add dired-sidebar package

emacs.d/dired.el

@@ -38,3 +38,17 @@
   (setq trashed-use-header-line t)
   (setq trashed-sort-key '("Date deleted" . t))
   (setq trashed-date-format "%Y-%m-%d %H:%M:%S"))
+
+(use-package dired-sidebar
+  :ensure t
+  :bind
+  (("C-x C-n" . dired-sidebar-toggle-sidebar))
+  :commands (dired-sidebar-toggle-sidebar)
+  :init
+  (add-hook 'dired-sidebar-mode-hook
+            (lambda ()
+              (unless (file-remote-p default-directory)
+                (auto-revert-mode))))
+  :config
+  (push 'toggle-window-split dired-sidebar-toggle-hidden-commands)
+  (push 'rotate-windows dired-sidebar-toggle-hidden-commands))