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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 <kbd>Ctrl+Shift+P</kbd> 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.cargo-watch.check-arguments`: cargo-watch check arguments.
(e.g: `--features="shumway,pdf"` will run as `cargo watch -x "check --features="shumway,pdf""` )
* `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
## Sublime Text 3
Prequisites:
`LSP` package.
Installation:
* Invoke the command palette with <kbd>Ctrl+Shift+P</kbd>
* Type `LSP Settings` to open the LSP preferences editor
* Add the following LSP client definition to your settings:
```json
"rust-analyzer": {
"command": ["rustup", "run", "stable", "ra_lsp_server"],
"languageId": "rust",
"scopes": ["source.rust"],
"syntaxes": [
"Packages/Rust/Rust.sublime-syntax",
"Packages/Rust Enhanced/RustEnhanced.sublime-syntax"
]
}
```
* You can now invoke the command palette and type LSP enable to locally/globally enable the rust-analyzer LSP (type LSP enable, then choose either locally or globally, then select rust-analyzer)
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