$ ./cobra-demo A longer description that spans multiple lines and likely contains examples and usage of using your application. For example:
Cobra is a CLI library for Go that empowers applications. This application is a tool to generate the needed files to quickly create a Cobra application.
Usage: cobra-demo [command]
Available Commands: config A brief description of your command help Help about any command server A brief description of your command
Flags: --config string config file (default is $HOME/.cobra-demo.yaml) -h, --helphelpfor cobra-demo -t, --toggle Help message for toggle
Use "cobra-demo [command] --help"for more information about a command.
// rootCmd represents the base command when called without any subcommands var rootCmd = &cobra.Command{ Use: "cobra-demo", Short: "A brief description of your application", Long: `A longer description that spans multiple lines and likely contains examples and usage of using your application. For example: Cobra is a CLI library for Go that empowers applications. This application is a tool to generate the needed files to quickly create a Cobra application.`, // Uncomment the following line if your bare application // has an action associated with it: // Run: func(cmd *cobra.Command, args []string) { }, }
// Execute adds all child commands to the root command and sets flags appropriately. // This is called by main.main(). It only needs to happen once to the rootCmd. funcExecute() { if err := rootCmd.Execute(); err != nil { fmt.Println(err) os.Exit(1) } }
funcinit() { cobra.OnInitialize(initConfig)
// Here you will define your flags and configuration settings. // Cobra supports persistent flags, which, if defined here, // will be global for your application.
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra-demo.yaml)")
// Cobra also supports local flags, which will only run // when this action is called directly. rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle") }
// initConfig reads in config file and ENV variables if set. funcinitConfig() { if cfgFile != "" { // Use config file from the flag. viper.SetConfigFile(cfgFile) } else { // Find home directory. home, err := homedir.Dir() if err != nil { fmt.Println(err) os.Exit(1) }
// Search config in home directory with name ".cobra-demo" (without extension). viper.AddConfigPath(home) viper.SetConfigName(".cobra-demo") }
viper.AutomaticEnv() // read in environment variables that match
// If a config file is found, read it in. if err := viper.ReadInConfig(); err == nil { fmt.Println("Using config file:", viper.ConfigFileUsed()) } }
cobra add serve -a 'author name <email>' cobra add config -a 'author name <email>' cobra add create -p 'configCmd' -a 'author name <email>'# 在父命令config命令下创建子命令create,若没有指定-p,默认的父命令为rootCmd。
// configCmd represents the config command var configCmd = &cobra.Command{ Use: "config", Short: "A brief description of your command", Long: `A longer description that spans multiple lines and likely contains examples and usage of using your command. For example: Cobra is a CLI library for Go that empowers applications. This application is a tool to generate the needed files to quickly create a Cobra application.`, Run: func(cmd *cobra.Command, args []string) { fmt.Println("config called") }, }
funcinit() { rootCmd.AddCommand(configCmd)
// Here you will define your flags and configuration settings.
// Cobra supports Persistent Flags which will work for this command // and all subcommands, e.g.: // configCmd.PersistentFlags().String("foo", "", "A help for foo")
// Cobra supports local flags which will only run when this command // is called directly, e.g.: // configCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle") }
// createCmd represents the create command var createCmd = &cobra.Command{ Use: "create", Short: "A brief description of your command", Long: `A longer description that spans multiple lines and likely contains examples and usage of using your command. For example: Cobra is a CLI library for Go that empowers applications. This application is a tool to generate the needed files to quickly create a Cobra application.`, Run: func(cmd *cobra.Command, args []string) { fmt.Println("create called") }, }
funcinit() { configCmd.AddCommand(createCmd)
// Here you will define your flags and configuration settings.
// Cobra supports Persistent Flags which will work for this command // and all subcommands, e.g.: // createCmd.PersistentFlags().String("foo", "", "A help for foo")
// Cobra supports local flags which will only run when this command // is called directly, e.g.: // createCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle") }