cmd/client: split commands in multiple files

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

cmd/client/system.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/urfave/cli"
+	"golang.org/x/net/context"
+	pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+var runtimeVersionCommand = cli.Command{
+	Name:  "runtimeversion",
+	Usage: "get runtime version information",
+	Action: func(context *cli.Context) error {
+		// Set up a connection to the server.
+		conn, err := getClientConnection(context)
+		if err != nil {
+			return fmt.Errorf("failed to connect: %v", err)
+		}
+		defer conn.Close()
+		client := pb.NewRuntimeServiceClient(conn)
+
+		// Test RuntimeServiceClient.Version
+		version := "v1alpha1"
+		err = Version(client, version)
+		if err != nil {
+			return fmt.Errorf("Getting the runtime version failed: %v", err)
+		}
+		return nil
+	},
+}
+
+// Version sends a VersionRequest to the server, and parses the returned VersionResponse.
+func Version(client pb.RuntimeServiceClient, version string) error {
+	r, err := client.Version(context.Background(), &pb.VersionRequest{Version: &version})
+	if err != nil {
+		return err
+	}
+	fmt.Printf("VersionResponse: Version: %s, RuntimeName: %s, RuntimeVersion: %s, RuntimeApiVersion: %s\n", *r.Version, *r.RuntimeName, *r.RuntimeVersion, *r.RuntimeApiVersion)
+	return nil
+}