Fix filelock: use current umask for filelock >= 3.10 (#6631)

fix filelock umask

src/datasets/utils/_filelock.py

@@ -19,21 +19,31 @@
 
 from filelock import FileLock as FileLock_
 from filelock import UnixFileLock
+from filelock import __version__ as _filelock_version
+from packaging import version
 
 
 class FileLock(FileLock_):
     """
     A `filelock.FileLock` initializer that handles long paths.
+    It also uses the current umask for lock files.
     """
 
     MAX_FILENAME_LENGTH = 255
 
     def __init__(self, lock_file, *args, **kwargs):
+        # The "mode" argument is required if we want to use the current umask in filelock >= 3.10
+        # In previous previous it was already using the current umask.
+        if "mode" not in kwargs and version.parse(_filelock_version) >= version.parse("3.10.0"):
+            umask = os.umask(0o666)
+            os.umask(umask)
+            kwargs["mode"] = 0o666 & ~umask
         lock_file = self.hash_filename_if_too_long(lock_file)
         super().__init__(lock_file, *args, **kwargs)
 
     @classmethod
     def hash_filename_if_too_long(cls, path: str) -> str:
+        path = os.path.abspath(os.path.expanduser(path))
         filename = os.path.basename(path)
         max_filename_length = cls.MAX_FILENAME_LENGTH
         if issubclass(cls, UnixFileLock):