grep: Allow case insensitive search of fixed-strings

"git grep" currently an error when you combine the -F and -i flags.
This isn't in line with how GNU grep handles it.

This patch allows the simultaneous use of those flags.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Brian Collins <bricollins@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/t/t7002-grep.sh b/t/t7002-grep.sh
index ae56a36eac..35a1e7a5d4 100755
--- a/t/t7002-grep.sh
+++ b/t/t7002-grep.sh
@@ -14,6 +14,7 @@ int main(int argc, const char **argv)
 {
 	printf("Hello world.\n");
 	return 0;
+	/* char ?? */
 }
 EOF
 
@@ -345,4 +346,13 @@ test_expect_success 'grep from a subdirectory to search wider area (2)' '
 	)
 '
 
+cat >expected <<EOF
+hello.c:int main(int argc, const char **argv)
+EOF
+
+test_expect_success 'grep -Fi' '
+	git grep -Fi "CHAR *" >actual &&
+	test_cmp expected actual
+'
+
 test_done