githubcomspf13cobra 软件的使用实例举5个代码实例。

创建一个简单的命令：

var rootCmd = &cobra.Command{
  Use:   "myapp",
  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.`,
  Run: func(cmd *cobra.Command, args []string) {
    // Do Stuff Here
  },
}

func main() {
  if err := rootCmd.Execute(); err != nil {
    fmt.Println(err)
    os.Exit(1)
  }
}

添加一个子命令：

var rootCmd = &cobra.Command{
  Use:   "myapp",
  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.`,
  Run: func(cmd *cobra.Command, args []string) {
    // Do Stuff Here
  },
}

var subCmd = &cobra.Command{
  Use:   "sub",
  Short: "A brief description of your subcommand",
  Long:  `A longer description that spans multiple lines and likely contains
examples and usage of using your subcommand.`,
  Run: func(cmd *cobra.Command, args []string) {
    // Do Subcommand Stuff Here
  },
}

func init() {
  rootCmd.AddCommand(subCmd)
}

func main() {
  if err := rootCmd.Execute(); err != nil {
    fmt.Println(err)
    os.Exit(1)
  }
}

添加一个标志：

var rootCmd = &cobra.Command{
  Use:   "myapp",
  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.`,
  Run: func(cmd *cobra.Command, args []string) {
    // Do Stuff Here
  },
}

var myFlag string

func init() {
  rootCmd.Flags().StringVar(&myFlag, "myflag", "default", "A brief description of my flag")
}

func main() {
  if err := rootCmd.Execute(); err != nil {
    fmt.Println(err)
    os.Exit(1)
  }
}

添加一个参数：

var rootCmd = &cobra.Command{
  Use:   "myapp",
  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.`,
  Args:  cobra.MinimumNArgs(1),
  Run: func(cmd *cobra.Command, args []string) {
    // Do Stuff Here
  },
}

func main() {
  if err := rootCmd.Execute(); err != nil {
    fmt.Println(err)
    os.Exit(1)
  }
}

添加一个可选参数：

var rootCmd = &cobra.Command{
  Use:   "myapp",
  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.`,
  Args:  cobra.MaximumNArgs(1),
  Run: func(cmd *cobra.Command, args []string) {
    // Do Stuff Here
  },
}

func main() {
  if err := rootCmd.Execute(); err != nil {
    fmt.Println(err)
    os.Exit(1)
  }
}
``