Feature request: Swap/invert staged and unstaged files

[KJ7LNW]

Is your feature request related to a problem? Please describe.

I often find myself in situations where I've staged a bunch of files, then realize I actually want to commit the opposite set of changes first. Currently, the a key stages or unstages everything uniformly, but there's no way to invert/swap what's staged vs unstaged. Having to manually toggle each file with space gets tedious when dealing with many files.

Describe the solution you'd like

A keybinding that swaps the staging status of all files - everything currently staged becomes unstaged, and everything currently unstaged becomes staged. This would work in the Files panel on all files at once.

Describe alternatives you've considered

• Manually toggling each file with space - works but tedious for many files
• Using stash operations to indirectly achieve this - clunky workflow
• A custom command using git plumbing commands (git write-tree, git apply, etc.) - possible but complex

Additional context

This is admittedly not a simple git operation (see [this Stack Overflow thread](https://stackoverflow.com/questions/3573410/what-is-the-shortest-way-to-swap-staged-and-unstaged-changes-in-git) for the gnarly git commands involved), but lazygit excels at making complicated git workflows simple, so it seems like a good candidate for a built-in feature.

I searched the existing issues and discussions and couldn't find any prior requests for this functionality (though there are related issues around stashing staged/unstaged changes separately #1863, #458. If lazygit already supports stashing staged or unstaged changes separately, this swap feature would make it easy to stash "the other half" of your changes - just invert staging and use the existing stash command.)

[mark2185]

Another idea: just commit what you have staged, then commit the second set of changes and then just move the HEAD commit 1 down with ctrl+j in the Commits panel?

[KJ7LNW]

Good idea, but typically I need to continue working on the things that are staged yet. I need to swap what is staged, continue working on what was previously staged, commit what was unstaged...and then after continuing working on the things that were originally staged and now not yet committed, I then commit those.

This arises from some amount of artificial intelligence programming, where I do not realize that something needs to happen before the original thing I was working on needs to happen. So, I get something mostly set up, get ready to commit it, have everything staged for review, run into a problem, and then make all of the changes that need to happen before that thing that is staged. At this point in the process, what I need to commit is exactly backwards, and it is particularly complicated if files were modified and partially staged. For example, a rename was modified or something like that.

Sometimes, I can just manually go through and hit space, but often I have something staged that is then modified MM---and this split is really the piece that I cannot handle by doing space to swap the selections, so a swap button would be extremely convenient.