py3: fspath source and link_name

Author: Mr. Outis

dvc/system.py

@@ -22,13 +22,15 @@ def copy(src, dest):
 
     @staticmethod
     def hardlink(source, link_name):
+        source, link_name = fspath(source), fspath(link_name)
         try:
             os.link(source, link_name)
         except OSError as exc:
             raise DvcException("failed to link") from exc
 
     @staticmethod
     def symlink(source, link_name):
+        source, link_name = fspath(source), fspath(link_name)
         try:
             os.symlink(source, link_name)
         except OSError as exc: