995c5a07ea
Fix kubectl -o error message:
Before this change:
```shell
kubectl get pods -o foo
error: unable to match a printer suitable for the output format "" and the options specified: &get.PrintFlags{JSONYamlPrintFlags:(*genericclioptions.JSONYamlPrintFlags)(0x23aa610), NamePrintFlags:(*genericclioptions.NamePrintFlags)(0xc42058b4e0), TemplateFlags:(*printers.KubeTemplatePrintFlags)(0xc4206765e0), CustomColumnsFlags:(*printers.CustomColumnsPrintFlags)(0xc420676620), HumanReadableFlags:(*get.HumanPrintFlags)(0xc4204eb180), NoHeaders:(*bool)(0xc4206fefbc), OutputFormat:(*string)(0xc42058b4d0)}
```
After this change:
```shell
Kubectl get pods -o foo
error: unable to match a printer suitable for the output format "aaa", allowed formats are: custom-columns,custom-columns-file,go-template,go-template-file,json,jsonpath,jsonpath-file,name,template,templatefile,wide,yaml
```
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
/*
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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 genericclioptions
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import (
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"fmt"
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"strings"
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"github.com/spf13/cobra"
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"k8s.io/kubernetes/pkg/kubectl/genericclioptions/printers"
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)
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// NamePrintFlags provides default flags necessary for printing
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// a resource's fully-qualified Kind.group/name, or a successful
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// message about that resource if an Operation is provided.
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type NamePrintFlags struct {
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// Operation describes the name of the action that
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// took place on an object, to be included in the
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// finalized "successful" message.
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Operation string
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}
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func (f *NamePrintFlags) Complete(successTemplate string) error {
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f.Operation = fmt.Sprintf(successTemplate, f.Operation)
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return nil
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}
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func (f *NamePrintFlags) AllowedFormats() []string {
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return []string{"name"}
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}
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// ToPrinter receives an outputFormat and returns a printer capable of
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// handling --output=name printing.
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// Returns false if the specified outputFormat does not match a supported format.
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// Supported format types can be found in pkg/printers/printers.go
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func (f *NamePrintFlags) ToPrinter(outputFormat string) (printers.ResourcePrinter, error) {
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namePrinter := &printers.NamePrinter{
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Operation: f.Operation,
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}
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outputFormat = strings.ToLower(outputFormat)
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switch outputFormat {
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case "name":
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namePrinter.ShortOutput = true
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fallthrough
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case "":
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return namePrinter, nil
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default:
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return nil, NoCompatiblePrinterError{OutputFormat: &outputFormat, AllowedFormats: f.AllowedFormats()}
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}
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}
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// AddFlags receives a *cobra.Command reference and binds
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// flags related to name printing to it
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func (f *NamePrintFlags) AddFlags(c *cobra.Command) {}
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// NewNamePrintFlags returns flags associated with
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// --name printing, with default values set.
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func NewNamePrintFlags(operation string) *NamePrintFlags {
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return &NamePrintFlags{
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Operation: operation,
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}
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}
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