Re: Editing the root commit

Jeff King [off-list ref] writes:

I think the only thing you can do is make a fake sentinel commit (with
an empty tree) to put in HEAD, and then remove the sentinel immediately
after the first commit is put in place (making sure not to include it in
the first commit's parent list). Yuck.

I thought this would turn out far more horrible than it actually did in
practice.

The follow-up patch adds this empty sentinel and then automatically squashes
it into the root commit(s) as they're picked. The resulting rebase -i --root
can handle re-ordering of commits (picking a new root), editing of the root
commit, dropping the root commit, and so on.

In the second patch, I've written some simple tests to demonstrate this and
to cover cases that seem particularly likely to break, as well as removing a
test_must_fail for --root without --onto, because it no longer does!

Cheers,

Chris.