nixpkgs/neovim: use only gofmt if gopls is not available

.config/nixpkgs/neovim/lsp.lua

@@ -17,9 +17,6 @@ if vim.fn.executable("node_modules/.bin/eslint") == 1 then
   table.insert(null_ls_sources, null_ls.builtins.code_actions.eslint_d)
 end
 
-if vim.fn.executable("gofmt") == 1 then
-  table.insert(null_ls_sources, null_ls.builtins.formatting.gofmt)
-end
 
 if vim.fn.executable("shellcheck") == 1 then
   table.insert(null_ls_sources, null_ls.builtins.diagnostics.shellcheck)
@@ -33,6 +30,14 @@ if vim.fn.executable("deno") == 1 then
   table.insert(null_ls_sources, null_ls.builtins.formatting.deno_fmt);
 end
 
+if vim.fn.executable("gopls") == 1 then
+  nvim_lsp.gopls.setup({
+    on_attach = on_attach,
+  });
+elseif vim.fn.executable("gofmt") == 1 then
+  table.insert(null_ls_sources, null_ls.builtins.formatting.gofmt)
+end
+
 if vim.fn.executable("node_modules/.bin/tsc") == 1 then
   -- this provides auto-import on completion, among other things
   local ts_utils = require("nvim-lsp-ts-utils")