class Gem::Resolver::IndexSet

def find_all(req)
  res = []
  return res unless @remote
  name = req.dependency.name
  @all[name].each do |uri, n|
    if req.match? n, @prerelease
      res << Gem::Resolver::IndexSpecification.new(
        self, n.name, n.version, uri, n.platform)
    end
  end
  res
end

def initialize(source = nil) # :nodoc:
  super()
  @f =
    if source
      sources = Gem::SourceList.from [source]
      Gem::SpecFetcher.new sources
    else
      Gem::SpecFetcher.fetcher
    end
  @all = Hash.new {|h,k| h[k] = [] }
  list, errors = @f.available_specs :complete
  @errors.concat errors
  list.each do |uri, specs|
    specs.each do |n|
      @all[n.name] << [uri, n]
    end
  end
  @specs = {}
end

def pretty_print(q) # :nodoc:
  q.group 2, '[IndexSet', ']' do
    q.breakable
    q.text 'sources:'
    q.breakable
    q.pp @f.sources
    q.breakable
    q.text 'specs:'
    q.breakable
    names = @all.values.map do |tuples|
      tuples.map do |_, tuple|
        tuple.full_name
      end
    end.flatten
    q.seplist names do |name|
      q.text name
    end
  end
end