Undotree in fzf-lua

[ibhagwan]

Admittedly, I didn't see much value in the undotree I sort-of assumed if I used u a few times and made some changes the earlier changes are lost, after undotree plugin was merged upstrream I realized I was wrong and it was really nice to have and be able to access the undo history,. However, I didn't like the ansi graph visualization as I find it confusing and non-intuitive, more so navigating the tree changes the current buffer and causes some LSP's to lose their bearing.

Introducing :FzfLua undotree, which comes with a builtin previewer for the diff as well as a default <F8> toggle to see the original file state:

:FzfLua undotree

After pressing <F8> we can see the state of the file instead of the diff:

Alternatively, we can use the native previewer to see the diff paged into git-delta (if installed will be detected automatically):

:FzfLua undotree previewer=undotree_native

Note

By default the cursor will be pointed at the current position in the undotree, set locate=false option to disable:

:FzfLua undotree locate=false

Set the options in setup under undotree for permanency:

require("fzf-lua").setup({ undotree = { previewer = "undotree_native", locate=false } })

[GasparVardanyan]

Hi! Thanks for this great feature.
I have a question, which might sound dumb because I'm just trying to move to fzf-lua from telescope.
In FzfLua undotree search works directly on the undo tree graph, not on the diff hunks.
Can I make it to search in diff hunks instead? Like telescope-undo does.

[ibhagwan]

In FzfLua undotree search works directly on the undo tree graph, not on the diff hunks.

Correct, it works directly on the undo list (:undolist), it can't search diff hunks, use :FzfLua git_hunks ref=HEAD~ (or any other ref) for that.

[GasparVardanyan]

Thanks! But I didn't mean the git's diff hunks. I mean the diff hunks from the undo tree.
For example if I had a function named foo, which isn't commited in git, and deleted it in some stage of editing the file, I want to search for foo and find the undo tree node which represents the deletion of foo (also the node which represents the insertion of foo will show up here). This is the feature I'm missing in fzf-lua's undotree.
Also telescope-undo have the ability to yank the deletions/additions with mappings instead of just navigating to the selected node, which is very useful when fuzzy-finding the undo tree. I would like to have this ability in fzf-lua's undotree too.
Showing whether the node was written or not would be helpful too. Like undotree marking that nodes with s (shown in the image)

[ibhagwan]

I want to search for foo and find the undo tree node which represents the deletion of foo (also the node which represents the insertion of foo will show up here).

Not implemented ATM currently we generate the diff on demand only for the current entry’s preview, I suspect this might be heavy on a large undo tree, unfortunately I don’t have time to invest in this change ATM but you’re welcome to PR it if you wanna give it a go and it works well enough.

Showing whether the node was written or not would be helpful too

This info is already readily available as part of the tree enumeration shouldn’t be hard to add, feel free to add that too in your PR or open a feature request for the “saved” marker and I’ll add it when I get a chance.

[GasparVardanyan]

Ok, thanks a lot!!
I don't think I'll success this as I'm not that good at lua and nvim api, but would try it and do a PR if succeded.