merge-recursive: refuse to merge binary files

[jc: cherry-picked 9f30855 from 'master']

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/merge-recursive.c b/merge-recursive.c
index 8f72b2c079a68ac5cb9d1c90bb7b72fa779efb5f..4a82b741ae020376ac67b34d5fce86e8a87a3b5d 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -680,6 +680,12 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
 {
        xpparam_t xpp;
 
+       if (buffer_is_binary(orig->ptr, orig->size) ||
+                       buffer_is_binary(src1->ptr, src1->size) ||
+                       buffer_is_binary(src2->ptr, src2->size))
+               return error("Cannot merge binary files: %s vs. %s\n",
+                       name1, name2);
+
        memset(&xpp, 0, sizeof(xpp));
        return xdl_merge(orig,
                         src1, name1,

diff --git a/t/t6024-recursive-merge.sh b/t/t6024-recursive-merge.sh
index a398556137205d9fb561746335a13330a5aeda54..058db9cc52521a9ba9e408c9455645d8adc4ba79 100755 (executable)
--- a/t/t6024-recursive-merge.sh
+++ b/t/t6024-recursive-merge.sh
@@ -81,4 +81,18 @@ EOF
 
 test_expect_success "virtual trees were processed" "git diff expect out"
 
+git reset --hard
+test_expect_success 'refuse to merge binary files' '
+       printf "\0" > binary-file &&
+       git add binary-file &&
+       git commit -m binary &&
+       git checkout G &&
+       printf "\0\0" > binary-file &&
+       git add binary-file &&
+       git commit -m binary2 &&
+       ! git merge F > merge.out 2> merge.err &&
+       grep "Cannot merge binary files: HEAD:binary-file vs. F:binary-file" \
+               merge.err
+'
+
 test_done