Ensure translations for other integrations can be loaded if one integration fails (#110748)

* load failure

* merge

homeassistant/helpers/translation.py

@@ -114,7 +114,7 @@ def _merge_resources(
         # We are going to merge the translations for the custom device classes into
         # the translations of sensor.
 
-        new_value = translation_strings[component].get(category)
+        new_value = translation_strings.get(component, {}).get(category)
 
         if new_value is None:
             continue
@@ -135,17 +135,17 @@ def _merge_resources(
 
 
 def build_resources(
-    translation_strings: dict[str, dict[str, Any]],
+    translation_strings: dict[str, dict[str, dict[str, Any] | str]],
     components: set[str],
     category: str,
 ) -> dict[str, dict[str, Any] | str]:
     """Build the resources response for the given components."""
     # Build response
     return {
-        component: translation_strings[component][category]
+        component: category_strings
         for component in components
-        if category in translation_strings[component]
+        if (component_strings := translation_strings.get(component))
-        and translation_strings[component][category] is not None
+        and (category_strings := component_strings.get(category))
     }
 
 
@@ -161,7 +161,8 @@ async def _async_get_component_strings(
     files_to_load = {}
     for loaded in components:
         domain = loaded.partition(".")[0]
-        integration = integrations[domain]
+        if not (integration := integrations.get(domain)):
+            continue
 
         path = component_translation_path(loaded, language, integration)
         # No translation available
@@ -273,7 +274,10 @@ class _TranslationCache:
         ints_or_excs = await async_get_integrations(self.hass, domains)
         for domain, int_or_exc in ints_or_excs.items():
             if isinstance(int_or_exc, Exception):
-                raise int_or_exc
+                _LOGGER.warning(
+                    "Failed to load integration for translation: %s", int_or_exc
+                )
+                continue
             integrations[domain] = int_or_exc
 
         for translation_strings in await asyncio.gather(

tests/helpers/test_translation.py

@@ -435,6 +435,37 @@ async def test_translation_merging_loaded_together(
     assert translations == hue_translations | homekit_translations
 
 
+async def test_ensure_translations_still_load_if_one_integration_fails(
+    hass: HomeAssistant, caplog: pytest.LogCaptureFixture
+) -> None:
+    """Test that if one integration fails to load we can still get translations."""
+    hass.config.components.add("sensor")
+    hass.config.components.add("broken")
+
+    sensor_integration = await loader.async_get_integration(hass, "sensor")
+
+    with patch(
+        "homeassistant.helpers.translation.async_get_integrations",
+        return_value={
+            "sensor": sensor_integration,
+            "broken": Exception("unhandled failure"),
+        },
+    ):
+        translations = await translation.async_get_translations(
+            hass, "en", "entity_component", integrations={"sensor", "broken"}
+        )
+        assert "Failed to load integration for translation" in caplog.text
+        assert "broken" in caplog.text
+
+    assert translations
+
+    sensor_translations = await translation.async_get_translations(
+        hass, "en", "entity_component", integrations={"sensor"}
+    )
+
+    assert translations == sensor_translations
+
+
 async def test_caching(hass: HomeAssistant) -> None:
     """Test we cache data."""
     hass.config.components.add("sensor")