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1# Copyright 2013 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5# Based on third_party/WebKit/Source/build/scripts/template_expander.py.
6
7import os.path
8import sys
9
10_current_dir = os.path.dirname(os.path.realpath(__file__))
11# jinja2 is in chromium's third_party directory
12# Insert at front to override system libraries, and after path[0] == script dir
13sys.path.insert(
14    1, os.path.join(_current_dir, *([os.pardir] * 7 + ['third_party'])))
15import jinja2
16
17
18def ApplyTemplate(mojo_generator, path_to_template, params, **kwargs):
19  loader = jinja2.ModuleLoader(os.path.join(
20      mojo_generator.bytecode_path, "%s.zip" % mojo_generator.GetTemplatePrefix(
21      )))
22  final_kwargs = dict(mojo_generator.GetJinjaParameters())
23  final_kwargs.update(kwargs)
24  jinja_env = jinja2.Environment(loader=loader,
25                                 keep_trailing_newline=True,
26                                 **final_kwargs)
27  jinja_env.globals.update(mojo_generator.GetGlobals())
28  jinja_env.filters.update(mojo_generator.GetFilters())
29  template = jinja_env.get_template(path_to_template)
30  return template.render(params)
31
32
33def UseJinja(path_to_template, **kwargs):
34  def RealDecorator(generator):
35    def GeneratorInternal(*args, **kwargs2):
36      parameters = generator(*args, **kwargs2)
37      return ApplyTemplate(args[0], path_to_template, parameters, **kwargs)
38    GeneratorInternal.func_name = generator.func_name
39    return GeneratorInternal
40  return RealDecorator
41
42
43def PrecompileTemplates(generator_modules, output_dir):
44  for module in generator_modules.values():
45    generator = module.Generator(None)
46    jinja_env = jinja2.Environment(loader=jinja2.FileSystemLoader([os.path.join(
47        os.path.dirname(module.__file__), generator.GetTemplatePrefix())]))
48    jinja_env.filters.update(generator.GetFilters())
49    jinja_env.compile_templates(
50        os.path.join(output_dir, "%s.zip" % generator.GetTemplatePrefix()),
51        extensions=["tmpl"],
52        zip="stored",
53        py_compile=True,
54        ignore_errors=False)
55