move server config to easy to extend style (nvim-lua#71)

Move servers to new configuration style.

I will probably cover this in a new shorter video, or maybe in combination with something else.
This should hopefully remove  getting so many people making issues about LSPs that they don't want to.

I can update documentation if what is happening is not clear.

Author: tjdevries

.gitignore

@@ -2,3 +2,4 @@ tags
 test.sh
 .luarc.json
 nvim
+plugin/packer_compiled.lua

init.lua

@@ -20,6 +20,9 @@ require('packer').startup(function(use)
 
       -- Useful status updates for LSP
       'j-hui/fidget.nvim',
+
+      -- Additional lua configuration, makes nvim stuff amazing
+      'folke/neodev.nvim',
     },
   }
 
@@ -324,71 +327,60 @@ local on_attach = function(_, bufnr)
 
   -- Create a command `:Format` local to the LSP buffer
   vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
-    if vim.lsp.buf.format then
-      vim.lsp.buf.format()
-    elseif vim.lsp.buf.formatting then
-      vim.lsp.buf.formatting()
-    end
+    vim.lsp.buf.format()
   end, { desc = 'Format current buffer with LSP' })
 end
 
--- Setup mason so it can manage external tooling
-require('mason').setup()
-
 -- Enable the following language servers
--- Feel free to add/remove any LSPs that you want here. They will automatically be installed
-local servers = { 'clangd', 'rust_analyzer', 'pyright', 'tsserver', 'sumneko_lua', 'gopls' }
-
--- Ensure the servers above are installed
-require('mason-lspconfig').setup {
-  ensure_installed = servers,
+--  Feel free to add/remove any LSPs that you want here. They will automatically be installed.
+--
+--  Add any additional override configuration in the following tables. They will be passed to
+--  the `settings` field of the server config. You must look up that documentation yourself.
+local servers = {
+  -- clangd = {},
+  -- gopls = {},
+  -- pyright = {},
+  -- rust_analyzer = {},
+  -- tsserver = {},
+
+  sumneko_lua = {
+    Lua = {
+      workspace = { checkThirdParty = false },
+      telemetry = { enable = false },
+    },
+  },
 }
 
--- nvim-cmp supports additional completion capabilities
+-- Setup neovim lua configuration
+require('neodev').setup()
+--
+-- nvim-cmp supports additional completion capabilities, so broadcast that to servers
 local capabilities = vim.lsp.protocol.make_client_capabilities()
 capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)
 
-for _, lsp in ipairs(servers) do
-  require('lspconfig')[lsp].setup {
-    on_attach = on_attach,
-    capabilities = capabilities,
-  }
-end
+-- Setup mason so it can manage external tooling
+require('mason').setup()
 
--- Turn on lsp status information
-require('fidget').setup()
+-- Ensure the servers above are installed
+local mason_lspconfig = require 'mason-lspconfig'
 
--- Example custom configuration for lua
---
--- Make runtime files discoverable to the server
-local runtime_path = vim.split(package.path, ';')
-table.insert(runtime_path, 'lua/?.lua')
-table.insert(runtime_path, 'lua/?/init.lua')
-
-require('lspconfig').sumneko_lua.setup {
-  on_attach = on_attach,
-  capabilities = capabilities,
-  settings = {
-    Lua = {
-      runtime = {
-        -- Tell the language server which version of Lua you're using (most likely LuaJIT)
-        version = 'LuaJIT',
-        -- Setup your lua path
-        path = runtime_path,
-      },
-      diagnostics = {
-        globals = { 'vim' },
-      },
-      workspace = {
-        library = vim.api.nvim_get_runtime_file('', true),
-        checkThirdParty = false,
-      },
-      -- Do not send telemetry data containing a randomized but unique identifier
-      telemetry = { enable = false },
-    },
-  },
+mason_lspconfig.setup {
+  ensure_installed = vim.tbl_keys(servers),
+}
+
+mason_lspconfig.setup_handlers {
+  function(server_name)
+    require('lspconfig')[server_name].setup {
+      capabilities = capabilities,
+      on_attach = on_attach,
+      settings = servers[server_name],
+    }
+  end,
 }
 
+-- Turn on lsp status information
+require('fidget').setup()
+
 -- nvim-cmp setup
 local cmp = require 'cmp'
 local luasnip = require 'luasnip'