Rust LSP not working

[the-ssd]

Summary

lsp for rust doesn't work
this also happens when you run 'rust-analyzer' but not when running 'rls'
error when running rust-analyzer

error: unknown proxy name: 'rust-analyzer'; valid proxy names are 'rustc', 'rustdoc', 'cargo', 'rust-lldb', 'rust-gdb', 'rust-gdbgui', 'rls', 'cargo-clippy', 'clippy-driver', 'cargo-miri', 'rustfmt', 'cargo-fmt'

error is similar to the error in the log

Reproduction Steps

I tried this:

1. update with rustup
2. update system

I expected this to happen:
working lsp

Instead, this happened:
only grammar is working

Helix log

~/.cache/helix/helix.log

2023-04-01T09:20:39.025 helix_loader [DEBUG] Located configuration folders: []
2023-04-01T09:20:39.036 helix_view::clipboard [INFO] Using xclip to interact with the system and selection (primary) clipboard
2023-04-01T09:20:39.106 helix_lsp::transport [INFO] -> {"jsonrpc":"2.0","method":"initialize","params":{"capabilities":{"textDocument":{"codeAction":{"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline">
2023-04-01T09:20:39.107 helix_view::editor [DEBUG] editor status: Loaded 1 files.
2023-04-01T09:20:39.108 helix_view::document [DEBUG] id 1 modified - last saved: 0, current: 0
2023-04-01T09:20:39.110 helix_lsp::transport [ERROR] err <- "error: unknown proxy name: 'rust-analyzer'; valid proxy names are 'rustc', 'rustdoc', 'cargo', 'rust-lldb', 'rust-gdb', 'rust-gdbgui', 'rls', 'cargo-clippy', 'clippy-driver', 'cargo-miri', 'rustfmt', 'cargo-f>
2023-04-01T09:20:39.111 helix_lsp [ERROR] failed to initialize language server: server closed the stream
2023-04-01T09:20:39.111 helix_lsp::transport [ERROR] err: <- StreamClosed
2023-04-01T09:20:39.115 helix_term::application [DEBUG] received editor event: LanguageServerMessage((0, Notification(Notification { jsonrpc: None, method: "exit", params: None })))
2023-04-01T09:20:39.115 helix_view::editor [DEBUG] editor status: Language server exited

Platform

Linux Opensuse

Terminal Emulator

Konsole

Helix Version

helix 22.12

[David-Else]

Try this, get rid of any old versions of rust analyzer that might be hanging around first:

#!/bin/bash

bin_install_folder=/usr/local/bin # wherever you usually store your binary files, must be able to run from the terminal and be in the $PATH
rustup component add rust-analyzer
sudo ln -s "$(rustup which rust-analyzer)" $bin_install_folder/rust-analyzer

Rustup is going to fix this problem in the next release:

rust-lang/rustup#3022 (comment)

[glennDittmann]

I have the same issue on MacOS with Alacritty. Any solutions for this so far?

2023-05-04T21:46:55.084 helix_vcs [ERROR] failed to obtain current head name for /path/to/rust/file
2023-05-04T21:46:55.093 helix_lsp::transport [ERROR] err <- "error: unknown proxy name: 'rust-analyzer'; valid proxy names are 'rustc', 'rustdoc', 'cargo', 'rust-lldb', 'rust-gdb', 'rust-gdbgui', 'rls', 'cargo-clippy', 'clippy-driver', 'cargo-miri', 'rustfmt', 'cargo-fmt'\n"
2023-05-04T21:46:55.093 helix_lsp [ERROR] failed to initialize language server: server closed the stream
2023-05-04T21:46:55.093 helix_lsp::transport [ERROR] err: <- StreamClosed

[kirawi]

Have you tried the above solution or updating your rustup installation?

[glennDittmann]

Yes my bad ! After adding the link and then updating rustup it was resolved. Don't know if the first was necessary though. Thanks for pointing out updating.. Sometimes it can be this easy...

[David-Else]

I updated the WIKI, you don't need to make any symbolic links with the new version of Rustup: https://github.com/helix-editor/helix/wiki/How-to-install-the-default-language-servers#rust