[PATCH] Add git-rev-list --invert-match

[Bart Trojanowski <bart@jukie.net>]

Example usage:

  git log --invert-match --grep="uninteresting"

  This command will prune out all commits that match the grep pattern.

How it works:

  The --invert-match flag sets invert_match, in rev_info.  This boolean
  is later checked in commit_match() and if set it inverts the result of
  grep_buffer().
---
 revision.c |   11 ++++++++++-
 revision.h |    3 ++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/revision.c b/revision.c
index 33d092c..57b2d0f 100644
--- a/revision.c
+++ b/revision.c
@@ -1182,6 +1182,10 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
 				regflags |= REG_ICASE;
 				continue;
 			}
+			if (!strcmp(arg, "--invert-match")) {
+				revs->invert_match = 1;
+				continue;
+			}
 			if (!strcmp(arg, "--all-match")) {
 				all_match = 1;
 				continue;
@@ -1383,11 +1387,16 @@ static int rewrite_parents(struct rev_info *revs, struct commit *commit)
 
 static int commit_match(struct commit *commit, struct rev_info *opt)
 {
+	int result;
+
 	if (!opt->grep_filter)
 		return 1;
-	return grep_buffer(opt->grep_filter,
+
+	result = grep_buffer(opt->grep_filter,
 			   NULL, /* we say nothing, not even filename */
 			   commit->buffer, strlen(commit->buffer));
+
+	return opt->invert_match ? !result : result;
 }
 
 static struct commit *get_revision_1(struct rev_info *revs)
diff --git a/revision.h b/revision.h
index 98a0a8f..ead04a7 100644
--- a/revision.h
+++ b/revision.h
@@ -48,7 +48,8 @@ struct rev_info {
 			parents:1,
 			reverse:1,
 			cherry_pick:1,
-			first_parent_only:1;
+			first_parent_only:1,
+			invert_match:1;
 
 	/* Diff flags */
 	unsigned int	diff:1,
-- 
1.5.3.1.154.g734e65