cmd/client: split commands in multiple files

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

cmd/client/image.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/urfave/cli"
+	"golang.org/x/net/context"
+	pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
+)
+
+var imageCommand = cli.Command{
+	Name: "image",
+	Subcommands: []cli.Command{
+		pullImageCommand,
+	},
+}
+
+var pullImageCommand = cli.Command{
+	Name:  "pull",
+	Usage: "pull an image",
+	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.NewImageServiceClient(conn)
+
+		_, err = PullImage(client, context.Args().Get(0))
+		if err != nil {
+			return fmt.Errorf("pulling image failed: %v", err)
+		}
+		return nil
+	},
+}
+
+// PullImage sends a PullImageRequest to the server, and parses
+// the returned ContainerStatusResponse.
+func PullImage(client pb.ImageServiceClient, image string) (*pb.PullImageResponse, error) {
+	return client.PullImage(context.Background(), &pb.PullImageRequest{Image: &pb.ImageSpec{Image: &image}})
+}