/** A {@link BuildFailure} represents an error _already logged_ in our build. */
export declare class BuildFailure extends Error {
    readonly errors?: readonly any[] | undefined;
    /** Construct a {@link BuildFailure} */
    constructor(message?: string | undefined, errors?: any[]);
    static fail(): BuildFailure;
    static withMessage(message: string): BuildFailure;
    static withErrors(errors: any[]): BuildFailure;
    static [Symbol.hasInstance](instance: any): boolean;
}
/** Await and assert that all specified promises were fulfilled */
export declare function assertPromises<T>(promises: (T | Promise<T>)[]): Promise<T[]>;
/** Asserts something as _truthy_ and fail the build if not */
export declare function assert(assertion: any, message: string): asserts assertion;
/** Fail a build with a message */
export declare function fail(message: string): never;