Method GetFileInfo

cpp/src/arrow/filesystem/gcsfs.cc:342–368

  const GcsOptions& options() const { return options_; }

  Result<FileInfo> GetFileInfo(const GcsPath& path) {
    if (path.object.empty()) {
      auto meta = client_.GetBucketMetadata(path.bucket);
      return GetFileInfoBucket(path, std::move(meta).status());
    }
    auto meta = client_.GetObjectMetadata(path.bucket, path.object);
    Result<FileInfo> info = GetFileInfoObject(path, meta);
    if (!info.ok() || info->type() != FileType::NotFound) {
      return info;
    }
    // Not found case.  It could be this was written to GCS with a different
    // "Directory" convention, so if there is at least one object that
    // matches the prefix we assume it is a directory.
    std::string canonical = internal::EnsureTrailingSlash(path.object);
    auto list_result = client_.ListObjects(path.bucket, gcs::Prefix(canonical));

    for (auto&& object_metadata : list_result) {
      if (!object_metadata) {
        continue;
      }
      // If there is at least one valid result, it indicates this is a
      // directory (at least one object exists that starts with "path/")
      return FileInfo(path.full_path, FileType::Directory);
    }
    // Return the original not-found info if there was no valid result.
    return info;
  }

  Result<FileInfoVector> GetFileInfo(const FileSelector& select) {
    ARROW_ASSIGN_OR_RAISE(auto p, GcsPath::FromString(select.base_dir));