class Gem::RequestSet::GemDependencyAPI

def gem_platforms(name, options) # :nodoc:
  platform_names = Array(options.delete(:platform))
  platform_names.concat Array(options.delete(:platforms))
  platform_names.concat @current_platforms if @current_platforms
  return true if platform_names.empty?
  platform_names.any? do |platform_name|
    raise ArgumentError, "unknown platform #{platform_name.inspect}" unless
      platform = PLATFORM_MAP[platform_name]
    next false unless Gem::Platform.match_gem? platform, name
    if engines = ENGINE_MAP[platform_name]
      next false unless engines.include? Gem.ruby_engine
    end
    case WINDOWS[platform_name]
    when :only then
      next false unless Gem.win_platform?
    when :never then
      next false if Gem.win_platform?
    end
    VERSION_MAP[platform_name].satisfied_by? Gem.ruby_version
  end
end