Gem::Source#content_addressable_metadata

# File tmp/rubies/ruby-4.1.0-preview1/lib/rubygems/source.rb, line 407
def content_addressable_metadata(name, rows)
  wanted_rows = rows.map do |row|
    ContentAddressableInfo.new(row[2], row[3], nil, nil)
  end

  available_rows = compact_index_info_rows(name).filter_map do |info_row|
    version = info_row[Gem::CompactIndexClient::INFO_VERSION]
    suffix = info_row[Gem::CompactIndexClient::INFO_SUFFIX]

    requirements = compact_index_requirements(info_row)
    platform = required_platform_from(requirements[:platform])
    next unless platform
    next unless requirements[:ruby]

    ruby_abi = Gem::ContentAddress.ruby_abi_for(Gem::Requirement.new(requirements[:ruby]))
    ContentAddressableInfo.new(version, suffix, ruby_abi, platform)
  end

  available_rows & wanted_rows
end