class Gem::Commands::ContentsCommand

def initialize
  super 'contents', 'Display the contents of the installed gems',
        :specdirs => [], :lib_only => false, :prefix => true
  add_version_option
  add_option(      '--all',
             "Contents for all gems") do |all, options|
    options[:all] = all
  end
  add_option('-s', '--spec-dir a,b,c', Array,
             "Search for gems under specific paths") do |spec_dirs, options|
    options[:specdirs] = spec_dirs
  end
  add_option('-l', '--[no-]lib-only',
             "Only return files in the Gem's lib_dirs") do |lib_only, options|
    options[:lib_only] = lib_only
  end
  add_option(      '--[no-]prefix',
             "Don't include installed path prefix") do |prefix, options|
    options[:prefix] = prefix
  end
end