import { Options } from "execa";
import { Context, ContextLike, InternalOptionsContext } from "./context.js";
import { Command, Exec, Line, OutputLine } from "./exec.js";
type BaseTask = Readonly<{
    title: Line;
}>;
type SkipResult = boolean | string | Promise<boolean | string>;
type SkippableTask<C> = Readonly<{
    skip?: (context: Context<C>) => SkipResult;
}>;
type TaggedTask = Readonly<{
    tags?: readonly Line[];
}>;
type BaseLeafTask<C> = BaseTask & SkippableTask<C> & TaggedTask;
type CommandGetter<C> = (context: Context<C>) => Command;
type OptionsGetter<C> = (context: Context<C>) => Options;
type CommandProperties<C> = Readonly<{
    command: Command | CommandGetter<C>;
    options?: Options | OptionsGetter<C>;
}>;
type CommandTask<C> = BaseLeafTask<C> & CommandProperties<C>;
type RunnableTask<C> = Readonly<{
    run: (payload: Readonly<{
        context: Context<C>;
        exec: Exec;
        outputLine: OutputLine;
    }>) => Line | void | Promise<Line | void>;
}>;
type RegularTask<C> = BaseLeafTask<C> & RunnableTask<C>;
type LeafTask<C> = CommandTask<C> | RegularTask<C>;
type IntersectableContext<C> = C extends ContextLike<any> ? C : unknown;
type NestedChildrenMarker = false;
type ParentTask<C, A> = BaseTask & Readonly<{
    rollback?: RunnableTask<IntersectableContext<C>>["run"];
}> & SkippableTask<IntersectableContext<C>> & (A extends ContextLike ? Readonly<{
    addContext: (payload: Readonly<{
        /**
         * Secrets will be redacted in displayed command strings.
         */
        addSecret: (secret: string) => void;
        context: Context<IntersectableContext<C>>;
        exec: Exec;
    }>) => A | Promise<A>;
}> : unknown) & Readonly<{
    children: A extends NestedChildrenMarker ? any : ReadonlyArray<Task<IntersectableContext<C> & IntersectableContext<A>, NestedChildrenMarker>>;
    concurrent?: boolean | number;
}>;
export type Task<C = void, A = void> = LeafTask<C> | ParentTask<C, A>;
type FlatTask = Readonly<{
    parentTitle?: string;
}> & (TaggedTask | Readonly<{
    children: readonly string[];
}>);
type MutableFlatTasks = Record<string, FlatTask>;
export type FlatTasks = Readonly<MutableFlatTasks>;
export declare const buildFlatTasks: (task: Task<any>, flatTasks?: MutableFlatTasks, parentTitle?: string) => FlatTasks;
export declare const runTask: <C>(task: Task<C, void>, context: Readonly<{
    concurrency: number;
}> & Readonly<C> & Readonly<{
    dryRun: boolean;
    from: string | undefined;
    only: readonly string[];
    skip: readonly string[];
    tag: readonly string[];
    until: string | undefined;
}>, flatTasks: FlatTasks) => Promise<void>;
export {};
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