Merge branch 'jc/diff-I-status-fix'

"git diff -I<pattern> -exit-code" should exit with 0 status when
all the changes match the ignored pattern, but it didn't.

* jc/diff-I-status-fix:
  diff: correct interaction between --exit-code and -I<pattern>

1 files changed, 24 insertions, 0 deletions

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index 47f0e2889d..8c574221b2 100755
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -567,6 +567,30 @@ test_expect_success '--check and --quiet are not exclusive' '
 	git diff --check --quiet
 '
 
+test_expect_success '-w and --exit-code interact sensibly' '
+	test_when_finished "git checkout x" &&
+	{
+		test_seq 15 &&
+		echo " 16"
+	} >x &&
+	test_must_fail git diff --exit-code &&
+	git diff -w >actual &&
+	test_must_be_empty actual &&
+	git diff -w --exit-code
+'
+
+test_expect_success '-I and --exit-code interact sensibly' '
+	test_when_finished "git checkout x" &&
+	{
+		test_seq 15 &&
+		echo " 16"
+	} >x &&
+	test_must_fail git diff --exit-code &&
+	git diff -I. >actual &&
+	test_must_be_empty actual &&
+	git diff -I. --exit-code
+'
+
 test_expect_success 'check staged with no whitespace errors' '
 	echo "foo();" >x &&
 	git add x &&