ingress-nginx-helm/internal/admission/controller/convert.go

/*
Copyright 2020 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 controller

import (
	"unsafe"

	admissionv1 "k8s.io/api/admission/v1"
	admissionv1beta1 "k8s.io/api/admission/v1beta1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"
)

// these conversions are copied from https://github.com/kubernetes/kubernetes/blob/4db3a096ce8ac730b2280494422e1c4cf5fe875e/pkg/apis/admission/v1beta1/zz_generated.conversion.go
// to avoid copying in kubernetes/kubernetes
// they are sightly modified to remove complexity

func convertV1beta1AdmissionReviewToAdmissionAdmissionReview(in *admissionv1beta1.AdmissionReview, out *admissionv1.AdmissionReview) {
	if in.Request != nil {
		if out.Request == nil {
			out.Request = &admissionv1.AdmissionRequest{}
		}
		in, out := &in.Request, &out.Request
		*out = new(admissionv1.AdmissionRequest)
		convertV1beta1AdmissionRequestToAdmissionAdmissionRequest(*in, *out)
	} else {
		out.Request = nil
	}
	out.Response = (*admissionv1.AdmissionResponse)(unsafe.Pointer(in.Response)) // #nosec
}

func convertV1beta1AdmissionRequestToAdmissionAdmissionRequest(in *admissionv1beta1.AdmissionRequest, out *admissionv1.AdmissionRequest) {
	out.UID = types.UID(in.UID)
	out.Kind = in.Kind
	out.Resource = in.Resource
	out.SubResource = in.SubResource
	out.RequestKind = (*metav1.GroupVersionKind)(unsafe.Pointer(in.RequestKind))             // #nosec
	out.RequestResource = (*metav1.GroupVersionResource)(unsafe.Pointer(in.RequestResource)) // #nosec
	out.RequestSubResource = in.RequestSubResource
	out.Name = in.Name
	out.Namespace = in.Namespace
	out.Operation = admissionv1.Operation(in.Operation)
	out.Object = in.Object
	out.OldObject = in.OldObject
	out.Options = in.Options
}

func convertAdmissionAdmissionReviewToV1beta1AdmissionReview(in *admissionv1.AdmissionReview, out *admissionv1beta1.AdmissionReview) {
	if in.Request != nil {
		if out.Request == nil {
			out.Request = &admissionv1beta1.AdmissionRequest{}
		}
		in, out := &in.Request, &out.Request
		*out = new(admissionv1beta1.AdmissionRequest)
		convertAdmissionAdmissionRequestToV1beta1AdmissionRequest(*in, *out)
	} else {
		out.Request = nil
	}
	out.Response = (*admissionv1beta1.AdmissionResponse)(unsafe.Pointer(in.Response)) // #nosec
}

func convertAdmissionAdmissionRequestToV1beta1AdmissionRequest(in *admissionv1.AdmissionRequest, out *admissionv1beta1.AdmissionRequest) {
	out.UID = types.UID(in.UID)
	out.Kind = in.Kind
	out.Resource = in.Resource
	out.SubResource = in.SubResource
	out.RequestKind = (*metav1.GroupVersionKind)(unsafe.Pointer(in.RequestKind))             // #nosec
	out.RequestResource = (*metav1.GroupVersionResource)(unsafe.Pointer(in.RequestResource)) // #nosec
	out.RequestSubResource = in.RequestSubResource
	out.Name = in.Name
	out.Namespace = in.Namespace
	out.Operation = admissionv1beta1.Operation(in.Operation)
	out.Object = in.Object
	out.OldObject = in.OldObject
	out.Options = in.Options
}