This program lists files in a non-deterministic order on windows (node v0.8.22 and v0.10.0) On linux on v0.8.22 the files are listed arbitrarily but consistently between runs On linux with v0.10.0 the entries in a directory are listed alphabetically Invoke with: node ls-tree /path/to/tree/to/crawl

ls-tree.js

// this program lists files in a non-deterministic order on windows (node v0.8.22 and v0.10.0)
// on linux on v0.8.22 the files are listed arbitrarily but consistently between runs 
// on linux with v0.10.0 the entries in a directory are listed alphabetically

// invoke with:
// node ls-tree /path/to/tree/to/crawl

var events = require('events');
var path = require('path');
var Stream = require('stream');
var fs = require('fs');

function createDirectoryStream (dir) {
    var s = new Stream;
    s.readable = true;

  fs.readdir(dir, function (err, files) {
		if (err) {
			s.emit('error', err);
			return;	
		} 

		files.forEach(function (file) {
			s.emit('data', path.join(dir, file));
		});

		process.nextTick(function () {
			s.emit('end');
		});

	});

    return s;
}

function createRecursiveDirectoryStream (dir) {
	var s = new Stream,
	directoryStream = createDirectoryStream(dir),
	childStream,
	childDirs;
	s.readable = true;

	directoryStream.on('data', function (file) {
		fs.stat(file, function (err, stat) {
			if(err) {
				s.emit('error',err);
				return;
			} 

			s.emit('data', file);
			if (stat.isDirectory()) {
				childDirs++;
				childStream = createRecursiveDirectoryStream(file);

				childStream.on('data', function (file) {
					s.emit('data', file);
				});	

				childStream.on('end', function () {
					childDirs--;
					if(!childDirs) {
						s.emit('end');
					}
				});
			} 
		});
	});	

	return s;
}

function newLineStream() {
	var s = new Stream;
	s.readable = true;
	s.writeable = true;
	s.writable = true; // work around little bugette in v0.8.22

	s.write = function (data) {
		s.emit('data', data+'\n');	
		return true;
	}

	s.end = function (data) {
		s.emit('end');
	}

	s.destroy = function() {
		stream.emit("close");
	}

	s.emit("drain");
	return s;
}

createRecursiveDirectoryStream(process.argv[2])
 	.pipe(newLineStream()) // comment this out if you want
 	.pipe(process.stdout);