Fix a few packaging details (PEP 639)#684
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Fixes a warning pointing to this webpage: https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license
doronbehar
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ilius
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Oct 22, 2025
| keywords = ["dictionary", "glossary"] | ||
| classifiers = [ | ||
| "Development Status :: 5 - Production/Stable", | ||
| "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)", |
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There are lots of these lines on Github. Why do we have to remove it?
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TBH, I'm not an expert in Python packaging, but I have a bit of experience and it seems counter productive that there are both pyproject.toml and a setup.py. Nowadays, you should be able to get along with only the first. Without this removal, with Nixpkgs' packaging which uses pypa/build, we get the error:
pypa build flags: --no-isolation --outdir dist/ --wheel
* Getting build dependencies for wheel...
/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/config/_apply_pyprojecttoml.py:82: SetuptoolsWarning: `license` overwritten by `pyproject.toml`
corresp(dist, value, root_dir)
/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/config/_apply_pyprojecttoml.py:82: SetuptoolsWarning: `extras_require` overwritten in `pyproject.toml` (optional-dependencies)
corresp(dist, value, root_dir)
Traceback (most recent call last):
File "/nix/store/436hp1arg079l5q1l5pifk6mzzj4bcwn-python3.13-pyproject-hooks-1.2.0/lib/python3.13/site-packages/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
main()
~~~~^^
File "/nix/store/436hp1arg079l5q1l5pifk6mzzj4bcwn-python3.13-pyproject-hooks-1.2.0/lib/python3.13/site-packages/pyproject_hooks/_in_process/_in_process.py", line 373, in main
json_out["return_val"] = hook(**hook_input["kwargs"])
~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/436hp1arg079l5q1l5pifk6mzzj4bcwn-python3.13-pyproject-hooks-1.2.0/lib/python3.13/site-packages/pyproject_hooks/_in_process/_in_process.py", line 143, in get_requires_for_build_wheel
return hook(config_settings)
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
return self._get_build_requires(config_settings, requirements=[])
~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
self.run_setup()
~~~~~~~~~~~~~~^^
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/build_meta.py", line 317, in run_setup
exec(code, locals())
~~~~^^^^^^^^^^^^^^^^
File "<string>", line 121, in <module>
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/__init__.py", line 115, in setup
return distutils.core.setup(**attrs)
~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/_distutils/core.py", line 160, in setup
dist.parse_config_files()
~~~~~~~~~~~~~~~~~~~~~~~^^
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/dist.py", line 756, in parse_config_files
pyprojecttoml.apply_configuration(self, filename, ignore_option_errors)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/config/pyprojecttoml.py", line 73, in apply_configuration
return _apply(dist, config, filepath)
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/config/_apply_pyprojecttoml.py", line 61, in apply
dist._finalize_license_expression()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/nix/store/a53syg4q2wk1jhw24gqnib37pkgacndy-python3.13-setuptools-80.9.0/lib/python3.13/site-packages/setuptools/dist.py", line 430, in _finalize_license_expression
raise InvalidConfigError(
...<3 lines>...
)
setuptools.errors.InvalidConfigError: License classifiers have been superseded by license expressions (see https://peps.python.org/pep-0639/). Please remove:
License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
ERROR Backend subprocess exited when trying to invoke get_requires_for_build_wheel
ilius
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While trying to package this wonderful program to Nixpkgs, I encountered the need for these 2 changes.
Reference: