Function print_usage

perro_source/devtools/perro_cli/src/main.rs:94–150

()

            "clippy" => clippy_command(&args, &cwd),
            _ => {
                print_usage();
                Err(format!("unknown command `{command}`"))
            }
        }
    };

    if let Err(err) = result {
        eprintln!("{err}");
        std::process::exit(1);
    }
}

#[derive(Clone, Copy)]
enum FlagArity {
    Switch,
    Value,
    OptionalValue,
}

#[derive(Clone, Copy)]
struct FlagSpec {
    name: &'static str,
    arity: FlagArity,
}

const fn switch(name: &'static str) -> FlagSpec {
    FlagSpec {
        name,
        arity: FlagArity::Switch,
    }
}

const fn value(name: &'static str) -> FlagSpec {
    FlagSpec {
        name,
        arity: FlagArity::Value,
    }
}

const fn optional_value(name: &'static str) -> FlagSpec {
    FlagSpec {
        name,
        arity: FlagArity::OptionalValue,
    }
}

const PATH: &[FlagSpec] = &[value("--path")];
const NEW: &[FlagSpec] = &[value("--path"), value("--name")];
const NEW_DLC: &[FlagSpec] = &[value("--path"), value("--name"), switch("--no-open")];
const NEW_SCRIPT: &[FlagSpec] = &[
    value("--path"),
    value("--name"),
    value("--res"),
    value("--dlc"),
    switch("--no-open"),
];
const NEW_SCENE: &[FlagSpec] = &[
    value("--path"),