RACER = Rust Auto-Complete-er. A utility intended to provide Rust code completion for editors and IDEs. Maybe one day the 'er' bit will be exploring + refactoring or something.

This method requires Rust 1.5. Simply run:

cargo install racer

As mentioned in the command output, don't forget to add the installation directory to your PATH.

1. Clone the repository: git clone https://github.com/racer-rust/racer.git

2. cd racer; cargo build --release. The binary will now be in ./target/release/racer

3. Add the binary to your PATH. This can be done by moving it to a directory already in your PATH (i.e. /usr/local/bin) or by adding the ./target/release/ directory to your PATH

1. Fetch the Rust sourcecode

   1. automatically via rustup and run rustup component add rust-src in order to install the source to $(rustc --print sysroot)/lib/rustlib/src/rust/src. Rustup will keep the sources in sync with the toolchain if you run rustup update.

   2. manually from git, or download from https://www.rust-lang.org/install.html (the 'rustc' source download behind the 'source' link is the right one).

2. Set the RUST_SRC_PATH environment variable to point to the 'src' dir in the Rust source installation

   (e.g. % export RUST_SRC_PATH=/usr/local/src/rust/src or % export RUST_SRC_PATH="$(rustc --print sysroot)/lib/rustlib/src/rust/src" )

3. Test on the command line:

   racer complete std::io::B (should show some completions)

Racer can be used with Eclipse through the use of RustDT. (User guide is linked in repo description)

Emacs integration has been moved to a separate project: emacs-racer.

Gedit integration can be found here.

Gnome Builder integration can be found here

The Kate community maintains a plugin. It is bundled with recent releases of Kate (tested with 16.08 - read more here).

1. Enable 'Rust code completion' in the plugin list in the Kate config dialog;

2. On the new 'Rust code completion' dialog page, make sure 'Racer command' and 'Rust source tree location' are set correctly.

The Sublime Text community maintains some packages that integrates Racer

• RustAutoComplete that offers auto completion and goto definition.
• AnacondaRUST from the anaconda plugins family that offers auto completion, goto definition and show documentation

Vim integration has been moved to a separate project: vim-racer.

Racer recommends the vscode-rust extension. This is an actively-maintained fork of the now-deprecated RustyCode extension.

You can find the racer package for Atom here

Kakoune comes with a builtin integration for racer auto completion.