Ignore directories with leading dot

CHANGELOG.rst

@@ -16,6 +16,8 @@ Version 0.16.0
 - Fix crash of Google storages when saving token file.
 - Make DAV discovery more RFC-conformant, see :ghpr:`585`.
 - Vdirsyncer is now tested against Xandikos, see :ghpr:`601`.
+- Subfolders with a leading dot are now ignored during discover for
+  ``filesystem`` storage.
 - Statuses are now stored in a sqlite database. Old data is automatically
   migrated. Users with really large datasets should encounter performance
   improvements. This means that **sqlite3 is now a dependency of vdirsyncer**.

vdirsyncer/storage/filesystem.py

@@ -23,6 +23,9 @@ class FilesystemStorage(Storage):
     Can be used with `khal <http://lostpackets.de/khal/>`_. See :doc:`vdir` for
     a more formal description of the format.
 
+    Directories with a leading dot are ignored to make usage of e.g. version
+    control easier.
+
     :param path: Absolute path to a vdir/collection. If this is used in
         combination with the ``collections`` parameter in a pair-section, this
         should point to a directory of vdirs instead.
@@ -72,10 +75,8 @@ class FilesystemStorage(Storage):
     def _validate_collection(cls, path):
         if not os.path.isdir(path):
             return False
-        for item in os.listdir(path):
-            item_path = os.path.join(path, item)
-            if os.path.isdir(item_path):
-                return False
+        if os.path.basename(path).startswith('.'):
+            return False
         return True
 
     @classmethod