plotters is a Rust data visualization library that provides a high-level API for creating charts and plots. It supports multiple backends (bitmap, SVG, canvas, WASM) via the `DrawingBackend` trait, allowing output to PNG, SVG, GIF, or interactive Jupyter notebooks. The core crate `plotters` offers chart builders, coordinate systems, drawable elements, series, and styles, while backend crates (`plotters-bitmap`, `plotters-svg`) implement the trait. Key entry points include `ChartBuilder`, `DrawingArea`, and backend constructors like `BitMapBackend::new`. Data flows involve user-provided iterators transformed into drawable elements via series (e.g., `LineSeries`, `Histogram`) and rendered to the chosen backend. External dependencies include `image`, `chrono`, `font-kit`, `ab_glyph`, `gif`, and `serde` (optional). The library is designed for embedding in Rust applications, not as a standalone tool, and is actively maintained with extensive examples, benchmarks, and CI.
Specinfra is a Ruby library that provides a common layer for infrastructure testing tools like serverspec and itamae. It offers a unified interface to check system properties (packages, services, files, network configuration, etc.) across diverse operating systems and execution environments. The architecture features a clean separation of concerns: backend abstractions for different execution methods (local, SSH, Docker, WinRM, etc.), a command factory for OS-specific command generation, and modular helpers for system detection and property management. The library dynamically selects the appropriate implementation based on the target system's OS and version, then executes checks via the chosen backend. Key entry points include the main Specinfra module, the Backend system, and the CommandFactory, which together enable extensible infrastructure verification.