am 3907eaf8: am cd082d4b: Allow system images larger than 2GiB.

import errno

import os

import re

import shutil

import subprocess

import tempfile

import zipfile

  block_list = common.MakeTempFile(prefix="system-blocklist-", suffix=".map")

  imgname = BuildSystem(OPTIONS.input_tmp, OPTIONS.info_dict,

                        block_list=block_list)

  with open(imgname, "rb") as f:

    common.ZipWriteStr(output_zip, prefix + "system.img", f.read())

  with open(block_list, "rb") as f:

    common.ZipWriteStr(output_zip, prefix + "system.map", f.read())

  common.ZipWrite(output_zip, imgname, prefix + "system.img")

  common.ZipWrite(output_zip, block_list, prefix + "system.map")

def BuildSystem(input_dir, info_dict, block_list=None):

  block_list = common.MakeTempFile(prefix="vendor-blocklist-", suffix=".map")

  imgname = BuildVendor(OPTIONS.input_tmp, OPTIONS.info_dict,

                     block_list=block_list)

  with open(imgname, "rb") as f:

    common.ZipWriteStr(output_zip, prefix + "vendor.img", f.read())

  with open(block_list, "rb") as f:

    common.ZipWriteStr(output_zip, prefix + "vendor.map", f.read())

  common.ZipWrite(output_zip, imgname, prefix + "vendor.img")

  common.ZipWrite(output_zip, block_list, prefix + "vendor.map")

def BuildVendor(input_dir, info_dict, block_list=None):

  output_zip.close()

def main(argv):

  def option_handler(o, a):

    if o in ("-a", "--add_missing"):

      OPTIONS.add_missing = True

    return result

def ZipWrite(zip_file, filename, arcname=None, perms=0o644,

             compress_type=None):

  import datetime

  # http://b/18015246

  # Python 2.7's zipfile implementation wrongly thinks that zip64 is required

  # for files larger than 2GiB. We can work around this by adjusting their

  # limit. Note that `zipfile.writestr()` will not work for strings larger than

  # 2GiB. The Python interpreter sometimes rejects strings that large (though

  # it isn't clear to me exactly what circumstances cause this).

  # `zipfile.write()` must be used directly to work around this.

  #

  # This mess can be avoided if we port to python3.

  saved_zip64_limit = zipfile.ZIP64_LIMIT

  zipfile.ZIP64_LIMIT = (1 << 32) - 1

  compress_type = compress_type or zip_file.compression

  arcname = arcname or filename

  saved_stat = os.stat(filename)

  try:

    # `zipfile.write()` doesn't allow us to pass ZipInfo, so just modify the

    # file to be zipped and reset it when we're done.

    os.chmod(filename, perms)

    # Use a fixed timestamp so the output is repeatable.

    epoch = datetime.datetime.fromtimestamp(0)

    timestamp = (datetime.datetime(2009, 1, 1) - epoch).total_seconds()

    os.utime(filename, (timestamp, timestamp))

    zip_file.write(filename, arcname=arcname, compress_type=compress_type)

  finally:

    os.chmod(filename, saved_stat.st_mode)

    os.utime(filename, (saved_stat.st_atime, saved_stat.st_mtime))

    zipfile.ZIP64_LIMIT = saved_zip64_limit

def ZipWriteStr(zip, filename, data, perms=0644, compression=None):

  # use a fixed timestamp so the output is repeatable.

  zinfo = zipfile.ZipInfo(filename=filename,

                          self.tgt.TotalSha1(), self.partition))

  def _WriteUpdate(self, script, output_zip):

    partition = self.partition

    with open(self.path + ".transfer.list", "rb") as f:

      ZipWriteStr(output_zip, partition + ".transfer.list", f.read())

    with open(self.path + ".new.dat", "rb") as f:

      ZipWriteStr(output_zip, partition + ".new.dat", f.read())

    with open(self.path + ".patch.dat", "rb") as f:

      ZipWriteStr(output_zip, partition + ".patch.dat", f.read(),

                         compression=zipfile.ZIP_STORED)

    call = (('block_image_update("%s", '

             'package_extract_file("%s.transfer.list"), '

             '"%s.new.dat", "%s.patch.dat");\n') %

            (self.device, partition, partition, partition))

    ZipWrite(output_zip,

             '{}.transfer.list'.format(self.path),

             '{}.transfer.list'.format(self.partition))

    ZipWrite(output_zip,

             '{}.new.dat'.format(self.path),

             '{}.new.dat'.format(self.partition))

    ZipWrite(output_zip,

             '{}.patch.dat'.format(self.path),

             '{}.patch.dat'.format(self.partition),

             compress_type=zipfile.ZIP_STORED)

    call = ('block_image_update("{device}", '

            'package_extract_file("{partition}.transfer.list"), '

            '"{partition}.new.dat", "{partition}.patch.dat");\n'.format(

                device=self.device, partition=self.partition))

    script.AppendExtra(script._WordWrap(call))

  def _CheckFirstBlock(self, script):

      # and all we have to do is copy them to the output zip.

      images = os.listdir(images_path)

      if images:

        for i in images:

          if bootable_only and i not in ("boot.img", "recovery.img"): continue

          if not i.endswith(".img"): continue

          with open(os.path.join(images_path, i), "r") as f:

            common.ZipWriteStr(output_zip, i, f.read())

        for image in images:

          if bootable_only and image not in ("boot.img", "recovery.img"):

            continue

          if not image.endswith(".img"):

            continue

          common.ZipWrite(

              output_zip, os.path.join(images_path, image), image)

        done = True

    if not done:

  WriteMetadata(metadata, output_zip)

def WritePolicyConfig(file_context, output_zip):

  f = open(file_context, 'r');

  basename = os.path.basename(file_context)

  common.ZipWriteStr(output_zip, basename, f.read())

def WritePolicyConfig(file_name, output_zip):

  common.ZipWrite(output_zip, file_name, os.path.basename(file_name))

def WriteMetadata(metadata, output_zip):

#

# Copyright (C) 2015 The Android Open Source Project

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#      http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

import os

import tempfile

import time

import unittest

import zipfile

import common

def random_string_with_holes(size, block_size, step_size):

  data = ["\0"] * size

  for begin in range(0, size, step_size):

    end = begin + block_size

    data[begin:end] = os.urandom(block_size)

  return "".join(data)

class CommonZipTest(unittest.TestCase):

  def _test_ZipWrite(self, contents, extra_zipwrite_args=None):

    extra_zipwrite_args = dict(extra_zipwrite_args or {})

    test_file = tempfile.NamedTemporaryFile(delete=False)

    zip_file = tempfile.NamedTemporaryFile(delete=False)

    test_file_name = test_file.name

    zip_file_name = zip_file.name

    # File names within an archive strip the leading slash.

    arcname = extra_zipwrite_args.get("arcname", test_file_name)

    if arcname[0] == "/":

      arcname = arcname[1:]

    zip_file.close()

    zip_file = zipfile.ZipFile(zip_file_name, "w")

    try:

      test_file.write(contents)

      test_file.close()

      old_stat = os.stat(test_file_name)

      expected_mode = extra_zipwrite_args.get("perms", 0o644)

      time.sleep(5)  # Make sure the atime/mtime will change measurably.

      common.ZipWrite(zip_file, test_file_name, **extra_zipwrite_args)

      new_stat = os.stat(test_file_name)

      self.assertEqual(int(old_stat.st_mode), int(new_stat.st_mode))

      self.assertEqual(int(old_stat.st_mtime), int(new_stat.st_mtime))

      zip_file.close()

      zip_file = zipfile.ZipFile(zip_file_name, "r")

      info = zip_file.getinfo(arcname)

      self.assertEqual(info.date_time, (2009, 1, 1, 0, 0, 0))

      mode = (info.external_attr >> 16) & 0o777

      self.assertEqual(mode, expected_mode)

      self.assertEqual(zip_file.read(arcname), contents)

    finally:

      os.remove(test_file_name)

      os.remove(zip_file_name)

  def test_ZipWrite(self):

    file_contents = os.urandom(1024)

    self._test_ZipWrite(file_contents)

  def test_ZipWrite_with_opts(self):

    file_contents = os.urandom(1024)

    self._test_ZipWrite(file_contents, {

        "arcname": "foobar",

        "perms": 0o777,

        "compress_type": zipfile.ZIP_DEFLATED,

    })

  def test_ZipWrite_large_file(self):

    kilobytes = 1024

    megabytes = 1024 * kilobytes

    gigabytes = 1024 * megabytes

    size = int(2 * gigabytes + 1)

    block_size = 4 * kilobytes

    step_size = 4 * megabytes

    file_contents = random_string_with_holes(

        size, block_size, step_size)

    self._test_ZipWrite(file_contents, {

        "compress_type": zipfile.ZIP_DEFLATED,

    })

  def test_ZipWrite_resets_ZIP64_LIMIT(self):

    default_limit = (1 << 31) - 1

    self.assertEqual(default_limit, zipfile.ZIP64_LIMIT)

    self._test_ZipWrite('')

    self.assertEqual(default_limit, zipfile.ZIP64_LIMIT)