class Gem::Commands::ContentsCommand

def initialize
  super "contents", "Display the contents of the installed gems",
        specdirs: [], lib_only: false, prefix: true,
        show_install_dir: false
  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
  add_option("--[no-]show-install-dir",
             "Show only the gem install dir") do |show, options|
    options[:show_install_dir] = show
  end
  @path_kind = nil
  @spec_dirs = nil
  @version   = nil
end