NewExternalC1FileReader: Clean up temp files if NewC1File errors.

[ggreer]

Also open the external c1z file in read-only mode. We never modify it, and we never should.

Summary by CodeRabbit

• Bug Fixes

  • Improved error handling and data safety in C1 file processing with enhanced recovery mechanisms.

• Chores

  • Enhanced logging capabilities for improved debugging and diagnostics.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Walkthrough

The dotc1z.go file has been enhanced with structured logging capabilities and refactored to support a functional options pattern. The NewC1File function signature now accepts variadic options for configuration, and NewExternalC1FileReader uses a read-only option when instantiating C1 files post-decompression.

Changes

Cohort / File(s)	Summary
Logging & Configuration Enhancement pkg/dotc1z/dotc1z.go	Added zap and ctxzap imports for structured logging. Introduced debug logging after C1Z file decompression. Modified NewC1File signature to accept variadic C1FOption parameters, enabling read-only mode via WithC1FReadOnly(true). Enhanced error handling with improved cleanup logic in NewExternalC1FileReader.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 Our logger now hops with grace,
Structured logs in every place,
Options dance in varied ways,
Read-only mode to guard our days,
Logs that shine through darkest maze! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding cleanup logic for temporary files when NewC1File errors, which is a primary objective of the PR.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ggreer/external-c1z-cleanup

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