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describe.go
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describe.go
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/*
Copyright 2018 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 versioned
import (
"fmt"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/kubernetes/pkg/kubectl/describe"
"k8s.io/kubernetes/pkg/printers"
printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
)
// DescriberFn gives a way to easily override the function for unit testing if needed
var DescriberFn describe.DescriberFunc = Describer
// Describer returns a Describer for displaying the specified RESTMapping type or an error.
func Describer(restClientGetter genericclioptions.RESTClientGetter, mapping *meta.RESTMapping) (printers.Describer, error) {
clientConfig, err := restClientGetter.ToRESTConfig()
if err != nil {
return nil, err
}
// try to get a describer
if describer, ok := printersinternal.DescriberFor(mapping.GroupVersionKind.GroupKind(), clientConfig); ok {
return describer, nil
}
// if this is a kind we don't have a describer for yet, go generic if possible
if genericDescriber, ok := printersinternal.GenericDescriberFor(mapping, clientConfig); ok {
return genericDescriber, nil
}
// otherwise return an unregistered error
return nil, fmt.Errorf("no description has been implemented for %s", mapping.GroupVersionKind.String())
}