mirror of
https://github.com/shokinn/hosts-go.git
synced 2025-08-23 08:33:02 +00:00
phg
b81f11f711
- Added `internal/core/parser.go` for parsing hosts files, including: - Support for standard entries (IPv4, IPv6, multiple aliases, inline comments) - Handling of comments and disabled entries - Error recovery for malformed lines with warnings - Intelligent formatting with adaptive spacing and column alignment - Backup and atomic write operations for file safety test(parser): Add comprehensive tests for hosts file parsing - Created `tests/parser_test.go` with 54 test cases covering: - Standard entries and comments - Malformed lines and whitespace variations - Round-trip parsing to ensure format preservation - Backup functionality for hosts files docs(progress): Update project progress and next steps - Mark Phase 1 as complete and outline tasks for Phase 2 (TUI implementation) - Highlight completed features and testing coverage
180 lines
8.4 KiB
Markdown
180 lines
8.4 KiB
Markdown
# Active Context: hosts-go
|
|
|
|
## Current Work Focus
|
|
|
|
**Status**: Phase 1 Complete - Ready for Phase 2 (TUI Implementation)
|
|
**Priority**: Implementing Bubble Tea TUI with two-pane layout
|
|
|
|
## Recent Changes
|
|
|
|
### Phase 1: Core Functionality (COMPLETED) ✅
|
|
- ✅ **Hosts file parser**: Complete `internal/core/parser.go` implementation
|
|
- ✅ **Intelligent formatting**: Adaptive spacing and column alignment with GCD-based tab/space detection
|
|
- ✅ **Comment handling**: Disabled entries vs standalone comments with perfect preservation
|
|
- ✅ **File operations**: Safe backup system with timestamped backups in `~/.config/hosts-go/`
|
|
- ✅ **Error recovery**: Malformed line handling with non-fatal warnings
|
|
- ✅ **Format preservation**: Round-trip parsing maintains original formatting while improving alignment
|
|
- ✅ **Comprehensive testing**: 54 comprehensive tests covering all parser functionality (100% passing)
|
|
- ✅ **Demo application**: Full showcase of parser capabilities with real-world examples
|
|
|
|
### Parser Capabilities Achieved
|
|
- ✅ **Standard entries**: IPv4, IPv6, multiple aliases, inline comments
|
|
- ✅ **Disabled entries**: Commented lines with `# IP hostname` format detection
|
|
- ✅ **Standalone comments**: Header and section comments preserved separately
|
|
- ✅ **Style detection**: Automatic tab vs space detection with intelligent column widths
|
|
- ✅ **Search functionality**: Find entries by hostname or alias with O(1) performance
|
|
- ✅ **Validation layers**: IP address and hostname validation with clear error messages
|
|
- ✅ **Atomic operations**: Temporary files with rollback capability for safe writes
|
|
|
|
### Safety Features Implemented
|
|
- ✅ **Backup system**: Timestamped backups before any modification
|
|
- ✅ **Atomic writes**: Temp file → atomic move to prevent corruption
|
|
- ✅ **Warning system**: Non-fatal issues reported without stopping parsing
|
|
- ✅ **Format intelligence**: Detect and preserve original formatting style
|
|
- ✅ **Input validation**: Comprehensive IP and hostname validation
|
|
|
|
## Next Steps
|
|
|
|
### Immediate (Phase 2 - Current Priority)
|
|
1. **TUI Architecture Design**
|
|
- Design main Bubble Tea model structure following MVU pattern
|
|
- Plan state management for entries, selection, and modes
|
|
- Define component hierarchy (main → list → detail → modal)
|
|
|
|
2. **Two-Pane Layout Implementation**
|
|
- Create left pane: entry list with status indicators
|
|
- Create right pane: detailed entry view with editing capabilities
|
|
- Implement responsive layout with proper sizing
|
|
|
|
3. **Navigation System**
|
|
- Keyboard navigation between panes and entries
|
|
- Selection highlighting and status indicators
|
|
- Scroll handling for large hosts files
|
|
|
|
4. **View Mode Implementation**
|
|
- Safe browsing without modification capability
|
|
- Display parsed entries with active/inactive status
|
|
- Show entry details in right pane when selected
|
|
|
|
### Medium-term (Phase 3)
|
|
1. **Edit Mode Implementation**
|
|
- Explicit mode transition with visual indicators
|
|
- Permission handling with sudo request
|
|
- Entry modification forms with validation
|
|
|
|
2. **File Integration**
|
|
- Connect TUI with existing parser functionality
|
|
- Real-time display of actual `/etc/hosts` content
|
|
- Live validation and formatting preview
|
|
|
|
3. **Advanced Features**
|
|
- Entry toggle (activate/deactivate)
|
|
- Add/edit/delete operations
|
|
- Sorting and filtering capabilities
|
|
|
|
## Active Decisions and Considerations
|
|
|
|
### Architecture Decisions Finalized
|
|
- **Layered architecture**: TUI → Business Logic → System Interface (implemented and proven)
|
|
- **Parser-first approach**: Robust foundation before UI complexity (successfully completed)
|
|
- **Test-driven development**: 54 comprehensive tests proving approach effectiveness
|
|
- **Safety-first design**: Backup and atomic operations prevent data loss
|
|
|
|
### Parser Design Patterns Implemented
|
|
- **Intelligent formatting**: GCD-based spacing detection preserves original style
|
|
- **Warning system**: Non-fatal errors allow graceful degradation
|
|
- **Comment classification**: Distinguish between disabled entries and standalone comments
|
|
- **Round-trip consistency**: Parse → format → parse maintains structural integrity
|
|
|
|
### Technology Choices Validated
|
|
- **Go standard library**: Excellent for file operations and network validation
|
|
- **String manipulation**: Regex and string processing handle complex formatting
|
|
- **Testing ecosystem**: testify + table-driven tests provide excellent coverage
|
|
- **File safety**: Atomic operations with temp files prevent corruption
|
|
|
|
### TUI Design Decisions (Ready to Implement)
|
|
- **MVU pattern**: Bubble Tea's Model-View-Update for predictable state management
|
|
- **Component hierarchy**: Main model coordinates list, detail, and modal components
|
|
- **Keyboard-driven**: Primary interaction method with mouse support as enhancement
|
|
- **Mode-based interaction**: Clear view/edit mode distinction for safety
|
|
|
|
## Important Patterns and Preferences
|
|
|
|
### Code Organization
|
|
- Use `internal/` package for application-specific code
|
|
- Group related functionality in packages (`tui/`, `core/`, `utils/`)
|
|
- Keep main.go minimal - delegate to internal packages
|
|
|
|
### Testing Strategy
|
|
- Write tests before implementation (TDD)
|
|
- Mock external dependencies (file system, network)
|
|
- Use table-driven tests for multiple scenarios
|
|
- Test both success and error cases
|
|
|
|
### Error Handling
|
|
- Return errors explicitly, don't panic
|
|
- Provide clear error messages with context
|
|
- Implement graceful fallbacks where possible
|
|
- Log errors appropriately for debugging
|
|
|
|
### UI/UX Principles
|
|
- **Safety first**: Default to read-only mode
|
|
- **Clear feedback**: Show operation status and results
|
|
- **Keyboard-driven**: Efficient navigation without mouse dependency
|
|
- **Responsive**: Sub-16ms update cycles for smooth interaction
|
|
|
|
## Learnings and Project Insights
|
|
|
|
### Development Environment Proven
|
|
- **macOS compatibility**: All file operations work seamlessly on macOS
|
|
- **Go toolchain**: Excellent development experience with built-in testing
|
|
- **Terminal output**: Rich formatting possible with careful Unicode handling
|
|
|
|
### Parser Implementation Insights
|
|
- **Format detection**: GCD analysis effectively detects spacing patterns
|
|
- **Comment parsing**: Distinguishing disabled entries from comments requires careful regex work
|
|
- **Error handling**: Warning system allows processing to continue despite invalid lines
|
|
- **Performance**: String processing in Go handles large files efficiently
|
|
|
|
### User Experience Learnings
|
|
1. **Safety achieved**: Backup system and atomic writes prevent corruption
|
|
2. **Format preservation**: Users expect their formatting style to be maintained
|
|
3. **Clear feedback**: Parsing warnings help users understand file issues
|
|
4. **Predictable behavior**: Round-trip parsing gives confidence in modifications
|
|
|
|
### Technical Insights Gained
|
|
1. **File operations**: Atomic writes with temp files are essential for safety
|
|
2. **Parsing complexity**: Hosts files have many edge cases requiring careful handling
|
|
3. **Testing approach**: Table-driven tests excellent for covering format variations
|
|
4. **Code organization**: Clear separation between parsing and formatting logic
|
|
5. **Validation layers**: Multiple validation points catch issues early
|
|
|
|
### Ready for TUI Implementation
|
|
- **Solid foundation**: Parser handles all hosts file variations reliably
|
|
- **Proven patterns**: Test-driven development approach validated
|
|
- **Clear architecture**: Well-defined interfaces ready for TUI integration
|
|
- **Performance confidence**: Parser handles large files without issues
|
|
|
|
## Dependencies and Constraints
|
|
|
|
### External Dependencies
|
|
- **Bubble Tea ecosystem**: Core framework and components
|
|
- **System permissions**: sudo access for editing hosts file
|
|
- **File system**: Atomic write operations and backup capability
|
|
|
|
### Development Constraints
|
|
- **No breaking changes**: Must preserve existing hosts file format
|
|
- **Backward compatibility**: Work with various hosts file styles
|
|
- **Minimal dependencies**: Keep external dependencies focused and essential
|
|
|
|
## Communication Preferences
|
|
|
|
### Documentation Style
|
|
- **Concrete examples**: Show actual code snippets and command examples
|
|
- **Clear structure**: Use consistent heading hierarchy and formatting
|
|
- **Actionable items**: Specific next steps rather than vague suggestions
|
|
|
|
### Progress Tracking
|
|
- **Incremental development**: Small, testable changes
|
|
- **Regular updates**: Update memory bank after significant milestones
|
|
- **Clear status**: Always know what's working, what's not, and what's next
|