import * as ts from 'typescript';
import { AngularCompilerPluginOptions } from '@ngtools/webpack';
export declare type BeforeRunHandler = (resourceCompiler: {
    get(filename: string): Promise<string>;
}) => void | Promise<void>;
export declare type ResourcePathTransformer = (path: string) => string;
export declare type ResourceTransformer = (path: string, source: string) => string | Promise<string>;
export declare type ReadFileTransformer = {
    predicate: RegExp | ((path: string) => boolean);
    transform: (path: string, source: string) => string;
};
export interface NgcWebpackPluginOptions extends AngularCompilerPluginOptions {
    /**
     * An alias for `AngularCompilerPluginOptions.skipCodeGeneration` simply to make it more readable.
     * If `skipCodeGeneration` is set, this value is ignored.
     * If this value is not set, the default value is taken from `skipCodeGeneration`
     * (which means AOT = true)
     */
    AOT?: boolean;
    /**
     * A hook that invokes before the plugin start the compilation process (compiler 'run' event).
     * ( resourceCompiler: { get(filename: string): Promise<string> }) => Promise<void>;
     *
     * The hook accepts a resource compiler which able (using webpack) to perform compilation on
     * files using webpack's loader chain and return the final content.
     * @param resourceCompiler
     */
    beforeRun?: BeforeRunHandler;
    /**
     * Transform a source file (ts, js, metadata.json, summery.json).
     * If `predicate` is true invokes `transform`
     *
     * > Run's in both AOT and JIT mode on all files, internal and external as well as resources.
     *
     *
     *  - Do not apply changes to resource files using this hook when in AOT mode, it will not commit.
     *  - Do not apply changes to resource files in watch mode.
     *
     * Note that source code transformation is sync, you can't return a promise (contrary to `resourcePathTransformer`).
     * This means that you can not use webpack compilation (or any other async process) to alter source code context.
     * If you know the files you need to transform, use the `beforeRun` hook.
     */
    readFileTransformer?: ReadFileTransformer;
    /**
     * Transform the path of a resource (html, css, etc)
     * (path: string) => string;
     *
     * > Run's in AOT mode only and on metadata resource files (templateUrl, styleUrls)
     */
    resourcePathTransformer?: ResourcePathTransformer;
    /**
     * Transform a resource (html, css etc)
     * (path: string, source: string) => string | Promise<string>;
     *
     * > Run's in AOT mode only and on metadata resource files (templateUrl, styleUrls)
     */
    resourceTransformer?: ResourceTransformer;
    /**
     * Add custom TypeScript transformers to the compilation process.
     *
     * Transformers are applied after the transforms added by `@angular/compiler-cli` and
     * `@ngtools/webpack`.
     *
     * > `after` transformers are currently not supported.
     */
    tsTransformers?: ts.CustomTransformers;
}