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Cython C extension wrapping libstemmer_c (downloaded and compiled by setup.py at build time, sha256-pinned); no pyproject.toml, so Cython has to be preinstalled and the build run with --no-build-isolation.
luhenry
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Sep 6, 2026
The manylinux riscv64 cp312+ interpreters don't bundle setuptools, so --no-build-isolation left pip unable to import setuptools.build_meta.
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pystemmer3.1.0Compiles the Cython
Stemmerextension, which wrapslibstemmer_c(downloaded and sha256-checked bysetup.pyat build time). Upstream publishes no riscv64 wheel.Mirrors upstream's
ci.ymlbuild step.Differs from upstream
before-build, build runs--no-build-isolation- nopyproject.tomlto declare it as a build requirement.tests/test_pystemmer.py, notruntests.py's doctest - its expected algorithm list predates libstemmer_c 3.1.0's four new stemmers, and upstream's own CI never actually runs it (a\-continued shell line swallows the real command).Testing
License: OK - the downloaded
libstemmer_c(BSD) is already covered by PyStemmer's ownLICENSEfile alongside its own (MIT).Built on cp312; 11 passed.