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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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merged in #321 |
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Problem
The
nixworkflow buildsojonmacos-14for every PR push, and each run is a cold ~48-minute build. With noconcurrencyblock, a new push to a PR leaves the older run going to completion. On Sep 18, Sep 28 and Oct 1 superseded PR runs burned ~300–400 macOS minutes a day (billed ~10× Linux).Change
A workflow-level
concurrencygroup keyed on the PR number (or ref) cancels a PR's in-progress run when a newer commit arrives.cancel-in-progressis true only forpull_request: pushes tomainandworkflow_dispatchstill build every commit; overlapping ones queue instead of being cancelled.Larger follow-ups, not in this PR: drop the darwin leg from PR runs (~1,000–1,400 macOS min/day) and add a binary cache so darwin builds stop starting cold.
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