From eef71477ce8484a1faeacb28de1a71ee4365eda7 Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Tue, 1 Jun 2021 18:07:30 +0800
Subject: Add a key-binding to clear buffers in ibuffer.

* ibuffer.el (durand-ibuffer-clear): This is my frequent operation.

(ibuffer-mode-map): Bind to a key.
---
 ibuffer.el | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/ibuffer.el b/ibuffer.el
index 8d77296..a6910d0 100644
--- a/ibuffer.el
+++ b/ibuffer.el
@@ -73,6 +73,41 @@ If the optional ARG is non-nil, then produce an IBUFFER buffer
      (list (cons 'used-mode
                  (buffer-local-value 'major-mode (current-buffer))))))))
 
+;;;###autoload
+(defun durand-ibuffer-clear (&optional arg)
+  "Kill every buffer except for the dashboard.
+If the optional ARG is non-nil, then kill every buffer except for
+those that are marked."
+  (interactive "P")
+  (cond
+   ((derived-mode-p 'ibuffer-mode))
+   ((user-error "durand-ibuffer-clear should only be used in \
+derived modes of ibuffer-mode.")))
+  (cond
+   ((null arg)
+    (mapc (function
+           (lambda (buffer)
+             (cond
+              ((string= (buffer-name buffer)
+                        dashboard-buffer-name))
+              ((kill-buffer buffer)))))
+          (cons
+           (current-buffer)
+           (mapcar #'car (ibuffer-current-state-list)))))
+   (t
+    (mapc (function
+           (lambda (buffer-and-mark)
+             (cond
+              ((or (/= (cdr buffer-and-mark)
+                       ibuffer-marked-char)
+                   (string= (buffer-name (car buffer-and-mark))
+                            dashboard-buffer-name)))
+              ((kill-buffer (car buffer-and-mark))))))
+          (cons
+           (cons (current-buffer) 32)
+           (ibuffer-current-state-list)))
+    (ibuffer-update nil))))
+
 (define-key global-map (vector 24 2) #'ibuffer)
 (define-key global-map (vector ?\s-h) #'ibuffer)
 (define-key global-map (vector ?\M-\s-b) #'switch-to-buffer-same-mode)
@@ -83,6 +118,7 @@ If the optional ARG is non-nil, then produce an IBUFFER buffer
 
 (define-key ibuffer-mode-map (vector ?d) #'ibuffer-do-delete)
 (define-key ibuffer-mode-map (vector ?D) #'ibuffer-mark-for-delete)
+(define-key ibuffer-mode-map (vector ?c) #'durand-ibuffer-clear)
 
 ;;; filter for bongo
 
-- 
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