The rustup team is happy to announce the release of rustup version 1.28.2. Rustup is the recommended tool to install Rust, a programming language that empowers everyone to build reliable and efficient software.

What's new in rustup 1.28.2

The headlines of this release are:

• The cURL download backend and the native-tls TLS backend are now officially deprecated and a warning will start to show up when they are used. pr#4277

  • While rustup predates reqwest and rustls, the rustup team has long wanted to standardize on an HTTP + TLS stack with more components in Rust, which should increase security, potentially improve performance, and simplify maintenance of the project. With the default download backend already switched to reqwest since 2019, the team thinks it is time to focus maintenance on the default stack powered by these two libraries.

  • For people who have set RUSTUP_USE_CURL=1 or RUSTUP_USE_RUSTLS=0 in their environment to work around issues with rustup, please try to unset these after upgrading to 1.28.2 and file an issue if you still encounter problems.

• The version of rustup can be pinned when installing via rustup-init.sh, and rustup self update can be used to upgrade/downgrade rustup 1.28.2+ to a given version. To do so, set the RUSTUP_VERSION environment variable to the desired version (for example 1.28.2). pr#4259

• rustup set auto-install disable can now be used to disable automatic installation of the toolchain. This is similar to the RUSTUP_AUTO_INSTALL environment variable introduced in 1.28.1 but with a lower priority. pr#4254

• Fixed a bug in Nushell integration that might generate invalid commands in the shell configuration. Reinstalling rustup might be required for the fix to work. pr#4265

How to update

If you have a previous version of rustup installed, getting the new one is as easy as stopping any programs which may be using rustup (e.g. closing your IDE) and running:

$ rustup self update

Rustup will also automatically update itself at the end of a normal toolchain update:

$ rustup update

If you don't have it already, you can get rustup from the appropriate page on our website.

Rustup's documentation is also available in the rustup book.

Caveats

Rustup releases can come with problems not caused by rustup itself but just due to having a new release.

In particular, anti-malware scanners might block rustup or stop it from creating or copying files, especially when installing rust-docs which contains many small files.

Issues like this should be automatically resolved in a few weeks when the anti-malware scanners are updated to be aware of the new rustup release.

Thanks

Thanks again to all the contributors who made this rustup release possible!