Nvim-lspconfig: LspInstall not working Windows

[RefusesNames]

• nvim --version: NVIM v0.5.0-705-g9f704c88a
• nvim-lsp version(commit hash):
  How can I see that? nvim-lspconfig has the commit 60133c47e0fd82556d7ca092546ebfa8d047466e
• :checkhealth result:
  configuration ok, performance ok, remote plugins ok, clipboard ok, python2 and 3 ok, virtualenv ok, node.js ok, perl and ruby provider missing
• What language server(If the problem is related to a specific language server): All of them (vimls as an example)
• Operating system/version: Windows 10 Pro (Version 2004)
• Terminal name/version: PowerShell core (7.1.0-preview.7)
• $TERM: xterm-256color

How to reproduce the problem from neovim startup

:LspInstall vimls

Actual behaviour

Message: "Installation requires "sh", "npm", "mkdir"

Expected behaviour

Installation of the language server

[tarasyarema]

I guess the first think to do is look here: https://github.com/neovim/nvim-lspconfig/blob/60133c47e0fd82556d7ca092546ebfa8d047466e/lua/nvim_lsp/util.lua#L378

It seems like the only system implemented are the ones that have sh, npm and mkdir. I think that this
https://github.com/neovim/nvim-lspconfig/blob/60133c47e0fd82556d7ca092546ebfa8d047466e/lua/nvim_lsp/util.lua#L390
can be easily changed to something that uses Windows Powershell:

local cmd = io.popen("powershell -command -", "w")

local install_script = ([[
    mkdir -p "{{install_dir}}"
    cd "{{install_dir}}"
    && npm init -y
    npm install {{packages}} --no-package-lock --no-save --production
    {{post_install_script}}
    ]]):gsub("{{(%S+)}}", install_params)

cmd:write(install_script)
cmd:close()

I had the same problem, but I went for the manual installation. If some maintainer approves I can try to implement this.

[lithammer]

I think the idea is to completely drop the installers. See https://github.com/neovim/nvim-lspconfig/issues/334.

[tarasyarema]

I was just reading that issue jaja