module Byebug::Subcommands

def execute
  return puts(help) unless @match[1]
  subcmd = subcommands.find(@match[1])
  return errmsg("Unknown subcommand '#{@match[1]}'\n") unless subcmd
  subcmd.execute
end

def help
  prettify <<-EOH
    #{description}
    List of "#{to_name}" subcommands:
    --
    #{subcommands}
  EOH
end

def short_description
  fail(NotImplementedError, 'Your custom subcommand needs to define this')
end

def subcommands
  subcmd_klasses = self.class.subcommands
  return nil unless subcmd_klasses.any?
  subcmd_list = subcmd_klasses.map { |cmd| cmd.new(@state) }
  SubcommandList.new(subcmd_list, self.class.name)
end