img_from_target_files.py revision 2ed665a033c587b276b1615516e5354e2ace47cd 
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 os
36import shutil
37import zipfile
38
39import common
40
41OPTIONS = common.OPTIONS
42
43
44def CopyInfo(output_zip):
45  """Copy the android-info.txt file from the input to the output."""
46  common.ZipWrite(
47      output_zip, os.path.join(OPTIONS.input_tmp, "OTA", "android-info.txt"),
48      "android-info.txt")
49
50
51def main(argv):
52  bootable_only = [False]
53
54  def option_handler(o, _):
55    if o in ("-z", "--bootable_zip"):
56      bootable_only[0] = True
57    else:
58      return False
59    return True
60
61  args = common.ParseOptions(argv, __doc__,
62                             extra_opts="z",
63                             extra_long_opts=["bootable_zip"],
64                             extra_option_handler=option_handler)
65
66  bootable_only = bootable_only[0]
67
68  if len(args) != 2:
69    common.Usage(__doc__)
70    sys.exit(1)
71
72  OPTIONS.input_tmp, input_zip = common.UnzipTemp(args[0])
73  output_zip = zipfile.ZipFile(args[1], "w", compression=zipfile.ZIP_DEFLATED)
74  CopyInfo(output_zip)
75
76  try:
77    done = False
78    images_path = os.path.join(OPTIONS.input_tmp, "IMAGES")
79    if os.path.exists(images_path):
80      # If this is a new target-files, it already contains the images,
81      # and all we have to do is copy them to the output zip.
82      images = os.listdir(images_path)
83      if images:
84        for image in images:
85          if bootable_only and image not in ("boot.img", "recovery.img"):
86            continue
87          if not image.endswith(".img"):
88            continue
89          common.ZipWrite(
90              output_zip, os.path.join(images_path, image), image)
91        done = True
92
93    if not done:
94      # We have an old target-files that doesn't already contain the
95      # images, so build them.
96      import add_img_to_target_files
97
98      OPTIONS.info_dict = common.LoadInfoDict(input_zip)
99
100      # If this image was originally labelled with SELinux contexts,
101      # make sure we also apply the labels in our new image. During
102      # building, the "file_contexts" is in the out/ directory tree,
103      # but for repacking from target-files.zip it's in the root
104      # directory of the ramdisk.
105      if "selinux_fc" in OPTIONS.info_dict:
106        OPTIONS.info_dict["selinux_fc"] = os.path.join(
107            OPTIONS.input_tmp, "BOOT", "RAMDISK", "file_contexts")
108
109      boot_image = common.GetBootableImage(
110          "boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
111      if boot_image:
112        boot_image.AddToZip(output_zip)
113      recovery_image = common.GetBootableImage(
114          "recovery.img", "recovery.img", OPTIONS.input_tmp, "RECOVERY")
115      if recovery_image:
116        recovery_image.AddToZip(output_zip)
117
118      def banner(s):
119        print "\n\n++++ " + s + " ++++\n\n"
120
121      if not bootable_only:
122        banner("AddSystem")
123        add_img_to_target_files.AddSystem(output_zip, prefix="")
124        try:
125          input_zip.getinfo("VENDOR/")
126          banner("AddVendor")
127          add_img_to_target_files.AddVendor(output_zip, prefix="")
128        except KeyError:
129          pass   # no vendor partition for this device
130        banner("AddUserdata")
131        add_img_to_target_files.AddUserdata(output_zip, prefix="")
132        banner("AddCache")
133        add_img_to_target_files.AddCache(output_zip, prefix="")
134
135  finally:
136    print "cleaning up..."
137    common.ZipClose(output_zip)
138    shutil.rmtree(OPTIONS.input_tmp)
139
140  print "done."
141
142
143if __name__ == '__main__':
144  try:
145    common.CloseInheritedPipes()
146    main(sys.argv[1:])
147  except common.ExternalError as e:
148    print
149    print "   ERROR: %s" % (e,)
150    print
151    sys.exit(1)
152