execute

# File lib/rubygems/commands/check_command.rb, line 27
  def execute
    if options[:alien]
      say "Performing the 'alien' operation"
      say
      gems = get_all_gem_names rescue []
      Gem::Validator.new.alien(gems).sort.each do |key, val|
        unless val.empty? then
          say "#{key} has #{val.size} problems"
          val.each do |error_entry|
            say "  #{error_entry.path}:"
            say "    #{error_entry.problem}"
          end
        else
          say "#{key} is error-free" if Gem.configuration.verbose
        end
        say
      end
    end

    if options[:verify]
      gem_name = options[:verify]
      unless gem_name
        alert_error "Must specify a .gem file with --verify NAME"
        return
      end
      unless File.exist?(gem_name)
        alert_error "Unknown file: #{gem_name}."
        return
      end
      say "Verifying gem: '#{gem_name}'"
      begin
        Gem::Validator.new.verify_gem_file(gem_name)
      rescue Exception
        alert_error "#{gem_name} is invalid."
      end
    end
  end