Add support for owner()

audbackend/core/backend/minio.py

@@ -1,4 +1,5 @@
 import configparser
+import getpass
 import os
 import tempfile
 import typing
@@ -212,6 +213,7 @@ def _copy_file(
                 self.repository,
                 dst_path,
                 minio.commonconfig.CopySource(self.repository, src_path),
+                metadata=_metadata(),
             )
 
     def _create(
@@ -329,9 +331,11 @@ def _owner(
     ) -> str:
         r"""Get owner of file on backend."""
         path = self.path(path)
-        # TODO: owner seems to be empty,
-        # need to check if we have to manage this ourselves?
-        owner = self._client.stat_object(self.repository, path).owner_name
+        # NOTE:
+        # we use a custom metadata entry to track the owner
+        # as stats.owner_name is always empty.
+        stats = self._client.stat_object(self.repository, path)
+        owner = stats.metadata["x-amz-meta-owner"]
         return owner
 
     def path(
@@ -369,7 +373,12 @@ def _put_file(
             )
             print(desc, end="\r")
 
-        self._client.fput_object(self.repository, dst_path, src_path)
+        self._client.fput_object(
+            self.repository,
+            dst_path,
+            src_path,
+            metadata=_metadata(),
+        )
 
         if verbose:  # pragma: no cover
             # Clear progress line
@@ -391,3 +400,13 @@ def _size(
         path = self.path(path)
         size = self._client.stat_object(self.repository, path).size
         return size
+
+
+def _metadata():
+    """Dictionary with owner entry.
+
+    When uploaded as metadata to MinIO,
+    it can be accessed under ``stat_object(...).metadata["x-amz-meta-owner"]``.
+
+    """
+    return {"owner": getpass.getuser()}

tests/conftest.py

@@ -77,11 +77,6 @@ def owner(request):
     ):
         host_wo_https = pytest.HOSTS["artifactory"][8:]
         owner = backend_cls.get_authentication(host_wo_https)[0]
-    elif (
-        hasattr(audbackend.backend, "Minio") and backend_cls == audbackend.backend.Minio
-    ):
-        # There seems to be a MinIO bug here
-        owner = None
     else:
         if os.name == "nt":
             owner = "Administrators"