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1 #!/usr/bin/env python | |
2 # Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
3 # Use of this source code is governed by a BSD-style license that can be | |
4 # found in the LICENSE file. | |
5 | |
6 """Wipes out a directory recursively and then touches a stamp file. | |
7 | |
8 This odd pairing of operations is used to support build scripts which | |
9 slurp up entire directories (e.g. build/android/javac.py when handling | |
10 generated sources) as inputs. | |
11 | |
12 The general pattern of use is: | |
13 | |
14 - Add a target which generates |gen_sources| into |out_path| from |inputs|. | |
15 - Include |stamp_file| as an input for that target or any of its rules which | |
16 generate files in |out_path|. | |
17 - Add an action which depends on |inputs| and which outputs |stamp_file|; | |
18 the action should run this script and pass |out_path| and |stamp_file| as | |
19 its arguments. | |
20 | |
21 The net result is that you will force |out_path| to be wiped and all | |
22 |gen_sources| to be regenerated any time any file in |inputs| changes. | |
23 | |
24 See //mojo/mojom_bindings_generator.gypi for an example use case. | |
25 | |
26 """ | |
27 | |
28 import errno | |
29 import os | |
30 import shutil | |
31 import sys | |
32 | |
33 | |
34 def Main(dst_dir, stamp_file): | |
35 try: | |
36 shutil.rmtree(os.path.normpath(dst_dir)) | |
37 except OSError as e: | |
38 # Ignore only "not found" errors. | |
39 if e.errno != errno.ENOENT: | |
40 raise e | |
41 with open(stamp_file, 'a'): | |
42 os.utime(stamp_file, None) | |
43 | |
44 if __name__ == '__main__': | |
45 sys.exit(Main(sys.argv[1], sys.argv[2])) | |
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