How to debug / troubleshoot LSP "not in project or it is blacklisted." in lsp-mode?

Question

Recently LSP has stopped working for me.

I'm getting this message for all files in my project.

LSP :: example_filename.c not in project or it is blacklisted.

How can I investigate this, if it's blacklisted, how can I reset the blacklist?

LSP is a protocol so it neither works nor can stop working. You're presumably talking about some implementation of this protocol, so please say which implementation you're using (probably lsp-mode or eglot on Emacs's side, and some LSP server on the other side but I can't begin to guess about that other side). — Stefan, Commented Dec 17, 2019 at 15:32
The question is tagged lsp-mode, but I could have included that in the title (will edit). — ideasman42, Commented Dec 17, 2019 at 23:37
I had to manually add the folder to the workspace by lsp-workspace-folders-add — capitrane, Commented Feb 3, 2021 at 9:08

ideasman42 · Accepted Answer · 2022-03-22 10:41:07Z

16

I somehow managed to blacklist my own project, removing .lsp-session-v1 resolved the issue.

This could be located in either:

Although I might have been able to solve this using lsp-workspace-blacklist-remove

answered Dec 17, 2019 at 5:56

ideasman42

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I don't have folder name called ~/.emacs.d/.lsp-session-* could it be located in somewhere else?
– alper
Commented Mar 22, 2022 at 9:20
Updated answer to show two possible locations.
– ideasman42
Commented Mar 22, 2022 at 10:41
I was able to find a file called ~/var/lsp/session.el , could it be the related file?
– alper
Commented Mar 22, 2022 at 11:25

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Webdev Tory · Accepted Answer · 2021-07-06 17:15:52Z

5

@capitrane comment had the answer for me: M-x lsp-workspace-folders-add from within the project, and it started to work.

answered Jun 16, 2021 at 17:45

Webdev Tory

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Please don't add "thank you" as an answer. Instead, vote up the answers that you find helpful. - From Review
– erikstokes
Commented Jun 16, 2021 at 23:02
1

There was no such answer -- it was an old comment which deserves to be an answer.
– Webdev Tory
Commented Jun 17, 2021 at 21:15
1

But you shouldn't just copy the comment: make it useful for naive users. E.g. I don't know much about lsp, so I have no idea whether what you quote is a function or a variable. I also have no idea how exactly to call the function/set the variable to add the folder. I can guess and I know how to get around the docs to figure out how to use it, but a noob might not. So by all means, credit @capitrane, make his/her comment an answer, but don't just copy the comment: you spent some time to make it work for you, so explain it in enough detail to enable a naive user to use it.
– NickD
Commented Jun 25, 2021 at 14:16
Answer updated appropriately.
– Webdev Tory
Commented Jul 6, 2021 at 17:17

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Greg Minshall · Accepted Answer · 2022-02-05 03:10:24Z

1

M-x lsp works for me. ("Entry point for the server startup.")

answered Feb 5, 2022 at 3:10

Greg Minshall

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3 Answers 3