$ show brndnmtthws/conky
Conky is a free, lightweight system monitor for X11, Wayland, and macOS that displays system information on the desktop or in alternative output modes (console, file, HTTP). It collects data from /proc, /sys, sysctl, and various APIs to report CPU, memory, disk, network, processes, sensors, audio players, mail, RSS, and more. The architecture is modular: data sources are registered as text objects with scan/print/free callbacks, output backends are selected at runtime (X11, Wayland, ncurses, console, file, HTTP), and Lua scripting provides configuration and extensibility via tolua++ generated bindings. A callback system handles periodic data fetching with deduplication and thread safety, and a priority queue supports top process sorting. The codebase is written in C++ with some C, uses CMake build system, and includes a comprehensive test suite using Catch2. It supports Linux, BSDs, Haiku, Solaris, and macOS with platform-specific backends. The project demonstrates several well-crafted reusable components: a generic priority queue, a callback system for periodic tasks, a typed configuration settings framework with Lua integration, a structured logging wrapper around spdlog, and a macro-generated X11 event variant pattern. These components exhibit non-obvious skill and can be extracted for use in other C++ projects. However, the codebase also shows signs of technical drift with bundled third-party libraries (Vc, tolua++, spdlog) that may lag behind upstream, and some platform-specific backends have incomplete implementations.
The LLM identified 5 files worth highlighting for reuse:
A generic priority queue implementation with custom compare and free callbacks, used for sorting top processes by CPU, memory, or I/O. It is self-contained and can be extracted for any project needing a flexible priority queue with user-defined ordering and cleanup.
A generic callback registration and execution system for periodic data fetching. Supports deduplication by key, period merging, thread-safe result storage with mutex, and done signalling. Used for background tasks like RSS fetching, mail checking, and audio player status. Can be extracted for any application needing periodic background tasks with result caching.
A typed configuration settings framework with Lua getter/setter support, deprecation warnings, aliases, and type conversion traits. Settings are declared declaratively with simple_config_setting or range_config_setting and automatically exposed to Lua. This pattern is reusable for any C++ application that wants Lua-driven configuration with validation and migration support.
A structured logging wrapper around spdlog that adds span context, per-message attributes, source location, and custom flag formatters. Provides macros for different log levels and a span guard for automatic scope logging. Can be extracted as a reusable logging utility for C++ projects needing structured logging with minimal boilerplate.
A macro-generated variant type that wraps X11 and XInput2 events into typed C++ structs with downcast helpers and window listener/subject traversal. Demonstrates a pattern for type-safe event handling in C using macros and std::variant. Could be adapted for other event-driven systems that need to dispatch heterogeneous events.