/**
 * @license
 * Copyright 2021 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
import * as ts from 'typescript';
export interface LocaleTransformer {
    locale: string;
    localeTransformer: {
        type: 'program';
        factory: (program: ts.Program) => ts.TransformerFactory<ts.SourceFile>;
    };
}
/**
 * Return an array of locales with associated TypeScript transformer factories
 * suitable for passing to the `transformers.before` [0] option of
 * `@rollup/plugin-typescript`.
 *
 * Example:
 *
 *   const locales = localeTransformers()
 *   export default locales.map(({locale, localeTransformer}) => ({
 *     input: `src/index.ts`,
 *     plugins: [
 *       typescript({
 *         transformers: {
 *           before: [localeTransformer],
 *         },
 *       }),
 *       resolve(),
 *     ],
 *     output: {
 *       file: `bundled/${locale}/index.js`,
 *       format: 'es',
 *     },
 *   }));
 *
 * [0] https://github.com/rollup/plugins/tree/master/packages/typescript/#transformers
 */
export declare const localeTransformers: (configPath?: string) => Array<LocaleTransformer>;