Execute JavaScript (HTML) file by ant and redirect output to file

How to execute JavaScript file by ant and redirect stdout and stderr to files?

For example let say we have

helloWorld.js

console.log('Hello world!');  

I need ant target to p开发者_StackOverflow中文版roudce

stdout.txt

Hello world!

It is acceptable to create temporary HTML file that include needed JavaScript file and then execute tmp.html, but I would like to omit this step if possible.

You can use Rhino to execute Javascript from ant. See this question or any of these questions for examples.

Node.js would help with this. No HTML necessary.