Subcommand Dispatch

Many command-line tools choose a small action by looking at a subcommand word.

subcommand_dispatch.go

package main

import "fmt"

func dispatch(command string) string {
	handlers := map[string]string{
		"init":   "create config",
		"status": "show status",
		"sync":   "sync changes",
	}

	action, ok := handlers[command]
	if !ok {
		return "show help"
	}
	return action
}

func main() {
	var command = 
	action := dispatch(command)

	fmt.Println("command=", command)
	fmt.Println("action=", action)
	fmt.Println("known=", action != "show help")
}

package main

import "fmt"

func dispatch(command string) string {
	handlers := map[string]string{
		"init":   "create config",
		"status": "show status",
		"sync":   "sync changes",
	}

	action, ok := handlers[command]
	if !ok {
		return "show help"
	}
	return action
}

func main() {
	var command = 
	action := dispatch(command)

	fmt.Println("command=", command)
	fmt.Println("action=", action)
	fmt.Println("known=", action != "show help")
}

package main

import "fmt"

func dispatch(command string) string {
	handlers := map[string]string{
		"init":   "create config",
		"status": "show status",
		"sync":   "sync changes",
	}

	action, ok := handlers[command]
	if !ok {
		return "show help"
	}
	return action
}

func main() {
	var command = 
	action := dispatch(command)

	fmt.Println("command=", command)
	fmt.Println("action=", action)
	fmt.Println("known=", action != "show help")
}

subcommand A subcommand is a word after the program name that selects a mode of work.