class IRB::ExtendCommand::ShowCmds

def execute(*args)
  commands_info = IRB::ExtendCommandBundle.all_commands_info
  commands_grouped_by_categories = commands_info.group_by { |cmd| cmd[:category] }
  longest_cmd_name_length = commands_info.map { |c| c[:display_name].length }.max
  output = StringIO.new
  commands_grouped_by_categories.each do |category, cmds|
    output.puts Color.colorize(category, [:BOLD])
    cmds.each do |cmd|
      output.puts "  #{cmd[:display_name].to_s.ljust(longest_cmd_name_length)}    #{cmd[:description]}"
    end
    output.puts
  end
  puts output.string
  nil
end