let kubectl api-versions use the discovery client

docs/man/man1/kubectl-api-versions.1

@@ -3,7 +3,7 @@
 
 .SH NAME
 .PP
-kubectl api\-versions \- Print available API versions.
+kubectl api\-versions \- Print the supported API versions on the server, in the form of "group/version".
 
 
 .SH SYNOPSIS
@@ -13,7 +13,7 @@ kubectl api\-versions \- Print available API versions.
 
 .SH DESCRIPTION
 .PP
-Print available API versions.
+Print the supported API versions on the server, in the form of "group/version".
 
 
 .SH OPTIONS INHERITED FROM PARENT COMMANDS

docs/user-guide/kubectl/kubectl.md

@@ -77,7 +77,7 @@ kubectl
 ### SEE ALSO
 
 * [kubectl annotate](kubectl_annotate.md)	 - Update the annotations on a resource
-* [kubectl api-versions](kubectl_api-versions.md)	 - Print available API versions.
+* [kubectl api-versions](kubectl_api-versions.md)	 - Print the supported API versions on the server, in the form of "group/version".
 * [kubectl apply](kubectl_apply.md)	 - Apply a configuration to a resource by filename or stdin
 * [kubectl attach](kubectl_attach.md)	 - Attach to a running container.
 * [kubectl autoscale](kubectl_autoscale.md)	 - Auto-scale a replication controller
@@ -105,7 +105,7 @@ kubectl
 * [kubectl stop](kubectl_stop.md)	 - Deprecated: Gracefully shut down a resource by name or filename.
 * [kubectl version](kubectl_version.md)	 - Print the client and server version information.
 
-###### Auto generated by spf13/cobra on 16-Oct-2015
+###### Auto generated by spf13/cobra on 21-Oct-2015
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/user-guide/kubectl/kubectl.md?pixel)]()

docs/user-guide/kubectl/kubectl_api-versions.md

@@ -33,12 +33,12 @@ Documentation for other releases can be found at
 
 ## kubectl api-versions
 
-Print available API versions.
+Print the supported API versions on the server, in the form of "group/version".
 
 ### Synopsis
 
 
-Print available API versions.
+Print the supported API versions on the server, in the form of "group/version".
 
 ```
 kubectl api-versions
@@ -76,7 +76,7 @@ kubectl api-versions
 
 * [kubectl](kubectl.md)	 - kubectl controls the Kubernetes cluster manager
 
-###### Auto generated by spf13/cobra at 2015-09-22 12:53:42.294634813 +0000 UTC
+###### Auto generated by spf13/cobra on 20-Oct-2015
 
 <!-- BEGIN MUNGE: GENERATED_ANALYTICS -->
 [![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/docs/user-guide/kubectl/kubectl_api-versions.md?pixel)]()

pkg/client/unversioned/client.go

@@ -196,7 +196,7 @@ func (c *Client) SwaggerSchema(groupVersion string) (*swagger.ApiDeclaration, er
 	if err != nil {
 		return nil, err
 	}
-	groupVersions := extractGroupVersions(groupList)
+	groupVersions := ExtractGroupVersions(groupList)
 	// This check also takes care the case that kubectl is newer than the running endpoint
 	if stringDoesntExistIn(groupVersion, groupVersions) {
 		return nil, fmt.Errorf("API version: %s is not supported by the server. Use one of: %v", groupVersion, groupVersions)

pkg/client/unversioned/discovery_client.go

@@ -140,7 +140,7 @@ func (d *DiscoveryClient) ServerResources() (map[string]*unversioned.APIResource
 	if err != nil {
 		return nil, err
 	}
-	groupVersions := extractGroupVersions(apiGroups)
+	groupVersions := ExtractGroupVersions(apiGroups)
 	result := map[string]*unversioned.APIResourceList{}
 	for _, groupVersion := range groupVersions {
 		resources, err := d.ServerResourcesForGroupVersion(groupVersion)

pkg/client/unversioned/helper.go

@@ -187,7 +187,7 @@ func MatchesServerVersion(client *Client, c *Config) error {
 	return nil
 }
 
-func extractGroupVersions(l *unversioned.APIGroupList) []string {
+func ExtractGroupVersions(l *unversioned.APIGroupList) []string {
 	var groupVersions []string
 	for _, g := range l.Groups {
 		for _, gv := range g.Versions {
@@ -241,7 +241,7 @@ func ServerAPIVersions(c *Config) (groupVersions []string, err error) {
 	if err != nil {
 		return nil, fmt.Errorf("unexpected error: %v", err)
 	}
-	groupVersions = append(groupVersions, extractGroupVersions(&apiGroupList)...)
+	groupVersions = append(groupVersions, ExtractGroupVersions(&apiGroupList)...)
 
 	return groupVersions, nil
 }

pkg/kubectl/cmd/apiversions.go

@@ -20,10 +20,11 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"sort"
 
 	"github.com/spf13/cobra"
 
-	"k8s.io/kubernetes/pkg/api/unversioned"
+	unversioned_client "k8s.io/kubernetes/pkg/client/unversioned"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 )
 
@@ -32,7 +33,7 @@ func NewCmdApiVersions(f *cmdutil.Factory, out io.Writer) *cobra.Command {
 		Use: "api-versions",
 		// apiversions is deprecated.
 		Aliases: []string{"apiversions"},
-		Short:   "Print available API versions.",
+		Short:   "Print the supported API versions on the server, in the form of \"group/version\".",
 		Run: func(cmd *cobra.Command, args []string) {
 			err := RunApiVersions(f, out)
 			cmdutil.CheckErr(err)
@@ -51,19 +52,14 @@ func RunApiVersions(f *cmdutil.Factory, w io.Writer) error {
 		return err
 	}
 
-	apiVersions, err := client.ServerAPIVersions()
+	groupList, err := client.Discovery().ServerGroups()
 	if err != nil {
-		fmt.Printf("Couldn't get available api versions from server: %v\n", err)
-		os.Exit(1)
+		return fmt.Errorf("Couldn't get available api versions from server: %v\n", err)
 	}
-
-	var expAPIVersions *unversioned.APIVersions
-	expAPIVersions, err = client.Extensions().ServerAPIVersions()
-
-	fmt.Fprintf(w, "Available Server Api Versions: %#v\n", *apiVersions)
-	if err == nil {
-		fmt.Fprintf(w, "Available Server Experimental Api Versions: %#v\n", *expAPIVersions)
+	apiVersions := unversioned_client.ExtractGroupVersions(groupList)
+	sort.Strings(apiVersions)
+	for _, v := range apiVersions {
+		fmt.Fprintln(w, v)
 	}
-
 	return nil
 }

test/e2e/kubectl.go

@@ -427,9 +427,6 @@ var _ = Describe("Kubectl client", func() {
 		It("should check if v1 is in available api versions [Conformance]", func() {
 			By("validating api verions")
 			output := runKubectl("api-versions")
-			if !strings.Contains(output, "Available Server Api Versions:") {
-				Failf("Missing caption in kubectl api-versions")
-			}
 			if !strings.Contains(output, "v1") {
 				Failf("No v1 in kubectl api-versions")
 			}