crate root (g)

Program entry point and top-level command routing.

Tutorial overview

• main is the required entry point for a Rust binary crate.
• We delegate to [run] so we can return a Result and use ? for ergonomic error propagation.
• The CLI is parsed via clap derive macros into typed enums/structs.
• We then dispatch to feature modules (commands::*) using match.

Rust concepts used here

• Result<T, E> and the ? operator for error propagation.
• Pattern matching (match, if let, while let) to unpack enums/Options.
• Trait objects (&dyn Error) for printing a chain of errors.
• Borrowing and references (&name, &args) to avoid cloning.

Source: src/main.rs