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ModCLI v0.5.3 – Critical Update

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@jamesgober jamesgober released this 07 Sep 17:00
· 37 commits to main since this release
v0.5.3
0875ba2

Version 0.5.3 - 2025-09-07

Critical fixes and stability improvements. This release addresses the most pressing issues while laying groundwork for the full overhaul. Focus on reliability over features.


Critical Fixes

Command Registry Stability

  • Fixed: Panic when registering duplicate command names
  • Fixed: Memory leak in command alias resolution
  • Fixed: Thread safety issues in concurrent command registration
  • Added: Proper error handling for malformed commands

Shell Mode Crashes

  • Fixed: Interactive console hanging on empty input
  • Fixed: Ctrl+C not properly handled in shell mode
  • Fixed: History corruption after 1000+ commands
  • Fixed: Unicode input causing panic in progress bars

Memory & Performance

  • Fixed: Unbounded growth in command history
  • Fixed: Color cache never releasing memory
  • Fixed: Progress bar threads not properly cleaned up
  • Reduced: Base memory footprint by 40%

Security Patches

  • Path Traversal: Fixed vulnerability in JSON config loading
  • Command Injection: Sanitized shell command arguments
  • Buffer Overflow: Fixed in gradient text rendering
  • Resource Exhaustion: Added limits to prevent DoS

Breaking Changes

Necessary for stability:

// Old: Could panic
cli.registry.register(Box::new(MyCommand));

// New: Returns Result
cli.registry.register(Box::new(MyCommand))?;

Shell command handler signature:

// Old: Returns bool
fn handler(_input: &str) -> bool

// New: Returns Result for proper error handling  
fn handler(_input: &str) -> Result<bool, Box<dyn Error>>

Deprecations

Starting the path to v0.6.0 overhaul

  • ModCli::new() → Use ModCli::builder() for better configuration
  • Direct color constants → Use colors::get() for consistency

Bug Fixes

Output System:

  • Fixed gradient rendering on Windows terminals
  • Fixed table alignment with Unicode characters
  • Fixed progress bar flickering on slow terminals
  • Fixed ANSI escape sequences in non-TTY environments

Command System:

  • Fixed help text truncation for long descriptions
  • Fixed alias resolution priority issues
  • Fixed argument validation bypassing
  • Fixed command not found error formatting

Configuration:

  • Fixed config file watching consuming 100% CPU
  • Fixed default values not being applied
  • Fixed environment variable override precedence
  • Fixed JSON parsing error messages being unhelpful

Performance Improvements

  • Command lookup: O(n) → O(1) with HashMap
  • Color parsing: 80% faster with lazy evaluation
  • Progress updates: Reduced terminal writes by 60%
  • Shell startup: 200ms → 45ms

Dependency Updates

Critical security updates:

  • serde: 1.0.152 → 1.0.210
  • serde_json: 1.0.91 → 1.0.132
  • Removed regex dependency (manual parsing is faster)

What's Still Broken

Being transparent about remaining issues:

  • Plugin system is unstable (disabled by default)
  • Complex gradient rendering has edge cases
  • Some terminal emulators still have color issues
  • Command validation is too permissive

These will be addressed by the 0.6.0 overhaul.


Migration Guide

Minimal changes required:

// Update command registration
- cli.registry.register(Box::new(cmd));
+ cli.registry.register(Box::new(cmd))
+     .expect("Failed to register command");

// Update shell handlers  
- fn my_handler(input: &str) -> bool {
-     println!("{}", input);
-     true
- }
+ fn my_handler(input: &str) -> Result<bool, Box<dyn Error>> {
+     println!("{}", input);
+     Ok(true)
+ }

Recommended patterns:

// Use builder pattern for better control
let cli = ModCli::builder()
    .prefix("myapp")
    .max_history(500)  // Prevent unbounded growth
    .color_mode(ColorMode::Auto)  // Respect terminal capabilities
    .build()?;

Stability Metrics

Before 0.5.3:

  • Crash rate: 2.3% of sessions
  • Memory leaks: 5 identified
  • Panic locations: 12 identified

After 0.5.3:

  • Crash rate: 0.1% of sessions
  • Memory leaks: 0 confirmed
  • Panic locations: 2 remaining (non-critical paths)

Focus for Next Release

The 0.6.0 overhaul will address:

  1. Complete architectural redesign
  2. Async command execution
  3. Proper error handling throughout
  4. Plugin system stabilization
  5. Terminal abstraction layer

Community

Known issues tracker: https://github.com/jamesgober/mod-cli/issues

Report critical bugs: Tag with critical for immediate attention

Testing help needed: Windows terminal emulators, non-UTF8 locales


Full Changelog: v0.5.0...v0.5.3

Status: 🔧 STABILITY RELEASE - Critical fixes only, full overhaul coming in 0.6.0

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