[PATCH v2] range-diff: allow to diff files regardless submodule

[Lucas De Marchi]

Do like it's done in grep so mode doesn't end up as
0160000, which means range-diff doesn't work if one has
"submodule.diff = log" in the configuration. Without this
while using range-diff I only get a

    Submodule a 0000000...0000000 (new submodule)

instead of the diff between the revisions.

Signed-off-by: Lucas De Marchi <lucas.demar...@intel.com>
---
 range-diff.c          |  2 +-
 t/t3206-range-diff.sh | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/range-diff.c b/range-diff.c
index 60edb2f518..bd8083f2d1 100644
--- a/range-diff.c
+++ b/range-diff.c
@@ -354,7 +354,7 @@ static struct diff_filespec *get_filespec(const char *name, 
const char *p)
 {
        struct diff_filespec *spec = alloc_filespec(name);
 
-       fill_filespec(spec, &null_oid, 0, 0644);
+       fill_filespec(spec, &null_oid, 0, 0100644);
        spec->data = (char *)p;
        spec->size = strlen(p);
        spec->should_munmap = 0;
diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index 045aca1c18..6aae364171 100755
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -122,6 +122,35 @@ test_expect_success 'changed commit' '
        test_cmp expected actual
 '
 
+test_expect_success 'changed commit with sm config' '
+       git range-diff --no-color --submodule=log topic...changed >actual &&
+       cat >expected <<-EOF &&
+       1:  4de457d = 1:  a4b3333 s/5/A/
+       2:  fccce22 = 2:  f51d370 s/4/A/
+       3:  147e64e ! 3:  0559556 s/11/B/
+           @@ -10,7 +10,7 @@
+             9
+             10
+            -11
+           -+B
+           ++BB
+             12
+             13
+             14
+       4:  a63e992 ! 4:  d966c5c s/12/B/
+           @@ -8,7 +8,7 @@
+            @@
+             9
+             10
+           - B
+           + BB
+            -12
+            +B
+             13
+       EOF
+       test_cmp expected actual
+'
+
 test_expect_success 'no commits on one side' '
        git commit --amend -m "new message" &&
        git range-diff master HEAD@{1} HEAD
-- 
2.19.1.1.g8c3cf03f71