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1#!/usr/bin/env python
2#
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.
6
7"""Pack relocations in a library (or copy unchanged).
8
9If --enable-packing and --configuration-name=='Release', invoke the
10relocation_packer tool to pack the .rel.dyn or .rela.dyn section in the given
11library files.  This step is inserted after the libraries are stripped.
12
13If --enable-packing is zero, the script copies files verbatim, with no
14attempt to pack relocations.
15
16Any library listed in --exclude-packing-list is also copied verbatim,
17irrespective of any --enable-packing setting.  Typically this would be
18'libchromium_android_linker.so'.
19"""
20
21import optparse
22import os
23import shutil
24import sys
25import tempfile
26
27from util import build_utils
28
29def PackLibraryRelocations(android_pack_relocations, library_path, output_path):
30  shutil.copy(library_path, output_path)
31  pack_command = [android_pack_relocations, output_path]
32  build_utils.CheckOutput(pack_command)
33
34
35def CopyLibraryUnchanged(library_path, output_path):
36  shutil.copy(library_path, output_path)
37
38
39def main(args):
40  args = build_utils.ExpandFileArgs(args)
41  parser = optparse.OptionParser()
42  build_utils.AddDepfileOption(parser)
43  parser.add_option('--clear-dir', action='store_true',
44                    help='If set, the destination directory will be deleted '
45                    'before copying files to it. This is highly recommended to '
46                    'ensure that no stale files are left in the directory.')
47
48  parser.add_option('--configuration-name',
49      default='Release',
50      help='Gyp configuration name (i.e. Debug, Release)')
51  parser.add_option('--enable-packing',
52      choices=['0', '1'],
53      help=('Pack relocations if 1 and configuration name is \'Release\','
54            ' otherwise plain file copy'))
55  parser.add_option('--exclude-packing-list',
56      default='',
57      help='Names of any libraries explicitly not packed')
58  parser.add_option('--android-pack-relocations',
59      help='Path to the relocations packer binary')
60  parser.add_option('--stripped-libraries-dir',
61      help='Directory for stripped libraries')
62  parser.add_option('--packed-libraries-dir',
63      help='Directory for packed libraries')
64  parser.add_option('--libraries', action='append',
65      help='List of libraries')
66  parser.add_option('--stamp', help='Path to touch on success')
67  parser.add_option('--filelistjson',
68                    help='Output path of filelist.json to write')
69
70  options, _ = parser.parse_args(args)
71  enable_packing = (options.enable_packing == '1' and
72                    options.configuration_name == 'Release')
73  exclude_packing_set = set(build_utils.ParseGypList(
74      options.exclude_packing_list))
75
76  libraries = []
77  for libs_arg in options.libraries:
78    libraries += build_utils.ParseGypList(libs_arg)
79
80  if options.clear_dir:
81    build_utils.DeleteDirectory(options.packed_libraries_dir)
82
83  build_utils.MakeDirectory(options.packed_libraries_dir)
84
85  output_paths = []
86  for library in libraries:
87    library_path = os.path.join(options.stripped_libraries_dir, library)
88    output_path = os.path.join(
89        options.packed_libraries_dir, os.path.basename(library))
90    output_paths.append(output_path)
91
92    if enable_packing and library not in exclude_packing_set:
93      PackLibraryRelocations(options.android_pack_relocations,
94                             library_path,
95                             output_path)
96    else:
97      CopyLibraryUnchanged(library_path, output_path)
98
99  if options.filelistjson:
100    build_utils.WriteJson({ 'files': output_paths }, options.filelistjson)
101
102  if options.depfile:
103    build_utils.WriteDepfile(
104        options.depfile,
105        libraries + build_utils.GetPythonDependencies())
106
107  if options.stamp:
108    build_utils.Touch(options.stamp)
109
110  return 0
111
112
113if __name__ == '__main__':
114  sys.exit(main(sys.argv[1:]))
115