code: private void initializeRetireJsRepo(Settings settings, URL repoUrl) throws UpdateException {
          try {
              final File dataDir = settings.getDataDirectory();
              final File tmpDir = settings.getTempDirectory();
              boolean useProxy = false;
              if (null != settings.getString(Settings.KEYS.PROXY_SERVER)) {
                  useProxy = true;
                  LOGGER.debug("Using proxy");
              }
              LOGGER.debug("RetireJS Repo URL: {}", repoUrl.toExternalForm());
              final URLConnectionFactory factory = new URLConnectionFactory(settings);
              final HttpURLConnection conn = factory.createHttpURLConnection(repoUrl, useProxy);
              final String filename = repoUrl.getFile().substring(repoUrl.getFile().lastIndexOf("/") + 1, repoUrl.getFile().length());
              if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
                  final File tmpFile = new File(tmpDir, filename);
                  final File repoFile = new File(dataDir, filename);
                  try (InputStream inputStream = conn.getInputStream();
                          FileOutputStream outputStream = new FileOutputStream(tmpFile)) {
                      IOUtils.copy(inputStream, outputStream);
                  }
                  //using move fails if target and destination are on different disks which does happen (see #1394 and #1404)
                  Files.copy(tmpFile.toPath(), repoFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
                  if (!tmpFile.delete()) {
                      tmpFile.deleteOnExit();
                  }
              }
          } catch (IOException e) {
              throw new UpdateException("Failed to initialize the RetireJS repo", e);
          }
      }
docs: Initializes the local RetireJS repository
  
  @param settings a reference to the dependency-check settings
  @param repoUrl the URL to the RetireJS repo to use
  @throws UpdateException thrown if there is an exception during
  initialization