package main

import (
	"fmt"
	"os"
)

const version = "1.0.0"

func main() {
	if len(os.Args) < 2 {
		printUsage()
		return
	}
	if os.Args[1] != "version" {
		fmt.Fprintf(os.Stderr, "unknown command: %s\n", os.Args[1])
		printUsage()
		os.Exit(1)
	}
	fmt.Println("sample-cli", version)
}

func printUsage() {
	fmt.Println("usage: sample-cli <version>")
}