Add 'kpod pull' command

Signed-off-by: umohnani8 <umohnani@redhat.com>

cmd/kpod/main.go

@@ -4,6 +4,7 @@ import (
 	"os"
 
 	"github.com/Sirupsen/logrus"
+	"github.com/containers/storage/pkg/reexec"
 	"github.com/urfave/cli"
 )
 
@@ -11,6 +12,10 @@ import (
 const Version string = "0.0.1"
 
 func main() {
+	if reexec.Init() {
+		return
+	}
+
 	app := cli.NewApp()
 	app.Name = "kpod"
 	app.Usage = "manage pods and images"
@@ -20,6 +25,25 @@ func main() {
 		launchCommand,
 		tagCommand,
 		versionCommand,
+		pullCommand,
+	}
+	app.Flags = []cli.Flag{
+		cli.StringFlag{
+			Name:  "root",
+			Usage: "path to the root directory in which data, including images,  is stored",
+		},
+		cli.StringFlag{
+			Name:  "runroot",
+			Usage: "path to the 'run directory' where all state information is stored",
+		},
+		cli.StringFlag{
+			Name:  "storage-driver, s",
+			Usage: "select which storage driver is used to manage storage of images and containers (default is overlay2)",
+		},
+		cli.StringSliceFlag{
+			Name:  "storage-opt",
+			Usage: "used to pass an option to the storage driver",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {