class Thor::Runner

def list(search = "")
  initialize_thorfiles
  search = ".*#{search}" if options["substring"]
  search = /^#{search}.*/i
  group  = options[:group] || 'standard'
  
  classes = Thor.subclasses.select do |k| 
    (options[:all] || k.group_name == group) && 
    Thor::Util.constant_to_thor_path(k.name) =~ search
  end
  display_klasses(false, classes)
end