Version 1.0 broken when setup.py installed

[flacjacket]

In qtile, we use cairocffi, and the tests have started to fail with

libqtile/drawer.py:33: in <module>
    import cairocffi
.tox/py36/lib/python3.6/site-packages/cairocffi/__init__.py:17: in <module>
    from ._generated.ffi import ffi
E   ModuleNotFoundError: No module named 'cairocffi._generated.ffi'

The _generated folder that is built does not have a __init__.py generated in it, so I'm not sure how this is importable. Looking at it on my own machine, I get:

In [1]: import cairocffi

In [2]: cairocffi._generated
Out[2]: <module 'cairocffi._generated' (namespace)>

so the _generated is not a module.

[liZe]

The _generated folder that is built does not have a __init__.py generated in it, so I'm not sure how this is importable.

__init.py__ files are not mandatory since Python 3.3, so it shouldn't be a problem with 3.6. Is your cairocffi module installed with pip?

[flacjacket]

It is installed in our tests via pip (see the our tox.ini), but we wind up with problems importing the module. See:
https://travis-ci.org/qtile/qtile/jobs/490956510

[liZe]

I've found where the problem comes from. You import cairocffi.ffi_build in libqtile/pango_ffi_build.py (called by scripts/ffibuild in tox.ini). Importing this module deletes the generated ffi modules.

You shouldn't import this module that's not part of the public API. But importing this module shouldn't delete the generated modules 😄. I'll try to find a solution for that.

[liZe]

@flacjacket It works now (at least for me).

Note for later: We won't distribute wheels anymore. As we need to compile ffi modules during the installation, it doesn't really make sense.

[flacjacket]

Ah, thanks for the fix! We do rely on importing cairocffi.ffi_build to be able to build our pangocairo bindings, so I'm glad you could figure it out