From: Mark Wooding <mdw@distorted.org.uk>
Date: Wed, 6 May 2020 17:51:58 +0000 (+0100)
Subject: el/dot-emacs.el: Advise `rename-file' to rename buffers at the same time.
X-Git-Url: https://git.distorted.org.uk/~mdw/profile/commitdiff_plain/3782446f0bbdc76405aadc6c73f78ce37153fd55

el/dot-emacs.el: Advise `rename-file' to rename buffers at the same time.

I remember investigating this hack a while ago and finding that it
looked very difficult.  This time, it's nearly trivial.  What gives?
---

diff --git a/el/dot-emacs.el b/el/dot-emacs.el
index 0c402be..23b2c97 100644
--- a/el/dot-emacs.el
+++ b/el/dot-emacs.el
@@ -588,6 +588,15 @@ Even if an existing window in some random frame looks tempting."
 Pretend they don't exist.  They might be on other display devices."
   (ad-set-arg 2 nil))
 
+;; Rename buffers along with files.
+
+(defadvice rename-file (after mdw-rename-buffers (from to &optional forcep)
+			compile activate)
+  (let ((buffer (get-file-buffer from)))
+    (when buffer
+      (with-current-buffer buffer
+	(set-visited-file-name to nil t)))))
+
 ;;;--------------------------------------------------------------------------
 ;;; Improved compilation machinery.