The Rust toolchain installer
Rustup is the official Rust toolchain installer that enables users to install The Rust Programming Language from official release channels and easily switch between stable, beta, and nightly compiler versions while keeping them updated. The project simplifies cross-compilation by providing binary builds of the standard library for common platforms and runs on all platforms that Rust supports, including Windows. Rustup is built in Rust and uses GitHub Actions for continuous integration across multiple tier 1 and tier 2 platforms, with documentation generated using mdBook. The project is maintained by Diggory Blake, the Mozilla Corporation, and Rustup contributors, and is licensed under either the Apache License 2.0 or MIT license.