navigator.lua/lua/navigator/lspclient/sumneko_lua.lua

local vfn = vim.fn

local on_attach = require('navigator.lspclient.attach').on_attach

local library = {}
local function add(lib)
  for _, p in pairs(vfn.expand(lib, false, true)) do
    p = vim.loop.fs_realpath(p)
    if p then
      library[p] = true
    end
  end
end
local function sumneko_lua()
  -- add runtime
  -- add plugins it may be very slow to add all in path
  add('$VIMRUNTIME')
  -- add your config
  -- local home = vfn.expand("$HOME")
  add(vfn.stdpath('config'))

  library[vfn.expand('$VIMRUNTIME/lua')] = true
  library[vfn.expand('$VIMRUNTIME/lua/vim')] = true
  library[vfn.expand('$VIMRUNTIME/lua/vim/lsp')] = true

  return {
    cmd = { 'lua-language-server' },
    filetypes = { 'lua' },
    on_attach = on_attach,
    flags = { allow_incremental_sync = true, debounce_text_changes = 500 },
    settings = {
      Lua = {
        runtime = {
          -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
          version = 'LuaJIT',
        },
        diagnostics = {
          enable = true,
          -- Get the language server to recognize the `vim` global
          globals = { 'vim', 'describe', 'it', 'before_each', 'after_each', 'teardown', 'pending' },
        },
        completion = { callSnippet = 'Both' },
        workspace = {
          -- Make the server aware of Neovim runtime files
          library = library,
          checkThirdParty = false,
          maxPreload = 1000,
          preloadFileSize = 40000,
        },
        telemetry = { enable = false },
      },
    },
    on_new_config = function(cfg, root)
      local libs = vim.schedule(function()
        vim.tbl_deep_extend('force', {}, library)
      end)
      libs[root] = nil
      cfg.settings.Lua.workspace.library = libs
      return cfg
    end,
  }
end

return {
  sumneko_lua = sumneko_lua,
}