Emacs/Spacemacs integration for Rust: jump to definition doesn't work

Editors and IDEs
1

I have a problem with rust-mode in my spacemacs (running on macOS).
Basically no interesting feature works, most prominently, jump to definition doesn't do anything.

If I do lsp-find-definition on function symbol it says "LSP :: Not found for: myfunction"
The same problem whether the function is defined in the same file or if it's a stdlib function.

I installed the rust layer here: Rust layer
I also installed rust-analyzer and it's placed here: /Users/jumar/.cargo/bin/rust-analyzer
There's a rust-analyzer process running:

ps aux | grep rust-analyzer
jumar            34174   0.0  0.0 33598788    612   ??  S     9:13AM   0:00.00 /Users/jumar/.rustup/toolchains/stable-x86_64-apple-darwin/libexec/rust-analyzer-proc-macro-srv
jumar            34147   0.0  0.6 34032384 212212   ??  Ss    9:13AM   0:09.41 /Users/jumar/.rustup/toolchains/stable-x86_64-apple-darwin/bin/rust-analyzer
This is started automatically after I start spacemacs (I'm not even sure how to re-/start it properly).

The odd thing is that it worked at the very beginning but it's not working anymore.

Any ideas how to troubleshoot and fix this problem?

2

The same is happening in Neovim

3

Try running lsp-describe-session. It should list the running rust-analyzer sessions with their root folders. The root folder should be the directory containing the Cargo.toml for your project, or at most one directory up. If it's a higher-up directory, that's your problem.
Also, there should be a *rust-analyzer::stderr* buffer. Take a look at that and see whether there are any error messages.

4

That seems to be a problem then.
I have a root (git) project directory rust-experiments.
Inside, I have rust-book/chapters - that's the directory with Cargo.toml.
However, rest-analyzer points to the project root (rust-experiments).

Now, I changed this via lsp-workspace-folders-remove and lsp-workspace-folders-add.
Here's the result of lsp-describe-session after the change:

[-] /Users/jumar/workspace/rust/rust-experiments/rust-book/chapters
 `-[-] rust-analyzer:91847
    |-[-] Buffers
    |  `-[+] references_and_borrowing.rs
    `-[+] Capabilities

However, it still doesn't work.
The error buffer doesn't show any error at the moment.

Anything more I should check?

5

After calling flycheck-error-list I noticed this message in the minibuffer:

 references_and_borrowing.rs     1   1 info     unlinked-file file not included in crate hierarchy (lsp)

Then created a new cargo project and opened it in Emacs.
It looked better but still an error when I tried to invoke lsp-definition.

the connected server does not support method textDocument/definition