Avoid loading working set during `Distribution.finalize_options` prior to invoking `_install_setup_requires`, broken since v42.0.0. Fixes #2158.
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@ -129,10 +129,27 @@ if PY3:
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def _install_setup_requires(attrs):
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# Note: do not use `setuptools.Distribution` directly, as
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# our PEP 517 backend patch `distutils.core.Distribution`.
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dist = distutils.core.Distribution(dict(
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(k, v) for k, v in attrs.items()
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if k in ('dependency_links', 'setup_requires')
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))
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class MinimalDistribution(distutils.core.Distribution):
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"""
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A minimal version of a distribution for supporting the
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fetch_build_eggs interface.
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"""
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def __init__(self, attrs):
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_incl = 'dependency_links', 'setup_requires'
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filtered = {
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k: attrs[k]
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for k in set(_incl) & set(attrs)
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}
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distutils.core.Distribution.__init__(self, filtered)
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def finalize_options(self):
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"""
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Disable finalize_options to avoid building the working set.
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Ref #2158.
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"""
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dist = MinimalDistribution(attrs)
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# Honor setup.cfg's options.
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dist.parse_config_files(ignore_option_errors=True)
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if dist.setup_requires:
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