argh 命令行参数解析库

https://github.com/google/argh

Rust derive-based argument parsing optimized for code size

基于 rust derive 宏的命令行参数解析库，并专门优化了生成代码的尺寸

faux mock 库

https://github.com/nrxus/faux

宏展开工具 cargo-expand

https://github.com/dtolnay/cargo-expand