For portability with Windows it would be good if we could refactor this command to a pure Python implementation.

This function appears to have quite a bit of logic and will not be trivial to port to a pure Python implementation. It's also calling the Maven binary directly to perform the deploy rather than hitting the Rest API. This logic could likely be simplified by using the Nexus 2 Rest API instead so that we can use a pure "requests" library code rather than depending on an external binary.