README.org

:emacs undo

Description

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

Maintainers

• @hlissner

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Module flags

+tree

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

Packages

• doom-package:undo-fu
• doom-package:undo-fu-session
• doom-package:undo-tree if doom-module:+tree
• doom-package:vundo

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.
• undo-fu only
  • Doom defines undo-fu-mode to make it easier to add hooks/mode-local keybinds.

Changelog

This module does not have a changelog yet.

Installation

Enable this module in your doom! block.

This module has no external requirements.

Usage

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Configuration

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Disabling persistent undo history

• If you are using doom-module:+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

Report an issue?

undo-tree

• Has been known to truncate undo history unpredictably, due to Emacs’ undo cleanup imposing linear undo limits on non-linear undo tree data. Doom already sets undo-limit, undo-strong-limit, and undo-outer-limit absurdly high to mitigate this somewhat.

Frequently asked questions

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Appendix

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