Implementation language server

[kgtkr]

#117

This is a rewrite in java of something I made in the past
https://github.com/kgtkr/processing-language-server

client:
https://github.com/kgtkr/processing-language-server-vscode/tree/integrate-pls

[benfry]

Very cool, thanks for looking into it and even producing this PR. I haven't had a chance to spend enough time looking into it, but hope to soon. Sorry for the delay!

[sampottinger]

Thanks for this @kgtkr! Certainly keeping an eye on this PR. Exciting times!

[benfry]

I'm trying to keep the 4.0.2 release to bug fixes, but hope to get this incorporated in a release soon. Apologies for the continued delay; just overbooked here.

[benfry]

@kgtkr Can you create a fresh PR with only the source code changes, skipping the changes to other build files and the rest? (i.e. just everything inside processing/mode/java) and I'll take care of incorporating the other jar/build/ignore file changes separately. Thanks!

[benfry]

Never mind that; just gonna merge and try to roll those files back… 

[benfry]

Ok, we're now merged with a few changes… This will be part of Processing 4.1 (arriving later today or Monday).

A few things were moved around, and the main() is now part of processing.mode.java.lsp.PdeLanguageServer.

@kgtkr I'm still using the 0.12.0 version of lsp4j that you had included, but the latest seems to be 0.19. Was there a reason you used the older version, or is it just because you wrote the code a while back and hadn't bothered to update to 0.19?

Still lots to be done, but good to have these pieces in place so that others might be able to help improve.

[kgtkr]

@benfry
There's no reason to use an older version. i forgot to update the library.

[benfry]

Ok thanks, bumping it to 0.19 in that case.

[kgtkr]

I've tried Processing4.1 but it seems to be missing a dependency
According to ivy, the full list of required dependencies is below. However, if add only gson, an error message will appear, but it seems to work.

[ivy:retrieve]  found org.eclipse.lsp4j#org.eclipse.lsp4j;0.19.0 in public
[ivy:retrieve]  found org.eclipse.lsp4j#org.eclipse.lsp4j.generator;0.19.0 in public
[ivy:retrieve]  found org.eclipse.lsp4j#org.eclipse.lsp4j.jsonrpc;0.19.0 in public
[ivy:retrieve]  found com.google.code.gson#gson;2.9.1 in public
[ivy:retrieve]  found org.eclipse.xtend#org.eclipse.xtend.lib;2.28.0 in public
[ivy:retrieve]  found org.eclipse.xtext#org.eclipse.xtext.xbase.lib;2.28.0 in public
[ivy:retrieve]  found com.google.guava#guava;30.1-jre in public
[ivy:retrieve]  found com.google.guava#failureaccess;1.0.1 in public
[ivy:retrieve]  found com.google.guava#listenablefuture;9999.0-empty-to-avoid-conflict-with-guava in public
[ivy:retrieve]  found com.google.code.findbugs#jsr305;3.0.2 in public
[ivy:retrieve]  found org.checkerframework#checker-qual;3.5.0 in public
[ivy:retrieve]  found com.google.errorprone#error_prone_annotations;2.3.4 in public
[ivy:retrieve]  found com.google.j2objc#j2objc-annotations;1.3 in public
[ivy:retrieve]  found org.eclipse.xtend#org.eclipse.xtend.lib.macro;2.28.0 in public

[benfry]

Nuts, ok—with gson.jar in there it's working for me. But I don't have your client running so I can't say whether everything works. Can you test and let me know? When you confirm, I can post 4.1.1.

If there are new issues that need to be fixed, go ahead and open a new issue so that we can track and reference them properly.

[kgtkr]

I'm testing using this I made in the past
https://github.com/kgtkr/processing-language-server-vscode

I've verified that formatting, error reporting and completion work on the main branch. Thank you

[benfry]

Excellent, thanks. Will re-post…

[benfry]

Ok, 4.1.1 now on the releases page: https://github.com/processing/processing4/releases

[kgtkr]

Thank you. I was able to confirm that it works with the latest release.

[benfry]

Great, thanks!