walthowd/ha-constant-modifier

Custom component for Home Assistant to modify constants

ha-constant-modifier

This is a custom component for Home Assistant that can be used to modify, patch or overwrite constants in other components. Authored by @puddly

Installation

To install, place the constant_modifier in your Home Assistant configuration directory under the custom_components folder

Configuration

Add to configuration.yaml any constants you need to modify. For example

constant_modifier:
  homeassistant.components.websocket_api.http:
    MAX_PENDING_MSG: 4096
    PENDING_MSG_PEAK: 2048

  zhaquirks.xiaomi:
    MotionCluster.reset_s: 5

Note

This component was created to battle the issue of "Client exceeded max pending messages" when the websocket queue fills in Home Assistant. This seems to be an uncommon issue when using Node-RED and node-red-contrib-home-assistant-websocket in large installations.

ha-constant-modifier's Issues

Exception when trying to use with recent HA version like 2023.09

Seems the last change to this is quite old and it causes configuration load exceptions for the home assistant object since it has now mandatory arguments as described here:
https://developers.home-assistant.io/blog/2023/08/29/homeassistant-changed-signature?_highlight=homeassistant%28

With following changes I could get the ha-constant-modifier to work with HA 2023.10:
Updated imports:

from homeassistant.core import HomeAssistant
from homeassistant.config import load_yaml_config_file, YAML_CONFIG_FILE
from homeassistant.__main__ import get_arguments
from homeassistant.util.yaml import SECRET_YAML, Secrets, load_yaml

here is the updated def get_ha_config() to use the required config file parameter and the secrets parameter.
PS: From the code it appears that Secret is optional and defaults to Null, but since I use Secrets includes in my config I guess this must be specified as well when you want to duplicate the changed HA startup sequence

def get_ha_config():
    """
    Duplicate enough of the HA startup sequence to extract the config *really* early.
    """

    args = get_arguments()

    try:
        hass = HomeAssistant()  # pylint: disable=no-value-for-parameter
        hass.config.config_dir = os.path.abspath(os.path.join(os.getcwd(), args.config))
    except TypeError:
        hass = HomeAssistant(os.path.abspath(os.path.join(os.getcwd(), args.config)))  # pylint: disable=too-many-function-args

    return load_yaml_config_file(hass.config.path(YAML_CONFIG_FILE),Secrets(hass.config.path(hass.config.config_dir)))