Better handle file not found when loading YAML (#23908)

* Better handle file not found

* Lint

homeassistant/components/apns/notify.py

@@ -1,6 +1,5 @@
 """APNS Notification platform."""
 import logging
-import os
 
 import voluptuous as vol
 
@@ -149,7 +148,8 @@ class ApnsNotificationService(BaseNotificationService):
         self.devices = {}
         self.device_states = {}
         self.topic = topic
-        if os.path.isfile(self.yaml_path):
+
+        try:
             self.devices = {
                 str(key): ApnsDevice(
                     str(key),
@@ -160,6 +160,8 @@ class ApnsNotificationService(BaseNotificationService):
                 for (key, value) in
                 load_yaml_config_file(self.yaml_path).items()
             }
+        except FileNotFoundError:
+            pass
 
         tracking_ids = [
             device.full_tracking_device_id

homeassistant/components/http/ban.py

@@ -3,7 +3,6 @@ from collections import defaultdict
 from datetime import datetime
 from ipaddress import ip_address
 import logging
-import os
 
 from aiohttp.web import middleware
 from aiohttp.web_exceptions import HTTPForbidden, HTTPUnauthorized
@@ -155,11 +154,10 @@ async def async_load_ip_bans_config(hass: HomeAssistant, path: str):
     """Load list of banned IPs from config file."""
     ip_list = []
 
-    if not os.path.isfile(path):
-        return ip_list
-
     try:
         list_ = await hass.async_add_executor_job(load_yaml_config_file, path)
+    except FileNotFoundError:
+        return ip_list
     except HomeAssistantError as err:
         _LOGGER.error('Unable to load %s: %s', path, str(err))
         return ip_list

homeassistant/config.py

@@ -363,13 +363,11 @@ def find_config_file(config_dir: Optional[str]) -> Optional[str]:
 def load_yaml_config_file(config_path: str) -> Dict[Any, Any]:
     """Parse a YAML configuration file.
 
+    Raises FileNotFoundError or HomeAssistantError.
+
     This method needs to run in an executor.
     """
-    try:
-        conf_dict = load_yaml(config_path)
-    except FileNotFoundError as err:
-        raise HomeAssistantError("Config file not found: {}".format(
-            getattr(err, 'filename', err)))
+    conf_dict = load_yaml(config_path)
 
     if not isinstance(conf_dict, dict):
         msg = "The configuration file {} does not contain a dictionary".format(

homeassistant/scripts/check_config.py

@@ -312,6 +312,8 @@ async def check_ha_config_file(hass):
             return result.add_error("File configuration.yaml not found.")
         config = await hass.async_add_executor_job(
             load_yaml_config_file, config_path)
+    except FileNotFoundError:
+        return result.add_error("File not found: {}".format(config_path))
     except HomeAssistantError as err:
         return result.add_error(
             "Error loading {}: {}".format(config_path, err))