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?
reddit / emacs

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raedr7n · 2022-02-17 23:43

I tried googling it, but I don't know the right terms for anything, so
I couldn't figure it out. Thanks for your help.

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nv-elisp · 2022-02-18 00:05

Interesting. What did you search (you should always include this in
your post)?
Searching for "Emacs customization" turns up several beginner friendly
tutorials such as:

https://medium.com/@thomy/basic-initial-emacs-
customization-d33ed7361835

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wemmik · 2022-02-18 01:13

`M-x describe-variable` for `evil-undo-system` should have some
explanation. If you’re running emacs v28 or newer you can add this
line and be done: `(evil-set-undo-system 'undo-redo)`

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Illiamen · 2022-02-18 01:17

Emacs before version 28 did not have an explicit "redo" command.
Instead, one would just undo a change made by the `undo` command.

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.

For example, on Emacs 27, you could install Undo Fu and then customize
that variable to tell Evil to use Undo Fu's `redo` command.

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raedr7n · 2022-02-18 03:37

Thank you! I'm running emacs 29, and this worked perfectly.