659 lines
26 KiB
Plaintext
659 lines
26 KiB
Plaintext
= User Manual
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:toc: preamble
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:sectanchors:
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:page-layout: post
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:icons: font
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:source-highlighter: rouge
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:experimental:
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// Master copy of this document lives in the https://github.com/rust-analyzer/rust-analyzer repository
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At its core, rust-analyzer is a *library* for semantic analysis of Rust code as it changes over time.
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This manual focuses on a specific usage of the library -- running it as part of a server that implements the
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https://microsoft.github.io/language-server-protocol/[Language Server Protocol] (LSP).
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The LSP allows various code editors, like VS Code, Emacs or Vim, to implement semantic features like completion or goto definition by talking to an external language server process.
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[TIP]
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====
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[.lead]
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To improve this document, send a pull request: +
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https://github.com/rust-analyzer/rust-analyzer/blob/master/docs/user/manual.adoc[https://github.com/rust-analyzer/.../manual.adoc]
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The manual is written in https://asciidoc.org[AsciiDoc] and includes some extra files which are generated from the source code. Run `cargo test` and `cargo test -p xtask` to create these and then `asciidoctor manual.adoc` to create an HTML copy.
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====
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If you have questions about using rust-analyzer, please ask them in the https://users.rust-lang.org/c/ide/14["`IDEs and Editors`"] topic of Rust users forum.
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== Installation
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In theory, one should be able to just install the <<rust-analyzer-language-server-binary,`rust-analyzer` binary>> and have it automatically work with any editor.
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We are not there yet, so some editor specific setup is required.
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Additionally, rust-analyzer needs the sources of the standard library.
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If the source code is not present, rust-analyzer will attempt to install it automatically.
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To add the sources manually, run the following command:
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```bash
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$ rustup component add rust-src
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```
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=== VS Code
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This is the best supported editor at the moment.
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The rust-analyzer plugin for VS Code is maintained
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https://github.com/rust-analyzer/rust-analyzer/tree/master/editors/code[in tree].
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You can install the latest release of the plugin from
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https://marketplace.visualstudio.com/items?itemName=matklad.rust-analyzer[the marketplace].
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Note that the plugin may cause conflicts with the
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https://marketplace.visualstudio.com/items?itemName=rust-lang.rust[official Rust plugin].
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It is recommended to disable the Rust plugin when using the rust-analyzer extension.
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By default, the plugin will prompt you to download the matching version of the server as well:
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image::https://user-images.githubusercontent.com/9021944/75067008-17502500-54ba-11ea-835a-f92aac50e866.png[]
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[NOTE]
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====
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To disable this notification put the following to `settings.json`
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[source,json]
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----
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{ "rust-analyzer.updates.askBeforeDownload": false }
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----
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====
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The server binary is stored in:
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* Linux: `~/.config/Code/User/globalStorage/matklad.rust-analyzer`
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* Linux (Remote, such as WSL): `~/.vscode-server/data/User/globalStorage/matklad.rust-analyzer`
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* macOS: `~/Library/Application\ Support/Code/User/globalStorage/matklad.rust-analyzer`
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* Windows: `%APPDATA%\Code\User\globalStorage\matklad.rust-analyzer`
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Note that we only support two most recent versions of VS Code.
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==== Updates
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The extension will be updated automatically as new versions become available.
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It will ask your permission to download the matching language server version binary if needed.
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===== Nightly
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We ship nightly releases for VS Code.
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To help us out with testing the newest code and follow the bleeding edge of our `master`, please use the following config:
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[source,json]
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----
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{ "rust-analyzer.updates.channel": "nightly" }
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----
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You will be prompted to install the `nightly` extension version.
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Just click `Download now` and from that moment you will get automatic updates every 24 hours.
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If you don't want to be asked for `Download now` every day when the new nightly version is released add the following to your `settings.json`:
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[source,json]
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----
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{ "rust-analyzer.updates.askBeforeDownload": false }
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----
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NOTE: Nightly extension should **only** be installed via the `Download now` action from VS Code.
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==== Manual installation
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Alternatively, procure both `rust-analyzer.vsix` and your platform's matching `rust-analyzer-{platform}`, for example from the
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https://github.com/rust-analyzer/rust-analyzer/releases[releases] page.
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Install the extension with the `Extensions: Install from VSIX` command within VS Code, or from the command line via:
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[source]
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----
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$ code --install-extension /path/to/rust-analyzer.vsix
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----
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Copy the `rust-analyzer-{platform}` binary anywhere, then add the path to your settings.json, for example:
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[source,json]
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----
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{ "rust-analyzer.server.path": "~/.local/bin/rust-analyzer-linux" }
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----
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==== Building From Source
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Alternatively, both the server and the Code plugin can be installed from source:
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[source]
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----
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$ git clone https://github.com/rust-analyzer/rust-analyzer.git && cd rust-analyzer
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$ cargo xtask install
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----
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You'll need Cargo, nodejs and npm for this.
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Note that installing via `xtask install` does not work for VS Code Remote, instead you'll need to install the `.vsix` manually.
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If you're not using Code, you can compile and install only the LSP server:
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[source]
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----
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$ cargo xtask install --server
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----
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==== Troubleshooting
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Here are some useful self-diagnostic commands:
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* **Rust Analyzer: Show RA Version** shows the version of `rust-analyzer` binary.
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* **Rust Analyzer: Status** prints some statistics about the server, and dependency information for the current file.
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* To enable server-side logging, run with `env RA_LOG=info` and see `Output > Rust Analyzer Language Server` in VS Code's panel.
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* To log project loading (sysroot & `cargo metadata`), set `RA_LOG=project_model=debug`.
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* To log all LSP requests, add `"rust-analyzer.trace.server": "verbose"` to the settings and look for `Rust Analyzer Language Server Trace` in the panel.
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* To enable client-side logging, add `"rust-analyzer.trace.extension": true` to the settings and open `Output > Rust Analyzer Client` in the panel.
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=== rust-analyzer Language Server Binary
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Other editors generally require the `rust-analyzer` binary to be in `$PATH`.
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You can download the pre-built binary from the https://github.com/rust-analyzer/rust-analyzer/releases[releases] page.
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Typically, you then need to rename the binary for your platform, e.g. `rust-analyzer-mac` if you're on Mac OS, to `rust-analyzer` and make it executable in addition to moving it into a directory in your `$PATH`.
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On Linux to install the `rust-analyzer` binary into `~/.local/bin`, this commands could be used
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[source,bash]
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----
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$ curl -L https://github.com/rust-analyzer/rust-analyzer/releases/latest/download/rust-analyzer-linux -o ~/.local/bin/rust-analyzer
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$ chmod +x ~/.local/bin/rust-analyzer
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----
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Ensure `~/.local/bin` is listed in the `$PATH` variable.
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Alternatively, you can install it from source using the command below.
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You'll need the latest stable version of the Rust toolchain.
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[source,bash]
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----
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$ git clone https://github.com/rust-analyzer/rust-analyzer.git && cd rust-analyzer
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$ cargo xtask install --server
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----
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If your editor can't find the binary even though the binary is on your `$PATH`, the likely explanation is that it doesn't see the same `$PATH` as the shell, see https://github.com/rust-analyzer/rust-analyzer/issues/1811[this issue].
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On Unix, running the editor from a shell or changing the `.desktop` file to set the environment should help.
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==== Arch Linux
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The `rust-analyzer` binary can be installed from the repos or AUR (Arch User Repository):
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- https://www.archlinux.org/packages/community/x86_64/rust-analyzer/[`rust-analyzer`] (built from latest tagged source)
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- https://aur.archlinux.org/packages/rust-analyzer-git[`rust-analyzer-git`] (latest Git version)
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Install it with pacman, for example:
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[source,bash]
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----
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$ pacman -S rust-analyzer
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----
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=== Emacs
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Note this excellent https://robert.kra.hn/posts/2021-02-07_rust-with-emacs/[guide] from https://github.com/rksm[@rksm].
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Prerequisites: You have installed the <<rust-analyzer-language-server-binary,`rust-analyzer` binary>>.
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Emacs support is maintained as part of the https://github.com/emacs-lsp/lsp-mode[Emacs-LSP] package in https://github.com/emacs-lsp/lsp-mode/blob/master/lsp-rust.el[lsp-rust.el].
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1. Install the most recent version of `emacs-lsp` package by following the https://github.com/emacs-lsp/lsp-mode[Emacs-LSP instructions].
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2. Set `lsp-rust-server` to `'rust-analyzer`.
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3. Run `lsp` in a Rust buffer.
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4. (Optionally) bind commands like `lsp-rust-analyzer-join-lines`, `lsp-extend-selection` and `lsp-rust-analyzer-expand-macro` to keys.
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=== Vim/NeoVim
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Prerequisites: You have installed the <<rust-analyzer-language-server-binary,`rust-analyzer` binary>>.
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Not needed if the extension can install/update it on its own, coc-rust-analyzer is one example.
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The are several LSP client implementations for vim or neovim:
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==== coc-rust-analyzer
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1. Install coc.nvim by following the instructions at
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https://github.com/neoclide/coc.nvim[coc.nvim]
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(Node.js required)
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2. Run `:CocInstall coc-rust-analyzer` to install
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https://github.com/fannheyward/coc-rust-analyzer[coc-rust-analyzer],
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this extension implements _most_ of the features supported in the VSCode extension:
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* automatically install and upgrade stable/nightly releases
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* same configurations as VSCode extension, `rust-analyzer.server.path`, `rust-analyzer.cargo.features` etc.
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* same commands too, `rust-analyzer.analyzerStatus`, `rust-analyzer.ssr` etc.
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* inlay hints for variables and method chaining, _Neovim Only_
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* semantic highlighting is not implemented yet
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Note: for code actions, use `coc-codeaction-cursor` and `coc-codeaction-selected`; `coc-codeaction` and `coc-codeaction-line` are unlikely to be useful.
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==== LanguageClient-neovim
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1. Install LanguageClient-neovim by following the instructions
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https://github.com/autozimu/LanguageClient-neovim[here]
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* The GitHub project wiki has extra tips on configuration
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2. Configure by adding this to your vim/neovim config file (replacing the existing Rust-specific line if it exists):
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+
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[source,vim]
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----
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let g:LanguageClient_serverCommands = {
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\ 'rust': ['rust-analyzer'],
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\ }
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----
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==== YouCompleteMe
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1. Install YouCompleteMe by following the instructions
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https://github.com/ycm-core/lsp-examples#rust-rust-analyzer[here]
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2. Configure by adding this to your vim/neovim config file (replacing the existing Rust-specific line if it exists):
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+
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[source,vim]
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----
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let g:ycm_language_server =
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\ [
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\ {
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\ 'name': 'rust',
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\ 'cmdline': ['rust-analyzer'],
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\ 'filetypes': ['rust'],
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\ 'project_root_files': ['Cargo.toml']
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\ }
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\ ]
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----
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==== ALE
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To use the LSP server in https://github.com/dense-analysis/ale[ale]:
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[source,vim]
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----
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let g:ale_linters = {'rust': ['analyzer']}
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----
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==== nvim-lsp
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NeoVim 0.5 (not yet released) has built-in language server support.
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For a quick start configuration of rust-analyzer, use https://github.com/neovim/nvim-lspconfig#rust_analyzer[neovim/nvim-lspconfig].
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Once `neovim/nvim-lspconfig` is installed, use `+lua require'lspconfig'.rust_analyzer.setup({})+` in your `init.vim`.
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You can also pass LSP settings to the server:
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[source,vim]
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----
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lua << EOF
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local nvim_lsp = require'lspconfig'
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local on_attach = function(client)
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require'completion'.on_attach(client)
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end
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nvim_lsp.rust_analyzer.setup({
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on_attach=on_attach,
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settings = {
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["rust-analyzer"] = {
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assist = {
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importMergeBehavior = "last",
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importPrefix = "by_self",
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},
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cargo = {
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loadOutDirsFromCheck = true
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},
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procMacro = {
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enable = true
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},
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}
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}
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})
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EOF
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----
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See https://sharksforarms.dev/posts/neovim-rust/ for more tips on getting started.
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==== vim-lsp
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vim-lsp is installed by following https://github.com/prabirshrestha/vim-lsp[the plugin instructions].
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It can be as simple as adding this line to your `.vimrc`:
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[source,vim]
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----
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Plug 'prabirshrestha/vim-lsp'
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----
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Next you need to register the `rust-analyzer` binary.
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If it is available in `$PATH`, you may want to add this to your `.vimrc`:
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[source,vim]
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----
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if executable('rust-analyzer')
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au User lsp_setup call lsp#register_server({
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\ 'name': 'Rust Language Server',
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\ 'cmd': {server_info->['rust-analyzer']},
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\ 'whitelist': ['rust'],
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\ })
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endif
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----
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There is no dedicated UI for the server configuration, so you would need to send any options as a value of the `initialization_options` field, as described in the <<_configuration,Configuration>> section.
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Here is an example of how to enable the proc-macro support:
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[source,vim]
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----
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if executable('rust-analyzer')
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au User lsp_setup call lsp#register_server({
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\ 'name': 'Rust Language Server',
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\ 'cmd': {server_info->['rust-analyzer']},
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\ 'whitelist': ['rust'],
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\ 'initialization_options': {
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\ 'cargo': {
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\ 'loadOutDirsFromCheck': v:true,
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\ },
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\ 'procMacro': {
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\ 'enable': v:true,
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\ },
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\ },
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\ })
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endif
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----
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=== Sublime Text 3
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Prerequisites: You have installed the <<rust-analyzer-language-server-binary,`rust-analyzer` binary>>.
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You also need the `LSP` package.
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To install it:
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1. If you've never installed a Sublime Text package, install Package Control:
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* Open the command palette (Win/Linux: `ctrl+shift+p`, Mac: `cmd+shift+p`)
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* Type `Install Package Control`, press enter
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2. In the command palette, run `Package control: Install package`, and in the list that pops up, type `LSP` and press enter.
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Finally, with your Rust project open, in the command palette, run `LSP: Enable Language Server In Project` or `LSP: Enable Language Server Globally`, then select `rust-analyzer` in the list that pops up to enable the rust-analyzer LSP.
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The latter means that rust-analyzer is enabled by default in Rust projects.
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If it worked, you should see "rust-analyzer, Line X, Column Y" on the left side of the bottom bar, and after waiting a bit, functionality like tooltips on hovering over variables should become available.
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If you get an error saying `No such file or directory: 'rust-analyzer'`, see the <<rust-analyzer-language-server-binary,`rust-analyzer` binary>> section on installing the language server binary.
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=== GNOME Builder
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GNOME Builder 3.37.1 and newer has native `rust-analyzer` support.
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If the LSP binary is not available, GNOME Builder can install it when opening a Rust file.
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=== Eclipse IDE
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Support for Rust development in the Eclipse IDE is provided by link:https://github.com/eclipse/corrosion[Eclipse Corrosion].
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If available in PATH or in some standard location, `rust-analyzer` is detected and powers editing of Rust files without further configuration.
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If `rust-analyzer` is not detected, Corrosion will prompt you for configuration of your Rust toolchain and language server with a link to the __Window > Preferences > Rust__ preference page; from here a button allows to download and configure `rust-analyzer`, but you can also reference another installation.
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You'll need to close and reopen all .rs and Cargo files, or to restart the IDE, for this change to take effect.
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== Configuration
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**Source:** https://github.com/rust-analyzer/rust-analyzer/blob/master/crates/rust-analyzer/src/config.rs[config.rs]
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The <<_installation,Installation>> section contains details on configuration for some of the editors.
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In general `rust-analyzer` is configured via LSP messages, which means that it's up to the editor to decide on the exact format and location of configuration files.
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Some clients, such as <<vs-code,VS Code>> or <<coc-rust-analyzer,COC plugin in Vim>> provide `rust-analyzer` specific configuration UIs. Others may require you to know a bit more about the interaction with `rust-analyzer`.
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For the later category, it might help to know that the initial configuration is specified as a value of the `initializationOptions` field of the https://microsoft.github.io/language-server-protocol/specifications/specification-current/#initialize[`InitializeParams` message, in the LSP protocol].
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The spec says that the field type is `any?`, but `rust-analyzer` is looking for a JSON object that is constructed using settings from the list below.
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Name of the setting, ignoring the `rust-analyzer.` prefix, is used as a path, and value of the setting becomes the JSON property value.
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For example, a very common configuration is to enable proc-macro support, can be achieved by sending this JSON:
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[source,json]
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----
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{
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"cargo": {
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"loadOutDirsFromCheck": true,
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},
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"procMacro": {
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"enable": true,
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}
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}
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----
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Please consult your editor's documentation to learn more about how to configure https://microsoft.github.io/language-server-protocol/[LSP servers].
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To verify which configuration is actually used by `rust-analyzer`, set `RA_LOG` environment variable to `rust_analyzer=info` and look for config-related messages.
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Logs should show both the JSON that `rust-analyzer` sees as well as the updated config.
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This is the list of config options `rust-analyzer` supports:
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include::./generated_config.adoc[]
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== Non-Cargo Based Projects
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rust-analyzer does not require Cargo.
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However, if you use some other build system, you'll have to describe the structure of your project for rust-analyzer in the `rust-project.json` format:
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[source,TypeScript]
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----
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interface JsonProject {
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/// Path to the directory with *source code* of sysroot crates.
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///
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/// It should point to the directory where std, core, and friends can be found:
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/// https://github.com/rust-lang/rust/tree/master/library.
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///
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/// If provided, rust-analyzer automatically adds dependencies on sysroot
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/// crates. Conversely, if you omit this path, you can specify sysroot
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/// dependencies yourself and, for example, have several different "sysroots" in
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/// one graph of crates.
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sysroot_src?: string;
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/// The set of crates comprising the current project.
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/// Must include all transitive dependencies as well as sysroot crate (libstd, libcore and such).
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crates: Crate[];
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}
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interface Crate {
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/// Optional crate name used for display purposes, without affecting semantics.
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/// See the `deps` key for semantically-significant crate names.
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display_name?: string;
|
|
/// Path to the root module of the crate.
|
|
root_module: string;
|
|
/// Edition of the crate.
|
|
edition: "2015" | "2018" | "2021";
|
|
/// Dependencies
|
|
deps: Dep[];
|
|
/// Should this crate be treated as a member of current "workspace".
|
|
///
|
|
/// By default, inferred from the `root_module` (members are the crates which reside
|
|
/// inside the directory opened in the editor).
|
|
///
|
|
/// Set this to `false` for things like standard library and 3rd party crates to
|
|
/// enable performance optimizations (rust-analyzer assumes that non-member crates
|
|
/// don't change).
|
|
is_workspace_member?: boolean;
|
|
/// Optionally specify the (super)set of `.rs` files comprising this crate.
|
|
///
|
|
/// By default, rust-analyzer assumes that only files under `root_module.parent` can belong to a crate.
|
|
/// `include_dirs` are included recursively, unless a subdirectory is in `exclude_dirs`.
|
|
///
|
|
/// Different crates can share the same `source`.
|
|
///
|
|
/// If two crates share an `.rs` file in common, they *must* have the same `source`.
|
|
/// rust-analyzer assumes that files from one source can't refer to files in another source.
|
|
source?: {
|
|
include_dirs: string[],
|
|
exclude_dirs: string[],
|
|
},
|
|
/// The set of cfgs activated for a given crate, like `["unix", "feature=foo", "feature=bar"]`.
|
|
cfg: string[];
|
|
/// Target triple for this Crate.
|
|
///
|
|
/// Used when running `rustc --print cfg` to get target-specific cfgs.
|
|
target?: string;
|
|
/// Environment variables, used for the `env!` macro
|
|
env: : { [key: string]: string; },
|
|
|
|
/// For proc-macro crates, path to compiles proc-macro (.so file).
|
|
proc_macro_dylib_path?: string;
|
|
}
|
|
|
|
interface Dep {
|
|
/// Index of a crate in the `crates` array.
|
|
crate: number,
|
|
/// Name as should appear in the (implicit) `extern crate name` declaration.
|
|
name: string,
|
|
}
|
|
----
|
|
|
|
This format is provisional and subject to change.
|
|
Specifically, the `roots` setup will be different eventually.
|
|
|
|
There are tree ways to feed `rust-project.json` to rust-analyzer:
|
|
|
|
* Place `rust-project.json` file at the root of the project, and rust-anlayzer will discover it.
|
|
* Specify `"rust-analyzer.linkedProjects": [ "path/to/rust-project.json" ]` in the settings (and make sure that your LSP client sends settings as a part of initialize request).
|
|
* Specify `"rust-analyzer.linkedProjects": [ { "roots": [...], "crates": [...] }]` inline.
|
|
|
|
Relative paths are interpreted relative to `rust-project.json` file location or (for inline JSON) relative to `rootUri`.
|
|
|
|
See https://github.com/rust-analyzer/rust-project.json-example for a small example.
|
|
|
|
You can set `RA_LOG` environmental variable to `rust_analyzer=info` to inspect how rust-analyzer handles config and project loading.
|
|
|
|
== Security
|
|
|
|
At the moment, rust-analyzer assumes that all code is trusted.
|
|
Here is a **non-exhaustive** list of ways to make rust-analyzer execute arbitrary code:
|
|
|
|
* proc macros and build scripts are executed by default
|
|
* `.cargo/config` can override `rustc` with an arbitrary executable
|
|
* VS Code plugin reads configuration from project directory, and that can be used to override paths to various executables, like `rustfmt` or `rust-analyzer` itself.
|
|
* rust-analyzer's syntax trees library uses a lot of `unsafe` and hasn't been properly audited for memory safety.
|
|
|
|
rust-analyzer itself doesn't access the network.
|
|
VS Code plugin doesn't access the network unless the nightly channel is selected in the settings.
|
|
In that case, the plugin uses GitHub API to check for and download updates.
|
|
|
|
== Features
|
|
|
|
include::./generated_features.adoc[]
|
|
|
|
== Assists (Code Actions)
|
|
|
|
Assists, or code actions, are small local refactorings, available in a particular context.
|
|
They are usually triggered by a shortcut or by clicking a light bulb icon in the editor.
|
|
Cursor position or selection is signified by `┃` character.
|
|
|
|
include::./generated_assists.adoc[]
|
|
|
|
== Diagnostics
|
|
|
|
While most errors and warnings provided by rust-analyzer come from the `cargo check` integration, there's a growing number of diagnostics implemented using rust-analyzer's own analysis.
|
|
These diagnostics don't respect `#[allow]` or `#[deny]` attributes yet, but can be turned off using the `rust-analyzer.diagnostics.enable`, `rust-analyzer.diagnostics.enableExperimental` or `rust-analyzer.diagnostics.disabled` settings.
|
|
|
|
include::./generated_diagnostic.adoc[]
|
|
|
|
== Editor Features
|
|
=== VS Code
|
|
|
|
==== Color configurations
|
|
|
|
It is possible to change the foreground/background color of inlay hints.
|
|
Just add this to your `settings.json`:
|
|
|
|
[source,jsonc]
|
|
----
|
|
{
|
|
"workbench.colorCustomizations": {
|
|
// Name of the theme you are currently using
|
|
"[Default Dark+]": {
|
|
"rust_analyzer.inlayHints.foreground": "#868686f0",
|
|
"rust_analyzer.inlayHints.background": "#3d3d3d48",
|
|
|
|
// Overrides for specific kinds of inlay hints
|
|
"rust_analyzer.inlayHints.foreground.typeHints": "#fdb6fdf0",
|
|
"rust_analyzer.inlayHints.foreground.paramHints": "#fdb6fdf0",
|
|
"rust_analyzer.inlayHints.background.chainingHints": "#6b0c0c81"
|
|
}
|
|
}
|
|
}
|
|
----
|
|
|
|
==== Semantic style customizations
|
|
|
|
You can customize the look of different semantic elements in the source code.
|
|
For example, mutable bindings are underlined by default and you can override this behavior by adding the following section to your `settings.json`:
|
|
|
|
[source,jsonc]
|
|
----
|
|
{
|
|
"editor.semanticTokenColorCustomizations": {
|
|
"rules": {
|
|
"*.mutable": {
|
|
"fontStyle": "", // underline is the default
|
|
},
|
|
}
|
|
},
|
|
}
|
|
----
|
|
|
|
==== Special `when` clause context for keybindings.
|
|
You may use `inRustProject` context to configure keybindings for rust projects only.
|
|
For example:
|
|
|
|
[source,json]
|
|
----
|
|
{
|
|
"key": "ctrl+i",
|
|
"command": "rust-analyzer.toggleInlayHints",
|
|
"when": "inRustProject"
|
|
}
|
|
----
|
|
More about `when` clause contexts https://code.visualstudio.com/docs/getstarted/keybindings#_when-clause-contexts[here].
|
|
|
|
==== Setting runnable environment variables
|
|
You can use "rust-analyzer.runnableEnv" setting to define runnable environment-specific substitution variables.
|
|
The simplest way for all runnables in a bunch:
|
|
```jsonc
|
|
"rust-analyzer.runnableEnv": {
|
|
"RUN_SLOW_TESTS": "1"
|
|
}
|
|
```
|
|
|
|
Or it is possible to specify vars more granularly:
|
|
```jsonc
|
|
"rust-analyzer.runnableEnv": [
|
|
{
|
|
// "mask": null, // null mask means that this rule will be applied for all runnables
|
|
env: {
|
|
"APP_ID": "1",
|
|
"APP_DATA": "asdf"
|
|
}
|
|
},
|
|
{
|
|
"mask": "test_name",
|
|
"env": {
|
|
"APP_ID": "2", // overwrites only APP_ID
|
|
}
|
|
}
|
|
]
|
|
```
|
|
|
|
You can use any valid regular expression as a mask.
|
|
Also note that a full runnable name is something like *run bin_or_example_name*, *test some::mod::test_name* or *test-mod some::mod*, so it is possible to distinguish binaries, single tests, and test modules with this masks: `"^run"`, `"^test "` (the trailing space matters!), and `"^test-mod"` respectively.
|
|
|
|
==== Compiler feedback from external commands
|
|
|
|
Instead of relying on the built-in `cargo check`, you can configure Code to run a command in the background and use the `$rustc-watch` problem matcher to generate inline error markers from its output.
|
|
|
|
To do this you need to create a new https://code.visualstudio.com/docs/editor/tasks[VS Code Task] and set `rust-analyzer.checkOnSave.enable: false` in preferences.
|
|
|
|
For example, if you want to run https://crates.io/crates/cargo-watch[`cargo watch`] instead, you might add the following to `.vscode/tasks.json`:
|
|
|
|
```json
|
|
{
|
|
"label": "Watch",
|
|
"group": "build",
|
|
"type": "shell",
|
|
"command": "cargo watch",
|
|
"problemMatcher": "$rustc-watch",
|
|
"isBackground": true
|
|
}
|
|
```
|