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