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70 lines
2.5 KiB
70 lines
2.5 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kube // import "helm.sh/helm/v3/pkg/kube"
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import (
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"sync"
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apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
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apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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"k8s.io/apimachinery/pkg/api/meta"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/cli-runtime/pkg/resource"
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"k8s.io/client-go/kubernetes/scheme"
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)
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var k8sNativeScheme *runtime.Scheme
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var k8sNativeSchemeOnce sync.Once
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// AsVersioned converts the given info into a runtime.Object with the correct
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// group and version set
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func AsVersioned(info *resource.Info) runtime.Object {
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return convertWithMapper(info.Object, info.Mapping)
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}
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// convertWithMapper converts the given object with the optional provided
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// RESTMapping. If no mapping is provided, the default schema versioner is used
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func convertWithMapper(obj runtime.Object, mapping *meta.RESTMapping) runtime.Object {
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s := kubernetesNativeScheme()
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var gv = runtime.GroupVersioner(schema.GroupVersions(s.PrioritizedVersionsAllGroups()))
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if mapping != nil {
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gv = mapping.GroupVersionKind.GroupVersion()
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}
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if obj, err := runtime.ObjectConvertor(s).ConvertToVersion(obj, gv); err == nil {
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return obj
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}
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return obj
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}
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// kubernetesNativeScheme returns a clean *runtime.Scheme with _only_ Kubernetes
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// native resources added to it. This is required to break free of custom resources
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// that may have been added to scheme.Scheme due to Helm being used as a package in
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// combination with e.g. a versioned kube client. If we would not do this, the client
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// may attempt to perform e.g. a 3-way-merge strategy patch for custom resources.
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func kubernetesNativeScheme() *runtime.Scheme {
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k8sNativeSchemeOnce.Do(func() {
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k8sNativeScheme = runtime.NewScheme()
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scheme.AddToScheme(k8sNativeScheme)
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// API extensions are not in the above scheme set,
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// and must thus be added separately.
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apiextensionsv1beta1.AddToScheme(k8sNativeScheme)
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apiextensionsv1.AddToScheme(k8sNativeScheme)
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})
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return k8sNativeScheme
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}
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