execute

# File lib/rubygems/commands/help_command.rb, line 293
  def execute
    arg = options[:args][0]

    _, help = SUBCOMMANDS.find do |command,|
      begins? command, arg
    end

    if help then
      if Symbol === help then
        send help
      else
        say help
      end
      return
    end

    if options[:help] then
      show_help

    elsif arg then
      show_command_help arg

    else
      say Gem::Command::HELP
    end
  end