'exclude' packages option in files section of setup.cfg

See also: "ENH: also exclude files from bdist and bdist_wheel packages" https://bugs.launchpad.net/pbr/+bug/1607057

Docs:
- https://docs.python.org/3/distutils/sourcedist.html#specifying-the-files-to-distribute
- https://docs.python.org/3/distutils/builtdist.html
- http://setuptools.readthedocs.io/en/latest/setuptools.html#using-find-packages

Thank you for your reply!

But, I want to exclude the test files when executing 'python setup.py install'
or 'pip install .' command.

The documents you pointed explain the procedures when creating a source
distribution package, I think.

And, as you said, by using 'setuptools.find_packages' in setup.py without pbr,
I could exclude the test files, but I couldn't with pbr enabled.

The following seems to find packages to install and does not provide 'exclude'
options.
 http://git.openstack.org/cgit/openstack-dev/pbr/tree/pbr/find_package.py#n21

We must be able to exclude packages. exclude in find_packages is very standard, we need to support this option.

Hello. I support this feature. Today, we can use MANIFEST.in to exclude some files (ex: test files) from the source distribution package. This does not impact binary distribution packages and wheel.

Great! Thanks! Can I use it now? (required upstream of oslo.config?)