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/discovery/v1beta1/zz_generated.deepcopy.go

@@ -0,0 +1,195 @@
+// +build !ignore_autogenerated
+
+/*
+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 deepcopy-gen. DO NOT EDIT.
+
+package v1beta1
+
+import (
+	v1 "k8s.io/api/core/v1"
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *Endpoint) DeepCopyInto(out *Endpoint) {
+	*out = *in
+	if in.Addresses != nil {
+		in, out := &in.Addresses, &out.Addresses
+		*out = make([]string, len(*in))
+		copy(*out, *in)
+	}
+	in.Conditions.DeepCopyInto(&out.Conditions)
+	if in.Hostname != nil {
+		in, out := &in.Hostname, &out.Hostname
+		*out = new(string)
+		**out = **in
+	}
+	if in.TargetRef != nil {
+		in, out := &in.TargetRef, &out.TargetRef
+		*out = new(v1.ObjectReference)
+		**out = **in
+	}
+	if in.Topology != nil {
+		in, out := &in.Topology, &out.Topology
+		*out = make(map[string]string, len(*in))
+		for key, val := range *in {
+			(*out)[key] = val
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new Endpoint.
+func (in *Endpoint) DeepCopy() *Endpoint {
+	if in == nil {
+		return nil
+	}
+	out := new(Endpoint)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *EndpointConditions) DeepCopyInto(out *EndpointConditions) {
+	*out = *in
+	if in.Ready != nil {
+		in, out := &in.Ready, &out.Ready
+		*out = new(bool)
+		**out = **in
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new EndpointConditions.
+func (in *EndpointConditions) DeepCopy() *EndpointConditions {
+	if in == nil {
+		return nil
+	}
+	out := new(EndpointConditions)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *EndpointPort) DeepCopyInto(out *EndpointPort) {
+	*out = *in
+	if in.Name != nil {
+		in, out := &in.Name, &out.Name
+		*out = new(string)
+		**out = **in
+	}
+	if in.Protocol != nil {
+		in, out := &in.Protocol, &out.Protocol
+		*out = new(v1.Protocol)
+		**out = **in
+	}
+	if in.Port != nil {
+		in, out := &in.Port, &out.Port
+		*out = new(int32)
+		**out = **in
+	}
+	if in.AppProtocol != nil {
+		in, out := &in.AppProtocol, &out.AppProtocol
+		*out = new(string)
+		**out = **in
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new EndpointPort.
+func (in *EndpointPort) DeepCopy() *EndpointPort {
+	if in == nil {
+		return nil
+	}
+	out := new(EndpointPort)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *EndpointSlice) DeepCopyInto(out *EndpointSlice) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ObjectMeta.DeepCopyInto(&out.ObjectMeta)
+	if in.Endpoints != nil {
+		in, out := &in.Endpoints, &out.Endpoints
+		*out = make([]Endpoint, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	if in.Ports != nil {
+		in, out := &in.Ports, &out.Ports
+		*out = make([]EndpointPort, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new EndpointSlice.
+func (in *EndpointSlice) DeepCopy() *EndpointSlice {
+	if in == nil {
+		return nil
+	}
+	out := new(EndpointSlice)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *EndpointSlice) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}
+
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *EndpointSliceList) DeepCopyInto(out *EndpointSliceList) {
+	*out = *in
+	out.TypeMeta = in.TypeMeta
+	in.ListMeta.DeepCopyInto(&out.ListMeta)
+	if in.Items != nil {
+		in, out := &in.Items, &out.Items
+		*out = make([]EndpointSlice, len(*in))
+		for i := range *in {
+			(*in)[i].DeepCopyInto(&(*out)[i])
+		}
+	}
+	return
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new EndpointSliceList.
+func (in *EndpointSliceList) DeepCopy() *EndpointSliceList {
+	if in == nil {
+		return nil
+	}
+	out := new(EndpointSliceList)
+	in.DeepCopyInto(out)
+	return out
+}
+
+// DeepCopyObject is an autogenerated deepcopy function, copying the receiver, creating a new runtime.Object.
+func (in *EndpointSliceList) DeepCopyObject() runtime.Object {
+	if c := in.DeepCopy(); c != nil {
+		return c
+	}
+	return nil
+}