Chapter 5: Command-line, Data, and Systems Programming with Rust
Rust excels where binaries must start fast, fail clearly, and interoperate with the outside world. Here you will craft ergonomic CLIs, persist structured data through Diesel-powered workflows, and—when necessary—cross the boundary into unsafe code and FFI while respecting invariants the compiler cannot enforce for you.
Treat each series as a toolkit: automation-friendly CLIs feed databases, and disciplined unsafe glue connects legacy systems without surrendering Rust's guarantees elsewhere.