1 # Copyright (C) 2013 Google Inc. All rights reserved. 2 # 3 # Redistribution and use in source and binary forms, with or without 4 # modification, are permitted provided that the following conditions are 5 # met: 6 # 7 # * Redistributions of source code must retain the above copyright 8 # notice, this list of conditions and the following disclaimer. 9 # * Redistributions in binary form must reproduce the above 10 # copyright notice, this list of conditions and the following disclaimer 11 # in the documentation and/or other materials provided with the 12 # distribution. 13 # * Neither the name of Google Inc. nor the names of its 14 # contributors may be used to endorse or promote products derived from 15 # this software without specific prior written permission. 16 # 17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 import os 30 import sys 31 32 _current_dir = os.path.dirname(os.path.realpath(__file__)) 33 # jinja2 is in chromium's third_party directory 34 # Insert at front to override system libraries, and after path[0] == script dir 35 sys.path.insert(1, os.path.join(_current_dir, *([os.pardir] * 4))) 36 import jinja2 37 38 39 def apply_template(path_to_template, params, filters=None): 40 dirname, basename = os.path.split(path_to_template) 41 path_to_templates = os.path.join(_current_dir, 'templates') 42 jinja_env = jinja2.Environment( 43 loader=jinja2.FileSystemLoader([dirname, path_to_templates]), 44 keep_trailing_newline=True, # newline-terminate generated files 45 lstrip_blocks=True, # so can indent control flow tags 46 trim_blocks=True) # so don't need {%- -%} everywhere 47 if filters: 48 jinja_env.filters.update(filters) 49 template = jinja_env.get_template(basename) 50 return template.render(params) 51 52 53 def use_jinja(template_file_name, filters=None): 54 def real_decorator(generator): 55 def generator_internal(*args, **kwargs): 56 parameters = generator(*args, **kwargs) 57 return apply_template(template_file_name, parameters, filters=filters) 58 generator_internal.func_name = generator.func_name 59 return generator_internal 60 return real_decorator 61
