update wide option output

pkg/kubectl/cmd/cmd_test.go

@@ -389,7 +389,7 @@ func ExamplePrintReplicationControllerWithNamespace() {
 	// beep        foo       1         1         10y
 }
 
-func ExamplePrintReplicationControllerWithWide() {
+func ExamplePrintMultiContainersReplicationControllerWithWide() {
 	f, tf, codec := NewAPIFactory()
 	tf.Printer = kubectl.NewHumanReadablePrinter(false, false, true, false, false, false, []string{})
 	tf.Client = &fake.RESTClient{
@@ -416,6 +416,10 @@ func ExamplePrintReplicationControllerWithWide() {
 							Name:  "foo",
 							Image: "someimage",
 						},
+						{
+							Name:  "foo2",
+							Image: "someimage2",
+						},
 					},
 				},
 			},
@@ -429,8 +433,56 @@ func ExamplePrintReplicationControllerWithWide() {
 		fmt.Printf("Unexpected error: %v", err)
 	}
 	// Output:
-	// NAME      DESIRED   CURRENT   AGE       CONTAINER(S)   IMAGE(S)    SELECTOR
+	// NAME      DESIRED   CURRENT   AGE       CONTAINER(S)   IMAGE(S)               SELECTOR
-	// foo       1         1         10y       foo            someimage   foo=bar
+	// foo       1         1         10y       foo,foo2       someimage,someimage2   foo=bar
+}
+
+func ExamplePrintReplicationController() {
+	f, tf, codec := NewAPIFactory()
+	tf.Printer = kubectl.NewHumanReadablePrinter(false, false, false, false, false, false, []string{})
+	tf.Client = &fake.RESTClient{
+		Codec:  codec,
+		Client: nil,
+	}
+	cmd := NewCmdRun(f, os.Stdin, os.Stdout, os.Stderr)
+	ctrl := &api.ReplicationController{
+		ObjectMeta: api.ObjectMeta{
+			Name:              "foo",
+			Labels:            map[string]string{"foo": "bar"},
+			CreationTimestamp: unversioned.Time{Time: time.Now().AddDate(-10, 0, 0)},
+		},
+		Spec: api.ReplicationControllerSpec{
+			Replicas: 1,
+			Selector: map[string]string{"foo": "bar"},
+			Template: &api.PodTemplateSpec{
+				ObjectMeta: api.ObjectMeta{
+					Labels: map[string]string{"foo": "bar"},
+				},
+				Spec: api.PodSpec{
+					Containers: []api.Container{
+						{
+							Name:  "foo",
+							Image: "someimage",
+						},
+						{
+							Name:  "foo2",
+							Image: "someimage",
+						},
+					},
+				},
+			},
+		},
+		Status: api.ReplicationControllerStatus{
+			Replicas: 1,
+		},
+	}
+	err := f.PrintObject(cmd, ctrl, os.Stdout)
+	if err != nil {
+		fmt.Printf("Unexpected error: %v", err)
+	}
+	// Output:
+	// NAME      DESIRED   CURRENT   AGE
+	// foo       1         1         10y
 }
 
 func ExamplePrintPodWithWideFormat() {

pkg/kubectl/resource_printer.go

@@ -638,22 +638,19 @@ func printPodTemplate(pod *api.PodTemplate, w io.Writer, options PrintOptions) e
 	namespace := pod.Namespace
 
 	containers := pod.Template.Spec.Containers
-	var firstContainer api.Container
-	if len(containers) > 0 {
-		firstContainer, containers = containers[0], containers[1:]
-	}
 
 	if options.WithNamespace {
 		if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
 			return err
 		}
 	}
-	if _, err := fmt.Fprintf(w, "%s\t%s\t%s\t%s",
+	if _, err := fmt.Fprintf(w, "%s", name); err != nil {
-		name,
+		return err
-		firstContainer.Name,
+	}
-		firstContainer.Image,
+	if err := layoutContainers(containers, w); err != nil {
-		labels.FormatLabels(pod.Template.Labels),
+		return err
-	); err != nil {
+	}
+	if _, err := fmt.Fprintf(w, "\t%s", labels.FormatLabels(pod.Template.Labels)); err != nil {
 		return err
 	}
 	if _, err := fmt.Fprint(w, appendLabels(pod.Labels, options.ColumnLabels)); err != nil {
@@ -663,20 +660,6 @@ func printPodTemplate(pod *api.PodTemplate, w io.Writer, options PrintOptions) e
 		return err
 	}
 
-	// Lay out all the other containers on separate lines.
-	extraLinePrefix := "\t"
-	if options.WithNamespace {
-		extraLinePrefix = "\t\t"
-	}
-	for _, container := range containers {
-		_, err := fmt.Fprintf(w, "%s%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "")
-		if err != nil {
-			return err
-		}
-		if _, err := fmt.Fprint(w, appendLabelTabs(options.ColumnLabels)); err != nil {
-			return err
-		}
-	}
 	return nil
 }
 
@@ -689,14 +672,11 @@ func printPodTemplateList(podList *api.PodTemplateList, w io.Writer, options Pri
 	return nil
 }
 
+// TODO(AdoHe): try to put wide output in a single method
 func printReplicationController(controller *api.ReplicationController, w io.Writer, options PrintOptions) error {
 	name := controller.Name
 	namespace := controller.Namespace
 	containers := controller.Spec.Template.Spec.Containers
-	var firstContainer api.Container
-	if len(containers) > 0 {
-		firstContainer, containers = containers[0], containers[1:]
-	}
 
 	if options.WithNamespace {
 		if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
@@ -714,12 +694,12 @@ func printReplicationController(controller *api.ReplicationController, w io.Writ
 	); err != nil {
 		return err
 	}
+
 	if options.Wide {
-		if _, err := fmt.Fprintf(w, "\t%s\t%s\t%s",
+		if err := layoutContainers(containers, w); err != nil {
-			firstContainer.Name,
+			return err
-			firstContainer.Image,
+		}
-			labels.FormatLabels(controller.Spec.Selector),
+		if _, err := fmt.Fprintf(w, "\t%s", labels.FormatLabels(controller.Spec.Selector)); err != nil {
-		); err != nil {
 			return err
 		}
 	}
@@ -730,20 +710,6 @@ func printReplicationController(controller *api.ReplicationController, w io.Writ
 		return err
 	}
 
-	// Lay out all the other containers on separate lines.
-	extraLinePrefix := "\t"
-	if options.WithNamespace {
-		extraLinePrefix = "\t\t"
-	}
-	for _, container := range containers {
-		_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
-		if err != nil {
-			return err
-		}
-		if _, err := fmt.Fprint(w, appendLabelTabs(options.ColumnLabels)); err != nil {
-			return err
-		}
-	}
 	return nil
 }
 
@@ -760,10 +726,6 @@ func printReplicaSet(rs *extensions.ReplicaSet, w io.Writer, options PrintOption
 	name := rs.Name
 	namespace := rs.Namespace
 	containers := rs.Spec.Template.Spec.Containers
-	var firstContainer api.Container
-	if len(containers) > 0 {
-		firstContainer, containers = containers[0], containers[1:]
-	}
 
 	if options.WithNamespace {
 		if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
@@ -782,11 +744,10 @@ func printReplicaSet(rs *extensions.ReplicaSet, w io.Writer, options PrintOption
 		return err
 	}
 	if options.Wide {
-		if _, err := fmt.Fprintf(w, "\t%s\t%s\t%s",
+		if err := layoutContainers(containers, w); err != nil {
-			firstContainer.Name,
+			return err
-			firstContainer.Image,
+		}
-			unversioned.FormatLabelSelector(rs.Spec.Selector),
+		if _, err := fmt.Fprintf(w, "\t%s", unversioned.FormatLabelSelector(rs.Spec.Selector)); err != nil {
-		); err != nil {
 			return err
 		}
 	}
@@ -797,20 +758,6 @@ func printReplicaSet(rs *extensions.ReplicaSet, w io.Writer, options PrintOption
 		return err
 	}
 
-	// Lay out all the other containers on separate lines.
-	extraLinePrefix := "\t"
-	if options.WithNamespace {
-		extraLinePrefix = "\t\t"
-	}
-	for _, container := range containers {
-		_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
-		if err != nil {
-			return err
-		}
-		if _, err := fmt.Fprint(w, appendLabelTabs(options.ColumnLabels)); err != nil {
-			return err
-		}
-	}
 	return nil
 }
 
@@ -827,17 +774,18 @@ func printJob(job *extensions.Job, w io.Writer, options PrintOptions) error {
 	name := job.Name
 	namespace := job.Namespace
 	containers := job.Spec.Template.Spec.Containers
-	var firstContainer api.Container
+
-	if len(containers) > 0 {
-		firstContainer, containers = containers[0], containers[1:]
-	}
 	if options.WithNamespace {
 		if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
 			return err
 		}
 	}
 
-	selector, _ := unversioned.LabelSelectorAsSelector(job.Spec.Selector)
+	selector, err := unversioned.LabelSelectorAsSelector(job.Spec.Selector)
+	if err != nil {
+		// this shouldn't happen if LabelSelector passed validation
+		return err
+	}
 	if job.Spec.Completions != nil {
 		if _, err := fmt.Fprintf(w, "%s\t%d\t%d\t%s",
 			name,
@@ -858,11 +806,10 @@ func printJob(job *extensions.Job, w io.Writer, options PrintOptions) error {
 		}
 	}
 	if options.Wide {
-		if _, err := fmt.Fprintf(w, "\t%s\t%s\t%s",
+		if err := layoutContainers(containers, w); err != nil {
-			firstContainer.Name,
+			return err
-			firstContainer.Image,
+		}
-			selector.String(),
+		if _, err := fmt.Fprintf(w, "\t%s", selector.String()); err != nil {
-		); err != nil {
 			return err
 		}
 	}
@@ -873,20 +820,6 @@ func printJob(job *extensions.Job, w io.Writer, options PrintOptions) error {
 		return err
 	}
 
-	// Lay out all the other containers on separate lines.
-	extraLinePrefix := "\t"
-	if options.WithNamespace {
-		extraLinePrefix = "\t\t"
-	}
-	for _, container := range containers {
-		_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
-		if err != nil {
-			return err
-		}
-		if _, err := fmt.Fprint(w, appendLabelTabs(options.ColumnLabels)); err != nil {
-			return err
-		}
-	}
 	return nil
 }
 
@@ -1021,7 +954,8 @@ func printIngress(ingress *extensions.Ingress, w io.Writer, options PrintOptions
 		return err
 	}
 
-	// Lay out all the rules on separate lines.
+	// Lay out all the rules on separate lines if use wide output.
+	// TODO(AdoHe): improve ingress output
 	extraLinePrefix := ""
 	if options.WithNamespace {
 		extraLinePrefix = "\t"
@@ -1047,6 +981,7 @@ func printIngress(ingress *extensions.Ingress, w io.Writer, options PrintOptions
 			}
 		}
 	}
+
 	return nil
 }
 
@@ -1064,10 +999,6 @@ func printDaemonSet(ds *extensions.DaemonSet, w io.Writer, options PrintOptions)
 	namespace := ds.Namespace
 
 	containers := ds.Spec.Template.Spec.Containers
-	var firstContainer api.Container
-	if len(containers) > 0 {
-		firstContainer, containers = containers[0], containers[1:]
-	}
 
 	if options.WithNamespace {
 		if _, err := fmt.Fprintf(w, "%s\t", namespace); err != nil {
@@ -1092,11 +1023,10 @@ func printDaemonSet(ds *extensions.DaemonSet, w io.Writer, options PrintOptions)
 		return err
 	}
 	if options.Wide {
-		if _, err := fmt.Fprintf(w, "\t%s\t%s\t%s",
+		if err := layoutContainers(containers, w); err != nil {
-			firstContainer.Name,
+			return err
-			firstContainer.Image,
+		}
-			selector,
+		if _, err := fmt.Fprintf(w, "\t%s", selector.String()); err != nil {
-		); err != nil {
 			return err
 		}
 	}
@@ -1107,20 +1037,6 @@ func printDaemonSet(ds *extensions.DaemonSet, w io.Writer, options PrintOptions)
 		return err
 	}
 
-	// Lay out all the other containers on separate lines.
-	extraLinePrefix := "\t"
-	if options.WithNamespace {
-		extraLinePrefix = "\t\t"
-	}
-	for _, container := range containers {
-		_, err := fmt.Fprintf(w, "%s%s\t%s\t%s\t%s", extraLinePrefix, container.Name, container.Image, "", "")
-		if err != nil {
-			return err
-		}
-		if _, err := fmt.Fprint(w, appendLabelTabs(options.ColumnLabels)); err != nil {
-			return err
-		}
-	}
 	return nil
 }
 
@@ -1729,6 +1645,26 @@ func appendLabelTabs(columnLabels []string) string {
 	return buffer.String()
 }
 
+// Lay out all the containers on one line if use wide output.
+func layoutContainers(containers []api.Container, w io.Writer) error {
+	var namesBuffer bytes.Buffer
+	var imagesBuffer bytes.Buffer
+
+	for i, container := range containers {
+		namesBuffer.WriteString(container.Name)
+		imagesBuffer.WriteString(container.Image)
+		if i != len(containers)-1 {
+			namesBuffer.WriteString(",")
+			imagesBuffer.WriteString(",")
+		}
+	}
+	_, err := fmt.Fprintf(w, "\t%s\t%s", namesBuffer.String(), imagesBuffer.String())
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 func formatLabelHeaders(columnLabels []string) []string {
 	formHead := make([]string, len(columnLabels))
 	for i, l := range columnLabels {