spacevim/bundle/nvim-lspconfig-0.1.4/lua/lspconfig/server_configurations/foam_ls.lua

local util = require 'lspconfig.util'
local bin_name = 'foam-ls'
local cmd = { bin_name, '--stdio' }

if vim.fn.has 'win32' == 1 then
  cmd = { 'cmd.exe', '/C', bin_name, '--stdio' }
end

return {
  default_config = {
    cmd = cmd,
    filetypes = { 'foam', 'OpenFOAM' },
    root_dir = function(fname)
      return util.search_ancestors(fname, function(path)
        if util.path.exists(util.path.join(path, 'system', 'controlDict')) then
          return path
        end
      end)
    end,
  },
  docs = {
    description = [[
https://github.com/FoamScience/foam-language-server

`foam-language-server` can be installed via `npm`
```sh
npm install -g foam-language-server
```
]],
  },
}