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 0c402be42a882d8392cb29e4a2eede1f36dc5ff5..23b2c97ba0dffdbadf420e6d04170590fb32d810 100644 (file)
--- a/el/dot-emacs.el
+++ b/el/dot-emacs.el
@@ -588,6 +588,15 @@ (defadvice display-buffer (before mdw-inhibit-other-frames activate)
 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.