import { ModuleMetadata } from '@nestjs/common/interfaces';
import { Type } from '@nestjs/common';
export interface ModuleAsyncOptions<T> extends Pick<ModuleMetadata, 'imports'> {
    useExisting?: Type<ModuleOptionsFactory<T>>;
    useClass?: Type<ModuleOptionsFactory<T>>;
    useFactory?: (...args: any[]) => Promise<T> | T;
    inject?: any[];
}
export interface ModuleOptionsFactory<T> {
    createOptions(): Promise<T> | T;
}
export declare class ModuleUtil {
    private static envFiles;
    private static currentEnv;
    static makeAsyncImportsAndProviders<T = any>(options: ModuleAsyncOptions<T>, optionsKey: string): {
        imports: any[];
        providers: any[];
    };
    static getEnvFiles(): string[];
    static getCurrentEnv(): Record<string, any>;
}