Junio C Hamano <gits...@pobox.com> writes:

> Jeff King <p...@peff.net> writes:
>> On Fri, May 09, 2014 at 07:04:05AM +0200, David Kastrup wrote:
>>> Arguably if the user explicitly limited the range, he knows what he's
>>> looking at. Admittedly, I don't know offhand which options _will_
>>> produce boundary commit indications: there may be some without explicit
>>> range limitation, and we might also be talking about limiting through
>>> shallow repos (git blame on a shallow repo is probably a bad idea in the
>>> first place, but anyway).
>> Yes, I was thinking mostly of "X..Y" types of ranges, which are probably
>> the most common. I hadn't considered shallow repositories, and you can
>> also hit the root commit as a boundary if you do not specify --root.
>> I guess the question still in my mind is: what use does the identity of
>> the boundary commit have? That is, whether you know ahead of time where
>> the boundary is or not, is there ever a case where knowing its author
>> and/or commit sha1 is a useful piece of information, as opposed to
>> knowing that we hit a boundary at all?
>> I could not think of one, but I may simply lack imagination.
> Well, the original message was triggered by the same "I could not
> think of one" from me ;-).

If it's the root commit, omitting all info may surprisingly make "who
should I yell at" hard.  I also am not sure about the implications in
connection with --reverse.

In connection with explicit -b however, I think it is nonsensical to
blank out only the commit id.

David Kastrup
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