSourceType string
 
-var (
+const (
 	// ObjectMetricSourceType is a metric describing a kubernetes object
 	// (for example, hits-per-second on an Ingress object).
 	ObjectMetricSourceType MetricSourceType = "Object"
@@ -231,7 +231,7 @@ type HorizontalPodAutoscalerStatus struct {
 // a HorizontalPodAutoscaler.
 type HorizontalPodAutoscalerConditionType string
 
-var (
+const (
 	// ScalingActive indicates that the HPA controller is able to scale if necessary:
 	// it's correctly configured, can fetch the desired metrics, and isn't disabled.
 	ScalingActive HorizontalPodAutoscalerConditionType = "ScalingActive"
@@ -380,12 +380,12 @@ type ExternalMetricStatus struct {
 type HorizontalPodAutoscaler struct {
 	metav1.TypeMeta `json:",inline"`
 	// metadata is the standard object metadata.
-	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
+	// More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
 	// +optional
 	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`
 
 	// spec is the specification for the behaviour of the autoscaler.
-	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status.
+	// More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status.
 	// +optional
 	Spec HorizontalPodAutoscalerSpec `json:"spec,omitempty" protobuf:"bytes,2,opt,name=spec"`
 

vendor/k8s.io/api/autoscaling/v2beta1/types_swagger_doc_generated.go

@@ -29,7 +29,7 @@ package v2beta1
 // AUTO-GENERATED FUNCTIONS START HERE. DO NOT EDIT.
 var map_CrossVersionObjectReference = map[string]string{
 	"":           "CrossVersionObjectReference contains enough information to let you identify the referred resource.",
-	"kind":       "Kind of the referent; More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#types-kinds\"",
+	"kind":       "Kind of the referent; More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds\"",
 	"name":       "Name of the referent; More info: http://kubernetes.io/docs/user-guide/identifiers#names",
 	"apiVersion": "API version of the referent",
 }
@@ -64,8 +64,8 @@ func (ExternalMetricStatus) SwaggerDoc() map[string]string {
 
 var map_HorizontalPodAutoscaler = map[string]string{
 	"":         "HorizontalPodAutoscaler is the configuration for a horizontal pod autoscaler, which automatically manages the replica count of any resource implementing the scale subresource based on the metrics specified.",
-	"metadata": "metadata is the standard object metadata. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata",
-	"spec":     "spec is the specification for the behaviour of the autoscaler. More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status.",
+	"metadata": "metadata is the standard object metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata",
+	"spec":     "spec is the specification for the behaviour of the autoscaler. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status.",
 	"status":   "status is the current information about the autoscaler.",
 }