Racer

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Racer is an open-source Rust code completion utility that provides automated code suggestions for editors and IDEs. It helps developers write Rust code more efficiently by offering completions and navigation features.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is racer?

Racer (Rust Auto-Complete-er) is an open-source utility designed to provide Rust code completion for various editors and IDEs. While not actively developed, it serves as a foundational tool for Rust developers, offering automated code suggestions and navigation capabilities. It integrates with popular environments like RLS, Eclipse, Emacs, Gedit, Gnome Builder, Kate, Sublime Text, Vim, Visual Studio Code, Atom, and Kakoune. Racer requires a nightly Rust toolchain and the rustc-dev component for compilation and operation. Users can install it via `cargo install` or from sources, and it relies on the Rust source code for its functionality, which can be managed via rustup.

Best used for

Ideal for developers who need to accelerate Rust development, navigate complex Rust codebases, and integrate robust code completion into their preferred text editors or IDEs. Especially valuable for those working with the Rust programming language and seeking an open-source solution.

Common actions

complete code

suggest code

integrate IDE

navigate code

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Capabilities

Key features

Rust code completion
Editor/IDE integration
Rust source code integration
Automatic source path detection
Command-line testing

Target Audience

developer

Integrations

rlseclipseemacsgeditgnome-builderkatesublime-textvim+ 3 more

Pricing & Plans

Open Source

Free

FAQs

Is Racer still actively maintained?

No, Racer is not actively developed. The project recommends considering newer software like rust-analyzer for Rust code completion. However, it remains functional and can be used with the specified configurations.

What are the core requirements to use Racer?

Racer requires a current nightly Rust toolchain and the `rustc-dev` component, which can be installed via `rustup`. It also needs `cargo` to be installed, as it calls `cargo` as a CLI tool internally for its operations.

How does Racer handle external crates for code completion?

To provide completions for names in external crates, Racer needs a `Cargo.lock` file. This means that after adding a dependency to your `Cargo.toml`, you must run a build command like `cargo build` or `cargo test` to enable completions for that dependency.

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