Fix dvc add -o issue #7357

dvc/stage/__init__.py

@@ -404,6 +404,7 @@ class Stage(params.StageParams):
         out.transfer(source, odb=odb, jobs=kwargs.get("jobs"))
         if not to_remote:
             out.checkout()
+            out.ignore()
 
     @rwlocked(read=["deps"], write=["outs"])
     def reproduce(self, interactive=False, **kwargs):

tests/func/test_add.py

@@ -1033,6 +1033,13 @@ def test_add_to_cache_file(tmp_dir, dvc, local_cloud):
     assert foo.read_text() == "foo"
 
 
+def test_add_with_out(tmp_dir, scm, dvc):
+    tmp_dir.gen({"foo": "foo"})
+    dvc.add("foo", out="out_foo")
+    gitignore_content = get_gitignore_content()
+    assert "/out_foo" in gitignore_content
+
+
 def test_add_to_cache_different_name(tmp_dir, dvc, local_cloud):
     local_cloud.gen({"data": {"foo": "foo", "bar": "bar"}})