fix(neovim): added auto-organize go imports

modules/editors/neovim.nix

@@ -140,7 +140,33 @@ in
               };
               lua-ls.enable = true;
               html.enable = true;
-              gopls.enable = true;
+              gopls = {
+                enable = true;
+                onAttach.function = ''
+                  vim.api.nvim_create_autocmd("BufWritePre", {
+                    pattern = "*.go",
+                    callback = function()
+                      local params = vim.lsp.util.make_range_params()
+                      params.context = {only = {"source.organizeImports"}}
+                      -- buf_request_sync defaults to a 1000ms timeout. Depending on your
+                      -- machine and codebase, you may want longer. Add an additional
+                      -- argument after params if you find that you have to write the file
+                      -- twice for changes to be saved.
+                      -- E.g., vim.lsp.buf_request_sync(0, "textDocument/codeAction", params, 3000)
+                      local result = vim.lsp.buf_request_sync(0, "textDocument/codeAction", params)
+                      for cid, res in pairs(result or {}) do
+                        for _, r in pairs(res.result or {}) do
+                          if r.edit then
+                            local enc = (vim.lsp.get_client_by_id(cid) or {}).offset_encoding or "utf-16"
+                            vim.lsp.util.apply_workspace_edit(r.edit, enc)
+                          end
+                        end
+                      end
+                      vim.lsp.buf.format({async = false})
+                    end
+                  })
+                '';
+              };
               cmake.enable = true;
               gdscript.enable = true;
               eslint.enable = true;
@@ -194,6 +220,11 @@ in
             lspServersToEnable = "all";
           };
 
+          efmls-configs = {
+            enable = true;
+            setup.go.formatter = [ "goimports" ];
+          };
+
           barbar = {
             enable = true;
             autoHide = true;