push: use reflink/copy with FileStorage

We surely don't want to make symlinks or hardlinks during push, so it
is better to just explicitly state what we want.

Otherwise there could be a situation where we are pushing from local odb
cache to a version aware remote and we run into cache having unsupported
link types configured as the only option (e.g. `reflink,symlink,hardlink`)
and thus failing to push.

setup.cfg

@@ -28,7 +28,7 @@ install_requires=
     dictdiffer>=0.8.1
     pygtrie>=2.3.2
     shortuuid>=0.5.0
-    dvc-objects>=1.0.1,<2
+    dvc-objects>=1.1.0,<2
     diskcache>=5.2.1
     attrs>=21.3.0
     sqltrie>=0.8.0,<1

src/dvc_data/index/checkout.py

@@ -78,6 +78,7 @@ def _create_files(  # noqa: C901
     storage: str = "cache",
     onerror=None,
     state: Optional["StateBase"] = None,
+    links: Optional[List[str]] = None,
 ):
     if index is None:
         return
@@ -119,8 +120,7 @@ def _create_files(  # noqa: C901
         src_fs = storage_obj.fs
         entries, src_paths, dest_paths = zip(*args)
 
-        links = None
-        if isinstance(storage_obj, ObjectStorage):
+        if links is None and isinstance(storage_obj, ObjectStorage):
             links = storage_obj.odb.cache_types
 
         transfer(
@@ -353,6 +353,7 @@ def apply(
     storage: str = "cache",
     onerror: Optional[Callable] = None,
     state: Optional["StateBase"] = None,
+    links: Optional[List[str]] = None,
 ) -> None:
     if fs.version_aware and not latest_only:
         if callback == DEFAULT_CALLBACK:
@@ -390,6 +391,7 @@ def apply(
         callback=callback,
         update_meta=update_meta,
         state=state,
+        links=links,
     )
 
     _chmod_files(diff.files_chmod, path, fs)

src/dvc_data/index/push.py

@@ -67,6 +67,7 @@ def push(
                     storage="cache",
                     jobs=jobs,
                     callback=cb,
+                    links=["reflink", "copy"],
                 )
                 fetched += len(diff.changes.get("added", []))