Function parse_prefetch_config

mycli/schema_prefetcher.py:32–48

Parse the ``prefetch_schemas_mode`` / ``prefetch_schemas_list`` options. Returns ``None`` when every accessible schema should be prefetched (``always``), an empty list when prefetching is disabled (``never``), or ``schema_list`` when the mode is ``listed``. Unknown modes fall back t

(mode: str, schema_list: list[str])

def parse_prefetch_config(mode: str, schema_list: list[str]) -> list[str] | None:
    """Parse the ``prefetch_schemas_mode`` / ``prefetch_schemas_list`` options.

    Returns ``None`` when every accessible schema should be prefetched
    (``always``), an empty list when prefetching is disabled
    (``never``), or ``schema_list`` when the mode is ``listed``.
    Unknown modes fall back to ``always``.
    """
    try:
        parsed = PrefetchMode(mode.strip().lower())
    except ValueError:
        return None
    if parsed is PrefetchMode.NEVER:
        return []
    if parsed is PrefetchMode.LISTED:
        return schema_list
    return None


class SchemaPrefetcher: