Hi All, I am working on ticket #9217 / PR #1051 to add lots more wheel generation to the Twisted CI. I decided to give the cibuildwheel package a try and it made this process almost too easy (well... sort of :] ). I've got AppVeyor-Windows, Travis-Linux, and Circle-OSX all building a variety of wheels for the supported Python versions and bit depths. Travis doesn't save artifacts 'easily' so I went ahead and doubled up on Linux on Circle for now, though it's having some Docker issues at the moment and hasn't been successful yet. For some reason in this one case the project directory isn't getting mounted into the container as expected. wheel links: https://github.com/twisted/twisted/pull/1051#issuecomment-416743261 (and next comment) Now that I've got the wheel builds happening I figured it'd be good to try them out on 'real' machines. Turns out we get a failure on twisted.cred.test.test_strcred.SSHCheckerTests.test_isChecker for at least the two checks I've done so far (Windows and OSX). I haven't done more than a cursory look at that yet, but it's on the list to understand and resolve. More testing would of course be welcome. Real world, just trial Twisted's own tests, whatever would be appreciated if you are interested. failures with wheels: https://github.com/twisted/twisted/pull/1051#issuecomment-416977723 Overall, it's a bit unclear what the intended use of the various CI hosts are for Twisted. I hear that Travis OSX builds were really slow, but from what I can see Circle isn't doing any OSX (other than what I added). There wasn't any artifact storage being used on Circle either. So, I'm not sure if there was a reason to use Circle that went away, or... But, not having to hook Travis up to S3 or somesuch for storage is quite nice so Circle wins at least in that category. Now that I've got something rough in place, are there any opinions about how this should work? I don't know the present release workflow so I don't know if we'd want an automatic push to PyPI on tags (probably not), or just artifacts on the build server to grab manually (would need some S3 or such for Travis, or Circle for Linux builds as well). Anything else? Do we want automated tests against the wheels? cibuildwheel does have a feature for that though I haven't done anything with it yet. Anyways... hello, thanks for Twisted, and I hope this work ends up saving some people some time. Cheers, -kyle