def _load_order_component(
hass, # type: HomeAssistant
comp_name: str,
load_order: OrderedSet,
loading: Set) -> OrderedSet:
"""Recursive function to get load order of components.
Async friendly.
"""
component = get_component(hass, comp_name)
# If None it does not exist, error already thrown by get_component.
if component is None:
return OrderedSet()
loading.add(comp_name)
for dependency in getattr(component, 'DEPENDENCIES', []):
# Check not already loaded
if dependency in load_order:
continue
# If we are already loading it, we have a circular dependency.
if dependency in loading:
_LOGGER.error("Circular dependency detected: %s -> %s", comp_name,
dependency)
return OrderedSet()
dep_load_order = _load_order_component(hass, dependency, load_order,
loading)
# length == 0 means error loading dependency or children
if not dep_load_order:
_LOGGER.error("Error loading %s dependency: %s", comp_name,
dependency)
return OrderedSet()
load_order.update(dep_load_order)
load_order.add(comp_name)
loading.remove(comp_name)
return load_order
def _load_order_component(hass, # type: HomeAssistant
comp_name: str, load_order: OrderedSet,
loading: Set) -> OrderedSet:
"""Recursive function to get load order of components.
Async friendly.
"""
component = get_component(hass, comp_name)
# If None it does not exist, error already thrown by get_component.
if component is None:
return OrderedSet()
loading.add(comp_name)
for dependency in getattr(component, 'DEPENDENCIES', []):
# Check not already loaded
if dependency in load_order:
continue
# If we are already loading it, we have a circular dependency.
if dependency in loading:
_LOGGER.error("Circular dependency detected: %s -> %s",
comp_name, dependency)
return OrderedSet()
dep_load_order = _load_order_component(
hass, dependency, load_order, loading)
# length == 0 means error loading dependency or children
if not dep_load_order:
_LOGGER.error("Error loading %s dependency: %s",
comp_name, dependency)
return OrderedSet()
load_order.update(dep_load_order)
load_order.add(comp_name)
loading.remove(comp_name)
return load_order
