a bit sloppy but working

lua/config/lsp.lua

@@ -0,0 +1,64 @@
+local util = require 'lspconfig.util'
+
+local root_files = {
+  '.luarc.json',
+  '.luacheckrc',
+  '.stylua.toml',
+  'selene.toml',
+}
+return {
+  default_config = {
+    cmd = { 'lua-language-server' },
+    filetypes = { 'lua' },
+    root_dir = function(fname)
+      return util.root_pattern(unpack(root_files))(fname) or util.find_git_ancestor(fname)
+    end,
+    single_file_support = true,
+    log_level = vim.lsp.protocol.MessageType.Warning,
+    settings = { Lua = { telemetry = { enable = false } } },
+  },
+  docs = {
+    description = [[
+https://github.com/sumneko/lua-language-server
+Lua language server.
+`lua-language-server` can be installed by following the instructions [here](https://github.com/sumneko/lua-language-server/wiki/Build-and-Run).
+The default `cmd` assumes that the `lua-language-server` binary can be found in `$PATH`.
+If you primarily use `lua-language-server` for Neovim, and want to provide completions,
+analysis, and location handling for plugins on runtime path, you can use the following
+settings.
+Note: that these settings will meaningfully increase the time until `lua-language-server` can service
+initial requests (completion, location) upon starting as well as time to first diagnostics.
+Completion results will include a workspace indexing progress message until the server has finished indexing.
+```lua
+require'lspconfig'.sumneko_lua.setup {
+  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 = {
+        -- Get the language server to recognize the `vim` global
+        globals = {'vim'},
+      },
+      workspace = {
+        -- Make the server aware of Neovim runtime files
+        library = vim.api.nvim_get_runtime_file("", true),
+      },
+      -- Do not send telemetry data containing a randomized but unique identifier
+      telemetry = {
+        enable = false,
+      },
+    },
+  },
+}
+```
+See `lua-language-server`'s [documentation](https://github.com/sumneko/lua-language-server/blob/master/locale/en-us/setting.lua) for an explanation of the above fields:
+* [Lua.runtime.path](https://github.com/sumneko/lua-language-server/blob/076dd3e5c4e03f9cef0c5757dfa09a010c0ec6bf/locale/en-us/setting.lua#L5-L13)
+* [Lua.workspace.library](https://github.com/sumneko/lua-language-server/blob/076dd3e5c4e03f9cef0c5757dfa09a010c0ec6bf/locale/en-us/setting.lua#L77-L78)
+]],
+    default_config = {
+      root_dir = [[root_pattern(".luarc.json", ".luacheckrc", ".stylua.toml", "selene.toml", ".git")]],
+    },
+  },
+}