Ensure copyfile accepts str and Path-like objects

dvc/remote/local.py

@@ -236,10 +236,7 @@ def _download(
         self, from_info, to_file, name=None, no_progress_bar=False, **_kwargs
     ):
         copyfile(
-            fspath_py35(from_info),
-            to_file,
-            no_progress_bar=no_progress_bar,
-            name=name,
+            from_info, to_file, no_progress_bar=no_progress_bar, name=name
         )
 
     @staticmethod

dvc/utils/__init__.py

@@ -121,6 +121,9 @@ def copyfile(src, dest, no_progress_bar=False, name=None):
     from dvc.progress import Tqdm
     from dvc.system import System
 
+    src = fspath_py35(src)
+    dest = fspath_py35(dest)
+
     name = name if name else os.path.basename(dest)
     total = os.stat(src).st_size
 

tests/unit/utils/test_utils.py

@@ -1,11 +1,14 @@
+import filecmp
 import os
 
 import pytest
 
 from dvc.path_info import PathInfo
+from dvc.utils import copyfile
 from dvc.utils import file_md5
 from dvc.utils import fix_env
 from dvc.utils import to_chunks
+from tests.basic_env import TestDir
 
 
 @pytest.mark.parametrize(
@@ -79,3 +82,29 @@ def test_file_md5(repo_dir):
     fname = repo_dir.FOO
     fname_object = PathInfo(fname)
     assert file_md5(fname) == file_md5(fname_object)
+
+
+@pytest.mark.parametrize("path", [TestDir.DATA, TestDir.DATA_DIR])
+def test_copyfile(path, repo_dir):
+    src = repo_dir.FOO
+    dest = path
+    src_info = PathInfo(repo_dir.BAR)
+    dest_info = PathInfo(path)
+
+    copyfile(src, dest)
+    if os.path.isdir(dest):
+        assert filecmp.cmp(
+            src, os.path.join(dest, os.path.basename(src)), shallow=False
+        )
+    else:
+        assert filecmp.cmp(src, dest, shallow=False)
+
+    copyfile(src_info, dest_info)
+    if os.path.isdir(dest_info.fspath):
+        assert filecmp.cmp(
+            src_info.fspath,
+            os.path.join(dest_info.fspath, os.path.basename(src_info.fspath)),
+            shallow=False,
+        )
+    else:
+        assert filecmp.cmp(src_info.fspath, dest_info.fspath, shallow=False)