Enable unreachable code checks in lib/ with mypy (#3521)

archinstall/lib/disk/disk_menu.py

@@ -176,20 +176,13 @@ class DiskLayoutConfigurationMenu(AbstractSubMenu[DiskLayoutConfiguration]):
 			alignment=Alignment.CENTER,
 		).run()
 
-		snapshot_type: SnapshotType | None = None
-
 		match result.type_:
 			case ResultType.Skip:
 				return preset
 			case ResultType.Reset:
 				return None
 			case ResultType.Selection:
-				snapshot_type = result.get_value()
-
-		if not snapshot_type:
-			return None
-
-		return SnapshotConfig(snapshot_type=snapshot_type)
+				return SnapshotConfig(snapshot_type=result.get_value())
 
 	def _prev_disk_layouts(self, item: MenuItem) -> str | None:
 		if not item.value:

archinstall/lib/interactions/network_menu.py

@@ -186,7 +186,7 @@ def ask_to_configure_network(preset: NetworkConfiguration | None) -> NetworkConf
 	if preset:
 		group.set_selected_by_value(preset.type)
 
-	result = SelectMenu[NetworkConfiguration](
+	result = SelectMenu[NicType](
 		group,
 		alignment=Alignment.CENTER,
 		frame=FrameProperties.min(tr('Network configuration')),

archinstall/lib/interactions/system_conf.py

@@ -174,5 +174,3 @@ def ask_for_swap(preset: bool = True) -> bool:
 			return result.item() == MenuItem.yes()
 		case ResultType.Reset:
 			raise ValueError('Unhandled result type')
-
-	return preset

archinstall/lib/locale/locale_menu.py

@@ -149,5 +149,3 @@ def select_kb_layout(preset: str | None = None) -> str | None:
 			return preset
 		case _:
 			raise ValueError('Unhandled return type')
-
-	return None

archinstall/lib/models/device_model.py

@@ -1490,9 +1490,8 @@ class DiskEncryption:
 	def should_generate_encryption_file(self, dev: PartitionModification | LvmVolume) -> bool:
 		if isinstance(dev, PartitionModification):
 			return dev in self.partitions and dev.mountpoint != Path('/')
-		elif isinstance(dev, LvmVolume):
+		else:
 			return dev in self.lvm_volumes and dev.mountpoint != Path('/')
-		return False
 
 	def json(self) -> _DiskEncryptionSerialization:
 		obj: _DiskEncryptionSerialization = {

archinstall/lib/output.py

@@ -46,7 +46,7 @@ class FormattedOutput:
 		elif is_dataclass(o):
 			return asdict(o)
 		else:
-			return o.__dict__
+			return o.__dict__  # type: ignore[unreachable]
 
 	@classmethod
 	def as_table(

archinstall/lib/profile/profile_menu.py

@@ -237,5 +237,3 @@ def select_profile(
 					pass
 
 			return current_profile
-
-	return None

pyproject.toml

@@ -100,7 +100,6 @@ module = "archinstall.lib.*"
 disallow_incomplete_defs = false
 disallow_untyped_defs = false
 warn_return_any = false
-warn_unreachable = false
 
 [[tool.mypy.overrides]]
 module = "archinstall.lib.disk.*"