Re: [PATCH] fix "git log -i --grep"

Jeff King [off-list ref] writes:

On Fri, Aug 22, 2008 at 02:09:35PM -0700, Junio C Hamano wrote:

quoted

    [alias]
        who = "!sh -c 'git log -1 --pretty=\"format:%an <%ae>\" --author=\"$1\"' -"

I have two improvements for this, and one of them caused me to find a
git bug, for which the fix is below. :)

  1. I tried this with --no-pager, which made it obvious that this
     should be using --pretty=tformat to append a newline.

Strict reading of POSIX suggests that you are not supposed to send an
input that has incomplete line to "sed", so tformat may be the right thing
to use for that reason as well.

However.

My sed is non POSIX in a good sense and does not have problem handing such
an input, and my use case is to say "\C-u \M-! git who Jeff <ENTER>" while
typing e-mail message, and I do _not_ want an extra newline after the
input.  That is why I use format: (not tformat:) there.

The fix is to allocate the grep_filter member whenever we
get _any_ grep information, be it actual filters or just
flags. Thus checking for non-NULL revs->grep_filter is no
longer sufficient to know that we have patterns; in
commit_match we must actually check that the pattern list is
not empty.

Well spotted, and thanks for the fix.

As you suggested, making the grep option structure embedded in rev_info
may not be a bad idea.  We used to keep track of the sub-options
separately while we encounter, and updated grep_filter at the end of the
loop, but the conversion to use parse-options broke it.

The only issue I still have, which I suspect your fix has made it easier
to address, is to complain if sub-options to grep like -i and -E are given
without --grep.  That's not something v1.5.6 series did, though.