codecov: fix ~/.gitconfig lock race on self-hosted runners (disable_safe_directory)#92
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ChrisRackauckas merged 1 commit intoJun 14, 2026
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… lock race on shared-home self-hosted runners) Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com> Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Problem (root cause, verified)
codecov/codecov-action@v7's internal Set safe directory step runsgit config --global --add safe.directory ..., which takes a lock on~/.gitconfig. The SciML self-hosteddemeterrunners share a single home directory (/home/chrisrackauckas) across many concurrent jobs, so thosegit config --globalcalls race for the same lockfile:The action then exits 255 and fails the job after the tests already passed.
fail_ci_if_error: falsedoes not help here because the failure happens in a pre-upload setup step, not in the upload itself. 100% of observed codecov job failures were ondemeter; 0% on GitHub-hosted/ephemeral runners.Fix
On every
codecov/codecov-action@v7step in the repo:disable_safe_directory: true— skips the racinggit config --globalcall entirely. This is a real input of codecov-action (added in v5+; present in v7). Harmless on hosted runners since the checkout dir is already trusted there.continue-on-error: trueon the step — so any future codecov setup-step non-zero exit can never fail an otherwise-green job.fail_ci_if_error: falseset explicitly inwith:for clarity/defense-in-depth.Files touched
.github/workflows/tests.yml(codecov step).github/workflows/documentation.yml(codecov step).github/workflows/downstream.yml(codecov step)actionlint clean.
NOTE: v1 must be retagged after merge for @v1 callers. Ignore until reviewed by @ChrisRackauckas.