Re: [PATCH 6/6] pack-objects: reuse on-disk deltas for thin "have" objects

On Tue, Aug 21, 2018 at 12:50:09PM -0700, Junio C Hamano wrote:

quoted

Sorry for commenting on something completely off-topic, but when
applied with "git am -s", I get a resulting commit with 3 S-o-b (the
above two, plus the one added by "-s"), with a blank line in between
them.  I can understand the first blank line (the one between your
two S-o-b), as the first S-o-b does not even appear to be part of
the trailer block, but cannot explain why I get an extra one before
the one added by "-s".  Puzzled...

I think your original "two s-o-b with a blank line in between" was
caused by the same problem, and "git commit --amend -s" perhaps
added an extra one at the end, and added a blank line before the
last "paragraph" while at it?

My suspicion is the long horizontal line at the beginning of the
table, triggers it.  I haven't followed the code closely yet,
though.

Ah, yeah, I think you're right. We call find_patch_start(), which thinks
the "---" line is the end of the commit message. That makes sense when
parsing trailers out of "format-patch" output, but not when we know we
have just the commit message.

So one obvious fix is a new option for the trailer code to tell it we
have _just_ a commit message. That would still leave this obvious false
positive for the format-patch case, but I'm not sure it can be helped.

-Peff