Distributing revisions to patches in a series

[Daniel Barkalow <barkalow@iabervon.org>]

I was wondering if anybody's got a good process for the following 
situation: I've just rebased a series onto the new origin/next. In the 
afterwards, I determined that some of the intermediate merges weren't 
right (the patch to split bundle-handling out of builtin-bundle didn't 
pick up fixes to builtin-bundle). I also found and fixed a warning added 
by my series. I want to take these changes, split them into individual 
hunks, and apply each hunk to the appropriate commit from the series 
before that commit, generating a new series.

I know how to do it by figuring out where the hunk should go myself and 
branching, fixing, and rebasing, but I was wondering if there was a magic 
script to just do it. It seems like it should be an automatable operation 
(take the last commit as a set of hunks, and walk back up the history, 
leaving each one at the oldest commit to which it applies cleanly; when 
all of the hunks are allocated, generate a new history by amending 
commits).

	-Daniel
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