git log: Unify header_filter and message_filter into one.

Now we can tell the built-in grep to grep only in head or in
body, use that to update --author, --committer, and --grep.

Unfortunately, to make --and, --not and other grep boolean
expressions useful, as in:

	# Things written by Junio committed and by Linus and log
	# does not talk about diff.

	git log --author=Junio --and --committer=Linus \
		--grep-not --grep=diff

we will need to do another round of built-in grep core
enhancement, because grep boolean expressions are designed to
work on one line at a time.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 1 insertions, 3 deletions

diff --git a/builtin-rev-list.c b/builtin-rev-list.c
index dbfee750aa..fb7fc92145 100644
--- a/builtin-rev-list.c
+++ b/builtin-rev-list.c
@@ -269,9 +269,7 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
 	    revs.diff)
 		usage(rev_list_usage);
 
-	save_commit_buffer = revs.verbose_header ||
-		revs.header_filter ||
-		revs.message_filter;
+	save_commit_buffer = revs.verbose_header || revs.grep_filter;
 	track_object_refs = 0;
 	if (bisect_list)
 		revs.limited = 1;