How I start writing every command line tool in Go

main.go

package main

import (
	"flag"
	"fmt"
	"os"
)

func main() {
	flag.Parse()
	if err := Main(); err != nil {
		fmt.Fprintln(os.Stderr, err.Error())
		os.Exit(1)
	}
}

func Main() error {

	return nil
}