Add prettier formatting to tsserver-attached buffers.

jrpotter/lang/typescript.nix

@@ -1,12 +1,21 @@
 { pkgs, ... }:
 {
   home.packages = with pkgs; [
+    nodePackages.prettier
     nodePackages.typescript-language-server
   ];
 
   programs.neovim = {
     nvim-lspconfig = ''
-      require('init.lsp').setup(require('lspconfig').tsserver) {}
+      require('init.lsp').setup(require('lspconfig').tsserver) {
+        on_attach = function(client, bufnr)
+          require('init.lsp').on_attach(client, bufnr)
+          -- Override the default formatter in typescript-language-server.
+          vim.api.nvim_buf_set_keymap(bufnr, 'n', 'gq', "<CMD>PrettierAsync<CR>", {
+            silent = true,
+          })
+        end,
+      }
     '';
   };
 }

jrpotter/neovim/default.nix

@@ -40,7 +40,7 @@ let
       "mfussenegger/nvim-dap";
     config = ''
       require('dap').defaults.fallback.terminal_win_cmd = 'below 10split new'
-      ${config.programs.neovim.nvim-dap};
+      ${config.programs.neovim.nvim-dap}
     '';
   };
 
@@ -123,6 +123,7 @@ in
         pkgs.vimPlugins.cmp_luasnip
         pkgs.vimPlugins.luasnip
         pkgs.vimPlugins.nvim-web-devicons
+        pkgs.vimPlugins.vim-prettier
       ];
       viAlias = true;
       vimAlias = true;

jrpotter/neovim/lua/init/lsp.lua

@@ -1,6 +1,6 @@
 local M = {}
 
-local function on_attach(client, bufnr)
+function M.on_attach(client, bufnr)
   local function set_nnoremap(key, func)
     vim.keymap.set('n', key, func, { buffer = bufnr })
   end
@@ -12,14 +12,14 @@ local function on_attach(client, bufnr)
   set_nnoremap('gr', vim.lsp.buf.rename)
 end
 
-local capabilities = require('cmp_nvim_lsp').default_capabilities()
+M.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
+    opts.on_attach = opts.on_attach or M.on_attach
+    opts.cabailities = opts.cabailities or M.capabilities
     client.setup(opts)
   end
 end