Can't really use LanguageServer in .rmd files

[ChristopheRoyer21]

Describe the bug
First of all, when opening a .rmd file, R LanguageServer doesn't start. To do so, I need to create/open a .R file and then it starts. After working a bit on the R code in the .rmd, lsp often stops working and I don't get any more documentation. So far, it looks perfectly fine in .R file

To Reproduce
Steps to reproduce the behavior:

1. Open a .rmd file
2. You see that LanguageServer hasn't started.
3. Open a .R file
4. You see that LanguageServer has started
5. Write some code chunk in the .Rmd
6. LanguageServer quickly stops working

Expected behavior
The documentation of the variables and functions in a .Rmd work exactly as it does in a .R file

Environment (please complete the following information):

• OS: Windows 10
• VSCode Version 1.41.1
• R Version 3.6.1

[renkun-ken]

Currently, the vscode-R extension is only activated by .R file. We should make it also activated by .Rmd file.

It is strange that language server stops working after you write some code in the .Rmd file. Would you like to share more details? What do you observe to have triggered the language server to stop working? You may turn on r.lsp.debug in vscode settings, reload or restart vscode, and reproduce the problem. If the same problem occurs, please go to View -> Output -> R Language Server and post all logging of language server. I'll take a closer look at what makes langauge server crash.

[ChristopheRoyer21]

I haven't tried it yet, but maybe you could set it to be activated by .Rnw files too (knitr and Sweave).

Two thing happen when I'm using lsp with .Rmd files. I can't always reproduce both of them.

1. Lsp completely crashes (Exit Error 2)
2. It loads without finding anything, even after several seconds/minutes, for everything I hover. It has not happened to me in .R files yet. Maybe it's because of the proximity of the text?

[renkun-ken]

Lsp completely crashes (Exit Error 2)

No logging at View -> Output -> R Language Server at all?

[ChristopheRoyer21]

When I look at View -> Output -> R Language Server I have en (Exit Error 2) and after that nothing else shows up unless I start again into a .R file

[solarchemist]

@renkun-ken Sorry to pile on to a stale issue, but this is the only place in this project where Rnw files are mentioned, so I thought I could ask here first. Also, I've rifled through all the forks, and none of them appear to tackle Rnw files either.

Does vscode-R support Rnw files presently? (I'm pretty sure the answer is no).
Would adding support for Rnw files lie within the scope of the project? If so, may I suggest highlighting that target in the README or similar, as a way to draw the attention of possible contributors or users.

Details of my setup I've got vscode-R 1.5.2 and R LSP client 0.1.10 on VSCodium 1.51.1, and languageserver 0.3.7 (CRAN) installed with R 3.6.2. I opened an Rmd file, and vscode-R kicked right into gear, with boxes on hover, code chunk highlighting and Run chunk | Run above commands above each chunk. The log shows R Language Server (569) started and nothing else. So it seems my setup is good.

But all the goodness disappears as soon as you change the Rmd chunks into Rnw-formatted chunks. *sad noises*

[renkun-ken]

You are right. vscode-R does not have support for Rnw. Neither does languageserver.

[solarchemist]

Oh, so it goes deeper than just vscode-R. Thanks for the clarification!

[renkun-ken]

I guess supporting Rnw files is indeed within the scope of vscode-R and language server but obviously there's a lack of community support for such format. Contributions are always welcome.

[renkun-ken]

Feel free to reopen if the problem still persists.