text: # Copyright (C) 2013 Google Inc. All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are
  # met:
  #
  #     * Redistributions of source code must retain the above copyright
  # notice, this list of conditions and the following disclaimer.
  #     * Redistributions in binary form must reproduce the above
  # copyright notice, this list of conditions and the following disclaimer
  # in the documentation and/or other materials provided with the
  # distribution.
  #     * Neither the name of Google Inc. nor the names of its
  # contributors may be used to endorse or promote products derived from
  # this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  import os
  import sys
  
  _current_dir = os.path.dirname(os.path.realpath(__file__))
  # jinja2 is in chromium's third_party directory
  # Insert at front to override system libraries, and after path[0] == script dir
  sys.path.insert(1, os.path.join(_current_dir, *([os.pardir] * 4)))
  import jinja2
  
  
  def apply_template(path_to_template, params, filters=None):
      dirname, basename = os.path.split(path_to_template)
      path_to_templates = os.path.join(_current_dir, 'templates')
      jinja_env = jinja2.Environment(
          loader=jinja2.FileSystemLoader([dirname, path_to_templates]),
          keep_trailing_newline=True,  # newline-terminate generated files
          lstrip_blocks=True,  # so can indent control flow tags
          trim_blocks=True)  # so don't need {%- -%} everywhere
      if filters:
          jinja_env.filters.update(filters)
      template = jinja_env.get_template(basename)
      return template.render(params)
  
  
  def use_jinja(template_file_name, filters=None):
      def real_decorator(generator):
          def generator_internal(*args, **kwargs):
              parameters = generator(*args, **kwargs)
              return apply_template(template_file_name, parameters, filters=filters)
          generator_internal.func_name = generator.func_name
          return generator_internal
      return real_decorator
  