💻 CLI Implementation

Content Outline

Comprehensive guide to PyMapGIS command-line interface implementation using Typer:

1. CLI Architecture

• Typer framework integration and benefits
• Command structure and organization
• Plugin-based command extension
• Configuration and settings integration
• Error handling and user feedback

2. Core Commands

• pymapgis info: System and installation information
• pymapgis cache: Cache management operations
• pymapgis rio: Rasterio CLI passthrough
• pymapgis serve: Web service management
• pymapgis config: Configuration management

3. Command Implementation Details

• Command registration and discovery
• Argument parsing and validation
• Option handling and defaults
• Subcommand organization
• Help system and documentation

4. User Experience Design

• Intuitive command structure
• Consistent option naming
• Rich output formatting
• Progress indicators and feedback
• Error messages and suggestions

5. Configuration Integration

• Settings access from CLI
• Environment variable handling
• Configuration file integration
• Runtime configuration updates
• Validation and error handling

6. Output Formatting

• Rich text formatting and styling
• Table and list formatting
• JSON and structured output
• Quiet and verbose modes
• Color and styling options

7. Interactive Features

• Interactive prompts and confirmations
• Menu-driven interfaces
• Wizard-style command flows
• Auto-completion support
• Shell integration

8. Plugin System Integration

• Plugin command registration
• Dynamic command discovery
• Plugin-specific options
• Plugin help integration
• Plugin error handling

9. Testing and Quality Assurance

• CLI testing strategies
• Command output validation
• Integration testing
• User acceptance testing
• Cross-platform compatibility

10. Performance Considerations

• Command startup time optimization
• Lazy loading for heavy operations
• Progress tracking for long operations
• Memory usage optimization
• Parallel command execution

11. Documentation and Help

• Built-in help system
• Command documentation generation
• Usage examples and tutorials
• Man page generation
• Online documentation integration

12. Advanced Features

• Shell completion scripts
• Command aliasing and shortcuts
• Batch command execution
• Configuration profiles
• Remote command execution

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This guide will provide detailed information on CLI implementation, user experience design, and best practices for command-line interfaces in PyMapGIS.