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/// <reference types="node" />
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { Observable } from 'rxjs';
import { Url } from 'url';
import { CollectionDescription, EngineHost, RuleFactory, SchematicDescription, Source, TaskExecutor, TypedSchematicContext } from '../src';
export declare type FallbackCollectionDescription = {
host: EngineHost<{}, {}>;
description: CollectionDescription<{}>;
};
export declare type FallbackSchematicDescription = {
description: SchematicDescription<{}, {}>;
};
export declare type FallbackContext = TypedSchematicContext<FallbackCollectionDescription, FallbackSchematicDescription>;
/**
* An EngineHost that support multiple hosts in a fallback configuration. If a host does not
* have a collection/schematics, use the following host before giving up.
*/
export declare class FallbackEngineHost implements EngineHost<{}, {}> {
private _hosts;
constructor();
addHost<CollectionT extends object, SchematicT extends object>(host: EngineHost<CollectionT, SchematicT>): void;
createCollectionDescription(name: string): CollectionDescription<FallbackCollectionDescription>;
createSchematicDescription(name: string, collection: CollectionDescription<FallbackCollectionDescription>): SchematicDescription<FallbackCollectionDescription, FallbackSchematicDescription> | null;
getSchematicRuleFactory<OptionT extends object>(schematic: SchematicDescription<FallbackCollectionDescription, FallbackSchematicDescription>, collection: CollectionDescription<FallbackCollectionDescription>): RuleFactory<OptionT>;
createSourceFromUrl(url: Url, context: FallbackContext): Source | null;
transformOptions<OptionT extends object, ResultT extends object>(schematic: SchematicDescription<FallbackCollectionDescription, FallbackSchematicDescription>, options: OptionT, context?: FallbackContext): Observable<ResultT>;
transformContext(context: FallbackContext): FallbackContext;
listSchematicNames(collection: CollectionDescription<FallbackCollectionDescription>): string[];
createTaskExecutor(name: string): Observable<TaskExecutor>;
hasTaskExecutor(name: string): boolean;
}