# Python Umbrel Linter - Feature Suggestions

This document outlines potential new features and enhancements that can be added to the Python Umbrel linter to make it even more powerful and developer-friendly.

## 🚀 High Priority Features

### 1. Auto-Fix Functionality (`--fix`)
**Priority**: HIGH | **Effort**: MEDIUM | **Impact**: HIGH

Add an `--fix` flag that automatically fixes common linting errors that can be safely corrected.

#### Auto-Fixable Issues:
- **Empty Directories**: Automatically create `.gitkeep` files
- **YAML Formatting**: Fix indentation and formatting issues
- **Boolean Values**: Convert `true`/`false` to `"true"`/`"false"` in Docker Compose
- **Missing Environment Variables**: Add default values for common variables
- **Port Conflicts**: Suggest alternative ports when conflicts are detected
- **Image Tag Updates**: Update `latest` tags to specific versions
- **File Permissions**: Fix file permissions for mounted volumes

#### Implementation:
```bash
# Auto-fix all fixable issues
umbrel-linter lint /path/to/app --fix

# Auto-fix with dry-run to see what would be changed
umbrel-linter lint /path/to/app --fix --dry-run

# Auto-fix specific error types
umbrel-linter lint /path/to/app --fix --fix-types empty_directories,boolean_values
```

### 2. Interactive Mode (`--interactive`)
**Priority**: HIGH | **Effort**: MEDIUM | **Impact**: HIGH

Add an interactive mode that guides users through fixing issues step by step.

#### Features:
- **Step-by-step Fixes**: Walk through each error with explanations
- **Smart Suggestions**: Provide intelligent recommendations
- **Undo Capability**: Allow users to undo changes
- **Preview Changes**: Show what will be changed before applying

#### Implementation:
```bash
# Interactive mode
umbrel-linter lint /path/to/app --interactive

# Interactive mode with specific app
umbrel-linter lint /path/to/app --app my-app --interactive
```

### 3. Configuration File Support
**Priority**: HIGH | **Effort**: LOW | **Impact**: MEDIUM

Add support for configuration files to customize linting behavior.

#### Configuration Options:
```yaml
# .umbrel-linter.yml
lint:
  rules:
    # Enable/disable specific rules
    docker_socket_mount: warning
    latest_tag: error
    empty_directories: error
    
  # Custom validation rules
  custom_rules:
    - name: "custom_port_range"
      severity: "warning"
      message: "Ports should be in range 8000-9000"
      
  # Auto-fix settings
  auto_fix:
    enabled: true
    create_gitkeep: true
    fix_boolean_values: true
    
  # GitHub integration
  github:
    validate_prs: true
    validate_repos: true
    timeout: 5.0
    
  # Architecture checking
  architectures:
    check_on_demand: true
    supported_archs: ["arm64", "amd64"]
```

## 🔧 Developer Experience Features

### 4. IDE Integration
**Priority**: MEDIUM | **Effort**: HIGH | **Impact**: HIGH

Create IDE extensions and language server support for real-time linting.

#### IDE Support:
- **VS Code Extension**: Real-time linting with inline errors
- **Language Server Protocol**: Support for any LSP-compatible editor
- **Vim/Neovim Plugin**: Integration with popular editors
- **Sublime Text Package**: Support for Sublime Text users

#### Features:
- **Real-time Validation**: Show errors as you type
- **Quick Fixes**: Inline fix suggestions
- **Hover Information**: Detailed explanations on hover
- **Auto-completion**: Suggest valid values for fields

### 5. Template Generation (`--init`)
**Priority**: MEDIUM | **Effort**: MEDIUM | **Impact**: MEDIUM

Add template generation for new Umbrel apps.

#### Templates:
```bash
# Generate a new app template
umbrel-linter init my-new-app --template basic

# Generate with specific category
umbrel-linter init my-new-app --template database --category developer

# Generate with all files
umbrel-linter init my-new-app --template complete
```

#### Template Types:
- **Basic**: Minimal app structure
- **Database**: App with database integration
- **Web**: Web application template
- **API**: API service template
- **Complete**: Full-featured app with all components

### 6. Migration Assistant (`--migrate`)
**Priority**: MEDIUM | **Effort**: HIGH | **Impact**: MEDIUM

Help migrate apps between Umbrel versions and update deprecated features.

#### Migration Features:
- **Version Migration**: Update manifest versions
- **Deprecation Warnings**: Identify deprecated features
- **Automatic Updates**: Update to newer patterns
- **Backup Creation**: Create backups before migration

```bash
# Migrate app to newer version
umbrel-linter migrate /path/to/app --to-version 1.2

# Check what would be migrated
umbrel-linter migrate /path/to/app --dry-run

# Migrate with backup
umbrel-linter migrate /path/to/app --backup --to-version 1.2
```

## 📊 Analytics and Reporting

### 7. Advanced Reporting (`--report`)
**Priority**: LOW | **Effort**: MEDIUM | **Impact**: MEDIUM

Generate detailed reports and analytics about app quality.

#### Report Types:
- **Quality Report**: Overall app quality score
- **Security Report**: Security vulnerability analysis
- **Performance Report**: Performance recommendations
- **Compliance Report**: Umbrel guidelines compliance

```bash
# Generate comprehensive report
umbrel-linter lint /path/to/app --report --format html

# Generate security report
umbrel-linter lint /path/to/app --report --type security

# Generate report for entire app store
umbrel-linter lint /path/to/app-store --report --store-analysis
```

### 8. Continuous Integration Support
**Priority**: MEDIUM | **Effort**: LOW | **Impact**: HIGH

Enhanced CI/CD integration with GitHub Actions, GitLab CI, and other platforms.

#### CI Features:
- **GitHub Actions**: Pre-configured workflows
- **GitLab CI**: GitLab integration
- **Jenkins**: Jenkins pipeline support
- **Custom CI**: Generic CI/CD integration

#### GitHub Actions Example:
```yaml
name: Umbrel Linter
on: [pull_request]
jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: umbrel/linter-action@v1
        with:
          path: './apps'
          check-architectures: true
          auto-fix: true
          report-format: 'json'
```

## 🔍 Advanced Validation Features

### 9. Custom Rule Engine
**Priority**: LOW | **Effort**: HIGH | **Impact**: MEDIUM

Allow users to define custom validation rules.

#### Custom Rules:
```python
# Custom rule example
@custom_rule("port_range")
def validate_port_range(manifest, context):
    port = manifest.get("port")
    if port and not (8000 <= port <= 9000):
        return LintingError(
            id="custom_port_range",
            severity=Severity.WARNING,
            title="Port outside recommended range",
            message="Ports should be between 8000-9000"
        )
    return None
```

### 10. Dependency Analysis
**Priority**: LOW | **Effort**: MEDIUM | **Impact**: LOW

Analyze dependencies and suggest optimizations.

#### Features:
- **Dependency Tree**: Visualize app dependencies
- **Version Conflicts**: Detect version conflicts
- **Security Vulnerabilities**: Check for known vulnerabilities
- **Optimization Suggestions**: Suggest dependency optimizations

### 11. Performance Profiling
**Priority**: LOW | **Effort**: HIGH | **Impact**: LOW

Profile app performance and suggest optimizations.

#### Features:
- **Resource Usage**: Analyze CPU, memory, disk usage
- **Startup Time**: Measure app startup performance
- **Image Size**: Analyze Docker image sizes
- **Network Usage**: Monitor network requirements

## 🛠️ Developer Tools

### 12. Debug Mode (`--debug`)
**Priority**: MEDIUM | **Effort**: LOW | **Impact**: MEDIUM

Enhanced debugging capabilities for developers.

#### Debug Features:
- **Verbose Output**: Detailed logging information
- **Step-by-step Execution**: Show validation steps
- **Timing Information**: Performance metrics
- **Memory Usage**: Monitor memory consumption

```bash
# Debug mode with verbose output
umbrel-linter lint /path/to/app --debug --verbose

# Debug specific validation
umbrel-linter lint /path/to/app --debug --validate docker-compose
```

### 13. Plugin System
**Priority**: LOW | **Effort**: HIGH | **Impact**: MEDIUM

Allow third-party plugins to extend linter functionality.

#### Plugin Features:
- **Custom Validators**: Add new validation rules
- **Custom Fixes**: Implement custom auto-fix logic
- **Custom Reports**: Generate custom reports
- **Integration Hooks**: Integrate with external tools

#### Plugin Example:
```python
# Example plugin
class SecurityPlugin:
    def validate_security(self, manifest):
        # Custom security validation
        pass
    
    def fix_security_issues(self, manifest):
        # Auto-fix security issues
        pass
```

## 🌐 Integration Features

### 14. Multi-Platform Support
**Priority**: LOW | **Effort**: MEDIUM | **Impact**: MEDIUM

Support for multiple platforms and architectures.

#### Platform Support:
- **Windows**: Native Windows support
- **macOS**: macOS optimization
- **Linux**: Enhanced Linux support
- **Docker**: Containerized execution
- **CI/CD**: Cloud-based execution

### 15. API Server Mode
**Priority**: LOW | **Effort**: MEDIUM | **Impact**: LOW

Run linter as a web service for integration with other tools.

#### API Features:
- **REST API**: HTTP-based linting
- **WebSocket**: Real-time validation
- **Authentication**: Secure API access
- **Rate Limiting**: Prevent abuse

```bash
# Start API server
umbrel-linter serve --port 8080 --host 0.0.0.0

# Use API
curl -X POST http://localhost:8080/lint \
  -H "Content-Type: application/json" \
  -d '{"path": "/path/to/app", "options": {"check_architectures": true}}'
```

## 📈 Monitoring and Metrics

### 16. Metrics Collection
**Priority**: LOW | **Effort**: MEDIUM | **Impact**: LOW

Collect and analyze linting metrics.

#### Metrics:
- **Error Frequency**: Track common errors
- **Fix Success Rate**: Monitor auto-fix effectiveness
- **Performance Metrics**: Track validation speed
- **Usage Statistics**: Understand user patterns

### 17. Telemetry and Analytics
**Priority**: LOW | **Effort**: LOW | **Impact**: LOW

Optional telemetry for improving the linter.

#### Features:
- **Anonymous Usage Data**: Help improve the tool
- **Error Reporting**: Report bugs automatically
- **Performance Data**: Optimize based on usage
- **Feature Usage**: Understand which features are popular

## 🎯 Implementation Roadmap

### Phase 1 (Immediate - 1-2 months)
1. **Auto-Fix Functionality** (`--fix`)
2. **Configuration File Support**
3. **Debug Mode** (`--debug`)

### Phase 2 (Short-term - 3-6 months)
1. **Interactive Mode** (`--interactive`)
2. **Template Generation** (`--init`)
3. **Enhanced Reporting** (`--report`)

### Phase 3 (Medium-term - 6-12 months)
1. **IDE Integration**
2. **Migration Assistant** (`--migrate`)
3. **CI/CD Enhancements**

### Phase 4 (Long-term - 12+ months)
1. **Custom Rule Engine**
2. **Plugin System**
3. **API Server Mode**

## 💡 Quick Wins

These features can be implemented quickly for maximum impact:

1. **Auto-Fix for Empty Directories**: Create `.gitkeep` files automatically
2. **Boolean Value Fixing**: Convert boolean values to strings
3. **Configuration File**: Simple YAML configuration
4. **Better Error Messages**: Improve existing error formatting
5. **Progress Indicators**: Show validation progress for large app stores

## 🔧 Technical Considerations

### Performance
- **Parallel Processing**: Validate multiple apps simultaneously
- **Caching**: Cache validation results
- **Incremental Validation**: Only validate changed files
- **Memory Optimization**: Efficient memory usage for large app stores

### Security
- **Sandboxing**: Run validation in isolated environments
- **Input Validation**: Validate all inputs thoroughly
- **Permission Checks**: Ensure proper file permissions
- **Network Security**: Secure API communications

### Maintainability
- **Modular Architecture**: Keep features separate and testable
- **Comprehensive Testing**: Unit, integration, and end-to-end tests
- **Documentation**: Keep documentation up to date
- **Backward Compatibility**: Maintain compatibility with existing usage

This roadmap provides a clear path for enhancing the Python Umbrel linter with powerful new features while maintaining its core functionality and ease of use.
