Golang flag package code snippet

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import "flag"

func main() {
    // -t string
    var makeType = flag.String("t", "", "Type of generation [project|test]")

    // usage message
	flag.Usage = func() {
		fmt.Println("Usage:")
		flag.PrintDefaults()
	}

	flag.Parse()

    // 取得參數 value
	switch *makeType {
	case "project":
        // blah...
        break
    case "test":
        // blah...
        break
    default:
        flag.Usage()    // print usage
        break
    }
}