export type GitStatusExecFn = (file: string, args: string[], cwd: string) => Promise<{
    stdout: string;
    stderr: string;
}>;
export interface GitStatusSamplerOptions {
    cwd: string | (() => string);
    exec?: GitStatusExecFn;
    prTtlMs?: number;
    branchTtlMs?: number;
    now?: () => number;
    timeoutMs?: number;
    onUpdate?: () => void;
}
export declare class GitStatusSampler {
    private readonly getCwd;
    private lastSampledCwd;
    private readonly exec;
    private readonly prTtlMs;
    private readonly branchTtlMs;
    private readonly now;
    private onUpdate;
    private branch;
    private pr;
    private prBranch;
    private prFetchedAt;
    private branchFetchedAt;
    private branchInFlight;
    private prInFlight;
    private disposed;
    private resetToken;
    constructor(opts: GitStatusSamplerOptions);
    setOnUpdate(cb: (() => void) | undefined): void;
    getBranch(): string | undefined;
    getPr(): number | undefined;
    refresh(opts?: {
        blockOnPr?: boolean;
    }): Promise<void>;
    reset(): void;
    dispose(): void;
    private updateBranch;
    private notify;
    private gitBranch;
    private maybeFetchPr;
}