If you've already installed RLS via rustup, then you can skip this step and go straight to setting up your editor.
You can install rustup on many platforms. This will help us quickly install the RLS and its dependencies.
If you already have rustup installed, be sure to run self update to ensure you have the latest rustup:
rustup self update
Install the nightly compiler. You don't have to use it as your default compiler, but it needs to be on your system:
rustup install nightly
Once you have rustup installed, run the following commands:
rustup component add rls-preview --toolchain nightly rustup component add rust-analysis --toolchain nightly rustup component add rust-src --toolchain nightly
If you've never set up Racer before, you'll need to set up your RUST_SRC_PATH variable. To do so, you can follow the Racer configuration steps