Beta testing rustup.rs

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rustup 0.6.0 is out. Update with rustup self update.

As mentioned previously, this fixes a serious bug with manifest handling, wherein rustup show and rustup target list panicked on recent nightlies.

This adds a new rustup component subcommand which is a generalized version of the existing rustup target subcommand. This one though allows installation of any ‘component’ package, a component being the unit of installation in rustup. The cool thing this is going to allow you to do is install the Rust source code, via rustup component add rust-src. Unfortunately, due to bugs in the generation of the rust-src package, it doesn’t work quite yet, and if you try today rustup will report a ‘corrupt manifest’ error. Once the upstream fix is merged though nightlies should begin coming with optional source components.

The installed source is in the lib/rustlib/src directory of the sysroot, and the sysroot can be discovered with rustc --print sysroot. The precise layout of this directory is not specified. Tools are expected to find the source of crates they need by walking the directory and reading Cargo.toml files. As an optimization they can use implicit knowledge of the structure of the rustc source tree to find the right Cargo.tomls quickly, but to be resilient they need to fall back to walking the tree.

Thanks @Diggsey for putting all the pieces together to make the rust-src package happen.

The other new feature in this release is the addition of the --path and --nonexistent options to rustup override unset, which allows overrides to be removed for paths that no longer exist.

Finally, @Boddlnagg has been doing amazing work integrating rustup into a Windows MSI installer. It’s not ready to test yet, but has been making quick progress.

0.6.0

Contributors: Alex Crichton, Brian Anderson, Diggory Blake, Ivan Nejgebauer Josh Machol, Julien Blanchard, Patrick Reisert, Ri, Tim Neumann

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