The current solution is to use rustup. Once installed, you can install multiple toolchains:
rustup install nightly
rustup install stable
rustup install 1.7
If you have a local build of Rust, you can link it as a toolchain
rustup toolchain link my-development /path/to/rust/code
You can pick a default toolchain
rustup default stable
Or add an override toolchain for a specific directory on your machine only via rustup
cd /my/cool/project
rustup override set nightly
Or add an override toolchain that lives with a specific directory, like a repository, via a rust-toolchain file
cd /my/cool/project
echo "nightly" > rust-toolchain
If you want to just use a different toolchain temporarily, you can use the "plus syntax":
rustc +1.7 --help
cargo +nightly build
In other cases you can use rustup run to run any arbitrary command in a specific toolchain:
rustup run nightly any command you want here
See also:
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