Method VersioningDatabase

source/game/StarVersioningDatabase.cpp:84–117

}

VersioningDatabase::VersioningDatabase() {
  auto assets = Root::singleton().assets();

  for (auto const& pair : assets->json("/versioning.config").iterateObject())
    m_currentVersions[pair.first] = pair.second.toUInt();

  for (auto const& scriptFile : assets->scan("/versioning/", ".lua")) {
    try {
      auto scriptParts = File::baseName(scriptFile).splitAny("_.");
      if (scriptParts.size() != 4)
        throw VersioningDatabaseException::format("Script file '{}' filename not of the form <identifier>_<fromversion>_<toversion>.lua", scriptFile);

      String identifier = scriptParts.at(0);
      VersionNumber fromVersion = lexicalCast<VersionNumber>(scriptParts.at(1));
      VersionNumber toVersion = lexicalCast<VersionNumber>(scriptParts.at(2));

      m_versionUpdateScripts[identifier.toLower()].append({scriptFile, fromVersion, toVersion});
    } catch (StarException const&) {
      throw VersioningDatabaseException::format("Error parsing version information from versioning script '{}'", scriptFile);
    }
  }

  // Sort each set of update scripts first by fromVersion, and then in
  // *reverse* order of toVersion.  This way, the first matching script for a
  // given fromVersion should take the json to the *furthest* toVersion.
  for (auto& pair : m_versionUpdateScripts) {
    pair.second.sort([](VersionUpdateScript const& lhs, VersionUpdateScript const& rhs) {
      if (lhs.fromVersion != rhs.fromVersion)
        return lhs.fromVersion < rhs.fromVersion;
      else
        return lhs.toVersion < rhs.toVersion;
    });
  }
}

VersionedJson VersioningDatabase::makeCurrentVersionedJson(String const& identifier, Json const& content) const {
  RecursiveMutexLocker locker(m_mutex);