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move dev docs to manual
fix formatting
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14 changed files with 201 additions and 173 deletions
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@ -4,7 +4,7 @@ Thank you for your interest in contributing to rust-analyzer! There are many way
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and we appreciate all of them.
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To get a quick overview of the crates and structure of the project take a look at the
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[./docs/dev](./docs/dev) folder.
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[Contributing](https://rust-analyzer.github.io/book/contributing) section of the manual.
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If you have any questions please ask them in the [rust-analyzer zulip stream](
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https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer) or if unsure where
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@ -14,8 +14,8 @@ https://rust-analyzer.github.io/book/installation.html
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## Documentation
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If you want to **contribute** to rust-analyzer check out the [CONTRIBUTING.md](./CONTRIBUTING.md) or
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if you are just curious about how things work under the hood, check the [./docs/dev](./docs/dev)
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folder.
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if you are just curious about how things work under the hood, see the
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[Contributing](https://rust-analyzer.github.io/book/contributing) section of the manual.
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If you want to **use** rust-analyzer's language server with your editor of
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choice, check [the manual](https://rust-analyzer.github.io/book/).
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@ -34,3 +34,8 @@ use-boolean-and = true
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[output.html.fold]
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enable = true
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level = 3
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[preprocessor.toc]
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command = "mdbook-toc"
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renderer = ["html"]
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max-level = 3
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@ -14,3 +14,11 @@
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- [Assists (Code Actions)](assists.md)
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- [Diagnostics](diagnostics.md)
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- [Editor Features](editor_features.md)
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- [Contributing](contributing/README.md)
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- [Architecture](contributing/architecture.md)
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- [Debugging](contributing/debugging.md)
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- [Guide](contributing/guide.md)
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- [LSP Extensions](contributing/lsp-extensions.md)
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- [Setup](contributing/setup.md)
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- [Style](contributing/style.md)
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- [Syntax](contributing/syntax.md)
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File diff suppressed because it is too large
Load diff
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@ -9,7 +9,7 @@ $ cargo test
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should be enough to get you started!
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To learn more about how rust-analyzer works, see [./architecture.md](./architecture.md).
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To learn more about how rust-analyzer works, see [Architecture](architecture.md).
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It also explains the high-level layout of the source code.
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Do skim through that document.
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@ -24,7 +24,9 @@ rust-analyzer is a part of the [RLS-2.0 working
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group](https://github.com/rust-lang/compiler-team/tree/6a769c13656c0a6959ebc09e7b1f7c09b86fb9c0/working-groups/rls-2.0).
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Discussion happens in this Zulip stream:
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https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer
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<https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer>
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<!-- toc -->
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# Issue Labels
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@ -54,7 +56,7 @@ https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer
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# Code Style & Review Process
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Do see [./style.md](./style.md).
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See the [Style Guide](style.md).
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# Cookbook
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@ -88,11 +90,13 @@ As a sanity check after I'm done, I use `cargo xtask install --server` and **Rel
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If the problem concerns only the VS Code extension, I use **Run Installed Extension** launch configuration from `launch.json`.
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Notably, this uses the usual `rust-analyzer` binary from `PATH`.
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For this, it is important to have the following in your `settings.json` file:
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```json
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{
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"rust-analyzer.server.path": "rust-analyzer"
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}
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```
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After I am done with the fix, I use `cargo xtask install --client` to try the new extension for real.
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If I need to fix something in the `rust-analyzer` crate, I feel sad because it's on the boundary between the two processes, and working there is slow.
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@ -117,6 +121,7 @@ cd editors/code
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npm ci
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npm run lint
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```
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## How to ...
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* ... add an assist? [#7535](https://github.com/rust-lang/rust-analyzer/pull/7535)
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@ -142,14 +147,15 @@ Note that `stdout` is used for the actual protocol, so `println!` will break thi
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To log all communication between the server and the client, there are two choices:
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* You can log on the server side, by running something like
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```
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env RA_LOG=lsp_server=debug code .
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```
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* You can log on the client side, by the `rust-analyzer: Toggle LSP Logs` command or enabling `"rust-analyzer.trace.server": "verbose"` workspace setting.
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These logs are shown in a separate tab in the output and could be used with LSP inspector.
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Kudos to [@DJMcNab](https://github.com/DJMcNab) for setting this awesome infra up!
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There are also several VS Code commands which might be of interest:
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* `rust-analyzer: Status` shows some memory-usage statistics.
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@ -8,19 +8,20 @@ It goes deeper than what is covered in this document, but will take some time to
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See also these implementation-related blog posts:
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* https://rust-analyzer.github.io/blog/2019/11/13/find-usages.html
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* https://rust-analyzer.github.io/blog/2020/07/20/three-architectures-for-responsive-ide.html
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* https://rust-analyzer.github.io/blog/2020/09/16/challeging-LR-parsing.html
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* https://rust-analyzer.github.io/blog/2020/09/28/how-to-make-a-light-bulb.html
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* https://rust-analyzer.github.io/blog/2020/10/24/introducing-ungrammar.html
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* <https://rust-analyzer.github.io/blog/2019/11/13/find-usages.html>
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* <https://rust-analyzer.github.io/blog/2020/07/20/three-architectures-for-responsive-ide.html>
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* <https://rust-analyzer.github.io/blog/2020/09/16/challeging-LR-parsing.html>
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* <https://rust-analyzer.github.io/blog/2020/09/28/how-to-make-a-light-bulb.html>
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* <https://rust-analyzer.github.io/blog/2020/10/24/introducing-ungrammar.html>
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For older, by now mostly outdated stuff, see the [guide](./guide.md) and [another playlist](https://www.youtube.com/playlist?list=PL85XCvVPmGQho7MZkdW-wtPtuJcFpzycE).
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## Bird's Eye View
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<!-- toc -->
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On the highest level, rust-analyzer is a thing which accepts input source code from the client and produces a structured semantic model of the code.
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More specifically, input data consists of a set of test files (`(PathBuf, String)` pairs) and information about project structure, captured in the so called `CrateGraph`.
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@ -8,6 +8,7 @@
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<img height=150px src="https://user-images.githubusercontent.com/36276403/74611090-92ec5380-5101-11ea-8a41-598f51f3f3e3.png" alt="Debug options view">
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- Install all TypeScript dependencies
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```bash
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cd editors/code
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npm ci
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where **only** the `rust-analyzer` extension being debugged is enabled.
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* To activate the extension you need to open any Rust project folder in `[Extension Development Host]`.
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## Debug TypeScript VSCode extension
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- `Run Installed Extension` - runs the extension with the globally installed `rust-analyzer` binary.
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- When attaching a debugger to an already running `rust-analyzer` server on Linux you might need to enable `ptrace` for unrelated processes by running:
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```
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```bash
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echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
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```
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- By default, the LSP server is built without debug information. To enable it, you'll need to change `Cargo.toml`:
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```toml
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[profile.dev]
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debug = 2
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- Go back to the `[Extension Development Host]` instance and hover over a Rust variable and your breakpoint should hit.
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If you need to debug the server from the very beginning, including its initialization code, you can use the `--wait-dbg` command line argument or `RA_WAIT_DBG` environment variable. The server will spin at the beginning of the `try_main` function (see `crates\rust-analyzer\src\bin\main.rs`)
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```rust
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let mut d = 4;
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while d == 4 { // set a breakpoint here and change the value
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```
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However for this to work, you will need to enable debug_assertions in your build
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```rust
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RUSTFLAGS='--cfg debug_assertions' cargo build --release
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```
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@ -12,6 +12,8 @@ https://youtu.be/ANKBNiSWyfc.
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[guide-2019-01]: https://github.com/rust-lang/rust-analyzer/tree/guide-2019-01
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[2024-01-01]: https://github.com/rust-lang/rust-analyzer/tree/2024-01-01
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<!-- toc -->
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## The big picture
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On the highest possible level, rust-analyzer is a stateful component. A client may
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@ -76,10 +78,10 @@ to study its methods to understand all the input data.
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The `change_file` method controls the set of the input files, where each file
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has an integer id (`FileId`, picked by the client) and text (`Option<Arc<str>>`).
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Paths are tricky; they'll be explained below, in source roots section,
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Paths are tricky; they'll be explained below, in source roots section,
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together with the `set_roots` method. The "source root" [`is_library`] flag
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along with the concept of [`durability`] allows us to add a group of files which
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are assumed to rarely change. It's mostly an optimization and does not change
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along with the concept of [`durability`] allows us to add a group of files which
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are assumed to rarely change. It's mostly an optimization and does not change
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the fundamental picture.
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[`is_library`]: https://github.com/rust-lang/rust-analyzer/blob/2024-01-01/crates/base-db/src/input.rs#L38
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## Language Server Protocol
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Now let's see how the `Analysis` API is exposed via the JSON RPC based language server protocol.
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Now let's see how the `Analysis` API is exposed via the JSON RPC based language server protocol.
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The hard part here is managing changes (which can come either from the file system
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or from the editor) and concurrency (we want to spawn background jobs for things
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like syntax highlighting). We use the event loop pattern to manage the zoo, and
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[`GlobalState::new`]: https://github.com/rust-lang/rust-analyzer/blob/2024-01-01/crates/rust-analyzer/src/global_state.rs#L148-L215
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[`GlobalState::run`]: https://github.com/rust-lang/rust-analyzer/blob/2024-01-01/crates/rust-analyzer/src/main_loop.rs#L114-L140
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Let's walk through a typical analyzer session!
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First, we need to figure out what to analyze. To do this, we run `cargo
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metadata` to learn about Cargo packages for current workspace and dependencies,
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and we run `rustc --print sysroot` and scan the "sysroot"
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(the directory containing the current Rust toolchain's files) to learn about crates
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(the directory containing the current Rust toolchain's files) to learn about crates
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like `std`. This happens in the [`GlobalState::fetch_workspaces`] method.
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We load this configuration at the start of the server in [`GlobalState::new`],
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but it's also triggered by workspace change events and requests to reload the
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@ -19,6 +19,8 @@ Requests, which are likely to always remain specific to `rust-analyzer` are unde
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If you want to be notified about the changes to this document, subscribe to [#4604](https://github.com/rust-lang/rust-analyzer/issues/4604).
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<!-- toc -->
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## Configuration in `initializationOptions`
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**Upstream Issue:** https://github.com/microsoft/language-server-protocol/issues/567
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@ -1,3 +1,5 @@
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# Style
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Our approach to "clean code" is two-fold:
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* We generally don't block PRs on style changes.
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@ -27,8 +27,9 @@ fn check_lsp_extensions_docs(sh: &Shell) {
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};
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let actual_hash = {
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let lsp_extensions_md =
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sh.read_file(project_root().join("docs/dev/lsp-extensions.md")).unwrap();
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let lsp_extensions_md = sh
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.read_file(project_root().join("docs/book/src/contributing/lsp-extensions.md"))
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.unwrap();
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let text = lsp_extensions_md
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.lines()
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.find_map(|line| line.strip_prefix("lsp/ext.rs hash:"))
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