import { ConfigSettingsArg, EnvConfigSettings } from '../types';
/**
 * Returns full file path for file with base name and passed extension.  Returns null if file does not exist
 * @param rootDir Root directory to look for file
 * @param baseName base name (file name without extension) to match
 * @param extension file extension to check for
 */
export declare const getFileWithBaseNameAndExtension: (rootDir: string, baseName: string, extension: string | string[]) => string;
export declare const isEnvConfigSettings: <TSettings extends {} = {}>(val: TSettings | EnvConfigSettings<TSettings> | EnvConfigSettings<TSettings>[]) => boolean;
export declare const isBuildConfigSettingsBuilderPathOption: <T>(val: import("../types").ConfigSettingsPath | Partial<T> | EnvConfigSettings<T> | (() => import("../types").ConfigSettingsTypes<T>) | (() => Promise<import("../types").ConfigSettingsTypes<T>>) | ConfigSettingsArg<T>[]) => boolean;
export declare const toEnvConfigSettings: <TSettings extends {} = {}>(settings: TSettings | EnvConfigSettings<TSettings>) => EnvConfigSettings<TSettings>;