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1 # Copyright 2014 The Chromium Authors. All rights reserved. | 1 # Copyright 2014 The Chromium Authors. All rights reserved. |
2 # Use of this source code is governed by a BSD-style license that can be | 2 # Use of this source code is governed by a BSD-style license that can be |
3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
4 | 4 |
5 """Utility functions (file reading, simple IDL parsing by regexes) for IDL build
. | 5 """Utility functions (file reading, simple IDL parsing by regexes) for IDL build
. |
6 | 6 |
7 Design doc: http://www.chromium.org/developers/design-documents/idl-build | 7 Design doc: http://www.chromium.org/developers/design-documents/idl-build |
8 """ | 8 """ |
9 | 9 |
10 import os | 10 import os |
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32 with open(destination_filename) as destination_file: | 32 with open(destination_filename) as destination_file: |
33 if destination_file.read() == new_text: | 33 if destination_file.read() == new_text: |
34 return | 34 return |
35 with open(destination_filename, 'w') as destination_file: | 35 with open(destination_filename, 'w') as destination_file: |
36 destination_file.write(new_text) | 36 destination_file.write(new_text) |
37 | 37 |
38 | 38 |
39 def write_pickle_file(pickle_filename, data, only_if_changed): | 39 def write_pickle_file(pickle_filename, data, only_if_changed): |
40 if only_if_changed and os.path.isfile(pickle_filename): | 40 if only_if_changed and os.path.isfile(pickle_filename): |
41 with open(pickle_filename) as pickle_file: | 41 with open(pickle_filename) as pickle_file: |
42 if pickle.load(pickle_file) == data: | 42 try: |
43 return | 43 if pickle.load(pickle_file) == data: |
| 44 return |
| 45 except (EOFError, pickle.UnpicklingError): |
| 46 # If trouble unpickling, overwrite |
| 47 pass |
44 with open(pickle_filename, 'w') as pickle_file: | 48 with open(pickle_filename, 'w') as pickle_file: |
45 pickle.dump(data, pickle_file) | 49 pickle.dump(data, pickle_file) |
46 | 50 |
47 | 51 |
48 ################################################################################ | 52 ################################################################################ |
49 # IDL parsing | 53 # IDL parsing |
50 # | 54 # |
51 # We use regular expressions for parsing; this is incorrect (Web IDL is not a | 55 # We use regular expressions for parsing; this is incorrect (Web IDL is not a |
52 # regular language), but simple and sufficient in practice. | 56 # regular language), but simple and sufficient in practice. |
53 # Leading and trailing context (e.g. following '{') used to avoid false matches. | 57 # Leading and trailing context (e.g. following '{') used to avoid false matches. |
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141 | 145 |
142 def get_put_forward_interfaces_from_idl(file_contents): | 146 def get_put_forward_interfaces_from_idl(file_contents): |
143 put_forwards_pattern = (r'\[[^\]]*PutForwards=[^\]]*\]\s+' | 147 put_forwards_pattern = (r'\[[^\]]*PutForwards=[^\]]*\]\s+' |
144 r'readonly\s+' | 148 r'readonly\s+' |
145 r'attribute\s+' | 149 r'attribute\s+' |
146 r'(\w+)') | 150 r'(\w+)') |
147 return sorted(set(match.group(1) | 151 return sorted(set(match.group(1) |
148 for match in re.finditer(put_forwards_pattern, | 152 for match in re.finditer(put_forwards_pattern, |
149 file_contents, | 153 file_contents, |
150 flags=re.DOTALL))) | 154 flags=re.DOTALL))) |
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