Fix ConfiguredBuildBackendHookCaller type annotations

Author: ichard26

Diff for: src/pip/_internal/operations/build/metadata_editable.py

@@ -38,4 +38,5 @@ def generate_editable_metadata(
             except InstallationSubprocessError as error:
                 raise MetadataGenerationFailed(package_details=details) from error
 
+    assert distinfo_dir is not None
     return os.path.join(metadata_dir, distinfo_dir)

Diff for: src/pip/_internal/utils/misc.py

@@ -19,12 +19,13 @@
     Any,
     BinaryIO,
     Callable,
-    Dict,
     Generator,
     Iterable,
     Iterator,
     List,
+    Mapping,
     Optional,
+    Sequence,
     TextIO,
     Tuple,
     Type,
@@ -667,7 +668,7 @@ def __init__(
     def build_wheel(
         self,
         wheel_directory: str,
-        config_settings: Optional[Dict[str, Union[str, List[str]]]] = None,
+        config_settings: Optional[Mapping[str, Any]] = None,
         metadata_directory: Optional[str] = None,
     ) -> str:
         cs = self.config_holder.config_settings
@@ -678,15 +679,15 @@ def build_wheel(
     def build_sdist(
         self,
         sdist_directory: str,
-        config_settings: Optional[Dict[str, Union[str, List[str]]]] = None,
+        config_settings: Optional[Mapping[str, Any]] = None,
     ) -> str:
         cs = self.config_holder.config_settings
         return super().build_sdist(sdist_directory, config_settings=cs)
 
     def build_editable(
         self,
         wheel_directory: str,
-        config_settings: Optional[Dict[str, Union[str, List[str]]]] = None,
+        config_settings: Optional[Mapping[str, Any]] = None,
         metadata_directory: Optional[str] = None,
     ) -> str:
         cs = self.config_holder.config_settings
@@ -695,27 +696,27 @@ def build_editable(
         )
 
     def get_requires_for_build_wheel(
-        self, config_settings: Optional[Dict[str, Union[str, List[str]]]] = None
-    ) -> List[str]:
+        self, config_settings: Optional[Mapping[str, Any]] = None
+    ) -> Sequence[str]:
         cs = self.config_holder.config_settings
         return super().get_requires_for_build_wheel(config_settings=cs)
 
     def get_requires_for_build_sdist(
-        self, config_settings: Optional[Dict[str, Union[str, List[str]]]] = None
-    ) -> List[str]:
+        self, config_settings: Optional[Mapping[str, Any]] = None
+    ) -> Sequence[str]:
         cs = self.config_holder.config_settings
         return super().get_requires_for_build_sdist(config_settings=cs)
 
     def get_requires_for_build_editable(
-        self, config_settings: Optional[Dict[str, Union[str, List[str]]]] = None
-    ) -> List[str]:
+        self, config_settings: Optional[Mapping[str, Any]] = None
+    ) -> Sequence[str]:
         cs = self.config_holder.config_settings
         return super().get_requires_for_build_editable(config_settings=cs)
 
     def prepare_metadata_for_build_wheel(
         self,
         metadata_directory: str,
-        config_settings: Optional[Dict[str, Union[str, List[str]]]] = None,
+        config_settings: Optional[Mapping[str, Any]] = None,
         _allow_fallback: bool = True,
     ) -> str:
         cs = self.config_holder.config_settings
@@ -728,9 +729,9 @@ def prepare_metadata_for_build_wheel(
     def prepare_metadata_for_build_editable(
         self,
         metadata_directory: str,
-        config_settings: Optional[Dict[str, Union[str, List[str]]]] = None,
+        config_settings: Optional[Mapping[str, Any]] = None,
         _allow_fallback: bool = True,
-    ) -> str:
+    ) -> Optional[str]:
         cs = self.config_holder.config_settings
         return super().prepare_metadata_for_build_editable(
             metadata_directory=metadata_directory,