dashboard: move storage json update to a background task in edit save (#6280)

* dashboard: move storage json update to a background task in edit save

* dashboard: move storage json update to a background task in edit save

* fix typing

* docs

esphome/dashboard/const.py

@@ -8,3 +8,5 @@ MAX_EXECUTOR_WORKERS = 48
 
 
 SENTINEL = object()
+
+DASHBOARD_COMMAND = ["esphome", "--dashboard"]

esphome/dashboard/core.py

@@ -1,11 +1,13 @@
 from __future__ import annotations
 
 import asyncio
+import contextlib
 import logging
 import threading
 from dataclasses import dataclass
 from functools import partial
 from typing import TYPE_CHECKING, Any, Callable
+from collections.abc import Coroutine
 
 from ..zeroconf import DiscoveredImport
 from .dns import DNSCache
@@ -71,6 +73,7 @@ class ESPHomeDashboard:
         "mdns_status",
         "settings",
         "dns_cache",
+        "_background_tasks",
     )
 
     def __init__(self) -> None:
@@ -85,6 +88,7 @@ class ESPHomeDashboard:
         self.mdns_status: MDNSStatus | None = None
         self.settings = DashboardSettings()
         self.dns_cache = DNSCache()
+        self._background_tasks: set[asyncio.Task] = set()
 
     async def async_setup(self) -> None:
         """Setup the dashboard."""
@@ -132,7 +136,19 @@ class ESPHomeDashboard:
             if settings.status_use_mqtt:
                 status_thread_mqtt.join()
                 self.mqtt_ping_request.set()
+            for task in self._background_tasks:
+                task.cancel()
+                with contextlib.suppress(asyncio.CancelledError):
+                    await task
             await asyncio.sleep(0)
 
+    def async_create_background_task(
+        self, coro: Coroutine[Any, Any, Any]
+    ) -> asyncio.Task:
+        """Create a background task."""
+        task = self.loop.create_task(coro)
+        task.add_done_callback(self._background_tasks.discard)
+        return task
+
 
 DASHBOARD = ESPHomeDashboard()

esphome/dashboard/entries.py

@@ -10,12 +10,14 @@ from esphome import const, util
 from esphome.storage_json import StorageJSON, ext_storage_path
 
 from .const import (
+    DASHBOARD_COMMAND,
     EVENT_ENTRY_ADDED,
     EVENT_ENTRY_REMOVED,
     EVENT_ENTRY_STATE_CHANGED,
     EVENT_ENTRY_UPDATED,
 )
 from .enum import StrEnum
+from .util.subprocess import async_run_system_command
 
 if TYPE_CHECKING:
     from .core import ESPHomeDashboard
@@ -235,6 +237,14 @@ class DashboardEntries:
             )
         return path_to_cache_key
 
+    def async_schedule_storage_json_update(self, filename: str) -> None:
+        """Schedule a task to update the storage JSON file."""
+        self._dashboard.async_create_background_task(
+            async_run_system_command(
+                [*DASHBOARD_COMMAND, "compile", "--only-generate", filename]
+            )
+        )
+
 
 class DashboardEntry:
     """Represents a single dashboard entry.

esphome/dashboard/web_server.py

@@ -9,11 +9,11 @@ import hashlib
 import json
 import logging
 import os
-import time
 import secrets
 import shutil
 import subprocess
 import threading
+import time
 from collections.abc import Iterable
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Callable, TypeVar
@@ -40,6 +40,7 @@ from esphome.storage_json import StorageJSON, ext_storage_path, trash_storage_pa
 from esphome.util import get_serial_ports, shlex_quote
 from esphome.yaml_util import FastestAvailableSafeLoader
 
+from .const import DASHBOARD_COMMAND
 from .core import DASHBOARD
 from .entries import EntryState, entry_state_to_bool
 from .util.file import write_file
@@ -286,9 +287,6 @@ class EsphomeCommandWebSocket(tornado.websocket.WebSocketHandler):
         raise NotImplementedError
 
 
-DASHBOARD_COMMAND = ["esphome", "--dashboard"]
-
-
 class EsphomePortCommandWebSocket(EsphomeCommandWebSocket):
     """Base class for commands that require a port."""
 
@@ -855,9 +853,7 @@ class EditRequestHandler(BaseHandler):
         loop = asyncio.get_running_loop()
         await loop.run_in_executor(None, self._write_file, filename, self.request.body)
         # Ensure the StorageJSON is updated as well
-        await async_run_system_command(
+        DASHBOARD.entries.async_schedule_storage_json_update(filename)
-            [*DASHBOARD_COMMAND, "compile", "--only-generate", filename]
-        )
         self.set_status(200)