nodejs copy file

copy.js

'use scrict';

var fs = require('fs');
var stat = fs.stat;

function copy(src, dest){
	fs.readdir(src, function(err, paths) {
		if (err) {
			console.log(err);
			throw err;
		} else {
			paths.forEach(function(path) {
				var _src = src + '/' + path;
				var _dest = dest + '/' + path;
				
				stat(_src, function(err, st) {
					if (err) {
						throw err;
					}
					if (st.isFile()) {
						var readStream = fs.createReadStream(_src);
						var writestream = fs.createWriteStream(_dest);
						readStream.pipe(writestream);
					} else if (st.isDirectory) {
						doWithExists(_src, _dest, copy);
					}
				});
			});
		}
	});
}

function doWithExists(src, dest, callback) {
	fs.exists(dest, function(exists) {
		if (exists) {
			callback(src, dest);
		} else {
			fs.mkdir(dest, function() {
				callback(src, dest);
			});
		}
	});
}