Gem::Source#load_compact_index_specs

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/source.rb, line 346
def load_compact_index_specs(type)
  return unless %w[http https].include?(uri.scheme)

  versions = compact_index_versions
  return if versions.nil? || versions.empty?

  tuples = []

  versions.each_value do |rows|
    gem_tuples = rows.filter_map do |row_name, version_string, suffix|
      next unless Gem::Version.correct?(version_string)

      version = Gem::Version.new(version_string)
      next if version.prerelease? != (type == :prerelease)

      suffix ||= "ruby"
      content_address = suffix if Gem::ContentAddress.match?(suffix)

      Gem::NameTuple.new(row_name, version, suffix, content_address: content_address)
    end

    gem_tuples = max_versions_by_platform(gem_tuples) if type == :latest

    tuples.concat(gem_tuples)
  end

  tuples
end