nvim-lsp-installer must install packages and dependencies locally

[alexhallam]

trafficstars

I would like to know if the devs working on this package know how to integrate with nvim-lsp. I have enjoyed this lsp installer if only it had R support then it would be feature complete for me.

The full issue is documented here.

https://github.com/williamboman/nvim-lsp-installer/pull/81

[randy3k]

It is technically possible to create a sandbox environment for languageserver by installing it in an empty directory and carefully injecting the new path to .libPaths(). However there are not much benefits of doing so because most R users are used to having all packages installed globally.

[alexhallam]

I see what you are saying. I personally would see a lot of value in this sandbox/.libPaths() approach.

[aspeddro]

@alexhallam It's work in Neovim 0.5.1

Install languageserver in some dir, example ~/.local/share/nvim/lsp_servers/r_language_server

install.packages("languageserver", lib = "~/.local/share/nvim/lsp_servers/r_language_server")

Setup LSP

require('lspconfig').r_language_server.setup{
  cmd = { 
    'R', 
    '--slave', 
    '-e', 
    [[
      .libPaths(new = "~/.local/share/nvim/lsp_servers/r_language_server");
      langserver <- languageserver:::LanguageServer$new("localhost", NULL);
      .libPaths(new = Sys.getenv("R_LIBS_USER"));
      langserver$run()
    ]] 
  }
}

[randy3k]

Nice. By the way, why do you need the second .libPaths to add R_LIBS_USER? I think it is in .libPaths in default.

[aspeddro]

.libPaths() with new argument not add a new path, it changes R_LIBS_USER

> .libPaths()
[1] "/home/pedro/.R"     "/usr/lib/R/library"
> .libPaths(new = "~/.local/share/nvim/lsp_servers/r_language_server")
> .libPaths()
[1] "/home/pedro/.local/share/nvim/lsp_servers
/r_language_server"
[2] "/usr/lib/R/library"

[randy3k]

Ai, you are right. Didn't know that before. Maybe this is better?

.libPaths(new = c(
  "~/.local/share/nvim/lsp_servers/r_language_server", 
  Sys.getenv("R_LIBS_USER")))

[aspeddro]

This works but does not completely isolate languageserver

cmd = { 'R', '--slave', '-e',
[[
  .libPaths(new = c("~/.local/share/nvim/lsp_servers/r_language_server", Sys.getenv("R_LIBS_USER")));
  langserver <- languageserver:::LanguageServer$new("localhost", NULL);
  langserver$run()
]]

Note that LSP is listing the languageserver package, but it is installed in "~/.local/share/nvim/lsp_servers/r_language_server"

[randy3k]

But setting .libPaths(new = Sys.getenv("R_LIBS_USER")) means that languageserver no longer is able to find its dependencies in "~/.local/share/nvim/lsp_servers/r_language_server"?

For example, what happens if you uninstall a dependency of languagserver, say lintr from your regular R?

[aspeddro]

But setting .libPaths(new = Sys.getenv("R_LIBS_USER")) means that languageserver no longer is able to find its dependencies in "~/.local/share/nvim/lsp_servers/r_language_server"?

Yes

I did a test, installed all languageserver dependencies in "~/.local/share/nvim/lsp_servers/r_language_server".

backports    crayon    glue            magrittr   purrr        rlang       tibble        yaml
brew         desc      highr           mockery    R.cache      roxygen2    utf8
callr        digest    jsonlite        pillar     R.methodsS3  rprojroot   vctrs
cli          ellipsis  knitr           pkgconfig  R.oo         rstudioapi  withr
collections  evaluate  languageserver  pkgload    R.utils      stringi     xfun
commonmark   fansi     lifecycle       processx   R6           stringr     xml2
cpp11        fs        lintr           ps         rematch2     styler      xmlparsedata

I removed three dependencies from my .libPaths(), R6, xml2 and lintr

> .libPaths()
[1] "/home/pedro/.R"     "/usr/lib/R/library"
> library(xml2)
Error in library(xml2) : there is no package called ‘xml2’
> library(R6)
Error in library(R6) : there is no package called ‘R6’
> library(lintr)
Error in library(lintr) : there is no package called ‘lintr’

LSP is still working

Language client log: /home/pedro/.cache/nvim/lsp.log
 Detected filetype:   r
 
 1 client(s) attached to this buffer: 
 
 Client: r_language_server (id: 1, pid: 402633, bufnr: [3, 4])
 	filetypes:       r, rmd
 	autostart:       true
 	root directory:  /home/pedro
 	cmd:             R --slave -e .libPaths(new = "~/.local/share/nvim/lsp_servers/r_language_server"); langserver <- languageserver:::LanguageServer$new("localhost", NULL); .libPaths(new = Sys.getenv("R_LIBS_USER")); langserver$run() 

I expected LSP to break, because when LSP is executed langserver$run() .libPaths() not contains ~/.local/share/nvim/lsp_servers/r_language_server

[alexhallam]

Thanks @aspeddro for the info! I will update my nvim and give it a try. I will also test it out in lunarvim.