Theia: How to include php-language-server in theia

[ankitmithu007]

Can someone guide me on how to include php-language-server in thiea?
I am using theia in my project and the IDE has to support php language(and also other languages).
Thanks in advance.

[akosyakov]

@ankitmithu007 You should add @theia/php as a dependency to your app, like here: https://github.com/theia-ide/theia-php-extension/blob/master/browser-app/package.json

And make sure that the tools needed for php are installed, for example composer. Here is Dockerfile which is used to develop php extension: https://github.com/theia-ide/theia-php-extension/blob/fc321884b1da2f805c187b2722e1c0068445076c/Dockerfile.gitpod#L29

@meysholdt can correct me if I'm wrong

[ankitmithu007]

Thanks, @akosyakov for such a quick response.
I have a question :

In this case, I was lucky to have a theia-extesnion for php.
Say if there is language xyz and LSP for the language(xyz) is present.
Is there any documentation to create a theia-extension for present LSP?

[akosyakov]

@ankitmithu007 Unfortunately, there is no such doc yet. We should add it, let's keep this issue for it.

But you can look at language extensions in this repo, as cpp, java, typescript/javascript, python, as well as at external language extensions: https://github.com/topics/theia-language-extension

[ankitmithu007]

@akosyakov
I was trying to build an extension for few LSP.
I kept on getting the below error for each theia-lsp-extension while building:

Can you please help me out?

[akosyakov]

Please stick to typescript 2.9.x for now, we did not migrate 3.x yet or enable skipLibCheck in your tsconfig.

[ankitmithu007]

Thanks, @akosyakov the typescript error got fixed.
But I am getting Promise.all error when I try building(running yarn from root folder) the extension.

[akosyakov]

Please enable skipLibCheck in tsconfig for now: https://github.com/theia-ide/theia/issues/2614

It also will speed up a build since typescript won't check d.ts files of your dependencies which are usually correct.

[AndersDala]

Adding a (perhaps) related question here, once you have added a theia extension according to the examples - do you have any hints on how to troubleshoot the stdio based versions?

Standalone using sockets worked fine, but the pipe/stdio version fails for some reason. Most likely due to some unwanted printout happening (?). But any ideas where to troubleshoot from within theia? I can already see the "java-side-of-things". The language server is an xtext-based one.

Thanks in advance for any pointers or advice. :-)

[ankitmithu007]

@akosyakov
I have already added skipLibCheck in my tsconfig file but still, I am getting the error.

When I removed "@theia/monaco" from my pakcage.json of extension folder, it started working.
Can you please explain what's happening here?

Let's take a step back here and let me try to explain what I am trying to achieve.
I am trying to mimic @theia/json in hello-world-extension by just copying and pasting the code.

In package.json of @theia/json , @theia/monaco is present and it's working fine.
When I am trying to mimic the same code it's giving me the error.

[akosyakov]

ok, I've got it wrong, I was thinking that it is just TS compilation errors, but I assume you get it from webpack. Could you check which tool reports it?

We are using vscode-languageclient for bridging LSP and Monaco, but it relies on vscode namespace at runtime. We prvode an implementation of vscode namespace with Monaco but it should be properly hooked during bundling with Wepback. It should actually happen automatically since we generate webpack config with adjusted module resolution: https://github.com/theia-ide/theia/blob/842196b5b18ce340f6b1beaea9e9a7ddbe2fd96f/dev-packages/application-manager/src/generator/webpack-generator.ts#L129

I wonder how do you get it. Could it be that you are using newer @theia/monaco package than @theia/cli? Could you make sure to use the same version?

[ankitmithu007]

@akosyakov
Nice catch.
You are right, @theia/monaco and @theia/cli version were not in sync.
After changing the version it's working fine.
Thanks.