‘pip setup.py bdist_wheel’ no longer builds forced non-pure wheels

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I’ve just run into this issue myself with Python v2.7 and wheel v0.29.0 on Windows 7 x64, where I build a Python package with some pre-compiled extensions (complicated VisualStudio setup with SWIG and external DLLs).

After examining the source code I have found that overriding Distribution.has_ext_modules works (automatically includes platform name and ABI tag):

from setuptools import setup
from setuptools.dist import Distribution

DISTNAME = "packagename"
DESCRIPTION = ""
MAINTAINER = ""
MAINTAINER_EMAIL = ""
URL = ""
LICENSE = ""
DOWNLOAD_URL = ""
VERSION = '1.2'
PYTHON_VERSION = (2, 7)


# Tested with wheel v0.29.0
class BinaryDistribution(Distribution):
    """Distribution which always forces a binary package with platform name"""
    def has_ext_modules(foo):
        return True


setup(name=DISTNAME,
      description=DESCRIPTION,
      maintainer=MAINTAINER,
      maintainer_email=MAINTAINER_EMAIL,
      url=URL,
      license=LICENSE,
      download_url=DOWNLOAD_URL,
      version=VERSION,
      packages=["packagename"],

      # Include pre-compiled extension
      package_data={"packagename": ["_precompiled_extension.pyd"]},
      distclass=BinaryDistribution)

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