src/ch14-05-extending-cargo.md
Cargo is designed so that you can extend it with new subcommands without having
to modify it. If a binary in your $PATH is named cargo-something, you can
run it as if it were a Cargo subcommand by running cargo something. Custom
commands like this are also listed when you run cargo --list. Being able to
use cargo install to install extensions and then run them just like the
built-in Cargo tools is a super-convenient benefit of Cargo’s design!
Sharing code with Cargo and crates.io<!-- ignore --> is part of what makes the Rust ecosystem useful for many different tasks. Rust’s standard library is small and stable, but crates are easy to share, use, and improve on a timeline different from that of the language. Don’t be shy about sharing code that’s useful to you on crates.io<!-- ignore -->; it’s likely that it will be useful to someone else as well!