/**
 * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS-IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { Context, Compression, maxSize } from './validation/Condition';
import { Report } from './log/report';
export interface CompressionItem {
    path: string;
    compression: Compression;
    maxSize: maxSize;
}
/**
 * Find all items to compress, and store them for future compression.
 * @param context
 * @param findDefaultSize
 */
export declare function findItemsToCompress(context: Context, findDefaultSize: boolean): Promise<Array<CompressionItem>>;
/**
 * Given a context, compress all Items within splitting work eagly per cpu core to achieve some concurrency.
 * @param context Finalized Valid Context from Configuration
 */
export default function compress(context: Context, toCompress: Array<CompressionItem>, report: typeof Report | null): Promise<boolean>;