clish

The most elegant CLI framework for Rust. Annotate a function, ship a CLI.

#[command]
fn install( package: Pos<String>, version: Named<Option<String>>, force: bool ) { ... }

Get Started Codeberg crates.io

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Easy API

Annotate a function with #[command] and you have a CLI. Argument types determine parsing automatically.

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Powerful & Flexible

Positional, named, variadic, repeatable, optional. Short flags, bundled flags, env fallbacks, defaults, value choices, and so much more.

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Supreme Customizability

Style every element of help and error output with farben markup or anstyle. Command aliases, hidden commands, deprecation.

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Compile-Time Safety

Invalid type combinations and duplicate short flags are caught at compile time. No runtime surprises.