export type Stage = 'prepare' | 'apply' | 'rollback';
export type StepStatus = 'pending' | 'running' | 'succeeded' | 'failed' | 'rolled-back';
export type FailurePolicy = 'stop-on-error' | 'continue-on-error';
export interface ProgressEvent {
    stage: Stage;
    stepId: string;
    status: StepStatus;
    error?: Error;
}
export type ProgressCallback = (event: ProgressEvent) => void;
export interface Step {
    readonly id: string;
    readonly description: string;
    run(): void;
    rollback?(): void;
    /** Dispose backups registered by this step after total success or clean rollback. */
    confirm?(): void;
}
export interface StagePlan {
    prepare: Step[];
    apply: Step[];
}
export interface StepResult {
    stepId: string;
    status: StepStatus;
    startedAt: Date;
    finishedAt?: Date;
    error?: Error;
}
export interface StageResult {
    stage: Stage;
    success: boolean;
    steps: StepResult[];
    error?: Error;
}
export interface PipelineResult {
    prepare: StageResult;
    apply: StageResult;
    rollback?: StageResult;
    error?: Error;
}
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