class Rails::Engine

def find_root_with_flag(flag, default=nil)

def find_root_with_flag(flag, default=nil)
  root_path = self.called_from
  while root_path && File.directory?(root_path) && !File.exist?("#{root_path}/#{flag}")
    parent = File.dirname(root_path)
    root_path = parent != root_path && parent
  end
  root = File.exist?("#{root_path}/#{flag}") ? root_path : default
  raise "Could not find root path for #{self}" unless root
  RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ ?
    Pathname.new(root).expand_path : Pathname.new(root).realpath
end