Is it possible to run r-languageserver with JupyterHub in separate environments?

[jrouly]

I'm not 100% sure if this is the correct repository to file this issue so please forgive me in advance if I've bungled this.

I'm trying to run JupyterHub with an R kernel, using Conda (micromamba) to manage environments, with an R language server.

The steps I've followed are essentially:

1. Install jupyterlab, jupyterhub into the jupyter environment
2. Install R, r-irkernel, r-languageserver into the R environment
3. Activate the R environment and invoke IRkernel::installspec(user = FALSE, prefix = '$JUPYTER_HOME')

This works great and sets up an R kernel. However, despite having installed r-languageserver (which I can confirm by running library(languageserver) in a notebook), JupyterLab is unable to detect the R language server. It complains:

No language server for r detected

and recommends I troubleshoot finding Rscript on the PATH. It is on the PATH (in the R environment), and JupyterLab is clearly aware of this since it's able to run notebooks on the R kernel just fine. And yet, it cannot find the language server.

[randy3k]

I think jupyter-lsp may be a better place to ask just a question because it is related to the environmental setup of jupyterhub.

[jrouly]

Thanks, @randy3k. I went ahead and filed an issue over there. I'll call this resolved over here :)