code: func NewApp(gitCommit, usage string) *cli.App {
  	app := cli.NewApp()
  	app.Name = filepath.Base(os.Args[0])
  	app.Author = ""
  	//app.Authors = nil
  	app.Email = ""
  	app.Version = params.VersionWithMeta
  	if len(gitCommit) >= 8 {
  		app.Version += "-" + gitCommit[:8]
  	}
  	app.Usage = usage
  	return app
  }
docs: // NewApp creates an app with sane defaults.