/// <reference types="node" />
export declare const readFileData: (filePath: string) => Buffer;
export declare const readZipFileAsBuffer: (filePath: string) => Buffer;
export declare const compressBuildToZip: (dirPath: string) => Promise<string>;
export declare const verifyClientDirectory: (directoryPath: string) => void;
export declare const checkIfFileExists: (filePath: string) => boolean;
export declare const getFileExtension: (filePath: string) => string;
export declare const createTarGzArchive: (directoryPath: string, fileName?: string) => Promise<string>;
export declare const createGitignoreAndAppendConfigFileIfNeeded: (directoryPath: string, fileName?: string) => void;
/**
 * Detect if the project is yarn project with a build step
 * if so, we will need to abort the build process as
 * gcloud buildpacks does not support it yet
 * @param directoryPath the path where the project is located
 * @throws Error if the project is yarn project with a build step
 * @returns void
 **/
export declare const validateIfCanBuild: (directoryPath: string) => void;