Create a new context for template triggers

homeassistant/components/template/const.py

@@ -33,3 +33,5 @@
 CONF_ATTRIBUTE_TEMPLATES = "attribute_templates"
 CONF_PICTURE = "picture"
 CONF_OBJECT_ID = "object_id"
+
+EVENT_TEMPLATE_TRIGGERED = "template_triggered"

homeassistant/components/template/coordinator.py

@@ -2,14 +2,20 @@
 from collections.abc import Callable
 import logging
 
-from homeassistant.const import EVENT_HOMEASSISTANT_START
-from homeassistant.core import CoreState, callback
+from homeassistant.const import CONF_UNIQUE_ID, EVENT_HOMEASSISTANT_START
+from homeassistant.core import Context, CoreState, callback
 from homeassistant.helpers import discovery, trigger as trigger_helper
 from homeassistant.helpers.script import Script
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
-from .const import CONF_ACTION, CONF_TRIGGER, DOMAIN, PLATFORMS
+from .const import (
+    CONF_ACTION,
+    CONF_TRIGGER,
+    DOMAIN,
+    EVENT_TEMPLATE_TRIGGERED,
+    PLATFORMS,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -85,10 +91,22 @@ async def _attach_triggers(self, start_event=None) -> None:
         )
 
     async def _handle_triggered(self, run_variables, context=None):
+        # Create a new context referring to the old context.
+        parent_id = None if context is None else context.id
+        trigger_context = Context(parent_id=parent_id)
+
+        self.hass.bus.async_fire(
+            EVENT_TEMPLATE_TRIGGERED,
+            {
+                CONF_UNIQUE_ID: self.unique_id,
+            },
+            context=trigger_context,
+        )
+
         if self._script:
-            script_result = await self._script.async_run(run_variables, context)
+            script_result = await self._script.async_run(run_variables, trigger_context)
             if script_result:
                 run_variables = script_result.variables
         self.async_set_updated_data(
-            {"run_variables": run_variables, "context": context}
+            {"run_variables": run_variables, "context": trigger_context}
         )

tests/components/template/test_binary_sensor.py

@@ -1123,7 +1123,7 @@ async def test_trigger_entity(
     assert state.attributes.get("icon") == "mdi:pirate"
     assert state.attributes.get("entity_picture") == "/local/dogs.png"
     assert state.attributes.get("plus_one") == 3
-    assert state.context is context
+    assert state.context.parent_id is context.id
 
     assert len(entity_registry.entities) == 2
     assert (
@@ -1142,7 +1142,7 @@ async def test_trigger_entity(
     assert state.attributes.get("entity_picture") == "/local/dogs.png"
     assert state.attributes.get("plus_one") == 3
     assert state.attributes.get("another") == 1
-    assert state.context is context
+    assert state.context.parent_id is context.id
 
     # Even if state itself didn't change, attributes might have changed
     hass.bus.async_fire("test_event", {"beer": 2, "uno_mas": "si"})

tests/components/template/test_sensor.py

@@ -1169,7 +1169,7 @@ async def test_trigger_entity(
     assert state.attributes.get("entity_picture") == "/local/dogs.png"
     assert state.attributes.get("plus_one") == 3
     assert state.attributes.get("unit_of_measurement") == "%"
-    assert state.context is context
+    assert state.context.parent_id is context.id
 
     assert len(entity_registry.entities) == 2
     assert (
@@ -1189,7 +1189,7 @@ async def test_trigger_entity(
     assert state.attributes.get("plus_one") == 3
     assert state.attributes.get("unit_of_measurement") == "%"
     assert state.attributes.get("state_class") == "measurement"
-    assert state.context is context
+    assert state.context.parent_id is context.id
 
 
 @pytest.mark.parametrize(("count", "domain"), [(1, "template")])
@@ -1667,4 +1667,4 @@ async def test_trigger_action(
 
     state = hass.states.get("sensor.hello_name")
     assert state.state == "3"
-    assert state.context is context
+    assert state.context.parent_id is context.id

tests/components/template/test_weather.py

@@ -635,7 +635,7 @@ async def test_trigger_action(
     state = hass.states.get("weather.hello_name")
     assert state.state == "sunny"
     assert state.attributes["temperature"] == 3.0
-    assert state.context is context
+    assert state.context.parent_id is context.id
 
 
 @pytest.mark.parametrize(("count", "domain"), [(1, "template")])
@@ -752,7 +752,7 @@ async def test_trigger_weather_services(
     assert state.attributes["cloud_coverage"] == 3.0
     assert state.attributes["dew_point"] == 3.0
     assert state.attributes["apparent_temperature"] == 3.0
-    assert state.context is context
+    assert state.context.parent_id is context.id
 
     response = await hass.services.async_call(
         WEATHER_DOMAIN,