$ show nunomaduro/collision
Collision is a PHP library that provides beautiful error reporting for CLI applications, particularly integrated with Laravel, PHPUnit, and Pest. It wraps the Whoops error handler to render exceptions with syntax-highlighted code snippets, stack traces, and solution suggestions. Additionally, it includes a custom PHPUnit/Pest test printer that outputs test results with color-coded summaries, warnings, and slow-test profiling. The library is built on top of Symfony Console, Termwind, and Whoops, and is designed as a drop-in replacement for default error handling in Laravel's artisan commands and PHPUnit test runners. The codebase is well-structured with clear separation of concerns: core error rendering (Provider, Handler, Writer), terminal styling (ConsoleColor, Highlighter), argument formatting (ArgumentFormatter), code coverage reporting (Coverage), and framework-specific adapters (Laravel service provider, PHPUnit event subscribers). The PHPUnit adapter demonstrates advanced event-driven architecture by hooking into PHPUnit's event system to produce a rich, compact test output.
The LLM identified 5 files worth highlighting for reuse:
A self-contained utility class that formats function arguments for display. It handles strings (with truncation), arrays (associative detection), and objects (class name). The logic is clean, uses a switch statement, and respects a maximum string length. This can be extracted and reused in any PHP CLI tool that needs to pretty-print argument lists.
A standalone terminal color management class that supports 256 colors, custom themes, and style forcing. It provides methods to apply styles to text, manage themes, and detect terminal capabilities. The implementation is robust, handles edge cases (Windows, no TTY), and is fully testable. This is a high-quality reusable component for any PHP CLI application needing colored output.
A PHP syntax highlighter that tokenizes source code and applies color themes to produce highlighted code snippets. It supports line numbers, a marker for the current line, and configurable themes. The implementation uses PHP's token_get_all and handles various token types. This component is self-contained (depends only on ConsoleColor) and can be reused in any PHP tool that needs to display code snippets with syntax highlighting.
A small interface that allows exceptions to provide a custom frame for the Collision editor. It defines a single method `toCollisionEditor(): Frame`. This is a clean contract that enables extensibility without coupling to the rendering logic. It can be reused in other error handling libraries that want to allow custom editor frames.
A marker interface that, when implemented by an exception, suppresses the editor (code snippet) display in Collision's output. This is a simple yet powerful pattern for controlling rendering behavior without modifying the core writer. It demonstrates the use of marker interfaces for feature toggling and can be reused in similar rendering systems.