Yep, that's it exactly. I'm assuming that `@machine.communicate.sudo` is correctly abstracted to the guest. vagrant-windows uses powershell, so I can just feed this stuff in.

One limitation of this initial version is that it's pretty white-space sensitive, and will only recognize exact line matches. It also doesn't account for changing ip addresses. It's a first iteration and could definitely get better. That said, it works. :-)