copytree.js

var fs = require('fs');
var path = require('path');
var sys = require('sys');

function copytree(src, dst) {
	if(!path.existsSync(src)) {
		throw new Error(src + ' does not exists. Nothing to be copied');
	}
	
	if(!fs.statSync(src).isDirectory()) {
		throw new Error(src + ' must be a directory');
	}

	var filenames = fs.readdirSync(src);
	var basedir = src;
	
	if(!path.existsSync(dst)) {
		fs.mkdirSync(dst, 0755);
	}
	
	for(name in filenames) {
		var file = basedir + '/' + filenames[name];
		var newdst = dst + '/' + filenames[name];
		
		if(fs.statSync(file).isDirectory()) {
			copytree(file, newdst);
		} else {
			/*fs.readFile(file, function(err, buf) {
				if(err) {
					throw err;
				}
				fs.writeFile(newdst, buf);
			});*/

			var reader = fs.createReadStream(file);
			var writer = fs.createWriteStream(newdst);
			sys.pump(reader, writer);	
		}
	}	
}