class Rails::Generators::AppBase

def set_default_accessors! # :doc:
  self.destination_root = File.expand_path(app_path, destination_root)
  if options[:template].is_a?(String) && !options[:template].match?(/^https?:\/\//)
    interpolated = options[:template].gsub(/\$(\w+)|\$\{\g<1>\}|%\g<1>%/) { |m| ENV[$1] || m }
    self.rails_template = File.expand_path(interpolated)
  else
    self.rails_template = options[:template]
  end
end