python-devel May 2026

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3 discussions

%pyproject_patch_dependency macro now available (provisional)
by Charalampos Stratakis 14 Aug '26

14 Aug '26

Hello folks, Tired of figuring out the right sed or patch to modify dependency constraints in your Python packages? Or having your carefully crafted regex break because upstream reformatted their metadata? %pyproject_patch_dependency is here to help. A new macro has been merged into pyproject-rpm-macros and is available in Rawhide, F44 and F43 as a provisional feature. It provides a uniform way to override upstream dependency constraints in %prep, regardless of the build backend. It affects both BuildRequires and runtime Requires. Example usage: %prep %autosetup -p1 %pyproject_patch_dependency cython:drop_upper %pyproject_patch_dependency numpy:set_upper:3.0 %pyproject_patch_dependency legacy-dep:ignore It also handles circular/sibling dependencies in multi-wheel specs via the br_only suffix. A sibling package can be ignored in BuildRequires (since it's not yet installed during build) while keeping it as a runtime Requires: %pyproject_patch_dependency sibling-package:ignore:br_only The feature is marked provisional, meaning the API may change based on real-world usage. If you maintain Python packages and deal with dependency version overrides, I'd appreciate if you gave this a try and reported any issues. Documentation (Provisional: Overriding dependency constraints section) <https://src.fedoraproject.org/rpms/pyproject-rpm-macros/blob/rawhide/f/READ…> <https://src.fedoraproject.org/rpms/pyproject-rpm-macros/blob/rawhide/f/READ…> Implementation <https://src.fedoraproject.org/rpms/pyproject-rpm-macros/c/5d9798f289ea8cbeb…> F44 bodhi update <https://bodhi.fedoraproject.org/updates/FEDORA-2026-c50219cb79> F43 bodhi update <https://bodhi.fedoraproject.org/updates/FEDORA-2026-051d1b3285> -- Regards, Charalampos Stratakis Senior Software Engineer Python Maintenance Team, Red Hat

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buildrequires question
by Orion Poplawski 22 May '26

22 May '26

python-scikit-image's pyproject.toml file has a section with: [build-system] build-backend = 'mesonpy' requires = [ 'meson-python>=0.16', 'Cython>=3.0.8,!=3.2.0b1', 'pythran>=0.16', 'lazy_loader>=0.4', 'numpy>=2.0', ] how can I get %pyproject_generatebuildrequires to add those dependencies? Thanks! -- Orion Poplawski he/him/his - surely the least important thing about me IT Systems Manager 720-772-5637 NWRA, Boulder/CoRA Office FAX: 303-415-9702 3380 Mitchell Lane orion(a)nwra.com Boulder, CO 80301 https://www.nwra.com/

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Yes, another pyproject-rpm-macros release is out and with --long-options
by Miro Hrončok 10 May '26

10 May '26

Hello Pythonistats, we have been busy at pyproject-rpm-macros, so here's a third enhancement release in 2 weeks. pyproject-rpm-macros 1.22.0 and it brings in one major and one minor improvement: Add long option support for all public parametric macros ======================================================== Now you can use self-explanatory long options: %pyproject_buildrequires --no-runtime %pyproject_save_files --assert-license ... Instead of cryptic short options: %pyproject_buildrequires -R %pyproject_save_files -l ... See the full option set in the README https://src.fedoraproject.org/rpms/pyproject-rpm-macros/blob/rawhide/f/READ… Section "Long option support and options reference" This was previously discussed in https://lists.fedoraproject.org/archives/list/python-devel@lists.fedoraproj… I would like to explicitly thank Maxwell G for a very thorough review with many great remarks and suggestions. PS, this also mean %pyproject_save_files accepts --auto (as a more natural alternative to +auto). %pyproject_patch_dependency: Validate arguments early, in %prep =============================================================== When python3 and pyproject-rpm-macros are installed, the %pyproject_patch_dependency macro now validates the argument in %prep time, catching invalid overrides immediately instead of in %pyproject_buildrequires. When only pyproject-srpm-macros is installed, validation is skipped gracefully (and the error will happen later in the build). This should shorten the packager feedback loop when experimenting with %pyproject_patch_dependency (from fedpkg mockbuild to fedpkg prep). ---------------------------------------------------------------------- Anyway, the new version of the package is available in Rawhide, and updates testign for older Fedoras. Backports are planned for CentOS Stream 9+10 during this RHEL y-stream release cycle. When the dust settles, I plan to update https://docs.fedoraproject.org/en-US/packaging-guidelines/Python/ with the long options. Happy packaging, -- Miro Hrončok -- Phone: +420777974800

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python-devel May 2026