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rhaj/rhai_system/examples/hot_reload/script.rhai
Timur Gordon 372b7a2772 refactor: Overhaul Rhai scripting with multi-file hot reloading
This commit represents a major refactoring of our Rhai scripting system,
transforming it from a factory-based approach to a more robust system-based
architecture with improved hot reloading capabilities.

Key Changes:
- Renamed package from rhai_factory to rhai_system to better reflect its purpose
- Renamed system_factory.rs to factory.rs for consistency and clarity
- Implemented support for multiple script files in hot reloading
- Added cross-script function calls, allowing functions in one script to call functions in another
- Improved file watching to monitor all script files for changes
- Enhanced error handling for script compilation failures
- Simplified the API with a cleaner create_hot_reloadable_system function
- Removed unused modules (error.rs, factory.rs, hot_reload_old.rs, module_cache.rs, relative_resolver.rs)
- Updated all tests to work with the new architecture

The new architecture:
- Uses a System struct that holds references to script paths and provides a clean API
- Compiles and merges multiple Rhai script files into a single AST
- Automatically detects changes to any script file and recompiles them
- Maintains thread safety with proper synchronization primitives
- Provides better error messages when scripts fail to compile

This refactoring aligns with our BasePathModuleResolver approach for module imports,
making the resolution process more predictable and consistent. The hot reload example
has been updated to demonstrate the new capabilities, showing how to:
1. Load and execute multiple script files
2. Watch for changes to these files
3. Automatically reload scripts when they change
4. Call functions across different script files

All tests are passing, and the example demonstrates the improved functionality.
2025-05-02 21:04:33 +02:00

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// This is a completely overwritten script
// The AST will be replaced with this new version
// A simple greeting function with modified message
fn greet(name) {
"Hello, " + name + "! This is the COMPLETELY OVERWRITTEN script!"
}
// A function to calculate the sum of two numbers
fn add(a, b) {
a + b
}
// A new function added during hot reload
fn multiply(a, b) {
a * b
}
// Another new function added during hot reload
fn divide(a, b) {
a / b
}