classic-getopt/extras/example.js

Classic POSIX getopt(3).

"use strict";

const Getopt = require("../index");

function test(opt)
{
	let ch;

	while ((ch = opt.next()) !== -1) {
		switch (ch) {
		case 'a':
			console.log("-a");
			break;
		case 'b':
			console.log("-b %s", opt.optarg);
			break;
		default:
			console.log("usage: getopt [-a][-b string] ...");
			return;
		}
	}
	console.log("optind=%d", opt.optind);
	for (let argi = opt.optind; argi < opt.args.length; argi++)
		console.log("arg=%s", opt.args[argi]);
}

test(new Getopt(process.argv, "ab:"));
test(new Getopt(process.argv, ":ab:"));
test(new Getopt(process.argv, "ab:", false));