Undo-tree BUG: "*.~undo-tree~" files scattering everywhere!

Has anyone encountered the bug where you suddenly see a bunch of \*.\~undo-tree\~ hidden files scattering everywhere? (Whenever I undo an edit in a file, a new file gets created with the same file name except with .\~undo-tree\~ file extension appended to it.) I'm not exactly sure what happened since this morning -- it was working fine then. I reinstalled Emacs and nuked the elpa packages and reinstalled them all, but the problem is still here. I've never seen this behavior before. Any help would be appreciated!

Undo Fu is an alternative.

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Might be, but here it is easier to customize undo-tree-auto-save-history to nil. The default for that variable has changed in the latest release on Sunday.

I'm sorry you got downvoted. I didn't know undo-fu existed -- thanks for letting me know!

I've tried so hard to find the changelog, thanks for pointing out the variable change -- it must be the reason. Where did you find the undo-tree changelog?

I just looked at the latest diffs in git. Luckily it was the first change in the file. https://git.savannah.gnu.org/gitweb/?p=emacs/elpa.git;a=blobdiff;f=undo-tree.el;h=1b8eb2f8d44005a3a9d88d5b3fdbf352d48a1d14;hp=e3785877b1a9e3038309c20cef4bb0385e3ec03c;hb=71718650961b8546a3cba311c6cc8e069c85e882;hpb=bf2e9ba0c97e38e2037ff1bd01b81c15471110fd

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If you want auto-saved undo history [undo-fu-session](https://gitlab.com/ideasman42/emacs-undo-fu-session) - no dependencies on undo-fu, they can be used together though. Undo history is stored in a directory and wont scatter files around your repository.

Do `(setq undo-tree-auto-save-history nil)`

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I saw the same behavior change, just set the auto-save-history variable to nil to regain the old behavior. It looks like a feature update instead of a bug, allows undo-tree to preserve history after emacs closes

I recently encountered this behavior using Spacemacs (Emacs 28.0.60). A bit annoying considering that it kept clobbering up my git working tree. Here's what worked for me. I added the following to `~/.spacemacs` within `dotspacemacs/user-config`. ;; Prevent undo tree files from polluting your git repo (setq undo-tree-history-directory-alist '(("." . "~/.emacs.d/undo"))) That will persist the undo history in `~/.emacs.d/undo` instead of locally. In case it helps anyone, here's how to quickly find and delete all undo files: # Search the `app` directory recursively for any files containing '~undo' # Then interactively preview each command, and confirm with y/n $ find app -print | grep '~undo' | xargs -p -I {} rm {} rm app/.!app!models!customer.rb.~undo-tree~?... y ... ...

Thank you. That line saving files to \~/.emacs.d/undo is perfect. Much obliged. 👍

Awesome! [It works](https://github.com/AnthonyD973/ademacs/commit/33773d5f6243c11629590ff3019063ccbf326f93)! BTW I think a better delete command (which, however, would not prompt for deletion) is: ``` cd <the dir to delete undo-tree files recursively in> find -type f -name '*.~undo-tree~' -delete ```