mirror of https://github.com/k3s-io/k3s
80 lines
2.6 KiB
Go
80 lines
2.6 KiB
Go
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/*
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Copyright 2018 The Kubernetes 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 conversion
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import (
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"errors"
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"fmt"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// nopConverter is a converter that only sets the apiVersion fields, but does not real conversion.
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type nopConverter struct {
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validVersions map[schema.GroupVersion]bool
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}
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var _ runtime.ObjectConvertor = &nopConverter{}
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func (nopConverter) ConvertFieldLabel(gvk schema.GroupVersionKind, label, value string) (string, string, error) {
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return "", "", errors.New("unstructured cannot convert field labels")
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}
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func (c *nopConverter) Convert(in, out, context interface{}) error {
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unstructIn, ok := in.(*unstructured.Unstructured)
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if !ok {
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return fmt.Errorf("input type %T in not valid for unstructured conversion", in)
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}
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unstructOut, ok := out.(*unstructured.Unstructured)
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if !ok {
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return fmt.Errorf("output type %T in not valid for unstructured conversion", out)
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}
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outGVK := unstructOut.GroupVersionKind()
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if !c.validVersions[outGVK.GroupVersion()] {
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return fmt.Errorf("request to convert CR from an invalid group/version: %s", outGVK.String())
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}
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inGVK := unstructIn.GroupVersionKind()
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if !c.validVersions[inGVK.GroupVersion()] {
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return fmt.Errorf("request to convert CR to an invalid group/version: %s", inGVK.String())
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}
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unstructOut.SetUnstructuredContent(unstructIn.UnstructuredContent())
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_, err := c.ConvertToVersion(unstructOut, outGVK.GroupVersion())
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if err != nil {
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return err
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}
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return nil
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}
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func (c *nopConverter) ConvertToVersion(in runtime.Object, target runtime.GroupVersioner) (runtime.Object, error) {
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kind := in.GetObjectKind().GroupVersionKind()
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gvk, ok := target.KindForGroupVersionKinds([]schema.GroupVersionKind{kind})
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if !ok {
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// TODO: should this be a typed error?
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return nil, fmt.Errorf("%v is unstructured and is not suitable for converting to %q", kind, target)
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}
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if !c.validVersions[gvk.GroupVersion()] {
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return nil, fmt.Errorf("request to convert CR to an invalid group/version: %s", gvk.String())
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}
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in.GetObjectKind().SetGroupVersionKind(gvk)
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return in, nil
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}
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