Add default_config component (#20799)

* Add default config component

* Add default_config to default config

* Fix comments

homeassistant/components/default_config/__init__.py

@@ -0,0 +1,23 @@
+"""Component providing default configuration for new users."""
+
+DOMAIN = 'default_config'
+DEPENDENCIES = (
+    'automation',
+    'cloud',
+    'config',
+    'conversation',
+    'discovery',
+    'frontend',
+    'history',
+    'logbook',
+    'map',
+    'script',
+    'sun',
+    'system_health',
+    'updater',
+)
+
+
+async def async_setup(hass, config):
+    """Initialize default configuration."""
+    return True

homeassistant/components/discovery/__init__.py

@@ -105,7 +105,7 @@ CONF_IGNORE = 'ignore'
 CONF_ENABLE = 'enable'
 
 CONFIG_SCHEMA = vol.Schema({
-    vol.Required(DOMAIN): vol.Schema({
+    vol.Optional(DOMAIN): vol.Schema({
         vol.Optional(CONF_IGNORE, default=[]):
             vol.All(cv.ensure_list, [
                 vol.In(list(CONFIG_ENTRY_HANDLERS) + list(SERVICE_HANDLERS))]),
@@ -126,11 +126,15 @@ async def async_setup(hass, config):
     # Disable zeroconf logging, it spams
     logging.getLogger('zeroconf').setLevel(logging.CRITICAL)
 
-    # Platforms ignore by config
+    if DOMAIN in config:
-    ignored_platforms = config[DOMAIN][CONF_IGNORE]
+        # Platforms ignore by config
+        ignored_platforms = config[DOMAIN][CONF_IGNORE]
 
-    # Optional platforms enabled by config
+        # Optional platforms enabled by config
-    enabled_platforms = config[DOMAIN][CONF_ENABLE]
+        enabled_platforms = config[DOMAIN][CONF_ENABLE]
+    else:
+        ignored_platforms = []
+        enabled_platforms = []
 
     async def new_service_found(service, info):
         """Handle a new service if one is found."""

homeassistant/components/script/__init__.py

@@ -124,7 +124,7 @@ async def _async_process_config(hass, config, component):
 
     scripts = []
 
-    for object_id, cfg in config[DOMAIN].items():
+    for object_id, cfg in config.get(DOMAIN, {}).items():
         alias = cfg.get(CONF_ALIAS, object_id)
         script = ScriptEntity(hass, object_id, alias, cfg[CONF_SEQUENCE])
         scripts.append(script)

homeassistant/config.py

@@ -65,49 +65,16 @@ DEFAULT_CORE_CONFIG = (
     (CONF_CUSTOMIZE, '!include customize.yaml', None, 'Customization file'),
 )  # type: Tuple[Tuple[str, Any, Any, Optional[str]], ...]
 DEFAULT_CONFIG = """
-# Show links to resources in log and frontend
+# Configure a default setup of Home Assistant (frontend, api, etc)
+default_config:
+
+# Show the introduction message on startup.
 introduction:
 
-# Enables the frontend
-frontend:
-
-# Enables configuration UI
-config:
-
 # Uncomment this if you are using SSL/TLS, running in Docker container, etc.
 # http:
 #   base_url: example.duckdns.org:8123
 
-# Checks for available updates
-# Note: This component will send some information about your system to
-# the developers to assist with development of Home Assistant.
-# For more information, please see:
-# https://home-assistant.io/blog/2016/10/25/explaining-the-updater/
-updater:
-  # Optional, allows Home Assistant developers to focus on popular components.
-  # include_used_components: true
-
-# Discover some devices automatically
-discovery:
-
-# Allows you to issue voice commands from the frontend in enabled browsers
-conversation:
-
-# Enables support for tracking state changes over time
-history:
-
-# View all events in a logbook
-logbook:
-
-# Enables a map showing the location of tracked devices
-map:
-
-# Track the sun
-sun:
-
-# Allow diagnosing system problems
-system_health:
-
 # Sensors
 sensor:
   # Weather prediction
@@ -117,9 +84,6 @@ sensor:
 tts:
   - platform: google
 
-# Cloud
-cloud:
-
 group: !include groups.yaml
 automation: !include automations.yaml
 script: !include scripts.yaml

homeassistant/setup.py

@@ -63,7 +63,7 @@ async def _async_process_dependencies(
     blacklisted = [dep for dep in dependencies
                    if dep in loader.DEPENDENCY_BLACKLIST]
 
-    if blacklisted:
+    if blacklisted and name != 'default_config':
         _LOGGER.error("Unable to set up dependencies of %s: "
                       "found blacklisted dependencies: %s",
                       name, ', '.join(blacklisted))

tests/components/default_config/__init__.py

@@ -0,0 +1 @@
+"""Tests for the default config component."""

tests/components/default_config/test_init.py

@@ -0,0 +1,27 @@
+"""Test the default_config init."""
+from unittest.mock import patch
+
+from homeassistant.setup import async_setup_component
+
+import pytest
+
+from tests.common import MockDependency
+
+
+@pytest.fixture(autouse=True)
+def netdisco_mock():
+    """Mock netdisco."""
+    with MockDependency('netdisco', 'discovery'):
+        yield
+
+
+@pytest.fixture(autouse=True)
+def recorder_url_mock():
+    """Mock recorder url."""
+    with patch('homeassistant.components.recorder.DEFAULT_URL', 'sqlite://'):
+        yield
+
+
+async def test_setup(hass):
+    """Test setup."""
+    assert await async_setup_component(hass, 'default_config', {})