Allow overriding blueprints on import (#103340)

Co-authored-by: Franck Nijhof <git@frenck.dev>

homeassistant/components/automation/helpers.py

@@ -1,5 +1,6 @@
 """Helpers for automation integration."""
 from homeassistant.components import blueprint
+from homeassistant.const import SERVICE_RELOAD
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.singleton import singleton
 
@@ -15,8 +16,17 @@ def _blueprint_in_use(hass: HomeAssistant, blueprint_path: str) -> bool:
     return len(automations_with_blueprint(hass, blueprint_path)) > 0
 
 
+async def _reload_blueprint_automations(
+    hass: HomeAssistant, blueprint_path: str
+) -> None:
+    """Reload all automations that rely on a specific blueprint."""
+    await hass.services.async_call(DOMAIN, SERVICE_RELOAD)
+
+
 @singleton(DATA_BLUEPRINTS)
 @callback
 def async_get_blueprints(hass: HomeAssistant) -> blueprint.DomainBlueprints:
     """Get automation blueprints."""
-    return blueprint.DomainBlueprints(hass, DOMAIN, LOGGER, _blueprint_in_use)
+    return blueprint.DomainBlueprints(
+        hass, DOMAIN, LOGGER, _blueprint_in_use, _reload_blueprint_automations
+    )

homeassistant/components/blueprint/models.py

@@ -2,7 +2,7 @@
 from __future__ import annotations
 
 import asyncio
-from collections.abc import Callable
+from collections.abc import Awaitable, Callable
 import logging
 import pathlib
 import shutil
@@ -189,12 +189,14 @@ class DomainBlueprints:
         domain: str,
         logger: logging.Logger,
         blueprint_in_use: Callable[[HomeAssistant, str], bool],
+        reload_blueprint_consumers: Callable[[HomeAssistant, str], Awaitable[None]],
     ) -> None:
         """Initialize a domain blueprints instance."""
         self.hass = hass
         self.domain = domain
         self.logger = logger
         self._blueprint_in_use = blueprint_in_use
+        self._reload_blueprint_consumers = reload_blueprint_consumers
         self._blueprints: dict[str, Blueprint | None] = {}
         self._load_lock = asyncio.Lock()
 
@@ -283,7 +285,7 @@ class DomainBlueprints:
                 blueprint = await self.hass.async_add_executor_job(
                     self._load_blueprint, blueprint_path
                 )
-            except Exception:
+            except FailedToLoad:
                 self._blueprints[blueprint_path] = None
                 raise
 
@@ -315,31 +317,41 @@ class DomainBlueprints:
         await self.hass.async_add_executor_job(path.unlink)
         self._blueprints[blueprint_path] = None
 
-    def _create_file(self, blueprint: Blueprint, blueprint_path: str) -> None:
-        """Create blueprint file."""
+    def _create_file(
+        self, blueprint: Blueprint, blueprint_path: str, allow_override: bool
+    ) -> bool:
+        """Create blueprint file.
+
+        Returns true if the action overrides an existing blueprint.
+        """
 
         path = pathlib.Path(
             self.hass.config.path(BLUEPRINT_FOLDER, self.domain, blueprint_path)
         )
-        if path.exists():
+        exists = path.exists()
+
+        if not allow_override and exists:
             raise FileAlreadyExists(self.domain, blueprint_path)
 
         path.parent.mkdir(parents=True, exist_ok=True)
         path.write_text(blueprint.yaml(), encoding="utf-8")
+        return exists
 
     async def async_add_blueprint(
-        self, blueprint: Blueprint, blueprint_path: str
-    ) -> None:
+        self, blueprint: Blueprint, blueprint_path: str, allow_override=False
+    ) -> bool:
         """Add a blueprint."""
-        if not blueprint_path.endswith(".yaml"):
-            blueprint_path = f"{blueprint_path}.yaml"
-
-        await self.hass.async_add_executor_job(
-            self._create_file, blueprint, blueprint_path
+        overrides_existing = await self.hass.async_add_executor_job(
+            self._create_file, blueprint, blueprint_path, allow_override
         )
 
         self._blueprints[blueprint_path] = blueprint
 
+        if overrides_existing:
+            await self._reload_blueprint_consumers(self.hass, blueprint_path)
+
+        return overrides_existing
+
     async def async_populate(self) -> None:
         """Create folder if it doesn't exist and populate with examples."""
         if self._blueprints:

homeassistant/components/blueprint/websocket_api.py

@@ -14,7 +14,7 @@ from homeassistant.util import yaml
 
 from . import importer, models
 from .const import DOMAIN
-from .errors import FileAlreadyExists
+from .errors import FailedToLoad, FileAlreadyExists
 
 
 @callback
@@ -81,6 +81,23 @@ async def ws_import_blueprint(
         )
         return
 
+    # Check it exists and if so, which automations are using it
+    domain = imported_blueprint.blueprint.metadata["domain"]
+    domain_blueprints: models.DomainBlueprints | None = hass.data.get(DOMAIN, {}).get(
+        domain
+    )
+    if domain_blueprints is None:
+        connection.send_error(
+            msg["id"], websocket_api.ERR_INVALID_FORMAT, "Unsupported domain"
+        )
+        return
+
+    suggested_path = f"{imported_blueprint.suggested_filename}.yaml"
+    try:
+        exists = bool(await domain_blueprints.async_get_blueprint(suggested_path))
+    except FailedToLoad:
+        exists = False
+
     connection.send_result(
         msg["id"],
         {
@@ -90,6 +107,7 @@ async def ws_import_blueprint(
                 "metadata": imported_blueprint.blueprint.metadata,
             },
             "validation_errors": imported_blueprint.blueprint.validate(),
+            "exists": exists,
         },
     )
 
@@ -101,6 +119,7 @@ async def ws_import_blueprint(
         vol.Required("path"): cv.path,
         vol.Required("yaml"): cv.string,
         vol.Optional("source_url"): cv.url,
+        vol.Optional("allow_override"): bool,
     }
 )
 @websocket_api.async_response
@@ -130,8 +149,13 @@ async def ws_save_blueprint(
         connection.send_error(msg["id"], websocket_api.ERR_INVALID_FORMAT, str(err))
         return
 
+    if not path.endswith(".yaml"):
+        path = f"{path}.yaml"
+
     try:
-        await domain_blueprints[domain].async_add_blueprint(blueprint, path)
+        overrides_existing = await domain_blueprints[domain].async_add_blueprint(
+            blueprint, path, allow_override=msg.get("allow_override", False)
+        )
     except FileAlreadyExists:
         connection.send_error(msg["id"], "already_exists", "File already exists")
         return
@@ -141,6 +165,9 @@ async def ws_save_blueprint(
 
     connection.send_result(
         msg["id"],
+        {
+            "overrides_existing": overrides_existing,
+        },
     )
 
 

homeassistant/components/script/helpers.py

@@ -1,5 +1,6 @@
 """Helpers for automation integration."""
 from homeassistant.components.blueprint import DomainBlueprints
+from homeassistant.const import SERVICE_RELOAD
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.singleton import singleton
 
@@ -15,8 +16,15 @@ def _blueprint_in_use(hass: HomeAssistant, blueprint_path: str) -> bool:
     return len(scripts_with_blueprint(hass, blueprint_path)) > 0
 
 
+async def _reload_blueprint_scripts(hass: HomeAssistant, blueprint_path: str) -> None:
+    """Reload all script that rely on a specific blueprint."""
+    await hass.services.async_call(DOMAIN, SERVICE_RELOAD)
+
+
 @singleton(DATA_BLUEPRINTS)
 @callback
 def async_get_blueprints(hass: HomeAssistant) -> DomainBlueprints:
     """Get script blueprints."""
-    return DomainBlueprints(hass, DOMAIN, LOGGER, _blueprint_in_use)
+    return DomainBlueprints(
+        hass, DOMAIN, LOGGER, _blueprint_in_use, _reload_blueprint_scripts
+    )

tests/components/blueprint/test_models.py

@@ -1,6 +1,6 @@
 """Test blueprint models."""
 import logging
-from unittest.mock import patch
+from unittest.mock import AsyncMock, patch
 
 import pytest
 
@@ -49,7 +49,7 @@ def blueprint_2():
 def domain_bps(hass):
     """Domain blueprints fixture."""
     return models.DomainBlueprints(
-        hass, "automation", logging.getLogger(__name__), None
+        hass, "automation", logging.getLogger(__name__), None, AsyncMock()
     )
 
 
@@ -257,13 +257,9 @@ async def test_domain_blueprints_inputs_from_config(domain_bps, blueprint_1) ->
 async def test_domain_blueprints_add_blueprint(domain_bps, blueprint_1) -> None:
     """Test DomainBlueprints.async_add_blueprint."""
     with patch.object(domain_bps, "_create_file") as create_file_mock:
-        # Should add extension when not present.
-        await domain_bps.async_add_blueprint(blueprint_1, "something")
+        await domain_bps.async_add_blueprint(blueprint_1, "something.yaml")
         assert create_file_mock.call_args[0][1] == "something.yaml"
 
-        await domain_bps.async_add_blueprint(blueprint_1, "something2.yaml")
-        assert create_file_mock.call_args[0][1] == "something2.yaml"
-
     # Should be in cache.
     with patch.object(domain_bps, "_load_blueprint") as mock_load:
         assert await domain_bps.async_get_blueprint("something.yaml") == blueprint_1

tests/components/blueprint/test_websocket_api.py

@@ -3,6 +3,7 @@ from pathlib import Path
 from unittest.mock import Mock, patch
 
 import pytest
+import yaml
 
 from homeassistant.core import HomeAssistant
 from homeassistant.setup import async_setup_component
@@ -129,6 +130,52 @@ async def test_import_blueprint(
             },
         },
         "validation_errors": None,
+        "exists": False,
+    }
+
+
+async def test_import_blueprint_update(
+    hass: HomeAssistant,
+    aioclient_mock: AiohttpClientMocker,
+    hass_ws_client: WebSocketGenerator,
+    setup_bp,
+) -> None:
+    """Test importing blueprints."""
+    raw_data = Path(
+        hass.config.path("blueprints/automation/in_folder/in_folder_blueprint.yaml")
+    ).read_text()
+
+    aioclient_mock.get(
+        "https://raw.githubusercontent.com/in_folder/home-assistant-config/main/blueprints/automation/in_folder_blueprint.yaml",
+        text=raw_data,
+    )
+
+    client = await hass_ws_client(hass)
+    await client.send_json(
+        {
+            "id": 5,
+            "type": "blueprint/import",
+            "url": "https://github.com/in_folder/home-assistant-config/blob/main/blueprints/automation/in_folder_blueprint.yaml",
+        }
+    )
+
+    msg = await client.receive_json()
+
+    assert msg["id"] == 5
+    assert msg["success"]
+    assert msg["result"] == {
+        "suggested_filename": "in_folder/in_folder_blueprint",
+        "raw_data": raw_data,
+        "blueprint": {
+            "metadata": {
+                "domain": "automation",
+                "input": {"action": None, "trigger": None},
+                "name": "In Folder Blueprint",
+                "source_url": "https://github.com/in_folder/home-assistant-config/blob/main/blueprints/automation/in_folder_blueprint.yaml",
+            }
+        },
+        "validation_errors": None,
+        "exists": True,
     }
 
 
@@ -212,6 +259,42 @@ async def test_save_existing_file(
     assert msg["error"] == {"code": "already_exists", "message": "File already exists"}
 
 
+async def test_save_existing_file_override(
+    hass: HomeAssistant,
+    aioclient_mock: AiohttpClientMocker,
+    hass_ws_client: WebSocketGenerator,
+) -> None:
+    """Test saving blueprints."""
+
+    client = await hass_ws_client(hass)
+    with patch("pathlib.Path.write_text") as write_mock:
+        await client.send_json(
+            {
+                "id": 7,
+                "type": "blueprint/save",
+                "path": "test_event_service",
+                "yaml": 'blueprint: {name: "name", domain: "automation"}',
+                "domain": "automation",
+                "source_url": "https://github.com/balloob/home-assistant-config/blob/main/blueprints/automation/test_event_service.yaml",
+                "allow_override": True,
+            }
+        )
+
+        msg = await client.receive_json()
+
+    assert msg["id"] == 7
+    assert msg["success"]
+    assert msg["result"] == {"overrides_existing": True}
+    assert yaml.safe_load(write_mock.mock_calls[0][1][0]) == {
+        "blueprint": {
+            "name": "name",
+            "domain": "automation",
+            "source_url": "https://github.com/balloob/home-assistant-config/blob/main/blueprints/automation/test_event_service.yaml",
+            "input": {},
+        }
+    }
+
+
 async def test_save_file_error(
     hass: HomeAssistant,
     aioclient_mock: AiohttpClientMocker,