First cut of program

label1.go

package main

import (
        "flag"
        "fmt"
        "os"
        "path/filepath"
)

func main() {
        flag.Usage = func() {
                fmt.Fprintf(os.Stderr, "Usage: %s <path-to-image>\n", filepath.Base(os.Args[0]))
        }

        flag.Parse()

        args := flag.Args()
        if len(args) == 0 {
                flag.Usage()
                os.Exit(1)
        }
}