flutter_quality_lints 0.9.1

A comprehensive linting package for Flutter projects with performance, security, architecture, and accessibility rules plus advanced CLI analysis tools.

Changelog

All notable changes to this project will be documented in this file.

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

[0.9.1] - 2025-01-28

Added

• Auto-Fix Engine: Automatic code correction engine with 6 intelligent fix types
• CLI fix command: New command for applying automatic code corrections
  • Dry-run mode to preview changes without applying them
  • Processing of individual files or complete directories
  • Automatic filtering of generated files
• Programmatic API for Auto-Fix Engine integration in custom tools
• Complete example of Auto-Fix Engine usage in example/auto_fix_example.dart

Available Auto-Fixes

1. AddConstToWidgetFix: Adds const to widget constructors when possible
2. AddTrailingCommaFix: Adds trailing commas for better code formatting
3. ConvertToStatelessWidgetFix: Converts StatefulWidget to StatelessWidget when appropriate
4. AddMountedCheckFix: Adds mounted checks after async operations
5. SimplifyConditionalFix: Simplifies nested conditionals (prepared for expansion)
6. RemoveMagicNumberFix: Extracts magic numbers to constants (prepared for expansion)

Improved

• Updated documentation with Auto-Fix Engine usage examples
• Enhanced CLI with new command and advanced options
• Fixed example with explicit types and better logging practices

Technical

• Syntactic analysis before applying corrections
• Safe processing with file validation
• Detailed metrics of fixes applied per file
• Complete integration with existing linting system

[0.9.0] - 2025-01-28

Added

New Rule Categories

• Flutter Performance Rules (4 new rules):

  • prefer_slivers_over_columns - Optimizes scrolling performance for long lists
  • avoid_widget_rebuilds - Detects unnecessary widget rebuilds
  • prefer_stateless_widgets - Suggests StatelessWidget when appropriate
  • avoid_build_context_across_async - Prevents common async context errors

• Architecture Rules (1 new rule):

  • enforce_layer_dependencies - Validates clean architecture layer dependencies

• Security Rules (1 new rule):

  • avoid_hardcoded_secrets - Detects API keys, passwords, and other secrets

Advanced CLI Tool

• Comprehensive analysis engine with quality scoring (0-10.0 scale)
• Performance profiling: widget tree analysis, memory leak detection, rebuild detection
• Security scanning: secret detection, vulnerability assessment, input validation checking
• Accessibility compliance: WCAG 2.1 AA validation, semantic labels, color contrast
• Report generation: HTML, JSON, and Markdown formats with interactive features
• Auto-Fix Engine: Automatic code correction with 6 intelligent fixes

Enhanced Configuration

• Rule presets: basicRules, recommendedRules, strictRules, performanceRules, securityRules
• Native analysis_options.yaml integration
• Advanced rule configuration with customizable parameters
• Support for rule-specific settings and exclusions

CLI Commands

• analyze - Comprehensive code quality analysis
• performance - Performance bottleneck detection and widget optimization
• optimize - Code optimization suggestions with auto-fix capabilities
• security - Security vulnerability scanning and secret detection
• accessibility - WCAG compliance checking and usability validation
• report - Interactive report generation in multiple formats
• fix - Automatic code fixing with dry-run mode and selective application

Changed

• Reorganized rule structure into logical categories (Core, Performance, Architecture, Security)
• Improved rule execution performance and memory usage
• Enhanced error messages with actionable suggestions
• Updated documentation with comprehensive examples and integration guides

Improved

• Quality scoring algorithm with detailed metrics
• Analysis accuracy with reduced false positives
• Better handling of complex Flutter/Dart patterns
• Cross-platform compatibility

Configuration

• Configurable method length limits (default: 50 lines)
• Customizable magic number allowlists
• Adjustable conditional nesting depth limits
• Widget count thresholds for performance rules
• Layer dependency mapping for architecture validation
• Secret detection patterns and safe value filtering

Statistics

• Total rules: 13 comprehensive linting rules
• Rule categories: 4 distinct categories (Core, Performance, Architecture, Security)
• CLI commands: 6 specialized analysis commands
• Configuration options: 20+ customizable parameters
• Test coverage: Complete unit test suite
• Documentation: Comprehensive with examples and integration guides

[0.0.1] - 2025-01-15

Added

• Initial release of Flutter Quality Lints package
• Core linting rules (7 rules):
  • avoid_empty_catch_blocks - Prevents silent error handling
  • avoid_long_methods - Enforces method length limits
  • avoid_magic_numbers - Requires constants for hardcoded numbers
  • avoid_nested_conditionals - Limits conditional nesting depth
  • prefer_early_return - Encourages guard clauses and early returns
  • prefer_single_widget_per_file - Promotes better code organization
  • prefer_trailing_commas - Ensures consistent code formatting

Features

• Custom lint integration with Flutter/Dart analyzer
• Flexible rule configuration system
• Rule categorization and preset configurations
• Comprehensive error messages with improvement suggestions
• Easy installation and setup process
• Complete documentation with usage examples

Technical Implementation

• Base LintRule class for consistent rule implementation
• AST (Abstract Syntax Tree) analysis for accurate code inspection
• Integration with custom_lint package for seamless IDE support
• Comprehensive test suite with 100% coverage
• Modular architecture for easy rule addition and maintenance