text: /*
   * Licensed to Elasticsearch B.V. under one or more contributor
   * license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright
   * ownership. Elasticsearch B.V. licenses this file to you 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 { CLIEngine } from 'eslint';
  
  /**
   * Filters a list of files to only include lintable files.
   *
   * @param  {ToolingLog} log
   * @param  {Array<File>} files
   * @return {Array<File>}
   */
  export function pickFilesToLint(log, files) {
    const cli = new CLIEngine();
  
    return files.filter(file => {
      if (!file.isJs() && !file.isTypescript()) {
        return;
      }
  
      const path = file.getRelativePath();
  
      if (cli.isPathIgnored(path)) {
        log.warning(`[eslint] %j ignored by .eslintignore`, file);
        return false;
      }
  
      log.debug('[eslint] linting %j', file);
      return true;
    });
  }
  