rootCmd.PersistentFlags().VisitAll(func(flag *pflag.Flag) {
			if _, ok := helpFlags[flag.Name]; ok {
				// Currently every flag.Shorthand is "", so there is no point in showing shorthands
				shorthand := "   "
				if flag.Shorthand != "" {
					shorthand = "-" + flag.Shorthand + ","
				}
				c.Printf("  %s --%s: %s\n", shorthand, flag.Name, flag.Usage)
			}
		})
	})

	return retval

)

var (
	PodNamespace      = env.RegisterStringVar("SYSTEM_NAMESPACE", constants.IstioSystemNamespace, "pod's namespace").Get()
	PodName           = env.RegisterStringVar("POD_NAME", "", "").Get()
	NodeName          = env.RegisterStringVar("NODE_NAME", "", "").Get()
	Revision          = env.RegisterStringVar("REVISION", "", "").Get()