img_from_target_files.py revision 6701db814585431ee032a5dab26a9c9af2323c7e 
1#!/usr/bin/env python
2#
3# Copyright (C) 2008 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16
17"""
18Given a target-files zipfile, produces an image zipfile suitable for
19use with 'fastboot update'.
20
21Usage:  img_from_target_files [flags] input_target_files output_image_zip
22
23  -z  (--bootable_zip)
24      Include only the bootable images (eg 'boot' and 'recovery') in
25      the output.
26
27"""
28
29import sys
30
31if sys.hexversion < 0x02070000:
32  print >> sys.stderr, "Python 2.7 or newer is required."
33  sys.exit(1)
34
35import errno
36import os
37import re
38import shutil
39import subprocess
40import tempfile
41import zipfile
42
43# missing in Python 2.4 and before
44if not hasattr(os, "SEEK_SET"):
45  os.SEEK_SET = 0
46
47import common
48
49OPTIONS = common.OPTIONS
50
51
52def CopyInfo(output_zip):
53  """Copy the android-info.txt file from the input to the output."""
54  output_zip.write(os.path.join(OPTIONS.input_tmp, "OTA", "android-info.txt"),
55                   "android-info.txt")
56
57
58def main(argv):
59  bootable_only = [False]
60
61  def option_handler(o, a):
62    if o in ("-z", "--bootable_zip"):
63      bootable_only[0] = True
64    else:
65      return False
66    return True
67
68  args = common.ParseOptions(argv, __doc__,
69                             extra_opts="z",
70                             extra_long_opts=["bootable_zip"],
71                             extra_option_handler=option_handler)
72
73  bootable_only = bootable_only[0]
74
75  if len(args) != 2:
76    common.Usage(__doc__)
77    sys.exit(1)
78
79  OPTIONS.input_tmp, input_zip = common.UnzipTemp(args[0])
80  output_zip = zipfile.ZipFile(args[1], "w", compression=zipfile.ZIP_DEFLATED)
81  CopyInfo(output_zip)
82
83  try:
84    done = False
85    images_path = os.path.join(OPTIONS.input_tmp, "IMAGES")
86    if os.path.exists(images_path):
87      # If this is a new target-files, it already contains the images,
88      # and all we have to do is copy them to the output zip.
89      images = os.listdir(images_path)
90      if images:
91        for image in images:
92          if bootable_only and image not in ("boot.img", "recovery.img"):
93            continue
94          if not image.endswith(".img"):
95            continue
96          common.ZipWrite(
97              output_zip, os.path.join(images_path, image), image)
98        done = True
99
100    if not done:
101      # We have an old target-files that doesn't already contain the
102      # images, so build them.
103      import add_img_to_target_files
104
105      OPTIONS.info_dict = common.LoadInfoDict(input_zip)
106
107      # If this image was originally labelled with SELinux contexts,
108      # make sure we also apply the labels in our new image. During
109      # building, the "file_contexts" is in the out/ directory tree,
110      # but for repacking from target-files.zip it's in the root
111      # directory of the ramdisk.
112      if "selinux_fc" in OPTIONS.info_dict:
113        OPTIONS.info_dict["selinux_fc"] = os.path.join(
114            OPTIONS.input_tmp, "BOOT", "RAMDISK", "file_contexts")
115
116      boot_image = common.GetBootableImage(
117          "boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
118      if boot_image:
119          boot_image.AddToZip(output_zip)
120      recovery_image = common.GetBootableImage(
121          "recovery.img", "recovery.img", OPTIONS.input_tmp, "RECOVERY")
122      if recovery_image:
123        recovery_image.AddToZip(output_zip)
124
125      def banner(s):
126        print "\n\n++++ " + s + " ++++\n\n"
127
128      if not bootable_only:
129        banner("AddSystem")
130        add_img_to_target_files.AddSystem(output_zip, prefix="")
131        try:
132          input_zip.getinfo("VENDOR/")
133          banner("AddVendor")
134          add_img_to_target_files.AddVendor(output_zip, prefix="")
135        except KeyError:
136          pass   # no vendor partition for this device
137        banner("AddUserdata")
138        add_img_to_target_files.AddUserdata(output_zip, prefix="")
139        banner("AddCache")
140        add_img_to_target_files.AddCache(output_zip, prefix="")
141
142  finally:
143    print "cleaning up..."
144    # http://b/18015246
145    # See common.py for context.  zipfile also refers to ZIP64_LIMIT during
146    # close() when it writes out the central directory.
147    saved_zip64_limit = zipfile.ZIP64_LIMIT
148    zipfile.ZIP64_LIMIT = (1 << 32) - 1
149    output_zip.close()
150    zipfile.ZIP64_LIMIT = saved_zip64_limit
151    shutil.rmtree(OPTIONS.input_tmp)
152
153  print "done."
154
155
156if __name__ == '__main__':
157  try:
158    common.CloseInheritedPipes()
159    main(sys.argv[1:])
160  except common.ExternalError, e:
161    print
162    print "   ERROR: %s" % (e,)
163    print
164    sys.exit(1)
165