A featureless implementation of the UNIX ls utility using Node and Shelljs

ln.js

// module imports
var ln = require('shelljs').ln,
	test = require('shelljs').test,
	exit = require('shelljs').exit,
	path = require('path');


// command line argument parsing
var opts = require("nomnom")
	.option('symbolic', {
		abbr: 's',
		flag: true,
		help: 'create a symbolic link'
	})
	.option('force', {
		abbr: 'f',
		flag: true,
		help: 'force creation of the link'
	})
	.parse();


// sanity check: first argument should be an existing file
if (opts[0] === undefined || !test('-e', opts[0])) {
	console.error('source does not exist or was not given.');
	exit(1);
};

// variable declations
var args = "-", 
	source = opts[0], // first argument is always the source
	destination = opts[1] || "./" + path.basename(opts[0]); // take second argument OR 

// do we need to create a symbolic link?
if (opts.symbolic) {
	args += "s";
};

// do we need to create a link even if it already exists?
if (opts.force) {
	args += "f";
};

// do the link creation
if (args !== "-") {
	ln(args, source, destination);
} else {
	ln(source, destination);
}