feat(coverage): add Python 3.14 support and bump coverage.py to 7.10.7#3764
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aignas merged 3 commits intobazel-contrib:mainfrom May 10, 2026
Merged
feat(coverage): add Python 3.14 support and bump coverage.py to 7.10.7#3764aignas merged 3 commits intobazel-contrib:mainfrom
aignas merged 3 commits intobazel-contrib:mainfrom
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- Regenerate coverage_deps.bzl against coverage 7.10.7 - Add cp314 (incl. freethreaded cp314t variants) to the bundled set - Drop cp38 (coverage.py 7.6.2 dropped Python 3.8) - Teach update_coverage_deps.py the newer wheel platform tags (manylinux1_x86_64, macosx_10_13_x86_64) used by coverage 7.10.7 - Narrow coverage.patch context to apply against the 7.10.7 coverage/__main__.py layout
- coverage.md: note that configure_coverage_tool=True is only effective for the Python versions the bundled coverage wheel set covers (CPython 3.9-3.14, freethreaded for 3.13+); outside that range it is a silent no-op and produces empty lcov. - devguide.md: bump the example version in the regen command from 7.6.1 to 7.10.7 to match what is now bundled.
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This pull request updates coverage.py to 7.10.7, adds support for Python 3.14 (including freethreaded variants), and drops support for Python 3.8. The changes span dependency definitions, documentation, and the dependency update tool. Feedback was provided regarding the placement of the CHANGELOG entry, suggesting it be moved to a more appropriate section.
Per review feedback on PR bazel-contrib#3764, "add support for python 3.14 and bump coverage.py" is structurally an addition, not a fix. Mirrors the placement of the prior 3.13 entry (bazel-contrib#2265). Splits the python 3.8 drop into its own Removed entry rather than burying it in the Added line.
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aignas
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May 10, 2026
| :::{note} | ||
| The bundled `coverage` wheel set covers CPython 3.9 through 3.14 (with | ||
| freethreaded variants for 3.13+). For Python versions outside that range, | ||
| `configure_coverage_tool = True` is a silent no-op and `bazel coverage` will |
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I would be happy to receive a PR for bzlmod that would print a warning if the coverage tool was not found.
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On rules_python 2.0.0,
python.toolchain(configure_coverage_tool = True)is a silent no-op whenpython_version = "3.14": the bundledcoverage.pywheel set inpython/private/coverage_deps.bzlcovers cp310–cp313 only, sobazel coverageproduces zero-byte per-test lcov files forpy_testtargets. This PR bumps the bundled coverage to 7.10.7 (which ships cp39–cp314 wheels, including freethreaded variants for cp313+) and regenerates the wheel set.coverage_deps.bzlagainst coverage 7.10.7update_coverage_deps.py's_supported_platformsmap with the newer wheel platform tags (manylinux1_x86_64,macosx_10_13_x86_64) used by coverage 7.10.7coverage.patchcontext to apply against the 7.10.7coverage/__main__.pylayoutdocs/coverage.mdVerification:
bazel test //tests/python:python_tests //tests/py_runtime:py_runtime_tests --test_tag_filters=-integration-test→ 37/37 pass (incl.test_coverage_tool_executable,test_coverage_tool_plain_files)local_path_overridethis branch into a minimal external workspace, setpython_version = "3.14"withconfigure_coverage_tool = True, runbazel coverageon apy_test→ produces a non-empty per-test lcov withSF:,FNDA:reflecting actual call counts, andLH:non-zero