Golang Command.SetOutput方法代码示例

func (n *notaryCommander) GetCommand() *cobra.Command {
	notaryCmd := cobra.Command{
		Use:           "notary",
		Short:         "Notary allows the creation of trusted collections.",
		Long:          "Notary allows the creation and management of collections of signed targets, allowing the signing and validation of arbitrary content.",
		SilenceUsage:  true, // we don't want to print out usage for EVERY error
		SilenceErrors: true, // we do our own error reporting with fatalf
		Run:           func(cmd *cobra.Command, args []string) { cmd.Usage() },
	}
	notaryCmd.SetOutput(os.Stdout)
	notaryCmd.AddCommand(&cobra.Command{
		Use:   "version",
		Short: "Print the version number of notary",
		Long:  `print the version number of notary`,
		Run: func(cmd *cobra.Command, args []string) {
			fmt.Printf("notary\n Version:    %s\n Git commit: %s\n", version.NotaryVersion, version.GitCommit)
		},
	})

	notaryCmd.PersistentFlags().StringVarP(
		&n.trustDir, "trustDir", "d", "", "Directory where the trust data is persisted to")
	notaryCmd.PersistentFlags().StringVarP(
		&n.configFile, "configFile", "c", "", "Path to the configuration file to use")
	notaryCmd.PersistentFlags().BoolVarP(&n.verbose, "verbose", "v", false, "Verbose output")
	notaryCmd.PersistentFlags().BoolVarP(&n.debug, "debug", "D", false, "Debug output")
	notaryCmd.PersistentFlags().StringVarP(&n.remoteTrustServer, "server", "s", "", "Remote trust server location")
	notaryCmd.PersistentFlags().StringVar(&n.tlsCAFile, "tlscacert", "", "Trust certs signed only by this CA")
	notaryCmd.PersistentFlags().StringVar(&n.tlsCertFile, "tlscert", "", "Path to TLS certificate file")
	notaryCmd.PersistentFlags().StringVar(&n.tlsKeyFile, "tlskey", "", "Path to TLS key file")

	cmdKeyGenerator := &keyCommander{
		configGetter: n.parseConfig,
		getRetriever: n.getRetriever,
	}

	cmdDelegationGenerator := &delegationCommander{
		configGetter: n.parseConfig,
		retriever:    n.getRetriever(),
	}

	cmdCertGenerator := &certCommander{
		configGetter: n.parseConfig,
		retriever:    n.getRetriever(),
	}

	cmdTufGenerator := &tufCommander{
		configGetter: n.parseConfig,
		retriever:    n.getRetriever(),
	}

	notaryCmd.AddCommand(cmdKeyGenerator.GetCommand())
	notaryCmd.AddCommand(cmdDelegationGenerator.GetCommand())
	notaryCmd.AddCommand(cmdCertGenerator.GetCommand())

	cmdTufGenerator.AddToCommand(&notaryCmd)

	return &notaryCmd
}

// ShowHelp shows the command help.
func (cli *DockerCli) ShowHelp(cmd *cobra.Command, args []string) error {
	cmd.SetOutput(cli.err)
	cmd.HelpFunc()(cmd, args)
	return nil
}

func noOpCmd() *cobra.Command {
	var c cobra.Command
	c.SetOutput(ioutil.Discard)
	return &c
}