workflow(release): surface subprocess output and improve error handling in backport operations - #4056
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rickeylev merged 6 commits intoAug 15, 2026
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Subprocess failures during `process-backports` swallowed stderr and stdout details because top-level error handling only printed the exception message without notes or traceback. Print tracebacks on unexpected errors and add a `format_exception` helper to include attached PEP 678 notes.
Release operations rely on structured logs for diagnostics and debugging. Configure logging to stderr with line numbers in the release CLI entry point and replace print calls in process_backports with logger methods.
Branch checkouts and resets during error handling or dry runs in sync changelog were unlogged. Add info logging for resetting main and restoring the release branch.
…failure Define a custom CreatePrError exception raised when GitHub PR creation fails, capturing the command, error details, and formatted stdout/stderr blocks.
rickeylev
marked this pull request as ready for review
August 15, 2026 18:16
rickeylev
enabled auto-merge
August 15, 2026 18:16
Ensure runfiles.Create() result is not None before accessing Rlocation, resolving Pyrefly type checking errors in CI.
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When backporting changes or creating pull requests during release
automation, subprocess errors frequently hid command failure details
because stdout and stderr were not captured in the raised exceptions.
Additionally, process logging relied on raw print statements and
cleanup operations lacked diagnostic logs.
To improve debuggability and observability:
CreatePrError exceptions when PR creation fails.
block.