text: import os
  
  from .html import HTMLFile
  from .utils import create_parent_directory
  
  
  class RedirectFile(HTMLFile):
      def _render_to_output(self, output_path, jinja_environment):
          target_path = os.path.join(output_path, self.output_relative_path)
          create_parent_directory(target_path)
  
          redirect_to = open(self.path, "r").read().strip()
  
          template = jinja_environment.get_template("redirect.template.html")
          with open(target_path, "w+") as f:
              f.write(template.render(redirect_url=redirect_to))
  
          return target_path
  