We should use the unasync package (and unasync should check for stale files in output dir)

[johtso]

unasync.py --check will currently happily allow stale files in _sync. It would be simple enough to make the tool treat the destination directory as fully managed and make sure it strictly matches the output of unasyncing _async with no extra files.

At the same time it would probably be good to improve / start using the unasync package so that effort isn't getting repeated.

See:
python-trio/unasync#66
python-trio/unasync#68
python-trio/unasync#69

[pquentin]

We would be happy to collaborate here! @johtso If you get one pull request merged in the python-trio org, you'll be invited as a collaborator to approve pull requests, and we'd be happy to allow you making releases too.

[johtso]

@pquentin hope to have a bit of time to do more than just open issues soon :)

[tomchristie]

I'm going to close this one off for now. No pressing motivation for us to do this given our current workflow.
Am not neccessarily against considering any pull requests switching to unasync.py, but otherwise I don't see any clear need to treat this as an open issue.