3 # Copyright 2014 The Chromium Authors. All rights reserved.
4 # Use of this source code is governed by a BSD-style license that can be
5 # found in the LICENSE file.
7 """Renders one or more template files using the Jinja template engine."""
13 from util import build_utils
15 # Import jinja2 from third_party/jinja2
16 sys.path.append(os.path.join(os.path.dirname(__file__), '../../../third_party'))
17 import jinja2 # pylint: disable=F0401
20 def ProcessFile(input_filename, output_filename, variables):
21 with open(input_filename, 'r') as input_file:
22 input_ = input_file.read()
23 env = jinja2.Environment(undefined=jinja2.StrictUndefined)
24 template = env.from_string(input_)
25 template.filename = os.path.abspath(input_filename)
26 output = template.render(variables)
27 with open(output_filename, 'w') as output_file:
28 output_file.write(output)
31 def ProcessFiles(input_filenames, inputs_base_dir, outputs_zip, variables):
32 with build_utils.TempDir() as temp_dir:
33 for input_filename in input_filenames:
34 relpath = os.path.relpath(os.path.abspath(input_filename),
35 os.path.abspath(inputs_base_dir))
36 if relpath.startswith(os.pardir):
37 raise Exception('input file %s is not contained in inputs base dir %s'
38 % input_filename, inputs_base_dir)
40 output_filename = os.path.join(temp_dir, relpath)
41 parent_dir = os.path.dirname(output_filename)
42 build_utils.MakeDirectory(parent_dir)
43 ProcessFile(input_filename, output_filename, variables)
45 build_utils.ZipDir(outputs_zip, temp_dir)
49 parser = optparse.OptionParser()
50 build_utils.AddDepfileOption(parser)
51 parser.add_option('--inputs', help='The template files to process.')
52 parser.add_option('--output', help='The output file to generate. Valid '
53 'only if there is a single input.')
54 parser.add_option('--outputs-zip', help='A zip file containing the processed '
55 'templates. Required if there are multiple inputs.')
56 parser.add_option('--inputs-base-dir', help='A common ancestor directory of '
57 'the inputs. Each output\'s path in the output zip will '
58 'match the relative path from INPUTS_BASE_DIR to the '
59 'input. Required if --output-zip is given.')
60 parser.add_option('--variables', help='Variables to be made available in the '
61 'template processing environment, as a GYP list (e.g. '
62 '--variables "channel=beta mstone=39")', default='')
63 options, args = parser.parse_args()
65 build_utils.CheckOptions(options, parser, required=['inputs'])
66 inputs = build_utils.ParseGypList(options.inputs)
68 if (options.output is None) == (options.outputs_zip is None):
69 parser.error('Exactly one of --output and --output-zip must be given')
70 if options.output and len(inputs) != 1:
71 parser.error('--output cannot be used with multiple inputs')
72 if options.outputs_zip and not options.inputs_base_dir:
73 parser.error('--inputs-base-dir must be given when --output-zip is used')
75 parser.error('No positional arguments should be given.')
78 for v in build_utils.ParseGypList(options.variables):
80 parser.error('--variables argument must contain "=": ' + v)
81 name, _, value = v.partition('=')
82 variables[name] = value
85 ProcessFile(inputs[0], options.output, variables)
87 ProcessFiles(inputs, options.inputs_base_dir, options.outputs_zip,
91 deps = inputs + build_utils.GetPythonDependencies()
92 build_utils.WriteDepfile(options.depfile, deps)
95 if __name__ == '__main__':