import { HandlerContext } from "@atomist/automation-client/lib/HandlerContext";
import { WritableLog } from "@atomist/automation-client/lib/util/child_process";
import { SdmGoalEvent } from "../../api/goal/SdmGoalEvent";
/**
 * Log abstraction for output of a specific activity. Not intended as a long-running log
 * but for a short-lived activity.
 * Not a technical log of this project but a log of meaningful activity
 * on behalf of users.
 */
export interface ProgressLog extends WritableLog {
    /**
     * Name. Should relate to the immediate activity we're logging.
     */
    readonly name: string;
    /**
     * Return the url of the log if it is persisted
     */
    readonly url?: string;
    flush(): Promise<void>;
    close(): Promise<void>;
    /**
     * Is this logger available at this point in time?
     * E.g. if it's backed by a service, is that service up?
     */
    isAvailable(): Promise<boolean>;
    /** Function that appends to the log. */
    write(log: string, ...args: any[]): void;
}
/**
 * Function to create a ProgressLog for a given goal execution
 */
export declare type ProgressLogFactory = (context: HandlerContext, sdmGoal: SdmGoalEvent) => Promise<ProgressLog>;
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