For more on creating a custom subcommand, see [the cargo book](https://doc.rust-lang.org/cargo/reference/external-tools.html#custom-subcommands). The crate [`clap-cargo`](https://github.com/crate-ci/clap-cargo) can help in mimicking cargo's interface. The help looks like: ```console $ cargo-example --help cargo USAGE: cargo OPTIONS: -h, --help Print help information SUBCOMMANDS: example A simple to use, efficient, and full-featured Command Line Argument Parser help Print this message or the help of the given subcommand(s) $ cargo-example example --help cargo-example [..] A simple to use, efficient, and full-featured Command Line Argument Parser USAGE: cargo example [OPTIONS] OPTIONS: -h, --help Print help information --manifest-path -V, --version Print version information ``` Then to directly invoke the command, run: ```console $ cargo-example example None $ cargo-example example --manifest-path Cargo.toml Some("Cargo.toml") ```