git-log: added --none-match optioncj/grep-none-match

Implements a inverted match for "git log", like in the case of
"git grep -v", which is useful from time to time to e.g. filter
FIXUP message out of "git log".

Internally, a new bol 'none_match' has been introduces as
revs->grep_filter.invert inverts the match line-wise, which cannot
work as i.e. empty line always not match the pattern given.

Signed-off-by: Christoph Junghans <ottxor@gentoo.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/grep.c b/grep.c
index 6e085f8297..f486ee5631 100644
--- a/grep.c
+++ b/grep.c
@@ -1622,6 +1622,8 @@ static int chk_hit_marker(struct grep_expr *x)
 
 int grep_source(struct grep_opt *opt, struct grep_source *gs)
 {
+	if(opt->none_match)
+		return !grep_source_1(opt, gs, 0);
 	/*
 	 * we do not have to do the two-pass grep when we do not check
 	 * buffer-wide "all-match".