mirror of https://github.com/k3s-io/k3s
107 lines
3.5 KiB
Go
107 lines
3.5 KiB
Go
/*
|
|
Copyright 2014 Google Inc. All rights reserved.
|
|
|
|
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 cmd
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
|
|
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
|
|
|
|
"github.com/spf13/cobra"
|
|
)
|
|
|
|
func AddPrinterFlags(cmd *cobra.Command) {
|
|
cmd.Flags().StringP("output", "o", "", "Output format: json|yaml|template|templatefile")
|
|
cmd.Flags().String("output-version", "", "Output the formatted object with the given version (default api-version)")
|
|
cmd.Flags().Bool("no-headers", false, "When using the default output, don't print headers")
|
|
cmd.Flags().StringP("template", "t", "", "Template string or path to template file to use when -o=template or -o=templatefile.")
|
|
}
|
|
|
|
// PrintObject prints an api object given command line flags to modify the output format
|
|
func PrintObject(cmd *cobra.Command, obj runtime.Object, f *Factory, out io.Writer) error {
|
|
mapper, _ := f.Object(cmd)
|
|
_, kind, err := api.Scheme.ObjectVersionAndKind(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
mapping, err := mapper.RESTMapping(kind)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
printer, err := PrinterForMapping(f, cmd, mapping)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return printer.PrintObj(obj, out)
|
|
}
|
|
|
|
// outputVersion returns the preferred output version for generic content (JSON, YAML, or templates)
|
|
func outputVersion(cmd *cobra.Command, defaultVersion string) string {
|
|
outputVersion := GetFlagString(cmd, "output-version")
|
|
if len(outputVersion) == 0 {
|
|
outputVersion = defaultVersion
|
|
}
|
|
return outputVersion
|
|
}
|
|
|
|
// PrinterForCommand returns the default printer for this command.
|
|
// Requires that printer flags have been added to cmd (see AddPrinterFlags).
|
|
func PrinterForCommand(cmd *cobra.Command) (kubectl.ResourcePrinter, bool, error) {
|
|
outputFormat := GetFlagString(cmd, "output")
|
|
templateFile := GetFlagString(cmd, "template")
|
|
if len(outputFormat) == 0 && len(templateFile) != 0 {
|
|
outputFormat = "template"
|
|
}
|
|
|
|
return kubectl.GetPrinter(outputFormat, templateFile)
|
|
}
|
|
|
|
// PrinterForMapping returns a printer suitable for displaying the provided resource type.
|
|
// Requires that printer flags have been added to cmd (see AddPrinterFlags).
|
|
func PrinterForMapping(f *Factory, cmd *cobra.Command, mapping *meta.RESTMapping) (kubectl.ResourcePrinter, error) {
|
|
printer, ok, err := PrinterForCommand(cmd)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if ok {
|
|
clientConfig, err := f.ClientConfig(cmd)
|
|
checkErr(err)
|
|
defaultVersion := clientConfig.Version
|
|
|
|
version := outputVersion(cmd, defaultVersion)
|
|
if len(version) == 0 {
|
|
version = mapping.APIVersion
|
|
}
|
|
if len(version) == 0 {
|
|
return nil, fmt.Errorf("you must specify an output-version when using this output format")
|
|
}
|
|
printer = kubectl.NewVersionedPrinter(printer, mapping.ObjectConvertor, version)
|
|
} else {
|
|
printer, err = f.Printer(cmd, mapping, GetFlagBool(cmd, "no-headers"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
return printer, nil
|
|
}
|