Merge pull request #7287 from ThomasWaldmann/fix-get-item-uid-gid-win32

fix some uid/gid lookup code / tests for win32

src/borg/platform/windows.pyx

@@ -21,6 +21,9 @@ def uid2user(uid, default=None):
 
 @lru_cache(maxsize=None)
 def user2uid(user, default=None):
+    if not user:
+        # user is either None or the empty string
+        return default
     return 0
 
 
@@ -31,6 +34,9 @@ def gid2group(gid, default=None):
 
 @lru_cache(maxsize=None)
 def group2gid(group, default=None):
+    if not group:
+        # group is either None or the empty string
+        return default
     return 0
 
 

src/borg/testsuite/archive.py

@@ -14,7 +14,7 @@ from ..archive import BackupOSError, backup_io, backup_io_iter, get_item_uid_gid
 from ..helpers import msgpack
 from ..item import Item, ArchiveItem
 from ..manifest import Manifest
-from ..platform import uid2user, gid2group
+from ..platform import uid2user, gid2group, is_win32
 
 
 @pytest.fixture()
@@ -349,6 +349,11 @@ def test_get_item_uid_gid():
     assert uid == 7
     assert gid == 8
 
+    if not is_win32:
+        # due to the hack in borg.platform.windows user2uid / group2gid, these always return 0
+        # (no matter which username we ask for) and they never raise a KeyError (like e.g. for
+        # a non-existing user/group name). Thus, these tests can currently not succeed on win32.
+
         # item metadata has valid uid/gid, but non-existing user/group names.
         item = Item(path="filename", uid=9, gid=10, user="udoesnotexist", group="gdoesnotexist")