export type WriteFileAtomicOptions = {
    readonly encoding?: BufferEncoding;
};
export type FileChangeToken = {
    readonly mtimeMs: number;
    readonly size: number;
};
export type TextFileSnapshot = {
    readonly path: string;
    readonly text: string;
    readonly token: FileChangeToken;
};
export declare class AtomicWriteConflictError extends Error {
    readonly targetPath: string;
    constructor(targetPath: string);
}
export declare class PrivateFilePermissionError extends Error {
    readonly targetPath: string;
    readonly expectedMode: number;
    readonly actualMode: number;
    constructor(targetPath: string, expectedMode: number, actualMode: number);
}
export declare function writeFileAtomic(targetPath: string, data: string, options?: WriteFileAtomicOptions): void;
export declare function writePrivateFileAtomic(targetPath: string, data: string, options?: WriteFileAtomicOptions): void;
export declare function ensurePrivateDirectory(targetPath: string): void;
export declare function supportsPosixFileModes(platform?: NodeJS.Platform): boolean;
export declare function readTextFileSnapshot(targetPath: string, options?: WriteFileAtomicOptions): TextFileSnapshot;
export declare function writeFileAtomicIfUnchanged(snapshot: TextFileSnapshot, data: string, options?: WriteFileAtomicOptions): void;
export declare function writeFileAtomicIfTokenUnchanged(targetPath: string, expectedToken: FileChangeToken | null, data: string, options?: WriteFileAtomicOptions): FileChangeToken;
export declare function fileChangeToken(targetPath: string): FileChangeToken | null;