# Rust Analyzer
-[](https://travis-ci.org/rust-analyzer/rust-analyzer)
+Rust Analyzer is an **experimental** modular compiler frontend for the Rust
+language. It is a part of a larger rls-2.0 effort to create excellent IDE
+support for Rust. If you want to get involved, check the rls-2.0 working group
+in the compiler-team repository:
-Rust Analyzer is an **experimental** modular compiler frontend for the
-Rust language, which aims to lay a foundation for excellent IDE
-support.
-
-It doesn't implement much of compiler functionality yet, but the
-white-space preserving Rust parser works, and there are significant
-chunks of overall architecture (indexing, on-demand & lazy
-computation, snapshotable world view) in place. Some basic IDE
-functionality is provided via a language server.
+https://github.com/rust-lang/compiler-team/tree/master/content/working-groups/rls-2.0
Work on the Rust Analyzer is sponsored by
-[](https://ferrous-systems.com/)
+[<img src="https://user-images.githubusercontent.com/1711539/58105231-cf306900-7bee-11e9-83d8-9f1102e59d29.png" alt="Ferrous Systems" width="300">](https://ferrous-systems.com/)
+- [Mozilla](https://www.mozilla.org/en-US/)
+
+## Language Server Quick Start
+
+Rust Analyzer is a work-in-progress, so you'll have to build it from source, and
+you might encounter critical bugs. That said, it is complete enough to provide a
+useful IDE experience and some people use it as a daily driver.
+To build rust-analyzer, you need:
-## Quick Start
+* latest stable rust for language server itself
+* latest stable npm and VS Code for VS Code extension
-Rust analyzer builds on Rust >= 1.30.0 (currently in beta) and uses
-the 2018 edition.
+To quickly install rust-analyzer with VS Code extension with standard setup
+(`code` and `cargo` in `$PATH`, etc), use this:
```
-# run tests
-$ cargo test
+# clone the repo
+$ git clone https://github.com/rust-analyzer/rust-analyzer && cd rust-analyzer
-# show syntax tree of a Rust file
-$ cargo run --package ra_cli parse < crates/ra_syntax/src/lib.rs
+# install both the language server and VS Code extension
+$ cargo xtask install
-# show symbols of a Rust file
-$ cargo run --package ra_cli symbols < crates/ra_syntax/src/lib.rs
+# alternatively, install only the server. Binary name is `ra_lsp_server`.
+$ cargo xtask install --server
```
-To try out the language server, see [these
-instructions](./editors/README.md). Please note that the server is not
-ready for general use yet. If you are looking for a Rust IDE that
-works, use [IntelliJ
-Rust](https://github.com/intellij-rust/intellij-rust) or
-[RLS](https://github.com/rust-lang-nursery/rls). That being said, the
-basic stuff works, and rust analyzer is developed in the rust analyzer
-powered editor.
-
-
-## Current Status and Plans
-
-Rust analyzer aims to fill the same niche as the official [Rust
-Language Server](https://github.com/rust-lang-nursery/rls), but uses a
-significantly different architecture. More details can be found [in
-this
-thread](https://internals.rust-lang.org/t/2019-strategy-for-rustc-and-the-rls/8361),
-but the core issue is that RLS works in the "wait until user stops
-typing, run the build process, save the results of the analysis" mode,
-which arguably is the wrong foundation for IDE.
-
-Rust Analyzer is a hobby project at the moment, there's exactly zero
-guarantees that it becomes production-ready one day.
-
-The near/mid term plan is to work independently of the main rustc
-compiler and implement at least simplistic versions of name
-resolution, macro expansion and type inference. The purpose is two
-fold:
-
-* to quickly bootstrap usable and useful language server: solution
- that covers 80% of Rust code will be useful for IDEs, and will be
- vastly simpler than 100% solution.
-
-* to understand how the consumer-side of compiler API should look like
- (especially it's on-demand aspects). If you have
- `get_expression_type` function, you can write a ton of purely-IDE
- features on top of it, even if the function is only partially
- correct. Plugin in the precise function afterwards should just make
- IDE features more reliable.
-
-The long term plan is to merge with the mainline rustc compiler,
-probably around the HIR boundary? That is, use rust analyzer for
-parsing, macro expansion and related bits of name resolution, but
-leave the rest (including type inference and trait selection) to the
-existing rustc.
+For non-standard setup of VS Code and other editors, or if the language server
+cannot start, see [./docs/user](./docs/user).
+
+## Documentation
+
+If you want to **contribute** to rust-analyzer or just curious about how things work
+under the hood, check the [./docs/dev](./docs/dev) folder.
+
+If you want to **use** rust-analyzer's language server with your editor of
+choice, check [./docs/user](./docs/user) folder. It also contains some tips & tricks to help
+you be more productive when using rust-analyzer.
## Getting in touch
-We have a Discord server dedicated to compilers and language servers
-implemented in Rust: [https://discord.gg/sx3RQZB](https://discord.gg/sx3RQZB).
+We are on the rust-lang Zulip!
-## Contributing
+https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0
-See [CONTRIBUTING.md](./CONTRIBUTING.md) and [ARCHITECTURE.md](./ARCHITECTURE.md)
+## Quick Links
+* API docs: https://rust-analyzer.github.io/rust-analyzer/ra_ide/
+* Website: https://rust-analyzer.github.io/
## License
projects / rust.git / blobdiff