img_from_target_files.py revision fdd8e69c42e66fb70384bcaca1747f504f2c021c 
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  -b  (--board_config)  <file>
24      Deprecated.
25
26"""
27
28import sys
29
30if sys.hexversion < 0x02040000:
31  print >> sys.stderr, "Python 2.4 or newer is required."
32  sys.exit(1)
33
34import os
35import re
36import shutil
37import subprocess
38import tempfile
39import zipfile
40
41# missing in Python 2.4 and before
42if not hasattr(os, "SEEK_SET"):
43  os.SEEK_SET = 0
44
45import common
46
47OPTIONS = common.OPTIONS
48
49
50def AddUserdata(output_zip):
51  """Create an empty userdata image and store it in output_zip."""
52
53  print "creating userdata.img..."
54
55  # The name of the directory it is making an image out of matters to
56  # mkyaffs2image.  So we create a temp dir, and within it we create an
57  # empty dir named "data", and build the image from that.
58  temp_dir = tempfile.mkdtemp()
59  user_dir = os.path.join(temp_dir, "data")
60  os.mkdir(user_dir)
61  img = tempfile.NamedTemporaryFile()
62
63  p = common.Run(["mkyaffs2image", "-f", user_dir, img.name])
64  p.communicate()
65  assert p.returncode == 0, "mkyaffs2image of userdata.img image failed"
66
67  common.CheckSize(img.name, "userdata.img")
68  output_zip.write(img.name, "userdata.img")
69  img.close()
70  os.rmdir(user_dir)
71  os.rmdir(temp_dir)
72
73
74def AddSystem(output_zip):
75  """Turn the contents of SYSTEM into a system image and store it in
76  output_zip."""
77
78  print "creating system.img..."
79
80  img = tempfile.NamedTemporaryFile()
81
82  # The name of the directory it is making an image out of matters to
83  # mkyaffs2image.  It wants "system" but we have a directory named
84  # "SYSTEM", so create a symlink.
85  os.symlink(os.path.join(OPTIONS.input_tmp, "SYSTEM"),
86             os.path.join(OPTIONS.input_tmp, "system"))
87
88  p = common.Run(["mkyaffs2image", "-f",
89                  os.path.join(OPTIONS.input_tmp, "system"), img.name])
90  p.communicate()
91  assert p.returncode == 0, "mkyaffs2image of system.img image failed"
92
93  img.seek(os.SEEK_SET, 0)
94  data = img.read()
95  img.close()
96
97  common.CheckSize(data, "system.img")
98  common.ZipWriteStr(output_zip, "system.img", data)
99
100
101def CopyInfo(output_zip):
102  """Copy the android-info.txt file from the input to the output."""
103  output_zip.write(os.path.join(OPTIONS.input_tmp, "OTA", "android-info.txt"),
104                   "android-info.txt")
105
106
107def main(argv):
108
109  def option_handler(o, a):
110    if o in ("-b", "--board_config"):
111      pass       # deprecated
112    else:
113      return False
114    return True
115
116  args = common.ParseOptions(argv, __doc__,
117                             extra_opts="b:",
118                             extra_long_opts=["board_config="],
119                             extra_option_handler=option_handler)
120
121  if len(args) != 2:
122    common.Usage(__doc__)
123    sys.exit(1)
124
125  OPTIONS.input_tmp = common.UnzipTemp(args[0])
126
127  common.LoadMaxSizes()
128  if not OPTIONS.max_image_size:
129    print
130    print "  WARNING:  Failed to load max image sizes; will not enforce"
131    print "  image size limits."
132    print
133
134  output_zip = zipfile.ZipFile(args[1], "w", compression=zipfile.ZIP_DEFLATED)
135
136  common.AddBoot(output_zip)
137  common.AddRecovery(output_zip)
138  AddSystem(output_zip)
139  AddUserdata(output_zip)
140  CopyInfo(output_zip)
141
142  print "cleaning up..."
143  output_zip.close()
144  shutil.rmtree(OPTIONS.input_tmp)
145
146  print "done."
147
148
149if __name__ == '__main__':
150  try:
151    main(sys.argv[1:])
152  except common.ExternalError, e:
153    print
154    print "   ERROR: %s" % (e,)
155    print
156    sys.exit(1)
157