Deno language server stops working in VS Code | Deno | Page 1

proper solstice Aug 28, 2023, 10:01 PM

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After some random time the language server stops working and I suddenly get code errors like this:
An async function or method in ES5/ES3 requires the 'Promise' constructor. Make sure you have a declaration for the 'Promise' constructor or include 'ES2015' in your '--lib' option.deno-ts(2705)
(Even when I use "deno.enablePaths": [ "src" ] in settings.json)
Increasing "deno.documentPreloadLimit" (to something like 10000) just delays the problem a little bit.

the language server output:

Starting Deno language server...
  version: 1.36.3 (release, x86_64-unknown-linux-gnu)
  executable: /home/nox/.deno/bin/deno
Connected to "Visual Studio Code" 1.81.1
  Auto-resolved configuration file: "file:///home/nox/dev/deno.json"
  Resolved lock file: "file:///home/nox/dev/deno.lock"
Enabling import suggestions for: https://deno.land
Hit the language server document preload limit of 1000 file system entries. You may want to use the "deno.enablePaths" configuration setting to only have Deno partially enable a workspace or increase the limit via "deno.documentPreloadLimit". In cases where Deno ends up using too much memory, you may want to lower the limit.
Server ready.
client asked to cancel request 4, but no such pending request exists, ignoring
client asked to cancel request 7, but no such pending request exists, ignoring
client asked to cancel request 419, but no such pending request exists, ignoring
successfully cancelled request with ID: 627
Unable to send result to client.
client asked to cancel request 697, but no such pending request exists, ignoring

Restarting VS Code fixes that for a short amount of time.
How do I fix this issue?

ember cradle Aug 31, 2023, 11:45 PM

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You should remove that top deno.json

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Since the lsp now preloads all files it will get confused trying to preloads all JavaScript files under dev

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Keep deno.json only inside the projects dirs

proper solstice Aug 31, 2023, 11:57 PM

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ember cradle Keep deno.json only inside the projects dirs

thanks, I moved the deno.json into the src folder:

ember cradle Aug 31, 2023, 11:58 PM

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You have deno.json under dev dir is that the one you moved ?

proper solstice Aug 31, 2023, 11:58 PM

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I didn't know this causes issues, because the whole dev folder is the project, but LSP just shouldn't do anything with static

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it's now under /home/nox/dev/src/deno.json

ember cradle Aug 31, 2023, 11:59 PM

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If dev is actually the whole project , then using enablePath is the correct approach

proper solstice Sep 1, 2023, 12:00 AM

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this is my settings.json:

{
    "deno.enablePaths": [ "src" ],
    // "deno.enable": true,
    "deno.lint": true,
    "deno.unstable": true
}

ember cradle Sep 1, 2023, 12:00 AM

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How many files do you have under src?

proper solstice Sep 1, 2023, 12:00 AM

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4

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deno.json/.lock

ember cradle Sep 1, 2023, 12:02 AM

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So that means enablePaths isn't really working

proper solstice Sep 1, 2023, 12:02 AM

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it works, for 10 minutes

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and then it stops working

ember cradle Sep 1, 2023, 12:04 AM

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It's preloading 1000 files which means is looking at other directories then src

proper solstice Sep 1, 2023, 12:05 AM

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it isn't saying that anymore 🤷‍♀️

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Starting Deno language server...
  version: 1.36.3 (release, x86_64-unknown-linux-gnu)
  executable: /home/nox/.deno/bin/deno
Connected to "Visual Studio Code" 1.81.1
  Auto-resolved configuration file: "file:///home/nox/dev/bingobrawlers.new/deno.json"
  Resolved lock file: "file:///home/nox/dev/bingobrawlers.new/deno.lock"
Enabling import suggestions for: https://deno.land
Server ready.

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(don't mind the path change, it's exactly the same folder just one level deeper)

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but one thing I just did was deleting the deno.lock file, now it's no longer complaining 🤔

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ok, here we go again:

client asked to cancel request 449, but no such pending request exists, ignoring
successfully cancelled request with ID: 468
Unable to send result to client.

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LS broken again and throws random errors at me (which a VS code restart fixes, temporarily) hobbHands

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topaz timber Sep 1, 2023, 1:07 AM

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I've always put deno.json in the project root.

topaz timber Sep 1, 2023, 1:11 AM

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proper solstice

Do you have any files in the project root? Can't tell by the above image.

proper solstice Sep 1, 2023, 9:52 AM

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topaz timber Do you have any files in the project root? Can't tell by the above image.

I moved the deno.json back to the project's root.

topaz timber Sep 1, 2023, 11:27 AM

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proper solstice I moved the deno.json back to the project's root.

Did that help?

proper solstice Sep 1, 2023, 1:15 PM

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so far nothing has changed, the Language Server stops working after a few minutes. gonna code more later today and test it.

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This might be a workaround: #general message but should not be a permanent solution…

ember cradle Sep 1, 2023, 1:52 PM

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Where are the large number of files coming from?

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It might be a bug with enablePaths not working as intended, I'll test it

ember cradle Sep 1, 2023, 2:32 PM

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enablePaths didnt work for me as well

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this issue suggest to use exclude in deno.json as a workaround

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exclude worked for me
deno.json

{
  "exclude": ["path_with_many_files_that_dont_need_lsp"]
}

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oh I didn't link to the issue

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https://github.com/denoland/deno/issues/19802

proper solstice Sep 1, 2023, 3:13 PM

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@ember cradle for the linter I guess? https://deno.land/[email protected]/getting_started/configuration_file#lint

ember cradle Sep 1, 2023, 3:46 PM

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No there is a top level exclude, like the example I showed

proper solstice Sep 1, 2023, 4:14 PM

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oh ok, the manual doesn't mention anything about that

ember cradle Sep 1, 2023, 5:09 PM

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Its a recent feature, I opened an issue for the manual

proper solstice Sep 1, 2023, 6:09 PM

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doesn't seem to work though, I don't get the normal vanilla JS auto completion in my static folder (when I use "deno.enable": true,):

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when I use "deno.enablePaths": [ "src" ], instead I don't get the Deno environment in the src folder:

ember cradle Sep 1, 2023, 6:32 PM

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how did you use exclude ?

proper solstice Sep 1, 2023, 6:43 PM

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/deno.json:

{
    "tasks": {
        "dev": "export DEV=DEV && deno run -A --watch src/main.ts",
        "start": "deno run -A --watch src/main.ts"
    },
    "exclude": [ "static/" ]
}

ember cradle Sep 1, 2023, 6:50 PM

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Exclude means that folder won't have deno lsp enabled in it

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did you want to exclude static ?

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it should be used on the folder where you have thousand of files that don't need the lsp

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which folder do you have that have that many files ?, beacuse the lsp is trying to preload them all

proper solstice Sep 1, 2023, 7:05 PM

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ember cradle did you want to exclude static ?

yes, the static folder contains static files, like html, javascript, css and images

proper solstice Sep 4, 2023, 9:10 PM

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It seems like LSP works properly now:
in .vscode/settings.json I use "deno.enablePaths": [ "src" ]
in deno.json I use "exclude": [ "static/" ] (this seems to be the resolving line)

I don't get shown by VS Code when I edit files in src/ that this is a deno environment (because of deno.enablePaths), but I get full code suggestions by LSP.

#Deno language server stops working in VS Code