add ibuffer filter for unsaved file buffers

settings/general-settings.el

@@ -60,6 +60,16 @@
         (set-buffer-modified-p nil)
         t))))
 
+(use-package ibuf-ext
+  :defer t
+  :config
+  (define-ibuffer-filter unsaved
+      "Toggle current view to buffers whose file is unsaved."
+    (:description "file is unsaved")
+    (with-current-buffer buf
+      (and buffer-file-name (buffer-modified-p))))
+  (define-key ibuffer-mode-map (kbd "/ u") 'ibuffer-filter-by-unsaved))
+
 ;; recentf stuff
 (use-package recentf
   :config