Persistent undo history for GNU Emacs
This extension provides a way to use undo history of individual file buffers persistently.
Write the following code to your .emacs:
(require 'undohist)
(undohist-initialize)Now you can record and recover undohist by typing C-x C-s (save-buffer) an C-x C-f (find-file). And then type C-/ (undo).
Note that this package is no longer actively maintained.
-
undo-fu-session is an updated version of this package, with support for undo/redo and compression among other improvements.
-
undo-tree is an undo system for Emacs, which includes support for restoring an undo-session from saved files.