Method load_file

plugins/experimental/txn_box/plugin/src/Config.cc:684–727

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/* ------------------------------------------------------------------------------------ */
Errata
Config::load_file(swoc::file::path const &cfg_path, TextView cfg_key, YamlCache *cache)
{
  if (auto spot = _cfg_files.find(cfg_path); spot != _cfg_files.end()) {
    if (spot->second.has_cfg_key(cfg_key)) {
      ts::DebugMsg(R"(Skipping "{}":{} - already loaded)", cfg_path, cfg_key);
      return {};
    } else {
      spot->second.add_cfg_key(cfg_key);
    }
  } else { // not found - put it in the table.
    auto [iter, flag] = _cfg_files.emplace(FileInfoMap::value_type{cfg_path, {}});
    iter->second.add_cfg_key(cfg_key);
  }

  YAML::Node root;
  // Try loading and parsing the file.
  if (cache) {
    if (auto cache_spot = cache->find(cfg_path); cache_spot != cache->end()) {
      root = cache_spot->second;
    }
  }

  if (root.IsNull()) {
    auto &&[yaml_node, yaml_errata]{yaml_load(cfg_path)};
    if (!yaml_errata.is_ok()) {
      yaml_errata.note(R"(While loading file "{}".)", cfg_path);
      return std::move(yaml_errata);
    }
    root = yaml_node;
    if (cache) {
      cache->emplace(cfg_path, root);
    }
  }

  // Process the YAML data.
  auto errata = this->parse_yaml(root, cfg_key);
  if (!errata.is_ok()) {
    errata.note(R"(While parsing key "{}" in configuration file "{}".)", cfg_key, cfg_path);
    return errata;
  }

  return {};
}
/* ------------------------------------------------------------------------------------ */
Errata
Config::load_file_glob(TextView pattern, swoc::TextView cfg_key, YamlCache *cache)