README.org

emacs/undo

Table of Contents

• Description
  • Maintainers
  • Module Flags
  • Plugins
  • Hacks
• Prerequisites
• Features
• Configuration
  • Disabling persistent undo history
• Troubleshooting

Description

This module augments Emacs’ built-in undo system to be more intuitive and to persist across Emacs sessions.

Maintainers

This module has no dedicated maintainers.

Module Flags

• +tree Uses undo-tree instead of undo-fu, which is a little less stable, but offers branching undo history and a visualizer for navigating it.

Plugins

• undo-fu
• undo-fu-session
• undo-tree (+tree)

Hacks

• Both undo-fu and undo-tree have been modified to use zstd to compress undo history if it is available.
• undo-tree only
  • Text properties are stripped from undo history to shrink it.
  • Undo-tree is too chatty about saving its history files. This has be “silenced”. i.e. It’s visible in \*Messages\*, but won’t appear in your minibuffer.
• unfo-fu only
  • Doom defines undo-fu-mode to make it easier to add hooks/mode-local keybinds.

Prerequisites

This module has no prerequisites.

Features

Configuration

Disabling persistent undo history

• If you are using +tree:

  (after! undo-tree
    (setq undo-tree-auto-save-history nil))
      

• If you aren’t:

  (remove-hook 'undo-fu-mode-hook #'global-undo-fu-session-mode)
      

Troubleshooting