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-rw-r--r--src/buildstream/source.py17
1 files changed, 8 insertions, 9 deletions
diff --git a/src/buildstream/source.py b/src/buildstream/source.py
index f15d5a628..9726d257b 100644
--- a/src/buildstream/source.py
+++ b/src/buildstream/source.py
@@ -159,21 +159,20 @@ Class Reference
import os
from contextlib import contextmanager
-from typing import Iterable, Iterator, Optional, Tuple, TYPE_CHECKING
+from typing import TYPE_CHECKING, Iterable, Iterator, Optional, Tuple
from . import _yaml, utils
-from .node import MappingNode
-from .plugin import Plugin
-from .types import SourceRef, Union, List
+from ._cachekey import generate_key
from ._exceptions import BstError, ImplError, PluginError
-from .exceptions import ErrorDomain
from ._loader.metasource import MetaSource
from ._projectrefs import ProjectRefStorage
-from ._cachekey import generate_key
-from .storage import CasBasedDirectory
-from .storage import FileBasedDirectory
-from .storage.directory import Directory, VirtualDirectoryError
from ._variables import Variables
+from .exceptions import ErrorDomain
+from .node import MappingNode
+from .plugin import Plugin
+from .storage import CasBasedDirectory, FileBasedDirectory
+from .storage.directory import Directory, VirtualDirectoryError
+from .types import List, SourceRef, Union
if TYPE_CHECKING:
from typing import Any, Dict, Set