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fix: close CLI capture files after output errors - #315
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Reviewer's GuideFixes CLI capture cleanup by context-managing owned output files and using nullcontext for stdout, ensuring files close on write failures without changing stream ownership or output behavior; adds six tests covering failure cleanup, ownership, and successful content. Sequence diagram for CLI capture output cleanupsequenceDiagram
participant CLI as collect
participant Destination as Output destination
participant Writer as csv.writer or json.dump
CLI->>Destination: open(args.file_path) or nullcontext(sys.stdout)
CLI->>Destination: enter context
CLI->>Writer: write capture output
alt write succeeds
Writer-->>CLI: output complete
CLI->>Destination: exit context
Destination-->>CLI: close owned file
else write raises
Writer-->>CLI: propagated write error
CLI->>Destination: exit context
Destination-->>CLI: close owned file
end
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info
📝 Walkthrough
Merge Risk: ⚪ Minimal · up to The CLI now closes capture files when output fails and keeps the original write error visible. Stdout is left open. Merge risk is minimal. Pre-merge checks |
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| Check name | Status | Explanation | Resolution |
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Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 2 files. | Write docstrings for the functions missing them to satisfy the coverage threshold. |
✅ Passed checks (4 passed)
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Check name Status Explanation Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request. Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Title check The title clearly describes the main change: closing CLI capture files after output errors.
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Actionable comments posted: 1
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Inline comments:
Review comments at @pslab/cli.py:
- Around line 150-165: Update the output-writing flow around `output_file` so a
close `OSError` cannot replace an active CSV or JSON write exception: close the
capture file explicitly on failure, suppress only the close error, and re-raise
the original exception. Keep normal close errors visible after successful writes
and leave `sys.stdout` open.
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pslab/cli.pytests/test_cli_output_cleanup.py
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When CSV or JSON capture output raises during a write,
collect()skips its manual file close. The destination stays open while the exception traceback retains the frame.Close owned files on both successful and failed output while leaving stdout open. On a write failure, suppress only a close OSError before re-raising the write error; successful writes still expose close errors. Output content and acquisition behavior remain unchanged.
Validation: two real-file regressions fail on unchanged main; four ownership/content controls pass. Review exposed a second edge case where closing failed during a write error; two additional regressions failed on the initial PR head and two success-path close-error controls passed. The current branch passes all ten new cases and 33 existing CLI, Pico SCPI and MQ135 tests (43 total). A separate review reran the focused cases. Configured Black, Flake8, Bandit and pydocstyle, wheel/sdist and Sphinx builds pass; seven existing documentation warnings remain. The updated head passes changed-file checks and packaging; scoped CLI coverage is 74.346%. This is not a whole-package coverage claim.
No physical hardware or full device integration suite was run. Partial files are closed, not deleted, and closing a file can still raise a filesystem error. Current issue comments and open patches were checked for overlap. Developed and tested with Codex assistance.
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