declare const checkpointLockBrand: unique symbol;
export interface DerivedCheckpointLock {
    readonly root: string;
    readonly [checkpointLockBrand]: true;
}
export type DerivedCheckpointDirectoryKind = "absent" | "directory" | "symlink" | "other";
export declare function derivedCheckpointDirectoryKind(wikiRoot: string): Promise<DerivedCheckpointDirectoryKind>;
export declare function withDerivedCheckpointLock<T>(wikiRoot: string, operation: (lock: DerivedCheckpointLock) => Promise<T>): Promise<T>;
export declare function usingDerivedCheckpointLock<T>(wikiRoot: string, existing: DerivedCheckpointLock | undefined, operation: () => Promise<T>): Promise<T>;
export {};
//# sourceMappingURL=checkpoint-lock.d.ts.map