Function expand_dsn_alias_env_var

mycli/cli_runner.py:30–42

(value: str | None, alias_name: str)

def expand_dsn_alias_env_var(value: str | None, alias_name: str) -> str | None:
    if value is None:
        return None

    match = ENV_VAR_PATTERN.fullmatch(value)
    if not match:
        return value

    var_name = match.group(1)
    try:
        return os.environ[var_name]
    except KeyError as exc:
        raise DsnAliasEnvVarError(f'Environment variable {var_name} referenced by DSN alias {alias_name} is not set.') from exc


def split_dsn_netloc(netloc: str) -> tuple[str | None, str | None, str | None, str | None]: