Function findProjLibInStandartPathsRecursive

src/proj_loader.cpp:195–234

Search for the PROJ library within the standard installation directories by recursively traversing them.

/// Search for the PROJ library within the standard installation directories by recursively traversing them.
static std::string findProjLibInStandartPathsRecursive(std::set<std::filesystem::path>& searchedPaths) {
  const char* homeDir = nullptr;
  std::vector<std::filesystem::path> pathsToCheck;

#ifdef _WIN32
  // Windows-Standardpfade
  pathsToCheck.push_back("C:\\Program Files\\");
  pathsToCheck.push_back("C:\\Program Files (x86)\\");

  const char* userProfile = getenv("USERPROFILE");
  if (userProfile) {
    pathsToCheck.push_back(std::filesystem::path(userProfile) / "AppData/Local/Programs");
  }
#else
  // Linux/macOS-Standardpfade
  const std::string systemLibPaths[] = {
      "/usr/lib/x86_64-linux-gnu/", "/usr/lib/", "/usr/bin/", "/usr/local/lib/", "/usr/local/bin/", "/opt/", "/usr/share/", "/lib/x86_64-linux-gnu/"};
  homeDir = getHomeDirectory();

  for (const auto& p : systemLibPaths) pathsToCheck.push_back(p);
  if (homeDir) pathsToCheck.push_back(std::filesystem::path(homeDir) / ".local/lib");
#endif
  // 1. Recursive fallback
  for (const auto& basePath : pathsToCheck) {
    std::string logEntry = basePath.string() + " (searching this path recursively)";
    searchedPaths.insert(logEntry);
    try {
      for (const auto& entry : std::filesystem::recursive_directory_iterator(basePath)) {
        if (std::filesystem::exists(entry) && entry.is_directory()) {
          // searchedPaths.insert(entry.path());
          const std::string resultPath = findLatestProjLibraryPath(entry.path().string());
          if (!resultPath.empty()) return resultPath;
        }
      }
    } catch (const std::filesystem::filesystem_error&) {
      continue;
    }
  }
  return "";
}

/// Search for the PROJ library within the standard installation directories.
static std::string findProjLibInStandartPaths(std::set<std::filesystem::path>& searchedPaths) {