message: Better logging in when iterating files.
diff: @@ -127,14 +127,15 @@ static void GetFilesInFolderHelper(
  const std::function<void(const std::string&)>& handler) {
  tinydir_dir dir;
  if (tinydir_open(&dir, folder.c_str()) == -1) {
  - // perror("Error opening file");
  + LOG_S(WARNING) << "Unable to open directory " << folder;
  goto bail;
  }
  while (dir.has_next) {
  tinydir_file file;
  if (tinydir_readfile(&dir, &file) == -1) {
  - // perror("Error getting file");
  + LOG_S(WARNING) << "Unable to read file " << file.name
  + << " when reading directory " << folder;
  goto bail;
  }
  @@ -159,7 +160,8 @@ static void GetFilesInFolderHelper(
  }
  if (tinydir_next(&dir) == -1) {
  - perror("Error getting next file");
  + LOG_S(WARNING) << "Unable to fetch next file when reading directory "
  + << folder;
  goto bail;
  }
  }
  