package main import ( "fmt" "os" "github.com/smira/commander" ) func main() { cmd := &commander.Command{ UsageLine: "mycmd [OPTIONS] FILE", Short: "A brief description of mycmd", Long: ` A longer description of mycmd. This can span multiple lines and should provide more detail about what the command does and how it should be used. `, Run: func(cmd *commander.Command, args []string) error { fmt.Printf("Running mycmd with args: %v\n", args) return nil }, } cmd.Subcommands = []*commander.Command{ // Add subcommands here } if err := cmd.Dispatch(os.Args[1:]); err != nil { fmt.Fprintf(os.Stderr, "%s: %s\n", os.Args[0], err) os.Exit(1) } }This example defines a `mycmd` CLI tool with a single subcommand. The `UsageLine` field is a string that describes how the command should be used, while the `Short` and `Long` fields provide brief and detailed descriptions of the command, respectively. The `Run` field is a function that will be called when the command is executed. In this case, it simply prints the command line arguments and returns `nil`. The `Dispatch` method is called with the command line arguments (excluding the program name) and will execute the appropriate subcommand. If an error occurs, it will be printed to stderr and the program will exit with a non-zero status code.