doomemacs/modules/lang/rust

:lang rust

• Description
  • Maintainers
  • Module flags
  • Packages
  • Hacks
  • Changelog
• Installation
  • Other Requirements
• Usage
  • LSP support (rls or rust-analyzer)
  • Format on save
  • Keybinds
• Configuration
  • Enable RLS by default
  • Enabling eglot support for Rust
• Troubleshooting
  • error[E0670]: `async fn` is not permitted in the 2015 edition
• Frequently asked questions
• Appendix

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Description   unfold

This module adds support for the Rust language and integration for its tools, e.g. cargo.

• Code completion (racer or an LSP server)
• Syntax checking (flycheck)
• LSP support (for rust-analyzer and rls) (rustic)
• Snippets

Maintainers

• @hlissner

Become a maintainer?

Module flags

+lsp

Enable LSP support for rustic-mode. Requires :tools lsp and a langserver (supports rust-analyzer and rls).

Packages

• rustic
• racer unless +lsp

Hacks

• rustic has been modified not to automatically install lsp-mode or eglot if they're missing. Doom expects you to have enabled the :tools lsp module yourself.

TODO Changelog

This module does not have a changelog yet.

Installation

Enable this module in your doom! block.

This module requires rust, which can be acquired through rustup:

curl https://sh.rustup.rs -sSf | sh

Note that when the Rust language has updates, you are to run rustup such that it doesn't upgrade itself:

rustup update --no-self-update

Other Requirements

• If :editor format is enabled, you'll need rustfmt: $ rustup component add rustfmt-preview.
• Users without +lsp enabled will need racer: $ cargo +nightly install racer (with requires rust nightly edition).

• Users with +lsp enabled will need:

  • rust-analyzer or rls

• Using the following commands requires:

  • cargo-process-check: $ cargo install cargo-check
  • cargo-process-clippy: $ rustup component add clippy-preview

TODO Usage

🔨 This module's usage documentation is incomplete. Complete it?

LSP support (rls or rust-analyzer)

This module supports LSP integration. For it to work you'll need:

1. Either rust-analyzer or the Rust Language Server installed (e.g. through your OS package manager).
2. The :tools lsp module enabled.
3. The +lsp flag on this module enabled.

Format on save

Enable :editor format +onsave to get formatting on save with rustfmt. No additional configuration is necessary.

Keybinds

Binding	Description
<localleader> b a	cargo audit
<localleader> b b	cargo build
<localleader> b B	cargo bench
<localleader> b c	cargo check
<localleader> b C	cargo clippy
<localleader> b d	cargo doc
<localleader> b n	cargo update
<localleader> b o	cargo outdated
<localleader> b r	cargo run
<localleader> t a	cargo test
<localleader> t t	run current test

TODO Configuration

🔨 This module's configuration documentation is incomplete. Complete it?

Enable RLS by default

If both rls and rust-analyzer are present on your system, rust-analyzer is used by default. Modify rustic-lsp-server to change the default:

;; in $DOOMDIR/config.el
(after! rustic
  (setq rustic-lsp-server 'rls))

Enabling eglot support for Rust

Doom's :tools lsp module has an +eglot flag. Enable it and this module will use eglot instead.

Troubleshooting

Report an issue?

error[E0670]: `async fn` is not permitted in the 2015 edition

You may be seeing this error, despite having edition = "2018" in your Cargo.toml. This error actually originates from rustfmt, which the LSP server tries to invoke on save (if you have rustic-format-on-save or :editor format enabled).

To fix this your project needs a rustfmt.toml with edition = "2018" in it.

Frequently asked questions

This module has no FAQs yet. Ask one?

TODO Appendix

🔨 This module has no appendix yet. Write one?