Re: git log fails to show all changes for a file

[Junio C Hamano <gitster@pobox.com>]

Linus Torvalds <torvalds@linux-foundation.org> writes:

> That said, I do wonder if we should just make "-p" imply "--cc". Right
> now we have the kind of odd situation that "git log -p" doesn't show
> merge patches, but "git show <cmit>" does show them. And you kind of
> have to know a lot about git to know the "--cc" option.
>
> In fact, that "git show" behavior really is very subtle, but very
> useful. It comes from show_rev_tweak_rev(), which is a magic git-show
> thing.

I would think "git log -p" that implies "--cc" would be a good
change, as long as there is an easy escape hatch to let us do what
we have to do with a rather lengthy "git log -p --first-parent -m"
(i.e. show the change relative to its first parent while traversing
the first parent chain) today.  Perhaps only when there is no
explicit "-m" but "-p" is given, automatically enable "--cc", or
something like that.