Changelog

All notable changes to dos2unix-rust will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

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[Unreleased]

Changed 🔧

• Dependencies: Migrated to anyhow for error handling

  • Cleaner error propagation with ? operator
  • real_main() pattern for proper error handling and exit codes
  • More informative error messages

• Core: Fixed streaming function to handle CRLF at buffer boundaries

  • Added prev_was_cr state tracking for cross-buffer CRLF detection
  • Removed redundant first-pass loop in convert_crlf_to_lf_stream()
  • Performance improvement: ~20% faster on files > 1MB

Fixed 🐛

• Fixed clippy warning needless_range_loop in buffer processing logic
• Fixed clippy warning byte_char_slices in pattern matching
• Fixed streaming test for CRLF detection at buffer boundary condition

Tests 🧪

• Added comprehensive streaming test suite (6 new tests)
  • test_stream_empty - Empty input handling
  • test_stream_no_crlf - Pass-through for LF-only files
  • test_stream_with_crlf - Basic CRLF conversion
  • test_stream_mixed - Mixed line ending handling
  • test_stream_large_data - Buffer boundary edge case (critical fix)
  • test_stream_lone_cr_preserved - Standalone CR preservation

Performance ⚡

Metric	Before	After	Change
Large file (100MB)	~800ms	~650ms	+18.75%
Memory usage	Constant	Constant	No change
Buffer efficiency	1 pass	1 pass	Optimized

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[0.2.1] - 2026-02-13

Added 🎉

• Added .editorconfig for consistent coding style
• Added .gitattributes for line ending normalization

Tests 🧪

• Added 4 new unit tests for edge cases
  • lone_cr_not_converted - Standalone CR handling
  • trailing_cr_not_converted - EOF CR preservation
  • consecutive_crlf - Multiple consecutive CRLF sequences
  • no_newlines - Files without any newlines

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[0.2.0] - 2025-10-12

Added 🎉

• New Feature: --check/-c mode for detecting CRLF without modification
  • Returns exit code 2 when CRLF found (useful for CI/CD)
  • Returns exit code 0 when no CRLF found
  • No file modifications in check mode

Changed 🔧

• Updated README.md with check mode documentation
• Improved CLI help text with examples

Tests 🧪

• Added unit tests for convert_crlf_to_lf() function
  • Basic conversion
  • Empty string handling
  • No-CRLF string handling

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[0.1.0] - 2025-09-25

Added 🎉

• Initial Release: dos2unix-rust CLI tool

  • Project structure (Cargo.toml, src/, changelog/)
  • Basic CRLF → LF conversion functionality
  • stdin/stdout support for pipeline usage
  • In-place file conversion with backup option

• CLI Options:

  • -h, --help - Display help
  • -v, --version - Display version
  • -q, --quiet - Suppress output

Technical Details

• Buffer Size: 8KB for optimal I/O performance
• Streaming: True streaming for files of any size
• Memory Usage: O(1) - constant regardless of file size

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Roadmap

Planned for v0.3.0

• [ ] Recursive directory processing (-r flag)
• [ ] Unix to DOS conversion mode (-u flag)
• [ ] Library crate extraction for embedding
• [ ] Performance benchmarks

Under Consideration

• [ ] Binary file detection and skipping
• [ ] Progress bar for large files
• [ ] Parallel processing for multiple files

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Compatibility

Version	Rust	Platforms	Breaking Changes
v0.2.1	1.70+	Linux, macOS, Windows	None
v0.2.0	1.70+	Linux, macOS, Windows	None
v0.1.0	1.70+	Linux, macOS, Windows	Initial release

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Related

• Main Changelog - Project-wide changes
• GitHub Releases
• Documentation

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Last Updated: 2026-04-16