import { CrendentialForAWS } from '../environ';
import { RuntimeConfigAwsCredentialIdentityProvider } from '@aws-sdk/types/dist-types/identity/AwsCredentialIdentity';
import { LemonEngine } from '../engine/types';
/**
 * Check if the current environment is AWS Lambda
 * @returns {boolean} - true if running in AWS Lambda environment
 */
export declare const isLambda: () => boolean;
/** returns only defined */
export declare const onlyDefined: <T extends object>(N: T, $def?: T) => T;
/**
 * load json in sync.
 */
export declare const loadJsonSync: <T extends object = any>(name: string, def?: {}) => T;
/**
 * load yml data via './data/<file>.yml'
 */
export declare const loadDataYml: <T extends object = any>(file: string, folder?: string) => T;
/**
 * dynamic loading credentials by profile. (search PROFILE -> NAME)
 *
 * @returns {Promise<CrendentialForAWS>} - AWS credentials
 */
export declare const asyncCredentials: (profile?: string) => Promise<CrendentialForAWS>;
/**
 * type: `AwsConfigParams`
 * - parameters for AWS config.
 * - used for `awsConfig()`
 */
export interface AwsConfigParams {
    /** AWS region */
    region?: string;
    /** AWS profile */
    profile?: string;
    /** AWS credentials provider */
    credentials?: RuntimeConfigAwsCredentialIdentityProvider;
}
/**
 * load config for aws sdk
 * - if `profile` is not defined, use `AWS_PROFILE` or `default`
 * - if `region` is not defined, use `AWS_REGION` or `ap-northeast-2`
 *
 * ```
 * # run with default profile
 * $ npm run test:watch
 *
 * # run with `lemon` profile
 * #npm run test:watch.lemon
 */
export declare const awsConfig: <T extends AwsConfigParams>($engine: LemonEngine, params?: string | T | (() => string)) => T & {
    credentials?: RuntimeConfigAwsCredentialIdentityProvider;
};