undo-tree
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undo-tree
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Emacs noob here. How do I get redo functionality in evil mode? When I hit C-r, I see "customize 'evil-undo-system' for redo functionality", but I have no Idea what that means or how to do it. I assume there's some line I should add in my .emacs file?
There are packages that were written to add an explicit redo command, such as Undo Fu (https://gitlab.com/ideasman42/emacs-undo-fu) and Undo Tree (https://www.dr-qubit.org/undo-tree.html). Again, these packages are not needed in Emacs 28. That variable you found tells Evil which feature/package you want to use for an explicit redo command.
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undo-tree git repository is not available anymore?
The only other place I could find the most recent git repo is on emacsmirror.
undo-tree
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Text Editor Data Structures: Rethinking Undo
vundo is a simpler implementation: it reuses Emacs's tree and just implements the visualisation part.
undo-tree is a reimplementation of Emacs's tree based undo, that supports a visualization.
* undo-tree LOC: 4700. https://gitlab.com/tsc25/undo-tree/-/blob/master/undo-tree.e...
* vundo LOC: 1350. https://github.com/casouri/vundo/blob/master/vundo.el
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How to undo the undo
That said, the situations seems murky still: the version in ELPA is newer (0.7.5), but it's still outdated, the home page advertises 0.8.2 as the latest version. And it moved to a different repository location. And looking at its history, it seems to never have included the version 0.7.5: https://gitlab.com/tsc25/undo-tree/-/commit/5da2a7aee98393d26a93c499dc79fcf793f161e1
- Undo-Tree.el
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Why is it so hard to see code from 5 minutes ago?
It’s easier to mentally map that the default behaviour undo/redo for Emacs (which is not unreasonable, just complex).
The source for undo-tree contains documentation which very effectively describes the way the library works with examples and comparisons with how Emacs does things by default: https://gitlab.com/tsc25/undo-tree/-/blob/master/undo-tree.e...
- undo-tree repository's new home (Gitlab)
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undo-tree git repository is not available anymore?
Looks like the repo is moved to https://gitlab.com/tsc25/undo-tree
What are some alternatives?
emacs-undo-fu
undo-tree.el - Visualize Emacs undo information as a graphical tree and navigate to previous states
undotree - The undo history visualizer for VIM
vim-mundo - :christmas_tree: Vim undo tree visualizer
emacs-undo-fu-session
WBO - Online collaborative Whiteboard that is simple, free, easy to use and to deploy
xray - An experimental next-generation Electron-based text editor
gundo.vim - A git mirror of gundo.vim
klonk - A text editor with an sort-of-unusual undo/redo algorithm
local-history - local-history for vscode
evil - The extensible vi layer for Emacs.