posts: announce rustup 1.28.2

content/Rustup-1.28.2.md

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+path = "2025/05/05/Rustup-1.28.2"
+title = "Announcing rustup 1.28.2"
+authors = ["The Rustup Team"]
+aliases = ["2025/05/05/Rustup-1.28.2.html"]
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+
+The rustup team is happy to announce the release of rustup version 1.28.2.
+[Rustup][install] is the recommended tool to install [Rust][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][pr#1660], 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][issue tracker] 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]
+
+[pr#1660]: https://github.com/rust-lang/rustup/pull/1660
+[pr#4254]: https://github.com/rust-lang/rustup/pull/4254
+[pr#4259]: https://github.com/rust-lang/rustup/pull/4259
+[pr#4265]: https://github.com/rust-lang/rustup/pull/4265
+[pr#4277]: https://github.com/rust-lang/rustup/pull/4277
+[issue tracker]: https://github.com/rust-lang/rustup/issues/
+
+## 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][install] from the appropriate page on our website.
+
+Rustup's documentation is also available in [the rustup book][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!
+
+[book]: https://rust-lang.github.io/rustup/
+[changelog]: https://github.com/rust-lang/rustup/blob/stable/CHANGELOG.md
+[contributors]: https://github.com/rust-lang/rustup/blob/stable/CHANGELOG.md#detailed-changes
+[install]: https://rustup.rs
+[rust]: https://www.rust-lang.org