Cibuildwheel: Python 3.6 on macOS have some SSL problems

[hroncok]

When using setup_requires, the 3.6 version of Python on macOS will blow up.

See actual Travis CI log from https://github.com/joerick/cibuildwheel-autopypi-example/pull/4

This can be workarounded by manually pip installing the requirement in CIBW_BEFORE_BUILD. But given it only blows up with 3.6, I think it's a problem with Python installation.

[joerick]

might be solved with pip install certifi?

[joerick]

Any update on this @hroncok? Did you get it working using another method?

[hroncok]

Sorry, I have it on my TODO, but new semester have just started here and
everything is a bit crazy. I can get back to this in couple of weeks.

Dne 9. 10. 2017 20:29 napsal uživatel "Joe Rickerby" <
[email protected]>:

Any update on this @hroncok https://github.com/hroncok? Did you get it
working using another method?

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[tgarc]

I've seen this issue too. To the best of my recollection, it was an issue with the fact that any packages from setup_requires are installed in some hackish way that doesn't always work nicely. I ran into a similar issue where installing cffi with setup_requires raised an error because it couldn't find the installed ffi library; again I had to use the pip install workaround.

I would defer this issue to the pip guys...this definitely isn't an issue particular to cibuildwheel.

[hroncok]

A note: setup_requires don't use wheels, pip installing the dependencies before is a good optimization (especially when requiring stuff like Cython or Numpy). How this works inside is a mystery for me. Maybe the root of this issue is in setuptools.

[joerick]

Thanks for the report @hroncok. The more I learn about setup_requires, the more I'm sure it shouldn't be used. Packages installed though it are installed in some arcane setuptools way that isn't well supported in a post-pip world.

In summary - don't use setup_requires. If you must use it, preinstall those dependencies using CIBW_BEFORE_BUILD="pip install x y z".

[hroncok]

That's basically what I have learned as well.