The main interface to rust-analyzer is the [LSP](https://microsoft.github.io/language-server-protocol/) implementation. To install lsp server, use `cargo install-lsp`, which is a shorthand for `cargo install --package ra_lsp_server`. The binary is named `ra_lsp_server`, you should be able to use it with any LSP-compatible editor. We use custom extensions to LSP, so special client-side support is required to take full advantage of rust-analyzer. This repository contains support code for VS Code and Emacs. Rust Analyzer needs sources of rust standard library to work, so you might need to execute ``` $ rustup component add rust-src ``` See [./features.md](./features.md) document for a list of features that are available. ## VS Code Prerequisites: In order to build the VS Code plugin, you need to have node.js and npm with a minimum version of 10 installed. Please refer to [node.js and npm documentation](https://nodejs.org) for installation instructions. You will also need the most recent version of VS Code: we don't try to maintain compatibility with older versions yet. The experimental VS Code plugin can then be built and installed by executing the following commands: ``` $ git clone https://github.com/rust-analyzer/rust-analyzer.git --depth 1 $ cd rust-analyzer $ cargo install-code ``` This will run `cargo install --package ra_lsp_server` to install the server binary into `~/.cargo/bin`, and then will build and install plugin from `editors/code`. See [this](https://github.com/rust-analyzer/rust-analyzer/blob/69ee5c9c5ef212f7911028c9ddf581559e6565c3/crates/tools/src/main.rs#L37-L56) for details. The installation is expected to *just work*, if it doesn't, report bugs! It's better to remove existing Rust plugins to avoid interference. Beyond basic LSP features, there are some extension commands which you can invoke via Ctrl+Shift+P or bind to a shortcut. See [./features.md](./features.md) for details. ### Settings * `rust-analyzer.highlightingOn`: enables experimental syntax highlighting * `rust-analyzer.showWorkspaceLoadedNotification`: to ease troubleshooting, a notification is shown by default when a workspace is loaded * `rust-analyzer.enableEnhancedTyping`: by default, rust-analyzer intercepts `Enter` key to make it easier to continue comments * `rust-analyzer.raLspServerPath`: path to `ra_lsp_server` executable * `rust-analyzer.enableCargoWatchOnStartup`: prompt to install & enable `cargo watch` for live error highlighting (note, this **does not** use rust-analyzer) * `rust-analyzer.trace.server`: enables internal logging * `rust-analyzer.trace.cargo-watch`: enables cargo-watch logging ## Emacs Prerequisites: `emacs-lsp`, `dash` and `ht` packages. Installation: * add [ra-emacs-lsp.el](https://github.com/rust-analyzer/rust-analyzer/blob/69ee5c9c5ef212f7911028c9ddf581559e6565c3/editors/emacs/ra-emacs-lsp.el) to load path and require it in `init.el` * run `lsp` in a rust buffer * (Optionally) bind commands like `rust-analyzer-join-lines` or `rust-analyzer-extend-selection` to keys