How to Build a CLI Tool with Rust: Step-by-Step Tutorial

This tutorial walks through building a complete CLI tool in Rust called fxr, covering argument parsing with clap, error handling, JSON/YAML processing, progress bars, testing, and cross-compilation. Rust is highlighted as the ideal language for CLI tools due to instant startup time, single binary distribution, memory safety without a garbage collector, and a mature ecosystem of purpose-built crates.