upgrading vls from 0.5 to 0.6 breaks atom-ide-vue

[aminya]

• I have searched through existing issues
• I have read through docs
• I have read FAQ -> This link does not exist.
• I have tried restarting VS Code or running Vetur: Restart VLS -> N/A

Info

• Platform: Win 10
• Vetur version: -> Vls 0.6
• VS Code version: N/A

atom-langaugeclient has these dependencies:
"vscode-jsonrpc": "5.0.1",
"vscode-languageserver-protocol": "3.15.3",
"vscode-languageserver-types": "3.15.1"

Problem

Hi. The atom-ide-vue maintainer here. I recently updated vls from 0.5 to 0.6, but that broke the server and the plugin (datatips, autocomplete, etc). So I had to downgrade to 0.5.

Here is the code for atom-ide-vue. As you see, it is minimal because most of the work is handled by atom-languageclient which uses vscode-languageserver underneath.
https://github.com/atom-ide-community/atom-ide-vue/blob/master/lib/main.js

I could not find a changelog for vls to see the changes.

These are the kind of errors that we get:

We have an issue for it: atom-community/atom-ide-vue#35 (comment)

Reproducible Case

• Install Atom.
• apm install language-vue atom-ide-base atom-ide-javascript
• git clone https://github.com/atom-ide-community/atom-ide-vue
• cd atom-ide-vue
• npm install
• npm install vls@0.6
• apm link .
• cd spec/project/hello-world
• atom .
• CTRL+SHIFT+F5 to open dev tools
• open App.vue

[yoyo930021]

I will take a look.

[yoyo930021]

Fixed in e9dc769.

I expect workspaceFolders: null in InitializeParams when client no support workspace.
but atom-languageclient send workspaceFolders: [].
https://github.com/atom-ide-community/atom-languageclient/blob/bf599f88726bb68f58932f18d03ba6faffa23d4e/lib/auto-languageclient.ts#L126

And when it's normal, it should send workspaceFolders: [{ name: '', uri: 'xxx/xxx' }].
I also found that it starts multiple clients when atom workspaces.
This does not seem to match the LSP spec.

Vetur will check InitializeParams.capabilities.workspace.workspaceFolder in vls v0.6.3 for fix it.

[aminya]

Thank you so much! @yoyo930021 I tested it, and now it works as expected!

I expect workspaceFolders: null in InitializeParams when client no support workspace.
but atom-languageclient send workspaceFolders: [].

Is this nullness part of the spec? or it should be []? or it is not specified?

I can send a PR to atom-languageclient to fix these.

CC: @UziTech

[yoyo930021]

Thank you so much! @yoyo930021 I tested it, and now it works as expected!

I expect workspaceFolders: null in InitializeParams when client no support workspace.
but atom-languageclient send workspaceFolders: [].

Is this nullness part of the spec? or it should be []? or it is not specified?

I can send a PR to atom-languageclient to fix these.

https://microsoft.github.io/language-server-protocol/specifications/specification-current/#initialize

[aminya]

Thanks! I will fix it in a PR.