Have on_attach/capabilites associated with each LSP.

jrpotter/neovim/lang/lean.nix

@@ -8,7 +8,7 @@ let
       "Julian/lean.nvim";
     config = ''
       lua << EOF
-      require('lean').setup {
+      require('init.lsp').setup(require('lean')) {
         abbreviations = { builtin = true },
         mappings = true,
       }

jrpotter/neovim/lang/nix.nix

@@ -2,7 +2,7 @@
 {
   programs.neovim = {
     nvim-lspconfig = ''
-      require('lspconfig').nil_ls.setup {}
+      require('init.lsp').setup(require('lspconfig').nil_ls) {}
     '';
 
     extraPackages = [ pkgs.nil ];

jrpotter/neovim/lua/init/lsp.lua

@@ -0,0 +1,22 @@
+local M = {}
+
+local function on_attach(client, bufnr)
+  local opts = { buffer = bufnr }
+  vim.keymap.set('n', 'gq', function()
+    vim.lsp.buf.format { async = true }
+  end, opts)
+end
+
+local capabilities = require('cmp_nvim_lsp').default_capabilities()
+
+function M.setup(client)
+  -- Return a nested function so that we can continue invoking `setup` in the
+  -- familiar way.
+  return function(opts)
+    opts.on_attach = opts.on_attach or on_attach
+    opts.cabailities = opts.cabailities or capabilities
+    client.setup(opts)
+  end
+end
+
+return M

jrpotter/neovim/lua/init/lua.lua

@@ -1,7 +1,7 @@
 local M = {}
 
 function M.nvim_lspconfig()
-  require('lspconfig').lua_ls.setup {
+  require('init.lsp').setup(require('lspconfig').lua_ls) {
     -- Provide completions, analysis, and location handling for plugins on the
     -- vim runtime path.
     -- https://github.com/neovim/nvim-lspconfig/blob/48347089666d5b77d054088aa72e4e0b58026e6e/doc/server_configurations.md#lua_ls

jrpotter/neovim/lua/init/python.lua

@@ -26,7 +26,7 @@ function M.nvim_dap(options)
 end
 
 function M.nvim_lspconfig()
-  require('lspconfig').pylsp.setup {
+  require('init.lsp').setup(require('lspconfig').pylsp) {
     settings = {
       pylsp = {
         -- `flake8` currently fails in some cases. Prefer the default set of