WANTED: patch splitting tool - waypoints

Hi,

My toolkit is missing a tool. I've never seen it or anything like it, but I can describe it - and hopefully someone else knows if it exists.

It's basically a combination of git rebase -i and git add -p. Something that allows you to split either a single patch or a series of patches that had bad "waypoints".

You can imagine the patch as a journey from A to B. Only, that's a long journey, and the path between them is a big ugly code dump. The commits along the way include various adventures down rabbit holes that got backed out much later without necessarily tidying up the history along the way.

This tool allows you to easily generate one intermediate state. Repeated application generates multiple intermediate states until you have a nice tidy patch series, every step of the way bisectable.

So the journey A => B becomes the journey A => W => B.

The tool allows you to quickly choose which hunks to add to patch(A=>W) and which to add to patch(W=>B), but also lets you make edits to the intermediate state easily so that W will compile even if some bits of the patch were intermingled.

Does anybody know of a tool that can do this? Does it sounds like something others would use? I'm thinking that you could sort of get there with a combination of rebase squash, git add -p and a git stash holding the state of 'B', but it would need to be scripted enough that repeated application isn't a pain. And a graphical/ ncurses interface like the kernel's "make menuconfig" at the very least would make it much easier than paging through piles of diff fragments and hoping you never made a mistake.

Regards,

Bron.