export type SupportedImportEncoding = "utf8" | "sjis";
export declare const openFsStreamWithEncode: (filePath: string, encoding?: SupportedImportEncoding) => NodeJS.ReadableStream;
export declare const readFile: (filePath: string, encoding?: SupportedImportEncoding) => Promise<{
    content: string;
    format: string;
}>;
export declare const extractFileFormat: (filepath: string) => string;
/**
 * Check if the given path is a file.
 * Wrapping fs.stat() to reduce error handling code.
 * @param filePath
 */
export declare const isFile: (filePath: string) => Promise<boolean>;
/**
 * Check if the given path is a directory.
 * Wrapping fs.stat() to reduce error handling code.
 * @param dirPath
 */
export declare const isDirectory: (dirPath: string) => Promise<boolean>;