grep -p: support user defined regular expressions

Respect the userdiff attributes and config settings when looking for
lines with function definitions in git grep -p.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/t/t7002-grep.sh b/t/t7002-grep.sh
index ef59ab9941..b13aa7e89a 100755
--- a/t/t7002-grep.sh
+++ b/t/t7002-grep.sh
@@ -244,11 +244,24 @@ test_expect_success 'grep with CE_VALID file' '
 '
 
 cat >expected <<EOF
+hello.c=#include <stdio.h>
+hello.c:	return 0;
+EOF
+
+test_expect_success 'grep -p with userdiff' '
+	git config diff.custom.funcname "^#" &&
+	echo "hello.c diff=custom" >.gitattributes &&
+	git grep -p return >actual &&
+	test_cmp expected actual
+'
+
+cat >expected <<EOF
 hello.c=int main(int argc, const char **argv)
 hello.c:	return 0;
 EOF
 
 test_expect_success 'grep -p' '
+	rm -f .gitattributes &&
 	git grep -p return >actual &&
 	test_cmp expected actual
 '