revision: add --grep-reflog to filter commits by reflog messages

Similar to --author/--committer which filters commits by author and
committer header fields. --grep-reflog adds a fake "reflog" header to
commit and a grep filter to search on that line.

All rules to --author/--committer apply except no timestamp stripping.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
index 30eaa9a54b..3a5d0fd770 100755
--- a/t/t7810-grep.sh
+++ b/t/t7810-grep.sh
@@ -546,6 +546,32 @@ test_expect_success 'log grep (6)' '
 	test_cmp expect actual
 '
 
+test_expect_success 'log grep (7)' '
+	git log -g --grep-reflog="commit: third" --pretty=tformat:%s >actual &&
+	echo third >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'log grep (8)' '
+	git log -g --grep-reflog="commit: third" --grep-reflog="commit: second" --pretty=tformat:%s >actual &&
+	{
+		echo third && echo second
+	} >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'log grep (9)' '
+	git log -g --grep-reflog="commit: third" --author="Thor" --pretty=tformat:%s >actual &&
+	echo third >expect &&
+	test_cmp expect actual
+'
+
+test_expect_success 'log grep (9)' '
+	git log -g --grep-reflog="commit: third" --author="non-existant" --pretty=tformat:%s >actual &&
+	: >expect &&
+	test_cmp expect actual
+'
+
 test_expect_success 'log with multiple --grep uses union' '
 	git log --grep=i --grep=r --format=%s >actual &&
 	{