[PATCH v2 9/9] mv: check overwrite for in-to-out move

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Add checking logic for overwriting when moving from in-cone to
out-of-cone. It is the index version of the original overwrite logic.

Helped-by: Derrick Stolee <derrickstolee@xxxxxxxxxx>
Signed-off-by: Shaoxuan Yuan <shaoxuan.yuan02@xxxxxxxxx>
---
 builtin/mv.c                  | 12 ++++++++++++
 t/t7002-mv-sparse-checkout.sh |  2 +-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/builtin/mv.c b/builtin/mv.c
index 765a1e8eb5..70996d582f 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -367,6 +367,18 @@ int cmd_mv(int argc, const char **argv, const char *prefix)
 			goto act_on_entry;
 		}
 
+		if (ignore_sparse &&
+		    (dst_mode & SKIP_WORKTREE_DIR) &&
+		    index_entry_exists(&the_index, dst, strlen(dst))) {
+			bad = _("destination exists in the index");
+			if (force) {
+				if (verbose)
+					warning(_("overwriting '%s'"), dst);
+				bad = NULL;
+			} else {
+				goto act_on_entry;
+			}
+		}
 		/*
 		 * We check if the paths are in the sparse-checkout
 		 * definition as a very final check, since that
diff --git a/t/t7002-mv-sparse-checkout.sh b/t/t7002-mv-sparse-checkout.sh
index f0b32a2f70..50bcca583c 100755
--- a/t/t7002-mv-sparse-checkout.sh
+++ b/t/t7002-mv-sparse-checkout.sh
@@ -323,7 +323,7 @@ test_expect_success 'move clean path from in-cone to out-of-cone' '
 	grep "S folder1/d" actual
 '
 
-test_expect_failure 'move clean path from in-cone to out-of-cone overwrite' '
+test_expect_success 'move clean path from in-cone to out-of-cone overwrite' '
 	test_when_finished "cleanup_sparse_checkout" &&
 	setup_sparse_checkout &&
 	echo "sub/file1 overwrite" >sub/file1 &&
-- 
2.37.0




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