import { Context, FxError, LogProvider, Result } from "@microsoft/teamsfx-api";
import { DependencyChecker } from "./dependencyChecker";
export declare class YoChecker implements DependencyChecker {
    private readonly _logger;
    constructor(logger: LogProvider);
    ensureDependency(ctx: Context, targetVersion: string): Promise<Result<boolean, FxError>>;
    findLocalInstalledVersion(): Promise<string | undefined>;
    isLatestInstalled(): Promise<boolean>;
    install(targetVersion: string): Promise<void>;
    getBinFolders(): string[];
    findGloballyInstalledVersion(timeoutInSeconds?: number): Promise<string | undefined>;
    findLatestVersion(timeoutInSeconds: number): Promise<string | undefined>;
    private validate;
    private getDefaultInstallPath;
    private getSentinelPath;
    private queryVersion;
    private cleanup;
    private installYo;
}
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