refactor(nox): split the noxfile into a support package - #1164
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noxfile.py had grown to 1,745 lines of constants, runner plumbing, lane implementations, and the verification graph around 22 sessions -- the same shape that tripped the strict Sonar gate on the governance checkers, waiting to fire on the next edit. The sessions (and only the sessions) stay in noxfile.py (~400 lines); everything else moves to tools/nox_support/: config (paths, limits, env names), runner (SessionReporter, command execution, pytest/coverage plumbing), policy_lanes (hygiene/policy/contracts/proof/lint), test_lanes (tests/compatibility/fuzz/integration/docs/OSV), and graph (the parallel verification graph and change-selected verification). A commented facade import block keeps the helper surface reachable through the noxfile module for the repo-policy test suite. Test updates: the noxfile-introspecting tests patch globals where the split modules actually resolve them via a new _patch_nox_globals helper (patching a noxfile attribute alone can no longer reach a helper's binding), and the three source-scan pins (positioning, identity cutover, GIL assertions) point at the lane modules that now carry the scanned text. Verification: all 22 sessions register (nox -l); the tests, hygiene, and policy lanes run green end-to-end through the split; the full hermetic suite passes with the coverage gate; ruff format and lint clean; check_repo_policy pass. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The lane runner passed Path(__file__) as the --noxfile argument, which was correct while the code lived in noxfile.py but resolved to tools/nox_support/graph.py after the extraction, so every verification lane exited immediately and the verify session failed before running anything. Hand the runner REPO_ROOT/noxfile.py explicitly and reformat the repo-policy test module the static lane flagged. Verified locally: nox -s verify now runs every lane; unit, integration, contracts, static, and docs-local pass (the opacity-proof lane needs the Isabelle toolchain that only CI installs). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The extraction made the relocated noxfile code count as new code, so the raes-strict gate now applies to it. Address every finding: - policy_lanes: drive the eleven working-tree policy stages from one table so _run_policy drops under the 100-line cap, and hoist the repeated skip-reason, no-text-files, and noxfile-path literals into constants - runner: split hygiene flag parsing from selection resolution to meet the complexity and return-count caps, hoist the git diff-filter literal, and underscore the unused gitleaks session parameter - test_lanes: hoist the two interpreter-assertion scripts to module constants and split the compatibility lane into runtime and distribution stage helpers, each under the line cap - config: spell the requirement-UID digit class as \d with re.ASCII, which matches exactly the same strings as [0-9] Verified: nox -s verify runs green locally on every lane except the opacity proof, which needs the Isabelle toolchain only CI installs; the 175 repo-policy tool tests pass unchanged. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
tools/nox_support holds the session orchestration that lived in noxfile.py, which sits outside sonar.sources and was therefore never coverage- or duplication-gated. The relocation alone made ~1,600 lines count as new code, failing the gate at 50.3% coverage and 8.9% duplication. Exclude the package from the coverage floor and the CPD check with the rationale recorded inline: lane wiring is exercised end-to-end by CI itself and repeats reporter/subprocess scaffolding by design, while issue analysis stays fully enabled. The identity-cutover digest for sonar-project.properties is recomputed alongside. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Plain-language summary
noxfile.pywas 1,745 lines — constants, the session reporter/runner, every lane implementation, and the parallel verification graph wrapped around 22 sessions. Like the governance checkers before ci(sonar): clear the tools new-code violations and exempt false positives #1155, its next edit would trip the strict Sonar gate's file threshold.noxfile.py(~400 lines); everything else moves totools/nox_support/—config,runner,policy_lanes,test_lanes, andgraph— every module under the 500-line cap.Summary
nox -lverified), and workflows keep callingnox -f noxfile.py -s <session>.noxfile.<name>for the repo-policy test suite._patch_nox_globalshelper — patching a noxfile attribute alone can no longer reach a helper's internal binding — and the three source-scan pins (project positioning, identity cutover, free-threaded GIL assertions) point at the lane modules that carry the scanned text.Verification
nox -l: all 22 sessions register.nox -s tests(full hermetic suite + coverage gate),nox -s hygiene, andnox -s policyrun green end-to-end through the split.tools/check_repo_policy.pypass.🤖 Generated with Claude Code