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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 """ |
| 7 Generates shim headers that mirror the directory structure of bundled headers, |
| 8 but just forward to the system ones. |
| 9 |
| 10 This allows seamless compilation against system headers with no changes |
| 11 to our source code. |
| 12 """ |
| 13 |
| 14 |
| 15 import optparse |
| 16 import os.path |
| 17 import sys |
| 18 |
| 19 |
| 20 SHIM_TEMPLATE = """ |
| 21 #if defined(OFFICIAL_BUILD) |
| 22 #error shim headers must not be used in official builds! |
| 23 #endif |
| 24 |
| 25 #include <%s> |
| 26 """ |
| 27 |
| 28 |
| 29 def GeneratorMain(argv): |
| 30 parser = optparse.OptionParser() |
| 31 parser.add_option('--headers-root') |
| 32 parser.add_option('--output-directory') |
| 33 parser.add_option('--outputs', action='store_true') |
| 34 parser.add_option('--generate', action='store_true') |
| 35 |
| 36 options, args = parser.parse_args(argv) |
| 37 |
| 38 if not options.headers_root: |
| 39 parser.error('Missing --headers-root parameter.') |
| 40 if not options.output_directory: |
| 41 parser.error('Missing --output-directory parameter.') |
| 42 if not args: |
| 43 parser.error('Missing arguments - header file names.') |
| 44 |
| 45 source_tree_root = os.path.abspath( |
| 46 os.path.join(os.path.dirname(__file__), '..', '..')) |
| 47 |
| 48 target_directory = os.path.join( |
| 49 options.output_directory, |
| 50 os.path.relpath(options.headers_root, source_tree_root)) |
| 51 if options.generate and not os.path.exists(target_directory): |
| 52 os.makedirs(target_directory) |
| 53 for header_filename in args: |
| 54 if options.outputs: |
| 55 yield os.path.join(target_directory, header_filename) |
| 56 if options.generate: |
| 57 with open(os.path.join(target_directory, header_filename), 'w') as f: |
| 58 f.write(SHIM_TEMPLATE % header_filename) |
| 59 |
| 60 |
| 61 def DoMain(argv): |
| 62 return '\n'.join(GeneratorMain(argv)) |
| 63 |
| 64 |
| 65 if __name__ == '__main__': |
| 66 DoMain(sys.argv[1:]) |
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