Re: [PATCH 1/2] rebase -i: support --root without --onto

Chris Webb [off-list ref] writes:

quoted

In short, my questions are:

 (1) what is the purpose of the first "commit --amend" to update the
     sentinel root commit?

This first commit --amend isn't supposed to change the empty tree in the
commit: the tree and index should be unchanged at this point. I'm only
running it to set the commit message and author.

The idea here is that I want the author and commit message already in place
if cherry-pick (and hence pick_one -n) fails so that we drop out for the
user to resolve conflicts.

Very understandable.  Perhaps in-code comments would have helped.

quoted

 (2) Is the purpose of "pick_one -n" done here to create a root
     commit?  Does it always do so correctly?

pick_one -n cherry-picks the changes without actually making a commit. It's
already used in the squash case, so should be well-tested.

OK.