export declare class ProjectState {
    /**
     * This will be resolved or rejected once all the tasks associated with this
     * project finish.
     */
    promise: Promise<void>;
    /**
     * Run this to mark the project as successfully finished.
     */
    resolve: () => void;
    /**
     * Run this to mark the project as failed.
     */
    reject: (reason: Error) => void;
    /**
     * Provide information about current state of the project.
     */
    stage: string;
    constructor();
}
/**
 * Output formatted error message to stderr.
 * @param title - Some explanatory text as to what's going on.
 * @param details - The error or some other message as to what went wrong.
 */
export declare function logError(title: string, details?: unknown): void;
/**
 * @param title
 * @param details
 */
export declare function logInfo(title: string, details?: string): void;
/**
 * @param cwd
 * @param failCommand
 * @param error
 */
export declare function execFail(cwd: string, failCommand: string | null | undefined, error: Error | string): void;
export type Spawn = (options: SpawnOrTrhowArgs) => Promise<void>;
export interface SpawnOrTrhowArgs {
    cmd: readonly string[];
    cwd: string;
    failCommand?: string;
}
/**
 * @param logDir
 * @param getState
 */
export declare function createSpawner(logDir: string, getState: () => string[]): Spawn;
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