how to run "Show LSP Logs" in emacs

[lolbinarycat]

This paragraph confuses me

To fully capture LSP messages between the editor and the server, run the rust-analyzer: Toggle LSP Logs command and check Output > Rust Analyzer Language Server Trace.

Where do I run this command? It's not a code action (I tried), and I'm not aware of any other place to send string commands to the language server.

If someone could tell me the emacs command to run here, that would be greatly appreciated.

[ChayimFriedman2]

It's a VSCode command implemented in the VSCode TypeScript client. It's not something of the server.

[lolbinarycat]

That's definitely an issue with the docs then, as there's no indication that its editor-specific

[ChayimFriedman2]

Generally the docs could do a better job distinguishing VSCode-specific things, but "command" specifically refers to a VSCode command (although it may still be supported by the server, but it will also need supported from the client outside of bare LSP).

[lolbinarycat]

"command" can mean many things, and it's definitely not obvious they mean a VSCode command, especially if the reader has never used VSCode.

[lnicola]

You can run the server using RA_LOG=lsp_server=debug RA_LOG_FILE=r-a.log, but we should definitely have that in the docs. If you set those before starting emacs, they should propagate to the server.

Your LSP client might have a better way, you should check the client docs.

[flodiebold]

I agree that we should have an "in VSCode" there, like in the preceding paragraph. Feel free to make a PR.

If you're using lsp-mode, you can run lsp-toggle-trace-io to enable tracing LSP communication in Emacs. It will show up in a *lsp-log: rust-analyzer:xxx* buffer.