v0.6.0

New Features

• SSH Configuration File Support: Added -F option for SSH config file parsing with full compatibility
• PTY Allocation: Implemented true PTY allocation for interactive mode with secure terminal handling
• SSH-Compatible Command-Line Interface: Enhanced CLI to provide drop-in SSH replacement functionality
• Help Message Improvements: Show help when no arguments provided and add Backend.AI branding to help output
• Security Enhancements: Comprehensive security hardening across the codebase

Improvements

• Performance Optimizations:
  • Implemented tokio::select! for efficient event multiplexing in PTY sessions
  • Added SSH config caching with LRU cache for better performance
  • Implemented async file I/O for SSH config operations
  • Added environment variable caching to reduce system calls
• Code Quality:
  • Split monolithic ssh_config.rs into focused modules for better maintainability
  • Resolved all clippy warnings for cleaner code

Bug Fixes

• PTY Session Management: Fixed PTY session termination hanging issue after exit command
• Configuration Handling: Fixed parallel config value handling from configuration file
• Security Fixes:
  • Prevented command injection vulnerabilities in ProxyCommand and ControlPath
  • Fixed path traversal attack vulnerabilities in file path handling
  • Prevented environment variable injection attacks
• Localhost Connectivity: Fixed SSH connections to localhost

CI/CD Improvements

• Enhanced release process with automated checks

Technical Details

• Refactored SSH configuration parsing for better modularity
• Implemented comprehensive security improvements for PTY implementation
• Added performance optimizations for I/O operations

Dependencies

• Updated test files to resolve clippy warnings
• Maintained compatibility with existing russh and tokio dependencies

Breaking Changes

None

Known Issues

None

What's Changed

• fix: align interactive mode authentication with exec mode by @inureyes in #17
• fix: use parallel config value from configuration file by @inureyes in #18
• feat: enhance CLI help messages with comprehensive documentation by @inureyes in #19
• feat: show help message when no arguments provided by @inureyes in #20
• feat: add SSH-compatible command-line interface and fix localhost connectivity by @inureyes in #25
• fix: use parallel config value from configuration file by @inureyes in #26
• feat: implement true PTY allocation for interactive SSH sessions by @inureyes in #27
• feat: Add SSH configuration file parsing (-F option) by @inureyes in #28

Full Changelog: v0.5.4...v0.6.0