class Gem::Commands::UninstallCommand

def execute
  check_version
  # Consider only gem specifications installed at `--install-dir`
  Gem::Specification.dirs = options[:install_dir] if options[:install_dir]
  if options[:all] && !options[:args].empty?
    uninstall_specific
  elsif options[:all]
    uninstall_all
  else
    uninstall_specific
  end
end