import { DiagnosticHandler } from "../core/diagnostics.js";
import { CompilerHost, DiagnosticTarget, NoTarget, SourceFile, SystemHost } from "../core/types.js";
export interface FileHandlingOptions {
    allowFileNotFound?: boolean;
    diagnosticTarget?: DiagnosticTarget | typeof NoTarget;
    jsDiagnosticTarget?: DiagnosticTarget;
}
export declare function doIO<T>(action: (path: string) => Promise<T>, path: string, reportDiagnostic: DiagnosticHandler, options?: FileHandlingOptions): Promise<T | undefined>;
export declare function loadFile<T>(host: SystemHost, path: string, load: (contents: string) => T, reportDiagnostic: DiagnosticHandler, options?: FileHandlingOptions): Promise<[T | undefined, SourceFile]>;
/**
 * Look for the project root by looking up until a `package.json` is found.
 * @param path Path to start looking
 * @param lookIn
 */
export declare function findProjectRoot(statFn: CompilerHost["stat"], path: string): Promise<string | undefined>;
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