May 26 - July 28, 2024 in Darker: Action improvements and exit code refinements

[akaihola]

This period saw significant progress in enhancing Darker's GitHub Action and refining our exit codes. We've been working on making the action respect the working-directory setting (PR #591), addressing a previously reported issue (Issue #587). This change is slated for the upcoming Darker 3.0.0 release, as it involves backwards-incompatible modifications to exit codes.

Speaking of exit codes, we've refined them to provide more specific information about different error scenarios (PR #595). Now, we use distinct codes for file not found (2), invalid arguments (3), missing dependencies (4), and unknown failures (123). This aligns better with other tools like Black and improves error handling in CI/CD pipelines. We're also considering a unique exit code (21) for the GitHub action when the specified working-directory doesn't exist (Issue #594).

In other developments, we've added support for Black's --preview flag via Darker's CLI and configuration files (PR #589), addressing a long-standing feature request. We're also exploring the possibility of supporting ruff format as an alternative formatter (Issue #521), which could potentially offer performance improvements. Lastly, we fixed a CI compatibility issue with Pip >= 24.1 (PR #597) and updated our documentation to include py313 in the --target-version choices (PR #596), keeping in sync with Black's updates.

---

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