Fix incorrect type hint in async_setup_scanner (#63833)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/device_tracker/legacy.py

@@ -236,7 +236,7 @@ class DeviceTrackerPlatform:
         with async_start_setup(hass, [full_name]):
             try:
                 scanner = None
-                setup = None
+                setup: bool | None = None
                 if hasattr(self.platform, "async_get_scanner"):
                     scanner = await self.platform.async_get_scanner(
                         hass, {DOMAIN: self.config}
@@ -267,7 +267,7 @@ class DeviceTrackerPlatform:
                         hass, self.config, scanner, tracker.async_see, self.type
                     )
 
-                if setup is None and scanner is None:
+                if not setup and scanner is None:
                     LOGGER.error(
                         "Error setting up platform %s %s", self.type, self.name
                     )

homeassistant/components/icloud/device_tracker.py

@@ -27,7 +27,7 @@ async def async_setup_scanner(
     config: ConfigType,
     see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Old way of setting up the iCloud tracker."""
 
 

homeassistant/components/meraki/device_tracker.py

@@ -36,10 +36,12 @@ async def async_setup_scanner(
     config: ConfigType,
     async_see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Set up an endpoint for the Meraki tracker."""
     hass.http.register_view(MerakiView(config, async_see))
 
+    return True
+
 
 class MerakiView(HomeAssistantView):
     """View to handle Meraki requests."""

homeassistant/components/mqtt_json/device_tracker.py

@@ -45,7 +45,7 @@ async def async_setup_scanner(
     config: ConfigType,
     async_see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Set up the MQTT JSON tracker."""
     devices = config[CONF_DEVICES]
     qos = config[CONF_QOS]
@@ -73,6 +73,8 @@ async def async_setup_scanner(
 
         await mqtt.async_subscribe(hass, topic, async_message_received, qos)
 
+    return True
+
 
 def _parse_see_args(dev_id, data):
     """Parse the payload location parameters, into the format see expects."""

homeassistant/components/ping/device_tracker.py

@@ -87,7 +87,7 @@ async def async_setup_scanner(
     config: ConfigType,
     async_see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Set up the Host objects and return the update function."""
 
     privileged = hass.data[DOMAIN][PING_PRIVS]

homeassistant/components/traccar/device_tracker.py

@@ -168,7 +168,7 @@ async def async_setup_scanner(
     config: ConfigType,
     async_see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Validate the configuration and return a Traccar scanner."""
 
     session = async_get_clientsession(hass, config[CONF_VERIFY_SSL])

homeassistant/components/volvooncall/device_tracker.py

@@ -17,10 +17,10 @@ async def async_setup_scanner(
     config: ConfigType,
     async_see: Callable[..., Awaitable[None]],
     discovery_info: DiscoveryInfoType | None = None,
-) -> None:
+) -> bool:
     """Set up the Volvo tracker."""
     if discovery_info is None:
-        return
+        return False
 
     vin, component, attr, slug_attr = discovery_info
     data = hass.data[DATA_KEY]
@@ -39,3 +39,5 @@ async def async_setup_scanner(
         )
 
     async_dispatcher_connect(hass, SIGNAL_STATE_UPDATED, see_vehicle)
+
+    return True