class Gem::Commands::CleanupCommand

def clean_gems
  get_primary_gems
  get_candidate_gems
  get_gems_to_cleanup
  @full = Gem::DependencyList.from_specs
  deplist = Gem::DependencyList.new
  @gems_to_cleanup.each {|spec| deplist.add spec }
  deps = deplist.strongly_connected_components.flatten
  deps.reverse_each do |spec|
    uninstall_dep spec
  end
end