Maintenance/code cleanup 2026-05 Phase V (performance and pure python resolver prework) - #6668

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matteius wants to merge 48 commits into

maintenance/code-cleanup-phase4-deferred-2026-05from

maintenance/code-cleanup-phase5-perf-2026-06

Commits on Aug 3, 2026

perf(lock): skip resolver subprocess for empty Pipfile categories

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perf(lock): feed prior Pipfile.lock pins as pip constraints on warm relock

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Revert "perf(lock): feed prior Pipfile.lock pins as pip constraints on warm relock"
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perf(startup): defer pip-internal network imports in fileutils + internet

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perf(startup): defer pip-internal InstallCommand + unpack + Downloader imports

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docs(initiative-g): draft pure-Python resolver-backend design

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docs(initiative-g): phase 1+2 swarm-ready implementation plan

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feat(resolver): auth helpers — netrc + URL creds + client cert (T6, Initiative G phase 1)

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test(resolver): PEP 691 + PEP 503 simple-API test fixtures (T2, Initiative G phase 1)

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feat(resolver): Candidate dataclass + Hash namedtuple (T1, Initiative G phase 1)

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feat(settings): add prefetch_index_manifests boolean (T18, Initiative G phase 2)

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feat(resolver): SimplePageResponse + FetchError types (T3, Initiative G phase 1)

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feat(resolver): ParsedManifestCache — JSON-on-disk with TTL + atomic write (T7, Initiative G phase 1)

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test(resolver): full Candidate coverage — wheel-tag platform variants + hashability + edge cases (T11, Initiative G phase 1)

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test(resolver): auth helper test suite — extract/netrc/cert (T16, Initiative G phase 1)

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docs(initiative-g): mark Wave 2 task statuses Completed (T7, T11, T16)

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feat(resolver): PEP 691 JSON simple-API parser (T4, Initiative G phase 1)

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feat(resolver): PEP 503 HTML simple-API parser (T5, Initiative G phase 1)

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feat(resolver): PEP691Client class — HTTP layer + auth + status dispatch (T8, Initiative G phase 1)

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test(resolver): pip-parser parity tests on T2 fixtures (T10, Initiative G phase 1)

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test(resolver): full ParsedManifestCache coverage — TTL, atomic write, concurrency (T14, Initiative G phase 1)

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test(resolver): full PEP691 + PEP503 parser coverage (T12, Initiative G phase 1)

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docs(initiative-g): mark Wave 3 + Wave 4 task statuses Completed

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feat(resolver): ParallelFetcher — concurrent simple-API fetch driver (T9, Initiative G phase 1)

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fix(tests): patch unpack_url at canonical source after the phase-5 lazy-import move

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test(resolver): full PEP691Client coverage — status dispatch + auth + headers (T13, Initiative G phase 1)

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docs(initiative-g): mark Wave 5 task statuses Completed (T9, T13)

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test(resolver): full ParallelFetcher coverage — dispatch + cache + concurrency (T15, Initiative G phase 1)

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feat(lock): wire ParallelFetcher into do_lock behind PIPENV_PREFETCH_INDEX_MANIFESTS (T19, Initiative G phase 2)

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feat(initiative-g): Phase 1 ship bundle — exports, --clear wiring, coverage gate, lint gate, news, doc (T17)

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docs(initiative-g): Phase-2 ship docs — prefetch_index_manifests user doc + news + status flip (T22)

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test(lock): integration tests for prefetch_index_manifests path (T20, Initiative G phase 2)

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fix(lock): align --clear path with prefetch path for parsed-manifest cache

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docs(initiative-g): mark Wave 6 + Wave 7 task statuses Completed

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feat(resolver): thread per-request verify/cert in PEP691Client.fetch (FU3, Initiative G phase-3 prep)

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feat(lock): per-source verify_ssl fan-out for prefetcher (FU2, Initiative G phase-3 prep)

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feat(resolver): peek_etag for stale-cache short-circuit (FU1, Initiative G phase-3 prep)

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docs(initiative-g): record FU1+FU2+FU3 phase-3 follow-ups landing early

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perf(resolver): eliminate redundant find_best_candidate walk in resolve_constraints

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docs(resolver): document resolve_constraints behaviour change for ignore_compatibility users

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check pt
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fix(resolver): stamp selected backend onto resolver requests

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refactor(resolver): narrow backend settings fallback handling

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test(resolver-protocol): regenerate request.json golden for stamped backend field

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fix(manifest-cache): retry os.replace on Windows ERROR_ACCESS_DENIED with wall-clock budget

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fix(resolver-auth): treat quote-only netrc login as empty on Python 3.10

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fix(tests): validate prefetch source hostnames structurally
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Merge remote-tracking branch 'origin/maintenance/code-cleanup-phase4-deferred-2026-05' into codex/phase5-merge-latest
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