export interface LockfilePackage {
    lockPath: string;
    name: string;
    version?: string;
}
export interface ReadLockfileAtRefOptions {
    projectRoot: string;
    ref: string;
    lockfilePath: string;
}
export declare class LockfileReadError extends Error {
    constructor(message: string, cause?: unknown);
}
export declare class LockfileNotFoundAtRefError extends LockfileReadError {
    readonly ref: string;
    readonly lockfilePath: string;
    constructor(ref: string, lockfilePath: string, cause?: unknown);
}
export declare function findGitRoot(cwd: string): Promise<string>;
export declare function resolveGitRef(cwd: string, ref: string): Promise<string>;
export declare function readLockfileTextAtRef(options: ReadLockfileAtRefOptions): Promise<string>;
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