diffcore-delta.c: Ignore CR in CRLF for text files

This ignores CR byte in CRLF sequence in text file when
computing similarity of two blobs.

Usually this should not matter as nobody sane would be checking
in a file with CRLF line endings to the repository (they would
use autocrlf so that the repository copy would have LF line
endings).

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/t/t0022-crlf-rename.sh b/t/t0022-crlf-rename.sh
new file mode 100755
index 0000000000..430a1d1d38
--- /dev/null
+++ b/t/t0022-crlf-rename.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+test_description='ignore CR in CRLF sequence while computing similiarity'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	cat ../t0022-crlf-rename.sh >sample &&
+	git add sample &&
+
+	test_tick &&
+	git commit -m Initial &&
+
+	sed -e "s/\$/
/" ../t0022-crlf-rename.sh >elpmas &&
+	git add elpmas &&
+	rm -f sample &&
+
+	test_tick &&
+	git commit -a -m Second
+
+'
+
+test_expect_success 'diff -M' '
+
+	git diff-tree -M -r --name-status HEAD^ HEAD |
+	sed -e "s/R[0-9]*/RNUM/" >actual &&
+	echo "RNUM	sample	elpmas" >expect &&
+	diff -u expect actual
+
+'
+
+test_done