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pymongo ships per-interpreter compiled wheels (bson._cbson, pymongo._cmessage) for every arch but riscv64. Build-from-checkout with cibuildwheel, inheriting upstream's [tool.cibuildwheel] config. PYMONGO_C_EXT_MUST_BUILD=1 keeps _setup.py's optional-extension fallback from silently shipping a pure-Python wheel. Tests run upstream's fail_if_no_c.py plus the server-free subset of the suite that exercises the C extension, staged via test-sources so the installed wheel is imported instead of the checkout. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Adds
.github/workflows/build-pymongo.yml, building riscv64 wheels forpymongo 4.17.0 and publishing them to
pypi.riseproject.dev.pymongo ships per-interpreter compiled wheels (
bson._cbson,pymongo._cmessage) for every architecture on PyPI except riscv64, so thematrix is
cp312/cp313/cp314/cp314t(not abi3).Shape: build-from-checkout of the upstream
4.17.0tag,pypa/cibuildwheelwith
only: <tag>-manylinux_riscv64, inheriting upstream's[tool.cibuildwheel](build-frontend = "build",skip = "pp* *-musllinux*")from
pyproject.toml— same as upstream's owndist.yml.Two riscv-relevant details:
PYMONGO_C_EXT_MUST_BUILD=1—_setup.py'scustom_build_extswallowscompile failures and ships a pure-Python wheel that still carries the
manylinux_riscv64tag (CLAUDE.md gotcha 20). This makes a failure fatal.test-sourcesstagestest/,tools/andpyproject.tomlintocibuildwheel's empty test cwd. Run from the checkout instead, pytest would
put the repo root on
sys.pathand import the pure-Pythonbson/sourcerather than the installed wheel — verified locally,
bson.has_c()wasFalsethat way.Testing mirrors upstream's wheel test (
tools/fail_if_no_c.py) and adds thesubset of the suite that exercises the C extension without a running mongod —
including the BSON spec corpus. Locally (x86-independent check on macOS/arm64):
266 passed, 45 skipped, 33 subtests passed, with
bson.has_c()true.