private static _downloadFile()

in lib/common/VersionDownloader.ts [13:40]

• 27 lines of code
• 2 McCabe index (conditional complexity)

  private static _downloadFile(url: string, destination: string): Promise<string> {
    Logger.info(`Downloading ${url}.`);

    return new Promise((resolve, reject) => {
      let stream = request(url)
        .on('error', reject)
        .on('response', response => {
          if (response.statusCode === 200) {
            stream
              .pipe(zlib.createGunzip())
              .pipe(tar.extract(destination, {
                map: header => {
                  header.name = header.name.substring(header.name.indexOf('/'));
                  return header;
                }
              }))
              .on('finish', () => {
                resolve(destination);
                stream.destroy();
                Logger.info(`Downloaded ${url} successfully.`);
              });
          } else {
            reject(`Failed to download ${url}. Status code: ${response.statusCode}.`);
            stream.destroy();
          }
        });
    });
  }