CI: support parallel coverage in reusable python workflow#240
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Allow projects to run the Django test suite in parallel under coverage: - drop `-a` from `coverage run` (append is incompatible with coverage parallel mode, concurrency=multiprocessing / parallel=true); - add a guarded `coverage combine` step before the coverage report so the per-process .coverage.* files produced by parallel workers are merged. Both changes are no-ops for projects that don't use parallel coverage (single coverage run needs no append; combine is skipped when there are no .coverage.* files). Applied to workflows/_python.yml and its hard-linked .github/ self-test copy. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
0ssigeno
approved these changes
Jul 21, 2026
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Allow projects to run the Django test suite in parallel under coverage:
-afromcoverage run(append is incompatible with coverage parallel mode, concurrency=multiprocessing / parallel=true);coverage combinestep before the coverage report so the per-process .coverage.* files produced by parallel workers are merged.Both changes are no-ops for projects that don't use parallel coverage (single coverage run needs no append; combine is skipped when there are no .coverage.* files). Applied to workflows/_python.yml and its hard-linked .github/ self-test copy.