CI: prevent virtualenv redirect from occupying .venv - #26167
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Eleanor Boyd (eleanorjboyd) merged 3 commits intoSep 25, 2026
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Eleanor Boyd (eleanorjboyd) merged 3 commits into
Eleanor Boyd (eleanorjboyd) merged 3 commits into
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The venv matrix failed on both Windows and Linux when .venv was already occupied. Give the venv test interpreter a distinct path and log .venv state around setup so the producer of the collision can be identified in the next CI run.\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
virtualenv 21.12 writes a .venv redirect file next to .virtualenv when a pyproject.toml exists. Disable that redirect so the following stdlib venv step can create its intended .venv directory. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Eleanor Boyd (eleanorjboyd)
changed the title
Keep the virtualenv redirect opt-out and explicit venv creation failure check; the path logging is no longer needed now that the collision is confirmed. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Eleanor Boyd (eleanorjboyd)
marked this pull request as ready for review
September 25, 2026 15:10
Eleanor Boyd (eleanorjboyd)
enabled auto-merge (squash)
September 25, 2026 16:23
Raymond Zhao (rzhao271)
approved these changes
Sep 25, 2026
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Why
The virtualenv 21.12.0 update introduced a PEP 832
.venvredirect: when a project has apyproject.toml, creating.virtualenvcan also write a.venvfile pointing to it. Our CI workflow copies in apyproject.toml, creates.virtualenvfor virtualenv tests, then runspython -m venv .venvfor separate stdlib venv tests. Once virtualenv started writing that file, the latter command could no longer create its.venvdirectory. The passing run installed virtualenv 21.11.1; the failing release-branch runs installed 21.12.1.Change
Pass
--no-venv-redirectwhen creating.virtualenv. This opts out of the newly added side effect while keeping the two existing test environments at their original paths:.virtualenvfor virtualenv and.venvfor stdlib venv. Stop immediately if stdlib venv creation fails rather than reporting the subsequent missing executable as the primary error.Related to #26164. The release branch still needs this fix and a passing Build workflow before release.