def get_first_matching_setting()

in kinto-remote-settings/src/kinto_remote_settings/signer/utils.py [0:0]

• 12 lines of code
• 5 McCabe index (conditional complexity)

def get_first_matching_setting(setting_name, settings, prefixes, default=None):
    """Helper to look up the `setting_name` key in the provided `settings`, with
    different `prefixes`. The first encountered value is returned, and if none
    is found, `default` is returned.
    """
    for prefix in prefixes:
        prefixed_setting_name = prefix + setting_name

        # Prefix `setting_name` with global «settings prefix» to lookup env vars.
        # It is forced to `kinto.` in Kinto main(), and allows to read
        # `signer.resources` from the `KINTO_SIGNER_RESOURCES` env var.
        # https://github.com/Kinto/kinto/blob/9c322f2adc/kinto/__init__.py#L48-L49
        full_prefixed_setting = (
            settings["settings_prefix"] + f".{prefixed_setting_name}"
        )
        from_env = read_env(full_prefixed_setting, None)
        if from_env is not None:
            return from_env

        if prefixed_setting_name in settings:
            return settings[prefixed_setting_name]

    return default