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https://github.com/k3s-io/kubernetes.git
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Display an external version of the object for --output
Use the version of the API the RESTMapper prefers (currently)
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@ -84,7 +84,7 @@ Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
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cmds.PersistentFlags().StringP("server", "s", "", "Kubernetes apiserver to connect to")
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cmds.PersistentFlags().StringP("auth-path", "a", os.Getenv("HOME")+"/.kubernetes_auth", "Path to the auth info file. If missing, prompt the user. Only used if using https.")
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cmds.PersistentFlags().Bool("match-server-version", false, "Require server version to match client version")
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cmds.PersistentFlags().String("api-version", latest.Version, "The version of the API to use against the server (used for viewing resources only)")
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cmds.PersistentFlags().String("api-version", latest.Version, "The version of the API to use against the server")
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cmds.PersistentFlags().String("certificate-authority", "", "Path to a certificate file for the certificate authority")
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cmds.PersistentFlags().String("client-certificate", "", "Path to a client certificate for TLS.")
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cmds.PersistentFlags().String("client-key", "", "Path to a client key file for TLS.")
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@ -17,6 +17,7 @@ limitations under the License.
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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/kubectl"
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@ -33,7 +34,8 @@ func (f *Factory) NewCmdGet(out io.Writer) *cobra.Command {
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Possible resources include pods (po), replication controllers (rc), services
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(se) or minions (mi).
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If you specify a Go template, you can use any field defined in pkg/api/types.go.
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If you specify a Go template, you can use any fields defined for the API version
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you are connecting to the server with.
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Examples:
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$ kubectl get pods
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@ -54,16 +56,27 @@ Examples:
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client, err := f.Client(cmd, mapping)
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checkErr(err)
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obj, err := kubectl.NewRESTHelper(client, mapping).Get(namespace, name, labels)
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checkErr(err)
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outputFormat := getFlagString(cmd, "output")
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templateFile := getFlagString(cmd, "template")
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defaultPrinter, err := f.Printer(cmd, mapping, getFlagBool(cmd, "no-headers"))
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checkErr(err)
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err = kubectl.Print(out, obj, outputFormat, templateFile, defaultPrinter)
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printer, versioned, err := kubectl.GetPrinter(outputFormat, templateFile, defaultPrinter)
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checkErr(err)
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obj, err := kubectl.NewRESTHelper(client, mapping).Get(namespace, name, labels)
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checkErr(err)
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if versioned {
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// TODO Add an --output-version lock which can ensure that regardless of the
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// server version, the client output stays the same.
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obj, err = mapping.ObjectConvertor.ConvertToVersion(obj, mapping.APIVersion)
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checkErr(err)
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}
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if err := printer.PrintObj(obj, out); err != nil {
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checkErr(fmt.Errorf("Unable to output the provided object: %v", err))
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}
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},
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}
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cmd.Flags().StringP("output", "o", "", "Output format: json|yaml|template|templatefile")
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@ -34,20 +34,10 @@ import (
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"gopkg.in/v1/yaml"
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)
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// Print outputs a runtime.Object to an io.Writer in the given format
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func Print(w io.Writer, obj runtime.Object, format string, templateFile string, defaultPrinter ResourcePrinter) error {
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printer, err := getPrinter(format, templateFile, defaultPrinter)
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if err != nil {
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return err
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}
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if err := printer.PrintObj(obj, w); err != nil {
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return fmt.Errorf("Failed to print: %v\nRaw received object:\n%#v", err, obj)
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}
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return nil
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}
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func getPrinter(format, templateFile string, defaultPrinter ResourcePrinter) (ResourcePrinter, error) {
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// GetPrinter returns a resource printer and a bool indicating whether the object must be
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// versioned for the given format.
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func GetPrinter(format, templateFile string, defaultPrinter ResourcePrinter) (ResourcePrinter, bool, error) {
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versioned := true
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var printer ResourcePrinter
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switch format {
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case "json":
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@ -57,11 +47,11 @@ func getPrinter(format, templateFile string, defaultPrinter ResourcePrinter) (Re
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case "template":
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var data []byte
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if len(templateFile) == 0 {
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return printer, fmt.Errorf("template format specified but no template given")
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return nil, false, fmt.Errorf("template format specified but no template given")
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}
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tmpl, err := template.New("output").Parse(templateFile)
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if err != nil {
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return printer, fmt.Errorf("Error parsing template %s, %v\n", string(data), err)
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return nil, false, fmt.Errorf("Error parsing template %s, %v\n", string(data), err)
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}
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printer = &TemplatePrinter{
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Template: tmpl,
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@ -72,27 +62,30 @@ func getPrinter(format, templateFile string, defaultPrinter ResourcePrinter) (Re
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var err error
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data, err = ioutil.ReadFile(templateFile)
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if err != nil {
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return printer, fmt.Errorf("Error reading template %s, %v\n", templateFile, err)
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return nil, false, fmt.Errorf("Error reading template %s, %v\n", templateFile, err)
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}
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} else {
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return printer, fmt.Errorf("templatefile format specified but no template file given")
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return nil, false, fmt.Errorf("templatefile format specified but no template file given")
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}
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tmpl, err := template.New("output").Parse(string(data))
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if err != nil {
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return printer, fmt.Errorf("Error parsing template %s, %v\n", string(data), err)
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return nil, false, fmt.Errorf("Error parsing template %s, %v\n", string(data), err)
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}
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printer = &TemplatePrinter{
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Template: tmpl,
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}
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default:
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case "":
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printer = defaultPrinter
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versioned = false
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default:
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return nil, false, fmt.Errorf("output format %q not recognized", format)
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}
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return printer, nil
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return printer, versioned, nil
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}
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// ResourcePrinter is an interface that knows how to print API resources.
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type ResourcePrinter interface {
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// Print receives an arbitrary JSON body, formats it and prints it to a writer.
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// Print receives an arbitrary object, formats it and prints it to a writer.
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PrintObj(runtime.Object, io.Writer) error
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}
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@ -54,9 +54,14 @@ func TestJSONPrinter(t *testing.T) {
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func TestPrintJSON(t *testing.T) {
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buf := bytes.NewBuffer([]byte{})
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if err := Print(buf, &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, "json", "", nil); err != nil {
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printer, versioned, err := GetPrinter("json", "", nil)
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if err != nil {
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t.Errorf("unexpected error: %#v", err)
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}
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if !versioned {
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t.Errorf("printer should be versioned")
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}
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printer.PrintObj(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, buf)
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obj := map[string]interface{}{}
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if err := json.Unmarshal(buf.Bytes(), &obj); err != nil {
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t.Errorf("unexpected error: %#v\n%s", err, buf.String())
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@ -65,9 +70,14 @@ func TestPrintJSON(t *testing.T) {
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func TestPrintYAML(t *testing.T) {
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buf := bytes.NewBuffer([]byte{})
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if err := Print(buf, &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, "yaml", "", nil); err != nil {
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printer, versioned, err := GetPrinter("yaml", "", nil)
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if err != nil {
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t.Errorf("unexpected error: %#v", err)
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}
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if !versioned {
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t.Errorf("printer should be versioned")
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}
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printer.PrintObj(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, buf)
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obj := map[string]interface{}{}
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if err := yaml.Unmarshal(buf.Bytes(), &obj); err != nil {
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t.Errorf("unexpected error: %#v\n%s", err, buf.String())
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@ -76,31 +86,33 @@ func TestPrintYAML(t *testing.T) {
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func TestPrintTemplate(t *testing.T) {
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buf := bytes.NewBuffer([]byte{})
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if err := Print(buf, &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, "template", "{{ .Name }}", nil); err != nil {
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printer, versioned, err := GetPrinter("template", "{{ .Name }}", nil)
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if err != nil {
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t.Errorf("unexpected error: %#v", err)
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}
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if !versioned {
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t.Errorf("printer should be versioned")
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}
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printer.PrintObj(&api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, buf)
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if buf.String() != "foo" {
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t.Errorf("unexpected output: %s", buf.String())
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}
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}
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func TestPrintEmptyTemplate(t *testing.T) {
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buf := bytes.NewBuffer([]byte{})
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if err := Print(buf, &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, "template", "", nil); err == nil {
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if _, _, err := GetPrinter("template", "", nil); err == nil {
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t.Errorf("unexpected non-error")
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}
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}
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func TestPrintBadTemplate(t *testing.T) {
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buf := bytes.NewBuffer([]byte{})
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if err := Print(buf, &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, "template", "{{ .Name", nil); err == nil {
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if _, _, err := GetPrinter("template", "{{ .Name", nil); err == nil {
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t.Errorf("unexpected non-error")
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}
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}
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func TestPrintBadTemplateFile(t *testing.T) {
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buf := bytes.NewBuffer([]byte{})
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if err := Print(buf, &api.Pod{ObjectMeta: api.ObjectMeta{Name: "foo"}}, "templatefile", "", nil); err == nil {
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if _, _, err := GetPrinter("templatefile", "", nil); err == nil {
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t.Errorf("unexpected non-error")
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}
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}
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