class Bundler::Resolver

def search(dep)
  if base = @base[dep.name] and base.any?
    reqs = [dep.requirement.as_list, base.first.version.to_s].flatten.compact
    d = Gem::Dependency.new(base.first.name, *reqs)
  else
    d = dep.dep
  end
  index = @source_requirements[d.name] || @index
  results = index.search_for_all_platforms(d, @base[d.name])
  if results.any?
    version = results.first.version
    nested  = [[]]
    results.each do |spec|
      if spec.version != version
        nested << []
        version = spec.version
      end
      nested.last << spec
    end
    nested.map { |a| SpecGroup.new(a) }.select { |sg| sg.for?(dep.__platform) }
  else
    []
  end
end