| Message ID | 20220124185643.641848-2-jsnow@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | Python: setuptools v60+ workaround | expand |
diff --git a/python/tests/iotests-pylint.sh b/python/tests/iotests-pylint.sh index 4cae03424b..33c5ae900a 100755 --- a/python/tests/iotests-pylint.sh +++ b/python/tests/iotests-pylint.sh @@ -1,4 +1,5 @@ #!/bin/sh -e cd ../tests/qemu-iotests/ -python3 -m linters --pylint +# See commit message for environment variable explainer. +SETUPTOOLS_USE_DISTUTILS=stdlib python3 -m linters --pylint diff --git a/python/tests/pylint.sh b/python/tests/pylint.sh index 4b10b34db7..03d64705a1 100755 --- a/python/tests/pylint.sh +++ b/python/tests/pylint.sh @@ -1,2 +1,3 @@ #!/bin/sh -e -python3 -m pylint qemu/ +# See commit message for environment variable explainer. +SETUPTOOLS_USE_DISTUTILS=stdlib python3 -m pylint qemu/
Setuptools v60 and later include a bundled version of distutils, a deprecated standard library scheduled for removal in future versions of Python. Setuptools v60 is only possible to install for Python 3.7 and later. Python has a distutils.sysconfig.get_python_lib() function that returns '/usr/lib/pythonX.Y' on posix systems. RPM-based systems actually use '/usr/lib64/pythonX.Y' instead, so Fedora patches stdlib distutils for Python 3.7 and Python 3.8 to return the correct value. Python 3.9 and later introduce a sys.platlibdir property, which returns the correct value on RPM-based systems. The change to a distutils package not provided by Fedora on Python 3.7 and 3.8 causes a regression in distutils.sysconfig.get_python_lib() that ultimately causes false positives to be emitted by pylint, because it can no longer find the system source libraries. Many Python tools are fairly aggressive about updating setuptools packages, and so even though this package is a fair bit newer than Python 3.7/3.8, it's not entirely unreasonable for a given user to have such a modern package with a fairly old Python interpreter. We can force the loading of the platform-provided distutils when running the pylint test; this is the least-invasive yet most comprehensive fix until the dust settles upstream and the picture becomes more clear. References: https://github.com/pypa/setuptools/pull/2896 https://github.com/PyCQA/pylint/issues/5704 https://github.com/pypa/distutils/issues/110 Signed-off-by: John Snow <jsnow@redhat.com> --- python/tests/iotests-pylint.sh | 3 ++- python/tests/pylint.sh | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-)