OTA包编译脚本位于build/tools/releasetools/ota_from_target_files,具体代码如下：
"""
Given a target-files zipfile, produces an OTA package that installs
that build. An incremental OTA is produced if -i is given, otherwise
a full OTA is produced.
给定目标文件zipfile，生成一个安装的OTA包
建立。 如果给出-i，则生成增量OTA，否则制作完整的OTA。
Usage: ota_from_target_files [flags] input_target_files output_ota_package
--board_config <file>
Deprecated.
-k (--package_key) <key> Key to use to sign the package (default is
the value of default_system_dev_certificate from the input
target-files's META/misc_info.txt, or
"build/target/product/security/testkey" if that value is not
specified).
For incremental OTAs, the default value is based on the source
target-file, not the target build.
给安装包签名的密匙，默认值为输入target包META/misc_info.txt中的default_system_dev_certificate。
或者是build/target/product/security/testkey（如果这个值没有指定）
如果是差分包，默认值会依照源 target-file，而不是生成的target包
-i (--incremental_from) <file>
Generate an incremental OTA using the given target-files zip as
the starting build.
编译差分包
--full_radio
When generating an incremental OTA, always include a full copy of
radio image. This option is only meaningful when -i is specified,
because a full radio is always included in a full OTA if applicable.
--full_bootloader
Similar to --full_radio. When generating an incremental OTA, always
include a full copy of bootloader image.
-v (--verify)
Remount and verify the checksums of the files written to the
system and vendor (if used) partitions. Incremental builds only.
冗余模式，对写入system和vendor的数据进行重复验证。（仅仅在差分包时有）
-o (--oem_settings) <file>
Use the file to specify the expected OEM-specific properties
on the OEM partition of the intended device.
--oem_no_mount
For devices with OEM-specific properties but without an OEM partition,
do not mount the OEM partition in the updater-script. This should be
very rarely used, since it's expected to have a dedicated OEM partition
for OEM-specific properties. Only meaningful when -o is specified.
-w (--wipe_user_data)
Generate an OTA package that will wipe the user data partition
when installed.
升级的时候是否清楚userdata分区
-n (--no_prereq)
Omit the timestamp prereq check normally included at the top of
the build scripts (used for developer OTA packages which
legitimately need to go back and forth).
--downgrade
Intentionally generate an incremental OTA that updates from a newer
build to an older one (based on timestamp comparison). "post-timestamp"
will be replaced by "ota-downgrade=yes" in the metadata file. A data
wipe will always be enforced, so "ota-wipe=yes" will also be included in
the metadata file. The update-binary in the source build will be used in
the OTA package, unless --binary flag is specified.
-e (--extra_script) <file>
Insert the contents of file at the end of the update script.
需要其他的脚本
-a (--aslr_mode) <on|off>
Specify whether to turn on ASLR for the package (on by default).
-2 (--two_step)
Generate a 'two-step' OTA package, where recovery is updated
first, so that any changes made to the system partition are done
using the new recovery (new kernel, etc.).
--block
Generate a block-based OTA if possible. Will fall back to a
file-based OTA if the target_files is older and doesn't support
block-based OTAs.
如果可能，生成基于块的OTA。 如果目标_files较旧且不支持基于块的OTA，则将返回到基于文件的OTA。
-b (--binary) <file>
Use the given binary as the update-binary in the output package,
instead of the binary in the build's target_files. Use for
development only.
-t (--worker_threads) <int>
Specifies the number of worker-threads that will be used when
generating patches for incremental updates (defaults to 3).
--stash_threshold <float>
Specifies the threshold that will be used to compute the maximum
allowed stash size (defaults to 0.8).
--gen_verify
Generate an OTA package that verifies the partitions.
--log_diff <file>
Generate a log file that shows the differences in the source and target
builds for an incremental package. This option is only meaningful when
-i is specified.
"""
上面是使用该脚本用到的相关参数，重要的参数已备注注解在上面。下面是正式代码。
import sys
if sys.hexversion < 0x02070000:
print >> sys.stderr, "Python 2.7 or newer is required."
sys.exit(1)
import multiprocessing
import os
import subprocess
import tempfile
import zipfile
import common
import edify_generator
import sparse_img
OPTIONS = common.OPTIONS
OPTIONS.package_key = None
OPTIONS.incremental_source = None
OPTIONS.verify = False
OPTIONS.require_verbatim = set()
OPTIONS.prohibit_verbatim = set(("system/build.prop",))
OPTIONS.patch_threshold = 0.95
OPTIONS.wipe_user_data = False
OPTIONS.omit_prereq = False
OPTIONS.downgrade = False
OPTIONS.extra_script = None
OPTIONS.aslr_mode = True
OPTIONS.worker_threads = multiprocessing.cpu_count() // 2
if OPTIONS.worker_threads == 0:
OPTIONS.worker_threads = 1
OPTIONS.two_step = False
OPTIONS.no_signing = False
OPTIONS.block_based = False
OPTIONS.updater_binary = None
OPTIONS.oem_source = None
OPTIONS.oem_no_mount = False
OPTIONS.fallback_to_full = True
OPTIONS.full_radio = False
OPTIONS.ubifs = False
OPTIONS.full_bootloader = False
# Stash size cannot exceed cache_size * threshold.
OPTIONS.cache_size = None
OPTIONS.stash_threshold = 0.8
OPTIONS.gen_verify = False
OPTIONS.log_diff = None
def MostPopularKey(d, default):
"""Given a dict, return the key corresponding to the largest
value. Returns 'default' if the dict is empty."""
x = [(v, k) for (k, v) in d.iteritems()]
if not x:
return default
x.sort()
return x[-1][1]
def IsSymlink(info):
"""Return true if the zipfile.ZipInfo object passed in represents a
symlink."""
return (info.external_attr >> 16) & 0o770000 == 0o120000
def IsRegular(info):
"""Return true if the zipfile.ZipInfo object passed in represents a
regular file."""
return (info.external_attr >> 16) & 0o770000 == 0o100000
def ClosestFileMatch(src, tgtfiles, existing):
"""Returns the closest file match between a source file and list
of potential matches. The exact filename match is preferred,
then the sha1 is searched for, and finally a file with the same
basename is evaluated. Rename support in the updater-binary is
required for the latter checks to be used."""
result = tgtfiles.get("path:" + src.name)
if result is not None:
return result
if not OPTIONS.target_info_dict.get("update_rename_support", False):
return None
if src.size < 1000:
return None
result = tgtfiles.get("sha1:" + src.sha1)
if result is not None and existing.get(result.name) is None:
return result
result = tgtfiles.get("file:" + src.name.split("/")[-1])
if result is not None and existing.get(result.name) is None:
return result
return None
class ItemSet(object):
def __init__(self, partition, fs_config):
self.partition = partition
self.fs_config = fs_config
self.ITEMS = {}
def Get(self, name, is_dir=False):
if name not in self.ITEMS:
self.ITEMS[name] = Item(self, name, is_dir=is_dir)
return self.ITEMS[name]
def GetMetadata(self, input_zip):
# The target_files contains a record of what the uid,
# gid, and mode are supposed to be.
output = input_zip.read(self.fs_config)
for line in output.split("\n"):
if not line:
continue
columns = line.split()
name, uid, gid, mode = columns[:4]
selabel = None
capabilities = None
# After the first 4 columns, there are a series of key=value
# pairs. Extract out the fields we care about.
for element in columns[4:]:
key, value = element.split("=")
if key == "selabel":
selabel = value
if key == "capabilities":
capabilities = value
i = self.ITEMS.get(name, None)
if i is not None:
i.uid = int(uid)
i.gid = int(gid)
i.mode = int(mode, 8)
i.selabel = selabel
i.capabilities = capabilities
if i.is_dir:
i.children.sort(key=lambda i: i.name)
# Set metadata for the files generated by this script. For full recovery
# image at system/etc/recovery.img, it will be taken care by fs_config.
i = self.ITEMS.get("system/recovery-from-boot.p", None)
if i:
i.uid, i.gid, i.mode, i.selabel, i.capabilities = 0, 0, 0o644, None, None
i = self.ITEMS.get("system/etc/install-recovery.sh", None)
if i:
i.uid, i.gid, i.mode, i.selabel, i.capabilities = 0, 0, 0o544, None, None
class Item(object):
"""Items represent the metadata (user, group, mode) of files and
directories in the system image."""
def __init__(self, itemset, name, is_dir=False):
self.itemset = itemset
self.name = name
self.uid = None
self.gid = None
self.mode = None
self.selabel = None
self.capabilities = None
self.is_dir = is_dir
self.descendants = None
self.best_subtree = None
if name:
self.parent = itemset.Get(os.path.dirname(name), is_dir=True)
self.parent.children.append(self)
else:
self.parent = None
if self.is_dir:
self.children = []
def Dump(self, indent=0):
if self.uid is not None:
print "%s%s %d %d %o" % (
" " * indent, self.name, self.uid, self.gid, self.mode)
else:
print "%s%s %s %s %s" % (
" " * indent, self.name, self.uid, self.gid, self.mode)
if self.is_dir:
print "%s%s" % (" "*indent, self.descendants)
print "%s%s" % (" "*indent, self.best_subtree)
for i in self.children:
i.Dump(indent=indent+1)
def CountChildMetadata(self):
"""Count up the (uid, gid, mode, selabel, capabilities) tuples for
all children and determine the best strategy for using set_perm_recursive
and set_perm to correctly chown/chmod all the files to their desired
values. Recursively calls itself for all descendants.
Returns a dict of {(uid, gid, dmode, fmode, selabel, capabilities): count}
counting up all descendants of this node. (dmode or fmode may be None.)
Also sets the best_subtree of each directory Item to the (uid, gid, dmode,
fmode, selabel, capabilities) tuple that will match the most descendants of
that Item.
"""
assert self.is_dir
key = (self.uid, self.gid, self.mode, None, self.selabel,
self.capabilities)
self.descendants = {key: 1}
d = self.descendants
for i in self.children:
if i.is_dir:
for k, v in i.CountChildMetadata().iteritems():
d[k] = d.get(k, 0) + v
else:
k = (i.uid, i.gid, None, i.mode, i.selabel, i.capabilities)
d[k] = d.get(k, 0) + 1
# Find the (uid, gid, dmode, fmode, selabel, capabilities)
# tuple that matches the most descendants.
# First, find the (uid, gid) pair that matches the most
# descendants.
ug = {}
for (uid, gid, _, _, _, _), count in d.iteritems():
ug[(uid, gid)] = ug.get((uid, gid), 0) + count
ug = MostPopularKey(ug, (0, 0))
# Now find the dmode, fmode, selabel, and capabilities that match
# the most descendants with that (uid, gid), and choose those.
best_dmode = (0, 0o755)
best_fmode = (0, 0o644)
best_selabel = (0, None)
best_capabilities = (0, None)
for k, count in d.iteritems():
if k[:2] != ug:
continue
if k[2] is not None and count >= best_dmode[0]:
best_dmode = (count, k[2])
if k[3] is not None and count >= best_fmode[0]:
best_fmode = (count, k[3])
if k[4] is not None and count >= best_selabel[0]:
best_selabel = (count, k[4])
if k[5] is not None and count >= best_capabilities[0]:
best_capabilities = (count, k[5])
self.best_subtree = ug + (
best_dmode[1], best_fmode[1], best_selabel[1], best_capabilities[1])
return d
def SetPermissions(self, script):
"""Append set_perm/set_perm_recursive commands to 'script' to
set all permissions, users, and groups for the tree of files
rooted at 'self'."""
self.CountChildMetadata()
def recurse(item, current):
# current is the (uid, gid, dmode, fmode, selabel, capabilities) tuple
# that the current item (and all its children) have already been set to.
# We only need to issue set_perm/set_perm_recursive commands if we're
# supposed to be something different.
if item.is_dir:
if current != item.best_subtree:
script.SetPermissionsRecursive("/"+item.name, *item.best_subtree)
current = item.best_subtree
if item.uid != current[0] or item.gid != current[1] or \
item.mode != current[2] or item.selabel != current[4] or \
item.capabilities != current[5]:
script.SetPermissions("/"+item.name, item.uid, item.gid,
item.mode, item.selabel, item.capabilities)
for i in item.children:
recurse(i, current)
else:
if item.uid != current[0] or item.gid != current[1] or \
item.mode != current[3] or item.selabel != current[4] or \
item.capabilities != current[5]:
script.SetPermissions("/"+item.name, item.uid, item.gid,
item.mode, item.selabel, item.capabilities)
recurse(self, (-1, -1, -1, -1, None, None))
def CopyPartitionFiles(itemset, input_zip, output_zip=None, substitute=None):
"""Copies files for the partition in the input zip to the output
zip. Populates the Item class with their metadata, and returns a
list of symlinks. output_zip may be None, in which case the copy is
skipped (but the other side effects still happen). substitute is an
optional dict of {output filename: contents} to be output instead of
certain input files.
"""
symlinks = []
partition = itemset.partition
for info in input_zip.infolist():
prefix = partition.upper() + "/"
if info.filename.startswith(prefix):
basefilename = info.filename[len(prefix):]
if IsSymlink(info):
symlinks.append((input_zip.read(info.filename),
"/" + partition + "/" + basefilename))
else:
import copy
info2 = copy.copy(info)
fn = info2.filename = partition + "/" + basefilename
if substitute and fn in substitute and substitute[fn] is None:
continue
if not OPTIONS.ubifs:
if output_zip is not None:
if substitute and fn in substitute:
data = substitute[fn]
else:
data = input_zip.read(info.filename)
common.ZipWriteStr(output_zip, info2, data)
if fn.endswith("/"):
itemset.Get(fn[:-1], is_dir=True)
else:
itemset.Get(fn)
symlinks.sort()
return symlinks
def SignOutput(temp_zip_name, output_zip_name):
key_passwords = common.GetKeyPasswords([OPTIONS.package_key])
pw = key_passwords[OPTIONS.package_key]
common.SignFile(temp_zip_name, output_zip_name, OPTIONS.package_key, pw,
whole_file=True)
#erinlo 2013-05-30
#copy bromm_lite from /system/bin to META-INF/com/google/android/
def ModemPackage(input_zip, output_zip, modem_modify_cnt):
brom_local_path = "SYSTEM/bin/brom_lite"
try:
input_zip.open(brom_local_path)
print "modem_modify_cnt = %d" % (modem_modify_cnt)
if modem_modify_cnt > 0:
print("copy brom_lite binary")
data = input_zip.read(brom_local_path)
common.ZipWriteStr(output_zip, "META-INF/com/google/android/bromLite-binary",
data, perms=0755)
except:
print sys.exc_info()[0],sys.exc_info()[1]
def AppendAssertions(script, info_dict, oem_dict=None):
oem_props = info_dict.get("oem_fingerprint_properties")
if oem_props is None or len(oem_props) == 0:
#huangzhijian@wind-mobi.com add 20170517 start
#device = GetBuildProp("ro.product.device", info_dict)
#script.AssertDevice(device)
#huangzhijian@wind-mobi.com add 20170209 start
#name = GetBuildProp("ro.product.name", info_dict)
#script.AssertName(name)
#huangzhijian@wind-mobi.com add 20170209 end
carrier = GetBuildProp("ro.product.carrier", info_dict)
script.AssertCarrier(carrier)
#huangzhijian@wind-mobi.com add 20170517 end
else:
if oem_dict is None:
raise common.ExternalError(
"No OEM file provided to answer expected assertions")
for prop in oem_props.split():
if oem_dict.get(prop) is None:
raise common.ExternalError(
"The OEM file is missing the property %s" % prop)
script.AssertOemProperty(prop, oem_dict.get(prop))
def HasRecoveryPatch(target_files_zip):
namelist = [name for name in target_files_zip.namelist()]
return ("SYSTEM/recovery-from-boot.p" in namelist or
"SYSTEM/etc/recovery.img" in namelist)
def HasCustomPartition(target_files_zip):
try:
target_files_zip.getinfo("CUSTOM/")
return True
except KeyError:
return False
def HasVendorPartition(target_files_zip):
try:
target_files_zip.getinfo("VENDOR/")
return True
except KeyError:
return False
def GetOemProperty(name, oem_props, oem_dict, info_dict):
if oem_props is not None and name in oem_props:
return oem_dict[name]
return GetBuildProp(name, info_dict)
def CalculateFingerprint(oem_props, oem_dict, info_dict):
if oem_props is None:
return GetBuildProp("ro.build.fingerprint", info_dict)
return "%s/%s/%s:%s" % (
GetOemProperty("ro.product.brand", oem_props, oem_dict, info_dict),
GetOemProperty("ro.product.name", oem_props, oem_dict, info_dict),
GetOemProperty("ro.product.device", oem_props, oem_dict, info_dict),
GetBuildProp("ro.build.thumbprint", info_dict))
def GetImage(which, tmpdir, info_dict):
# Return an image object (suitable for passing to BlockImageDiff)
# for the 'which' partition (most be "system" or "vendor" or "custom"). If a
# prebuilt image and file map are found in tmpdir they are used,
# otherwise they are reconstructed from the individual files.
assert which in ("system", "vendor", "custom")
path = os.path.join(tmpdir, "IMAGES", which + ".img")
mappath = os.path.join(tmpdir, "IMAGES", which + ".map")
if os.path.exists(path) and os.path.exists(mappath):
print "using %s.img from target-files" % (which,)
# This is a 'new' target-files, which already has the image in it.
else:
print "building %s.img from target-files" % (which,)
# This is an 'old' target-files, which does not contain images
# already built. Build them.
mappath = tempfile.mkstemp()[1]
OPTIONS.tempfiles.append(mappath)
import add_img_to_target_files
if which == "system":
path = add_img_to_target_files.BuildSystem(
tmpdir, info_dict, block_list=mappath)
elif which == "vendor":
path = add_img_to_target_files.BuildVendor(
tmpdir, info_dict, block_list=mappath)
elif which == "custom":
path = add_img_to_target_files.BuildCustom(
tmpdir, info_dict, block_list=mappath)
# Bug: http://b/20939131
# In ext4 filesystems, block 0 might be changed even being mounted
# R/O. We add it to clobbered_blocks so that it will be written to the
# target unconditionally. Note that they are still part of care_map.
clobbered_blocks = "0"
return sparse_img.SparseImage(path, mappath, clobbered_blocks)
def WriteFullOTAPackage(input_zip, output_zip):
# TODO: how to determine this? We don't know what version it will
# be installed on top of. For now, we expect the API just won't
# change very often. Similarly for fstab, it might have changed
# in the target build.
script = edify_generator.EdifyGenerator(3, OPTIONS.info_dict)
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
recovery_mount_options = OPTIONS.info_dict.get("recovery_mount_options")
oem_dict = None
if oem_props is not None and len(oem_props) > 0:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
if not OPTIONS.oem_no_mount:
script.Mount("/oem", recovery_mount_options)
oem_dict = common.LoadDictionaryFromLines(
open(OPTIONS.oem_source).readlines())
metadata = {
"post-build": CalculateFingerprint(oem_props, oem_dict,
OPTIONS.info_dict),
"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.info_dict),
"post-timestamp": GetBuildProp("ro.build.date.utc", OPTIONS.info_dict),
}
device_specific = common.DeviceSpecificParams(
input_zip=input_zip,
input_version=OPTIONS.info_dict["recovery_api_version"],
output_zip=output_zip,
script=script,
input_tmp=OPTIONS.input_tmp,
metadata=metadata,
info_dict=OPTIONS.info_dict)
has_recovery_patch = HasRecoveryPatch(input_zip)
block_based = OPTIONS.block_based and has_recovery_patch
metadata["ota-type"] = "BLOCK" if block_based else "FILE"
if not OPTIONS.omit_prereq:
ts = GetBuildProp("ro.build.date.utc", OPTIONS.info_dict)
ts_text = GetBuildProp("ro.build.date", OPTIONS.info_dict)
script.AssertOlderBuild(ts, ts_text)
AppendAssertions(script, OPTIONS.info_dict, oem_dict)
device_specific.FullOTA_Assertions()
# Two-step package strategy (in chronological order, which is *not*
# the order in which the generated script has things):
#
# if stage is not "2/3" or "3/3":
# write recovery image to boot partition
# set stage to "2/3"
# reboot to boot partition and restart recovery
# else if stage is "2/3":
# write recovery image to recovery partition
# set stage to "3/3"
# reboot to recovery partition and restart recovery
# else:
# (stage must be "3/3")
# set stage to ""
# do normal full package installation:
# wipe and install system, boot image, etc.
# set up system to update recovery partition on first boot
# complete script normally
# (allow recovery to mark itself finished and reboot)
recovery_img = common.GetBootableImage("recovery.img", "recovery.img",
OPTIONS.input_tmp, "RECOVERY")
if OPTIONS.two_step:
if not OPTIONS.info_dict.get("multistage_support", None):
assert False, "two-step packages not supported by this build"
fs = OPTIONS.info_dict["fstab"]["/misc"]
assert fs.fs_type.upper() == "EMMC", \
"two-step packages only supported on devices with EMMC /misc partitions"
bcb_dev = {"bcb_dev": fs.device}
common.ZipWriteStr(output_zip, "recovery.img", recovery_img.data)
if OPTIONS.info_dict.get("mtk_header_support", None):
recovery_bthdr_img = common.GetBootableImage("recovery_bthdr.img", "recovery_bthdr.img",
OPTIONS.input_tmp, "RECOVERY")
common.ZipWriteStr(output_zip, "recovery_bthdr.img", recovery_bthdr_img.data)
script.AppendExtra("""
if get_stage("%(bcb_dev)s") == "2/3" then
""" % bcb_dev)
script.WriteRawImage("/recovery", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "3/3");
reboot_now("%(bcb_dev)s", "recovery");
else if get_stage("%(bcb_dev)s") == "3/3" then
""" % bcb_dev)
# Dump fingerprints
script.Print("Target: %s" % CalculateFingerprint(
oem_props, oem_dict, OPTIONS.info_dict))
device_specific.FullOTA_InstallBegin()
system_progress = 0.75
if OPTIONS.wipe_user_data:
system_progress -= 0.1
if HasVendorPartition(input_zip):
system_progress -= 0.1
if HasCustomPartition(input_zip):
system_progress -= 0.1
# Place a copy of file_contexts.bin into the OTA package which will be used
# by the recovery program.
if "selinux_fc" in OPTIONS.info_dict:
WritePolicyConfig(OPTIONS.info_dict["selinux_fc"], output_zip)
recovery_mount_options = OPTIONS.info_dict.get("recovery_mount_options")
system_items = ItemSet("system", "META/filesystem_config.txt")
script.ShowProgress(system_progress, 0)
#check if slc
mtslc_support = OPTIONS.info_dict.get("mtslc_support", "")
print "mtslc_support = " + mtslc_support
if block_based:
# Full OTA is done as an "incremental" against an empty source
# image. This has the effect of writing new data from the package
# to the entire partition, but lets us reuse the updater code that
# writes incrementals to do it.
system_tgt = GetImage("system", OPTIONS.input_tmp, OPTIONS.info_dict)
system_tgt.ResetFileMap()
system_diff = common.BlockDifference("system", system_tgt, src=None)
system_diff.WriteScript(script, output_zip)
else:
if OPTIONS.ubifs:
try:
system_img = input_zip.read("IMAGES/android.fixup.img")
except:
print "android.fixup.img not exists!!!"
common.ZipWriteStr(output_zip, "system.img", system_img)
if mtslc_support.startswith("yes"):
script.WriteSparseImageUbifs("system", "system.img")
else:
script.WriteRawImageUbifs("system", "system.img")
if not has_recovery_patch:
script.UnpackPackageDir("recovery", "/system")
symlinks = CopyPartitionFiles(system_items, input_zip, output_zip)
else:
script.FormatPartition("/system")
script.Mount("/system", recovery_mount_options)
if not has_recovery_patch:
script.UnpackPackageDir("recovery", "/system")
script.UnpackPackageDir("system", "/system")
symlinks = CopyPartitionFiles(system_items, input_zip, output_zip)
script.MakeSymlinks(symlinks)
try:
custom_size = OPTIONS.info_dict["custom_size"]
except:
custom_size = None
if custom_size is not None:
if (custom_size > 0) and (HasCustomPartition(input_zip) == True):
custom_items = ItemSet("custom", "META/custom_filesystem_config.txt")
if block_based:
custom_tgt = GetImage("custom", OPTIONS.input_tmp, OPTIONS.info_dict)
custom_tgt.ResetFileMap()
custom_diff = common.BlockDifference("custom", custom_tgt)
custom_diff.WriteScript(script, output_zip)
else:
script.FormatPartition("/custom")
script.Mount("/custom")
script.UnpackPackageDir("custom", "/custom")
symlinks = CopyPartitionFiles(custom_items, input_zip, output_zip)
script.MakeSymlinks(symlinks)
custom_items.GetMetadata(input_zip)
custom_items.Get("custom").SetPermissions(script)
boot_img = common.GetBootableImage(
"boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
if not block_based:
def output_sink(fn, data):
common.ZipWriteStr(output_zip, "recovery/" + fn, data)
system_items.Get("system/" + fn)
common.MakeRecoveryPatch(OPTIONS.input_tmp, output_sink,
recovery_img, boot_img)
system_items.GetMetadata(input_zip)
system_items.Get("system").SetPermissions(script)
if HasVendorPartition(input_zip):
vendor_items = ItemSet("vendor", "META/vendor_filesystem_config.txt")
script.ShowProgress(0.1, 0)
if block_based:
vendor_tgt = GetImage("vendor", OPTIONS.input_tmp, OPTIONS.info_dict)
vendor_tgt.ResetFileMap()
vendor_diff = common.BlockDifference("vendor", vendor_tgt)
vendor_diff.WriteScript(script, output_zip)
else:
script.FormatPartition("/vendor")
script.Mount("/vendor", recovery_mount_options)
script.UnpackPackageDir("vendor", "/vendor")
symlinks = CopyPartitionFiles(vendor_items, input_zip, output_zip)
script.MakeSymlinks(symlinks)
vendor_items.GetMetadata(input_zip)
vendor_items.Get("vendor").SetPermissions(script)
if HasCustomPartition(input_zip):
custom_items = ItemSet("custom", "META/custom_filesystem_config.txt")
script.ShowProgress(0.1, 0)
if block_based:
custom_tgt = GetImage("custom", OPTIONS.input_tmp, OPTIONS.info_dict)
custom_tgt.ResetFileMap()
custom_diff = common.BlockDifference("custom", custom_tgt)
custom_diff.WriteScript(script, output_zip)
else:
script.FormatPartition("/custom")
script.Mount("/custom")
script.UnpackPackageDir("custom", "/custom")
symlinks = CopyPartitionFiles(custom_items, input_zip, output_zip)
script.MakeSymlinks(symlinks)
custom_items.GetMetadata(input_zip)
custom_items.Get("custom").SetPermissions(script)
common.CheckSize(boot_img.data, "boot.img", OPTIONS.info_dict)
common.ZipWriteStr(output_zip, "boot.img", boot_img.data)
script.ShowProgress(0.05, 5)
script.WriteRawImage("/boot", "boot.img")
script.ShowProgress(0.2, 10)
device_specific.FullOTA_InstallEnd()
if OPTIONS.extra_script is not None:
script.AppendExtra(OPTIONS.extra_script)
script.UnmountAll()
if OPTIONS.wipe_user_data:
script.ShowProgress(0.1, 10)
script.FormatPartition("/data")
if OPTIONS.two_step:
script.AppendExtra("""
set_stage("%(bcb_dev)s", "");
""" % bcb_dev)
script.AppendExtra("else\n")
script.WriteRawImage("/boot", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "2/3");
reboot_now("%(bcb_dev)s", "");
endif;
endif;
""" % bcb_dev)
script.SetProgress(1)
script.AddToZip(input_zip, output_zip, input_path=OPTIONS.updater_binary)
metadata["ota-required-cache"] = str(script.required_cache)
WriteMetadata(metadata, output_zip)
def WritePolicyConfig(file_name, output_zip):
common.ZipWrite(output_zip, file_name, os.path.basename(file_name))
def WriteMetadata(metadata, output_zip):
common.ZipWriteStr(output_zip, "META-INF/com/android/metadata",
"".join(["%s=%s\n" % kv
for kv in sorted(metadata.iteritems())]))
def LoadPartitionFiles(z, partition):
"""Load all the files from the given partition in a given target-files
ZipFile, and return a dict of {filename: File object}."""
out = {}
prefix = partition.upper() + "/"
for info in z.infolist():
if info.filename.startswith(prefix) and not IsSymlink(info):
basefilename = info.filename[len(prefix):]
fn = partition + "/" + basefilename
data = z.read(info.filename)
out[fn] = common.File(fn, data)
return out
def GetBuildProp(prop, info_dict):
"""Return the fingerprint of the build of a given target-files info_dict."""
try:
return info_dict.get("build.prop", {})[prop]
except KeyError:
raise common.ExternalError("couldn't find %s in build.prop" % (prop,))
def AddToKnownPaths(filename, known_paths):
if filename[-1] == "/":
return
dirs = filename.split("/")[:-1]
while len(dirs) > 0:
path = "/".join(dirs)
if path in known_paths:
break
known_paths.add(path)
dirs.pop()
def WriteBlockIncrementalOTAPackage(target_zip, source_zip, output_zip):
# TODO(tbao): We should factor out the common parts between
# WriteBlockIncrementalOTAPackage() and WriteIncrementalOTAPackage().
source_version = OPTIONS.source_info_dict["recovery_api_version"]
target_version = OPTIONS.target_info_dict["recovery_api_version"]
if source_version == 0:
print ("WARNING: generating edify script for a source that "
"can't install it.")
script = edify_generator.EdifyGenerator(
source_version, OPTIONS.target_info_dict,
fstab=OPTIONS.source_info_dict["fstab"])
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
recovery_mount_options = OPTIONS.source_info_dict.get(
"recovery_mount_options")
oem_dict = None
if oem_props is not None and len(oem_props) > 0:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
if not OPTIONS.oem_no_mount:
script.Mount("/oem", recovery_mount_options)
oem_dict = common.LoadDictionaryFromLines(
open(OPTIONS.oem_source).readlines())
metadata = {
"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.source_info_dict),
"ota-type": "BLOCK",
}
post_timestamp = GetBuildProp("ro.build.date.utc", OPTIONS.target_info_dict)
pre_timestamp = GetBuildProp("ro.build.date.utc", OPTIONS.source_info_dict)
is_downgrade = long(post_timestamp) < long(pre_timestamp)
if OPTIONS.downgrade:
metadata["ota-downgrade"] = "yes"
if not is_downgrade:
raise RuntimeError("--downgrade specified but no downgrade detected: "
"pre: %s, post: %s" % (pre_timestamp, post_timestamp))
else:
if is_downgrade:
# Non-fatal here to allow generating such a package which may require
# manual work to adjust the post-timestamp. A legit use case is that we
# cut a new build C (after having A and B), but want to enfore the
# update path of A -> C -> B. Specifying --downgrade may not help since
# that would enforce a data wipe for C -> B update.
print("\nWARNING: downgrade detected: pre: %s, post: %s.\n"
"The package may not be deployed properly. "
"Try --downgrade?\n" % (pre_timestamp, post_timestamp))
metadata["post-timestamp"] = post_timestamp
device_specific = common.DeviceSpecificParams(
source_zip=source_zip,
source_version=source_version,
target_zip=target_zip,
target_version=target_version,
output_zip=output_zip,
script=script,
metadata=metadata,
info_dict=OPTIONS.source_info_dict)
source_fp = CalculateFingerprint(oem_props, oem_dict,
OPTIONS.source_info_dict)
target_fp = CalculateFingerprint(oem_props, oem_dict,
OPTIONS.target_info_dict)
metadata["pre-build"] = source_fp
metadata["post-build"] = target_fp
metadata["pre-build-incremental"] = GetBuildProp(
"ro.build.version.incremental", OPTIONS.source_info_dict)
metadata["post-build-incremental"] = GetBuildProp(
"ro.build.version.incremental", OPTIONS.target_info_dict)
source_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.source_tmp, "BOOT",
OPTIONS.source_info_dict)
target_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.target_tmp, "BOOT")
updating_boot = (not OPTIONS.two_step and
(source_boot.data != target_boot.data))
target_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.target_tmp, "RECOVERY")
system_src = GetImage("system", OPTIONS.source_tmp, OPTIONS.source_info_dict)
system_tgt = GetImage("system", OPTIONS.target_tmp, OPTIONS.target_info_dict)
blockimgdiff_version = 1
if OPTIONS.info_dict:
blockimgdiff_version = max(
int(i) for i in
OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
# Check first block of system partition for remount R/W only if
# disk type is ext4
system_partition = OPTIONS.source_info_dict["fstab"]["/system"]
check_first_block = system_partition.fs_type == "ext4"
# Disable using imgdiff for squashfs. 'imgdiff -z' expects input files to be
# in zip formats. However with squashfs, a) all files are compressed in LZ4;
# b) the blocks listed in block map may not contain all the bytes for a given
# file (because they're rounded to be 4K-aligned).
disable_imgdiff = system_partition.fs_type == "squashfs"
system_diff = common.BlockDifference("system", system_tgt, system_src,
check_first_block,
version=blockimgdiff_version,
disable_imgdiff=disable_imgdiff)
if HasVendorPartition(target_zip):
if not HasVendorPartition(source_zip):
raise RuntimeError("can't generate incremental that adds /vendor")
vendor_src = GetImage("vendor", OPTIONS.source_tmp,
OPTIONS.source_info_dict)
vendor_tgt = GetImage("vendor", OPTIONS.target_tmp,
OPTIONS.target_info_dict)
# Check first block of vendor partition for remount R/W only if
# disk type is ext4
vendor_partition = OPTIONS.source_info_dict["fstab"]["/vendor"]
check_first_block = vendor_partition.fs_type == "ext4"
disable_imgdiff = vendor_partition.fs_type == "squashfs"
vendor_diff = common.BlockDifference("vendor", vendor_tgt, vendor_src,
check_first_block,
version=blockimgdiff_version,
disable_imgdiff=disable_imgdiff)
else:
vendor_diff = None
if HasCustomPartition(target_zip):
if not HasCustomPartition(source_zip):
raise RuntimeError("can't generate incremental that adds /custom")
custom_src = GetImage("custom", OPTIONS.source_tmp, OPTIONS.source_info_dict)
custom_tgt = GetImage("custom", OPTIONS.target_tmp, OPTIONS.target_info_dict)
custom_diff = common.BlockDifference("custom", custom_tgt, custom_src,
version=blockimgdiff_version)
else:
custom_diff = None
AppendAssertions(script, OPTIONS.target_info_dict, oem_dict)
device_specific.IncrementalOTA_Assertions()
# Two-step incremental package strategy (in chronological order,
# which is *not* the order in which the generated script has
# things):
#
# if stage is not "2/3" or "3/3":
# do verification on current system
# write recovery image to boot partition
# set stage to "2/3"
# reboot to boot partition and restart recovery
# else if stage is "2/3":
# write recovery image to recovery partition
# set stage to "3/3"
# reboot to recovery partition and restart recovery
# else:
# (stage must be "3/3")
# perform update:
# patch system files, etc.
# force full install of new boot image
# set up system to update recovery partition on first boot
# complete script normally
# (allow recovery to mark itself finished and reboot)
if OPTIONS.two_step:
if not OPTIONS.info_dict.get("multistage_support", None):
assert False, "two-step packages not supported by this build"
fs = OPTIONS.info_dict["fstab"]["/misc"]
assert fs.fs_type.upper() == "EMMC", \
"two-step packages only supported on devices with EMMC /misc partitions"
bcb_dev = {"bcb_dev": fs.device}
common.ZipWriteStr(output_zip, "recovery.img", target_recovery.data)
if OPTIONS.info_dict.get("mtk_header_support", None):
target_recovery_bthdr = common.GetBootableImage(
"/tmp/recovery_bthdr.img", "recovery_bthdr.img", OPTIONS.target_tmp, "RECOVERY")
common.ZipWriteStr(output_zip, "recovery_bthdr.img", target_recovery_bthdr.data)
script.AppendExtra("""
if get_stage("%(bcb_dev)s") == "2/3" then
""" % bcb_dev)
script.AppendExtra("sleep(20);\n")
script.WriteRawImage("/recovery", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "3/3");
reboot_now("%(bcb_dev)s", "recovery");
else if get_stage("%(bcb_dev)s") != "3/3" then
""" % bcb_dev)
# Dump fingerprints
script.Print("Source: %s" % CalculateFingerprint(
oem_props, oem_dict, OPTIONS.source_info_dict))
script.Print("Target: %s" % CalculateFingerprint(
oem_props, oem_dict, OPTIONS.target_info_dict))
script.Print("Verifying current system...")
device_specific.IncrementalOTA_VerifyBegin()
if oem_props is None:
# When blockimgdiff version is less than 3 (non-resumable block-based OTA),
# patching on a device that's already on the target build will damage the
# system. Because operations like move don't check the block state, they
# always apply the changes unconditionally.
if blockimgdiff_version <= 2:
script.AssertSomeFingerprint(source_fp)
else:
script.AssertSomeFingerprint(source_fp, target_fp)
else:
if blockimgdiff_version <= 2:
script.AssertSomeThumbprint(
GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
else:
script.AssertSomeThumbprint(
GetBuildProp("ro.build.thumbprint", OPTIONS.target_info_dict),
GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
# Check the required cache size (i.e. stashed blocks).
size = []
if system_diff:
size.append(system_diff.required_cache)
if vendor_diff:
size.append(vendor_diff.required_cache)
if updating_boot:
boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)
d = common.Difference(target_boot, source_boot)
_, _, d = d.ComputePatch()
if d is None:
include_full_boot = True
common.ZipWriteStr(output_zip, "boot.img", target_boot.data)
else:
include_full_boot = False
print "boot target: %d source: %d diff: %d" % (
target_boot.size, source_boot.size, len(d))
common.ZipWriteStr(output_zip, "patch/boot.img.p", d)
script.PatchCheck("%s:%s:%d:%s:%d:%s" %
(boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1))
size.append(target_boot.size)
if size:
script.CacheFreeSpaceCheck(max(size))
device_specific.IncrementalOTA_VerifyEnd()
if OPTIONS.two_step:
script.WriteRawImage("/boot", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "2/3");
reboot_now("%(bcb_dev)s", "");
else
""" % bcb_dev)
# Verify the existing partitions.
system_diff.WriteVerifyScript(script, touched_blocks_only=True)
if vendor_diff:
vendor_diff.WriteVerifyScript(script, touched_blocks_only=True)
script.Comment("---- start making changes here ----")
device_specific.IncrementalOTA_InstallBegin()
system_diff.WriteScript(script, output_zip,
progress=0.8 if vendor_diff else 0.9)
if vendor_diff:
vendor_diff.WriteScript(script, output_zip, progress=0.1)
if custom_diff:
custom_diff.WriteScript(script, output_zip, progress=0.1)
if OPTIONS.two_step:
common.ZipWriteStr(output_zip, "boot.img", target_boot.data)
script.WriteRawImage("/boot", "boot.img")
print "writing full boot image (forced by two-step mode)"
if not OPTIONS.two_step:
if updating_boot:
if include_full_boot:
print "boot image changed; including full."
script.Print("Installing boot image...")
script.WriteRawImage("/boot", "boot.img")
else:
# Produce the boot image by applying a patch to the current
# contents of the boot partition, and write it back to the
# partition.
print "boot image changed; including patch."
script.Print("Patching boot image...")
script.ShowProgress(0.1, 10)
script.ApplyPatch("%s:%s:%d:%s:%d:%s"
% (boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1),
"-",
target_boot.size, target_boot.sha1,
source_boot.sha1, "patch/boot.img.p")
else:
print "boot image unchanged; skipping."
# Do device-specific installation (eg, write radio image).
device_specific.IncrementalOTA_InstallEnd()
if OPTIONS.extra_script is not None:
script.AppendExtra(OPTIONS.extra_script)
if OPTIONS.wipe_user_data:
script.Print("Erasing user data...")
script.FormatPartition("/data")
metadata["ota-wipe"] = "yes"
if OPTIONS.two_step:
script.AppendExtra("""
set_stage("%(bcb_dev)s", "");
endif;
endif;
""" % bcb_dev)
script.SetProgress(1)
# For downgrade OTAs, we prefer to use the update-binary in the source
# build that is actually newer than the one in the target build.
if OPTIONS.downgrade:
script.AddToZip(source_zip, output_zip, input_path=OPTIONS.updater_binary)
else:
script.AddToZip(target_zip, output_zip, input_path=OPTIONS.updater_binary)
metadata["ota-required-cache"] = str(script.required_cache)
WriteMetadata(metadata, output_zip)
def WriteVerifyPackage(input_zip, output_zip):
script = edify_generator.EdifyGenerator(3, OPTIONS.info_dict)
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
recovery_mount_options = OPTIONS.info_dict.get(
"recovery_mount_options")
oem_dict = None
if oem_props is not None and len(oem_props) > 0:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
script.Mount("/oem", recovery_mount_options)
oem_dict = common.LoadDictionaryFromLines(
open(OPTIONS.oem_source).readlines())
target_fp = CalculateFingerprint(oem_props, oem_dict, OPTIONS.info_dict)
metadata = {
"post-build": target_fp,
"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.info_dict),
"post-timestamp": GetBuildProp("ro.build.date.utc", OPTIONS.info_dict),
}
device_specific = common.DeviceSpecificParams(
input_zip=input_zip,
input_version=OPTIONS.info_dict["recovery_api_version"],
output_zip=output_zip,
script=script,
input_tmp=OPTIONS.input_tmp,
metadata=metadata,
info_dict=OPTIONS.info_dict)
AppendAssertions(script, OPTIONS.info_dict, oem_dict)
script.Print("Verifying device images against %s..." % target_fp)
script.AppendExtra("")
script.Print("Verifying boot...")
boot_img = common.GetBootableImage(
"boot.img", "boot.img", OPTIONS.input_tmp, "BOOT")
boot_type, boot_device = common.GetTypeAndDevice(
"/boot", OPTIONS.info_dict)
script.Verify("%s:%s:%d:%s" % (
boot_type, boot_device, boot_img.size, boot_img.sha1))
script.AppendExtra("")
script.Print("Verifying recovery...")
recovery_img = common.GetBootableImage(
"recovery.img", "recovery.img", OPTIONS.input_tmp, "RECOVERY")
recovery_type, recovery_device = common.GetTypeAndDevice(
"/recovery", OPTIONS.info_dict)
script.Verify("%s:%s:%d:%s" % (
recovery_type, recovery_device, recovery_img.size, recovery_img.sha1))
script.AppendExtra("")
system_tgt = GetImage("system", OPTIONS.input_tmp, OPTIONS.info_dict)
system_tgt.ResetFileMap()
system_diff = common.BlockDifference("system", system_tgt, src=None)
system_diff.WriteStrictVerifyScript(script)
if HasVendorPartition(input_zip):
vendor_tgt = GetImage("vendor", OPTIONS.input_tmp, OPTIONS.info_dict)
vendor_tgt.ResetFileMap()
vendor_diff = common.BlockDifference("vendor", vendor_tgt, src=None)
vendor_diff.WriteStrictVerifyScript(script)
# Device specific partitions, such as radio, bootloader and etc.
device_specific.VerifyOTA_Assertions()
script.SetProgress(1.0)
script.AddToZip(input_zip, output_zip, input_path=OPTIONS.updater_binary)
metadata["ota-required-cache"] = str(script.required_cache)
WriteMetadata(metadata, output_zip)
def WriteABOTAPackageWithBrilloScript(target_file, output_file,
source_file=None):
"""Generate an Android OTA package that has A/B update payload."""
# Setup signing keys.
if OPTIONS.package_key is None:
OPTIONS.package_key = OPTIONS.info_dict.get(
"default_system_dev_certificate",
"build/target/product/security/testkey")
# A/B updater expects key in RSA format.
cmd = ["openssl", "pkcs8",
"-in", OPTIONS.package_key + OPTIONS.private_key_suffix,
"-inform", "DER", "-nocrypt"]
rsa_key = common.MakeTempFile(prefix="key-", suffix=".key")
cmd.extend(["-out", rsa_key])
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "openssl pkcs8 failed"
# Stage the output zip package for signing.
temp_zip_file = tempfile.NamedTemporaryFile()
output_zip = zipfile.ZipFile(temp_zip_file, "w",
compression=zipfile.ZIP_DEFLATED)
# Metadata to comply with Android OTA package format.
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties", None)
oem_dict = None
if oem_props:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
oem_dict = common.LoadDictionaryFromLines(
open(OPTIONS.oem_source).readlines())
metadata = {
"post-build": CalculateFingerprint(oem_props, oem_dict,
OPTIONS.info_dict),
"post-build-incremental" : GetBuildProp("ro.build.version.incremental",
OPTIONS.info_dict),
"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.info_dict),
"post-timestamp": GetBuildProp("ro.build.date.utc", OPTIONS.info_dict),
"ota-required-cache": "0",
"ota-type": "AB",
}
if source_file is not None:
metadata["pre-build"] = CalculateFingerprint(oem_props, oem_dict,
OPTIONS.source_info_dict)
metadata["pre-build-incremental"] = GetBuildProp(
"ro.build.version.incremental", OPTIONS.source_info_dict)
# 1. Generate payload.
payload_file = common.MakeTempFile(prefix="payload-", suffix=".bin")
cmd = ["brillo_update_payload", "generate",
"--payload", payload_file,
"--target_image", target_file]
if source_file is not None:
cmd.extend(["--source_image", source_file])
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "brillo_update_payload generate failed"
# 2. Generate hashes of the payload and metadata files.
payload_sig_file = common.MakeTempFile(prefix="sig-", suffix=".bin")
metadata_sig_file = common.MakeTempFile(prefix="sig-", suffix=".bin")
cmd = ["brillo_update_payload", "hash",
"--unsigned_payload", payload_file,
"--signature_size", "256",
"--metadata_hash_file", metadata_sig_file,
"--payload_hash_file", payload_sig_file]
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "brillo_update_payload hash failed"
# 3. Sign the hashes and insert them back into the payload file.
signed_payload_sig_file = common.MakeTempFile(prefix="signed-sig-",
suffix=".bin")
signed_metadata_sig_file = common.MakeTempFile(prefix="signed-sig-",
suffix=".bin")
# 3a. Sign the payload hash.
cmd = ["openssl", "pkeyutl", "-sign",
"-inkey", rsa_key,
"-pkeyopt", "digest:sha256",
"-in", payload_sig_file,
"-out", signed_payload_sig_file]
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "openssl sign payload failed"
# 3b. Sign the metadata hash.
cmd = ["openssl", "pkeyutl", "-sign",
"-inkey", rsa_key,
"-pkeyopt", "digest:sha256",
"-in", metadata_sig_file,
"-out", signed_metadata_sig_file]
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "openssl sign metadata failed"
# 3c. Insert the signatures back into the payload file.
signed_payload_file = common.MakeTempFile(prefix="signed-payload-",
suffix=".bin")
cmd = ["brillo_update_payload", "sign",
"--unsigned_payload", payload_file,
"--payload", signed_payload_file,
"--signature_size", "256",
"--metadata_signature_file", signed_metadata_sig_file,
"--payload_signature_file", signed_payload_sig_file]
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "brillo_update_payload sign failed"
# 4. Dump the signed payload properties.
properties_file = common.MakeTempFile(prefix="payload-properties-",
suffix=".txt")
cmd = ["brillo_update_payload", "properties",
"--payload", signed_payload_file,
"--properties_file", properties_file]
p1 = common.Run(cmd, stdout=subprocess.PIPE)
p1.wait()
assert p1.returncode == 0, "brillo_update_payload properties failed"
# Add the signed payload file and properties into the zip.
common.ZipWrite(output_zip, properties_file, arcname="payload_properties.txt")
common.ZipWrite(output_zip, signed_payload_file, arcname="payload.bin",
compress_type=zipfile.ZIP_STORED)
WriteMetadata(metadata, output_zip)
# Sign the whole package to comply with the Android OTA package format.
common.ZipClose(output_zip)
SignOutput(temp_zip_file.name, output_file)
temp_zip_file.close()
class FileDifference(object):
def __init__(self, partition, source_zip, target_zip, output_zip):
self.deferred_patch_list = None
print "Loading target..."
self.target_data = target_data = LoadPartitionFiles(target_zip, partition)
print "Loading source..."
self.source_data = source_data = LoadPartitionFiles(source_zip, partition)
self.verbatim_targets = verbatim_targets = []
self.patch_list = patch_list = []
diffs = []
self.renames = renames = {}
known_paths = set()
largest_source_size = 0
matching_file_cache = {}
for fn, sf in source_data.items():
assert fn == sf.name
matching_file_cache["path:" + fn] = sf
if fn in target_data.keys():
AddToKnownPaths(fn, known_paths)
# Only allow eligibility for filename/sha matching
# if there isn't a perfect path match.
if target_data.get(sf.name) is None:
matching_file_cache["file:" + fn.split("/")[-1]] = sf
matching_file_cache["sha:" + sf.sha1] = sf
for fn in sorted(target_data.keys()):
tf = target_data[fn]
assert fn == tf.name
sf = ClosestFileMatch(tf, matching_file_cache, renames)
if sf is not None and sf.name != tf.name:
print "File has moved from " + sf.name + " to " + tf.name
renames[sf.name] = tf
if sf is None or fn in OPTIONS.require_verbatim:
# This file should be included verbatim
if fn in OPTIONS.prohibit_verbatim:
raise common.ExternalError("\"%s\" must be sent verbatim" % (fn,))
print "send", fn, "verbatim"
tf.AddToZip(output_zip)
verbatim_targets.append((fn, tf.size, tf.sha1))
if fn in target_data.keys():
AddToKnownPaths(fn, known_paths)
elif tf.sha1 != sf.sha1:
# File is different; consider sending as a patch
diffs.append(common.Difference(tf, sf))
else:
# Target file data identical to source (may still be renamed)
pass
common.ComputeDifferences(diffs)
#wschen 2013-05-31
try:
cache_size = OPTIONS.target_info_dict["cache_size"]
except:
cache_size = None
for diff in diffs:
tf, sf, d = diff.GetPatch()
path = "/".join(tf.name.split("/")[:-1])
if d is None or len(d) > tf.size * OPTIONS.patch_threshold or (cache_size is not None and (sf.size > (cache_size * OPTIONS.patch_threshold))) or \
path not in known_paths:
# patch is almost as big as the file; don't bother patching
# or a patch + rename cannot take place due to the target
# directory not existing
tf.AddToZip(output_zip)
verbatim_targets.append((tf.name, tf.size, tf.sha1))
if sf.name in renames:
del renames[sf.name]
AddToKnownPaths(tf.name, known_paths)
else:
common.ZipWriteStr(output_zip, "patch/" + sf.name + ".p", d)
patch_list.append((tf, sf, tf.size, common.sha1(d).hexdigest()))
largest_source_size = max(largest_source_size, sf.size)
self.largest_source_size = largest_source_size
def EmitVerification(self, script):
so_far = 0
for tf, sf, _, _ in self.patch_list:
if tf.name != sf.name:
script.SkipNextActionIfTargetExists(tf.name, tf.sha1)
script.PatchCheck("/"+sf.name, tf.sha1, sf.sha1)
so_far += sf.size
return so_far
def EmitExplicitTargetVerification(self, script):
for fn, _, sha1 in self.verbatim_targets:
if fn[-1] != "/":
script.FileCheck("/"+fn, sha1)
for tf, _, _, _ in self.patch_list:
script.FileCheck(tf.name, tf.sha1)
def RemoveUnneededFiles(self, script, extras=()):
file_list = ["/" + i[0] for i in self.verbatim_targets]
file_list += ["/" + i for i in self.source_data
if i not in self.target_data and i not in self.renames]
file_list += list(extras)
# Sort the list in descending order, which removes all the files first
# before attempting to remove the folder. (Bug: 22960996)
script.DeleteFiles(sorted(file_list, reverse=True))
def TotalPatchSize(self):
return sum(i[1].size for i in self.patch_list)
def EmitPatches(self, script, total_patch_size, so_far):
self.deferred_patch_list = deferred_patch_list = []
for item in self.patch_list:
tf, sf, _, _ = item
if tf.name == "system/build.prop":
deferred_patch_list.append(item)
continue
if sf.name != tf.name:
script.SkipNextActionIfTargetExists(tf.name, tf.sha1)
script.ApplyPatch("/" + sf.name, "-", tf.size, tf.sha1, sf.sha1,
"patch/" + sf.name + ".p")
so_far += tf.size
script.SetProgress(so_far / total_patch_size)
return so_far
def EmitDeferredPatches(self, script):
for item in self.deferred_patch_list:
tf, sf, _, _ = item
script.ApplyPatch("/"+sf.name, "-", tf.size, tf.sha1, sf.sha1,
"patch/" + sf.name + ".p")
script.SetPermissions("/system/build.prop", 0, 0, 0o644, None, None)
def EmitRenames(self, script):
if len(self.renames) > 0:
script.Print("Renaming files...")
for src, tgt in self.renames.iteritems():
#wschen 2014-04-29 if patched is using replace then del the original file and not to rename it
skip_rename = False
if self.verbatim_targets:
for i in self.verbatim_targets:
if i[0] == self.renames[src].name:
skip_rename = True
if skip_rename is False:
print "Renaming " + src + " to " + tgt.name
script.RenameFile(src, tgt.name)
else:
print self.renames[src].name + " is using replace and not to rename"
script.DeleteFiles(["/" + src])
def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
target_has_recovery_patch = HasRecoveryPatch(target_zip)
source_has_recovery_patch = HasRecoveryPatch(source_zip)
if (OPTIONS.block_based and
target_has_recovery_patch and
source_has_recovery_patch):
return WriteBlockIncrementalOTAPackage(target_zip, source_zip, output_zip)
source_version = OPTIONS.source_info_dict["recovery_api_version"]
target_version = OPTIONS.target_info_dict["recovery_api_version"]
if source_version == 0:
print ("WARNING: generating edify script for a source that "
"can't install it.")
script = edify_generator.EdifyGenerator(
source_version, OPTIONS.target_info_dict,
fstab=OPTIONS.source_info_dict["fstab"])
oem_props = OPTIONS.info_dict.get("oem_fingerprint_properties")
recovery_mount_options = OPTIONS.source_info_dict.get(
"recovery_mount_options")
oem_dict = None
if oem_props is not None and len(oem_props) > 0:
if OPTIONS.oem_source is None:
raise common.ExternalError("OEM source required for this build")
if not OPTIONS.oem_no_mount:
script.Mount("/oem", recovery_mount_options)
oem_dict = common.LoadDictionaryFromLines(
open(OPTIONS.oem_source).readlines())
metadata = {
"pre-device": GetOemProperty("ro.product.device", oem_props, oem_dict,
OPTIONS.source_info_dict),
"ota-type": "FILE",
}
post_timestamp = GetBuildProp("ro.build.date.utc", OPTIONS.target_info_dict)
pre_timestamp = GetBuildProp("ro.build.date.utc", OPTIONS.source_info_dict)
is_downgrade = long(post_timestamp) < long(pre_timestamp)
if OPTIONS.downgrade:
metadata["ota-downgrade"] = "yes"
if not is_downgrade:
raise RuntimeError("--downgrade specified but no downgrade detected: "
"pre: %s, post: %s" % (pre_timestamp, post_timestamp))
else:
if is_downgrade:
# Non-fatal here to allow generating such a package which may require
# manual work to adjust the post-timestamp. A legit use case is that we
# cut a new build C (after having A and B), but want to enfore the
# update path of A -> C -> B. Specifying --downgrade may not help since
# that would enforce a data wipe for C -> B update.
print("\nWARNING: downgrade detected: pre: %s, post: %s.\n"
"The package may not be deployed properly. "
"Try --downgrade?\n" % (pre_timestamp, post_timestamp))
metadata["post-timestamp"] = post_timestamp
device_specific = common.DeviceSpecificParams(
source_zip=source_zip,
source_version=source_version,
target_zip=target_zip,
target_version=target_version,
output_zip=output_zip,
script=script,
metadata=metadata,
info_dict=OPTIONS.source_info_dict)
system_diff = FileDifference("system", source_zip, target_zip, output_zip)
script.Mount("/system", recovery_mount_options)
if HasVendorPartition(target_zip):
vendor_diff = FileDifference("vendor", source_zip, target_zip, output_zip)
script.Mount("/vendor", recovery_mount_options)
else:
vendor_diff = None
if HasCustomPartition(target_zip):
custom_diff = FileDifference("custom", source_zip, target_zip, output_zip)
script.Mount("/custom")
else:
custom_diff = None
target_fp = CalculateFingerprint(oem_props, oem_dict,
OPTIONS.target_info_dict)
source_fp = CalculateFingerprint(oem_props, oem_dict,
OPTIONS.source_info_dict)
if oem_props is None:
script.AssertSomeFingerprint(source_fp, target_fp)
else:
script.AssertSomeThumbprint(
GetBuildProp("ro.build.thumbprint", OPTIONS.target_info_dict),
GetBuildProp("ro.build.thumbprint", OPTIONS.source_info_dict))
metadata["pre-build"] = source_fp
metadata["post-build"] = target_fp
metadata["pre-build-incremental"] = GetBuildProp(
"ro.build.version.incremental", OPTIONS.source_info_dict)
metadata["post-build-incremental"] = GetBuildProp(
"ro.build.version.incremental", OPTIONS.target_info_dict)
source_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.source_tmp, "BOOT",
OPTIONS.source_info_dict)
target_boot = common.GetBootableImage(
"/tmp/boot.img", "boot.img", OPTIONS.target_tmp, "BOOT")
updating_boot = (not OPTIONS.two_step and
(source_boot.data != target_boot.data))
source_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.source_tmp, "RECOVERY",
OPTIONS.source_info_dict)
target_recovery = common.GetBootableImage(
"/tmp/recovery.img", "recovery.img", OPTIONS.target_tmp, "RECOVERY")
updating_recovery = (source_recovery.data != target_recovery.data)
# Here's how we divide up the progress bar:
# 0.1 for verifying the start state (PatchCheck calls)
# 0.8 for applying patches (ApplyPatch calls)
# 0.1 for unpacking verbatim files, symlinking, and doing the
# device-specific commands.
AppendAssertions(script, OPTIONS.target_info_dict, oem_dict)
device_specific.IncrementalOTA_Assertions()
# Two-step incremental package strategy (in chronological order,
# which is *not* the order in which the generated script has
# things):
#
# if stage is not "2/3" or "3/3":
# do verification on current system
# write recovery image to boot partition
# set stage to "2/3"
# reboot to boot partition and restart recovery
# else if stage is "2/3":
# write recovery image to recovery partition
# set stage to "3/3"
# reboot to recovery partition and restart recovery
# else:
# (stage must be "3/3")
# perform update:
# patch system files, etc.
# force full install of new boot image
# set up system to update recovery partition on first boot
# complete script normally
# (allow recovery to mark itself finished and reboot)
if OPTIONS.two_step:
if not OPTIONS.info_dict.get("multistage_support", None):
assert False, "two-step packages not supported by this build"
fs = OPTIONS.info_dict["fstab"]["/misc"]
assert fs.fs_type.upper() == "EMMC", \
"two-step packages only supported on devices with EMMC /misc partitions"
bcb_dev = {"bcb_dev": fs.device}
common.ZipWriteStr(output_zip, "recovery.img", target_recovery.data)
if OPTIONS.info_dict.get("mtk_header_support", None):
target_recovery_bthdr = common.GetBootableImage(
"/tmp/recovery_bthdr.img", "recovery_bthdr.img", OPTIONS.target_tmp, "RECOVERY")
common.ZipWriteStr(output_zip, "recovery_bthdr.img", target_recovery_bthdr.data)
script.AppendExtra("""
if get_stage("%(bcb_dev)s") == "2/3" then
""" % bcb_dev)
script.AppendExtra("sleep(20);\n")
script.WriteRawImage("/recovery", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "3/3");
reboot_now("%(bcb_dev)s", "recovery");
else if get_stage("%(bcb_dev)s") != "3/3" then
""" % bcb_dev)
# Dump fingerprints
script.Print("Source: %s" % (source_fp,))
script.Print("Target: %s" % (target_fp,))
script.Print("Verifying current system...")
device_specific.IncrementalOTA_VerifyBegin()
script.ShowProgress(0.1, 0)
so_far = system_diff.EmitVerification(script)
if vendor_diff:
so_far += vendor_diff.EmitVerification(script)
if custom_diff:
so_far += custom_diff.EmitVerification(script)
size = []
if system_diff.patch_list:
size.append(system_diff.largest_source_size)
if vendor_diff:
if vendor_diff.patch_list:
size.append(vendor_diff.largest_source_size)
if custom_diff:
if custom_diff.patch_list:
size.append(custom_diff.largest_source_size)
if updating_boot:
d = common.Difference(target_boot, source_boot)
_, _, d = d.ComputePatch()
print "boot target: %d source: %d diff: %d" % (
target_boot.size, source_boot.size, len(d))
common.ZipWriteStr(output_zip, "patch/boot.img.p", d)
boot_type, boot_device = common.GetTypeAndDevice("/boot", OPTIONS.info_dict)
script.PatchCheck("%s:%s:%d:%s:%d:%s" %
(boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1))
so_far += source_boot.size
size.append(target_boot.size)
if size:
script.CacheFreeSpaceCheck(max(size))
device_specific.IncrementalOTA_VerifyEnd()
if OPTIONS.two_step:
script.WriteRawImage("/boot", "recovery.img")
script.AppendExtra("""
set_stage("%(bcb_dev)s", "2/3");
reboot_now("%(bcb_dev)s", "");
else
""" % bcb_dev)
script.Comment("---- start making changes here ----")
device_specific.IncrementalOTA_InstallBegin()
if OPTIONS.two_step:
common.ZipWriteStr(output_zip, "boot.img", target_boot.data)
script.WriteRawImage("/boot", "boot.img")
print "writing full boot image (forced by two-step mode)"
script.Print("Removing unneeded files...")
system_diff.RemoveUnneededFiles(script, ("/system/recovery.img",))
if vendor_diff:
vendor_diff.RemoveUnneededFiles(script)
if custom_diff:
custom_diff.RemoveUnneededFiles(script)
script.ShowProgress(0.8, 0)
total_patch_size = 1.0 + system_diff.TotalPatchSize()
if vendor_diff:
total_patch_size += vendor_diff.TotalPatchSize()
if custom_diff:
total_patch_size += custom_diff.TotalPatchSize()
if updating_boot:
total_patch_size += target_boot.size
script.Print("Patching system files...")
so_far = system_diff.EmitPatches(script, total_patch_size, 0)
if vendor_diff:
script.Print("Patching vendor files...")
so_far = vendor_diff.EmitPatches(script, total_patch_size, so_far)
if custom_diff:
script.Print("Patching custom files...")
so_far = custom_diff.EmitPatches(script, total_patch_size, so_far)
if not OPTIONS.two_step:
if updating_boot:
# Produce the boot image by applying a patch to the current
# contents of the boot partition, and write it back to the
# partition.
script.Print("Patching boot image...")
script.ApplyPatch("%s:%s:%d:%s:%d:%s"
% (boot_type, boot_device,
source_boot.size, source_boot.sha1,
target_boot.size, target_boot.sha1),
"-",
target_boot.size, target_boot.sha1,
source_boot.sha1, "patch/boot.img.p")
so_far += target_boot.size
script.SetProgress(so_far / total_patch_size)
print "boot image changed; including."
else:
print "boot image unchanged; skipping."
system_items = ItemSet("system", "META/filesystem_config.txt")
if vendor_diff:
vendor_items = ItemSet("vendor", "META/vendor_filesystem_config.txt")
if custom_diff:
custom_items = ItemSet("custom", "META/custom_filesystem_config.txt")
if updating_recovery:
# Recovery is generated as a patch using both the boot image
# (which contains the same linux kernel as recovery) and the file
# /system/etc/recovery-resource.dat (which contains all the images
# used in the recovery UI) as sources. This lets us minimize the
# size of the patch, which must be included in every OTA package.
#
# For older builds where recovery-resource.dat is not present, we
# use only the boot image as the source.
if not target_has_recovery_patch:
def output_sink(fn, data):
common.ZipWriteStr(output_zip, "recovery/" + fn, data)
system_items.Get("system/" + fn)
common.MakeRecoveryPatch(OPTIONS.target_tmp, output_sink,
target_recovery, target_boot)
script.DeleteFiles(["/system/recovery-from-boot.p",
"/system/etc/recovery.img",
"/system/etc/install-recovery.sh"])
print "recovery image changed; including as patch from boot."
else:
print "recovery image unchanged; skipping."
script.ShowProgress(0.1, 10)
target_symlinks = CopyPartitionFiles(system_items, target_zip, None)
if vendor_diff:
target_symlinks.extend(CopyPartitionFiles(vendor_items, target_zip, None))
if custom_diff:
target_symlinks.extend(CopyPartitionFiles(custom_items, target_zip, None))
temp_script = script.MakeTemporary()
system_items.GetMetadata(target_zip)
system_items.Get("system").SetPermissions(temp_script)
if vendor_diff:
vendor_items.GetMetadata(target_zip)
vendor_items.Get("vendor").SetPermissions(temp_script)
if custom_diff:
custom_items.GetMetadata(target_zip)
custom_items.Get("custom").SetPermissions(temp_script)
# Note that this call will mess up the trees of Items, so make sure
# we're done with them.
source_symlinks = CopyPartitionFiles(system_items, source_zip, None)
if vendor_diff:
source_symlinks.extend(CopyPartitionFiles(vendor_items, source_zip, None))
if custom_diff:
source_symlinks.extend(CopyPartitionFiles(custom_items, source_zip, None))
target_symlinks_d = dict([(i[1], i[0]) for i in target_symlinks])
source_symlinks_d = dict([(i[1], i[0]) for i in source_symlinks])
# Delete all the symlinks in source that aren't in target. This
# needs to happen before verbatim files are unpacked, in case a
# symlink in the source is replaced by a real file in the target.
# If a symlink in the source will be replaced by a regular file, we cannot
# delete the symlink/file in case the package gets applied again. For such
# a symlink, we prepend a sha1_check() to detect if it has been updated.
# (Bug: 23646151)
replaced_symlinks = dict()
if system_diff:
for i in system_diff.verbatim_targets:
replaced_symlinks["/%s" % (i[0],)] = i[2]
if vendor_diff:
for i in vendor_diff.verbatim_targets:
replaced_symlinks["/%s" % (i[0],)] = i[2]
if system_diff:
for tf in system_diff.renames.values():
replaced_symlinks["/%s" % (tf.name,)] = tf.sha1
if vendor_diff:
for tf in vendor_diff.renames.values():
replaced_symlinks["/%s" % (tf.name,)] = tf.sha1
always_delete = []
may_delete = []
for dest, link in source_symlinks:
if link not in target_symlinks_d:
if link in replaced_symlinks:
may_delete.append((link, replaced_symlinks[link]))
else:
always_delete.append(link)
script.DeleteFiles(always_delete)
script.DeleteFilesIfNotMatching(may_delete)
if system_diff.verbatim_targets:
script.Print("Unpacking new system files...")
script.UnpackPackageDir("system", "/system")
if vendor_diff and vendor_diff.verbatim_targets:
script.Print("Unpacking new vendor files...")
script.UnpackPackageDir("vendor", "/vendor")
if custom_diff and custom_diff.verbatim_targets:
script.Print("Unpacking new custom files...")
script.UnpackPackageDir("custom", "/custom")
if updating_recovery and not target_has_recovery_patch:
script.Print("Unpacking new recovery...")
script.UnpackPackageDir("recovery", "/system")
system_diff.EmitRenames(script)
if vendor_diff:
vendor_diff.EmitRenames(script)
if custom_diff:
custom_diff.EmitRenames(script)
script.Print("Symlinks and permissions...")
# Create all the symlinks that don't already exist, or point to
# somewhere different than what we want. Delete each symlink before
# creating it, since the 'symlink' command won't overwrite.
to_create = []
for dest, link in target_symlinks:
if link in source_symlinks_d:
if dest != source_symlinks_d[link]:
to_create.append((dest, link))
else:
to_create.append((dest, link))
script.DeleteFiles([i[1] for i in to_create])
script.MakeSymlinks(to_create)
# Now that the symlinks are created, we can set all the
# permissions.
script.AppendScript(temp_script)
# Do device-specific installation (eg, write radio image).
device_specific.IncrementalOTA_InstallEnd()
if OPTIONS.extra_script is not None:
script.AppendExtra(OPTIONS.extra_script)
# Patch the build.prop file last, so if something fails but the
# device can still come up, it appears to be the old build and will
# get set the OTA package again to retry.
script.Print("Patching remaining system files...")
system_diff.EmitDeferredPatches(script)
if OPTIONS.wipe_user_data:
script.Print("Erasing user data...")
script.FormatPartition("/data")
metadata["ota-wipe"] = "yes"
if OPTIONS.two_step:
script.AppendExtra("""
set_stage("%(bcb_dev)s", "");
endif;
endif;
""" % bcb_dev)
if OPTIONS.verify and system_diff:
script.Print("Remounting and verifying system partition files...")
script.Unmount("/system")
script.Mount("/system", recovery_mount_options)
system_diff.EmitExplicitTargetVerification(script)
if OPTIONS.verify and vendor_diff:
script.Print("Remounting and verifying vendor partition files...")
script.Unmount("/vendor")
script.Mount("/vendor", recovery_mount_options)
vendor_diff.EmitExplicitTargetVerification(script)
# For downgrade OTAs, we prefer to use the update-binary in the source
# build that is actually newer than the one in the target build.
if OPTIONS.downgrade:
script.AddToZip(source_zip, output_zip, input_path=OPTIONS.updater_binary)
else:
script.AddToZip(target_zip, output_zip, input_path=OPTIONS.updater_binary)
metadata["ota-required-cache"] = str(script.required_cache)
WriteMetadata(metadata, output_zip)
def main(argv):
def option_handler(o, a):
if o == "--board_config":
pass # deprecated
elif o in ("-k", "--package_key"):
OPTIONS.package_key = a
elif o in ("-i", "--incremental_from"):
OPTIONS.incremental_source = a
elif o == "--full_radio":
OPTIONS.full_radio = True
elif o == "--full_bootloader":
OPTIONS.full_bootloader = True
elif o in ("-w", "--wipe_user_data"):
OPTIONS.wipe_user_data = True
elif o in ("-n", "--no_prereq"):
OPTIONS.omit_prereq = True
elif o == "--downgrade":
OPTIONS.downgrade = True
OPTIONS.wipe_user_data = True
elif o in ("-o", "--oem_settings"):
OPTIONS.oem_source = a
elif o == "--oem_no_mount":
OPTIONS.oem_no_mount = True
elif o in ("-e", "--extra_script"):
OPTIONS.extra_script = a
elif o in ("-a", "--aslr_mode"):
if a in ("on", "On", "true", "True", "yes", "Yes"):
OPTIONS.aslr_mode = True
else:
OPTIONS.aslr_mode = False
elif o in ("-t", "--worker_threads"):
if a.isdigit():
OPTIONS.worker_threads = int(a)
else:
raise ValueError("Cannot parse value %r for option %r - only "
"integers are allowed." % (a, o))
elif o in ("-2", "--two_step"):
OPTIONS.two_step = True
elif o in ("-g", "--ubifs"):
OPTIONS.ubifs = True
elif o == "--no_signing":
OPTIONS.no_signing = True
elif o == "--verify":
OPTIONS.verify = True
elif o == "--block":
OPTIONS.block_based = True
elif o in ("-b", "--binary"):
OPTIONS.updater_binary = a
elif o in ("--no_fallback_to_full",):
OPTIONS.fallback_to_full = False
elif o == "--stash_threshold":
try:
OPTIONS.stash_threshold = float(a)
except ValueError:
raise ValueError("Cannot parse value %r for option %r - expecting "
"a float" % (a, o))
elif o == "--gen_verify":
OPTIONS.gen_verify = True
elif o == "--log_diff":
OPTIONS.log_diff = a
else:
return False
return True
args = common.ParseOptions(argv, __doc__,
extra_opts="b:k:i:d:wgne:t:a:2o:",
extra_long_opts=[
"board_config=",
"package_key=",
"incremental_from=",
"full_radio",
"full_bootloader",
"wipe_user_data",
"ubifs",
"no_prereq",
"downgrade",
"extra_script=",
"worker_threads=",
"aslr_mode=",
"two_step",
"no_signing",
"block",
"binary=",
"oem_settings=",
"oem_no_mount",
"verify",
"no_fallback_to_full",
"stash_threshold=",
"gen_verify",
"log_diff=",
], extra_option_handler=option_handler)
if len(args) != 2:
common.Usage(__doc__)
sys.exit(1)
if OPTIONS.downgrade:
# Sanity check to enforce a data wipe.
if not OPTIONS.wipe_user_data:
raise ValueError("Cannot downgrade without a data wipe")
# We should only allow downgrading incrementals (as opposed to full).
# Otherwise the device may go back from arbitrary build with this full
# OTA package.
if OPTIONS.incremental_source is None:
raise ValueError("Cannot generate downgradable full OTAs - consider"
"using --omit_prereq?")
# Load the dict file from the zip directly to have a peek at the OTA type.
# For packages using A/B update, unzipping is not needed.
input_zip = zipfile.ZipFile(args[0], "r")
OPTIONS.info_dict = common.LoadInfoDict(input_zip)
common.ZipClose(input_zip)
ab_update = OPTIONS.info_dict.get("ab_update") == "true"
if ab_update:
if OPTIONS.incremental_source is not None:
OPTIONS.target_info_dict = OPTIONS.info_dict
source_zip = zipfile.ZipFile(OPTIONS.incremental_source, "r")
OPTIONS.source_info_dict = common.LoadInfoDict(source_zip)
common.ZipClose(source_zip)
if OPTIONS.verbose:
print "--- target info ---"
common.DumpInfoDict(OPTIONS.info_dict)
if OPTIONS.incremental_source is not None:
print "--- source info ---"
common.DumpInfoDict(OPTIONS.source_info_dict)
WriteABOTAPackageWithBrilloScript(
target_file=args[0],
output_file=args[1],
source_file=OPTIONS.incremental_source)
print "done."
return
if OPTIONS.extra_script is not None:
OPTIONS.extra_script = open(OPTIONS.extra_script).read()
print "unzipping target target-files..."
OPTIONS.input_tmp, input_zip = common.UnzipTemp(args[0])
OPTIONS.target_tmp = OPTIONS.input_tmp
OPTIONS.info_dict = common.LoadInfoDict(input_zip, OPTIONS.target_tmp)
if OPTIONS.verbose:
print "--- target info ---"
common.DumpInfoDict(OPTIONS.info_dict)
# If the caller explicitly specified the device-specific extensions
# path via -s/--device_specific, use that. Otherwise, use
# META/releasetools.py if it is present in the target target_files.
# Otherwise, take the path of the file from 'tool_extensions' in the
# info dict and look for that in the local filesystem, relative to
# the current directory.
if OPTIONS.device_specific is None:
from_input = os.path.join(OPTIONS.input_tmp, "META", "releasetools.py")
if os.path.exists(from_input):
print "(using device-specific extensions from target_files)"
OPTIONS.device_specific = from_input
else:
OPTIONS.device_specific = OPTIONS.info_dict.get("tool_extensions", None)
if OPTIONS.device_specific is not None:
OPTIONS.device_specific = os.path.abspath(OPTIONS.device_specific)
if OPTIONS.info_dict.get("no_recovery") == "true":
raise common.ExternalError(
"--- target build has specified no recovery ---")
# Use the default key to sign the package if not specified with package_key.
if not OPTIONS.no_signing:
if OPTIONS.package_key is None:
OPTIONS.package_key = OPTIONS.info_dict.get(
"default_system_dev_certificate",
"build/target/product/security/testkey")
# Set up the output zip. Create a temporary zip file if signing is needed.
if OPTIONS.no_signing:
if os.path.exists(args[1]):
os.unlink(args[1])
output_zip = zipfile.ZipFile(args[1], "w",
compression=zipfile.ZIP_DEFLATED)
else:
temp_zip_file = tempfile.NamedTemporaryFile()
output_zip = zipfile.ZipFile(temp_zip_file, "w",
compression=zipfile.ZIP_DEFLATED)
# Non A/B OTAs rely on /cache partition to store temporary files.
cache_size = OPTIONS.info_dict.get("cache_size", None)
if cache_size is None:
print "--- can't determine the cache partition size ---"
OPTIONS.cache_size = cache_size
# Generate a verify package.
if OPTIONS.gen_verify:
WriteVerifyPackage(input_zip, output_zip)
# Generate a full OTA.
elif OPTIONS.incremental_source is None:
WriteFullOTAPackage(input_zip, output_zip)
# Generate an incremental OTA. It will fall back to generate a full OTA on
# failure unless no_fallback_to_full is specified.
else:
print "unzipping source target-files..."
OPTIONS.source_tmp, source_zip = common.UnzipTemp(
OPTIONS.incremental_source)
OPTIONS.target_info_dict = OPTIONS.info_dict
OPTIONS.source_info_dict = common.LoadInfoDict(source_zip,
OPTIONS.source_tmp)
if OPTIONS.verbose:
print "--- source info ---"
common.DumpInfoDict(OPTIONS.source_info_dict)
try:
WriteIncrementalOTAPackage(input_zip, source_zip, output_zip)
if OPTIONS.log_diff:
out_file = open(OPTIONS.log_diff, 'w')
import target_files_diff
target_files_diff.recursiveDiff('',
OPTIONS.source_tmp,
OPTIONS.input_tmp,
out_file)
out_file.close()
except ValueError:
if not OPTIONS.fallback_to_full:
raise
print "--- failed to build incremental; falling back to full ---"
OPTIONS.incremental_source = None
WriteFullOTAPackage(input_zip, output_zip)
common.ZipClose(output_zip)
# Sign the generated zip package unless no_signing is specified.
if not OPTIONS.no_signing:
SignOutput(temp_zip_file.name, args[1])
temp_zip_file.close()
print "done."
if __name__ == '__main__':
try:
common.CloseInheritedPipes()
main(sys.argv[1:])
except common.ExternalError as e:
print
print " ERROR: %s" % (e,)
print
sys.exit(1)
finally:
common.Cleanup()
从main函数开始分析，MAIN函数会先根据我们设置的option存入OPTIONS变量中。
在这其中，AppendAssertions(script, OPTIONS.info_dict, oem_dict)方法
def AppendAssertions(script, info_dict, oem_dict=None):
oem_props = info_dict.get("oem_fingerprint_properties")
if oem_props is None or len(oem_props) == 0:
#huangzhijian@wind-mobi.com add 20170517 start
#device = GetBuildProp("ro.product.device", info_dict)
#script.AssertDevice(device)
#huangzhijian@wind-mobi.com add 20170209 start
#name = GetBuildProp("ro.product.name", info_dict)
#script.AssertName(name)
#huangzhijian@wind-mobi.com add 20170209 end
carrier = GetBuildProp("ro.product.carrier", info_dict)
script.AssertCarrier(carrier)
#huangzhijian@wind-mobi.com add 20170517 end
else:
if oem_dict is None:
raise common.ExternalError(
"No OEM file provided to answer expected assertions")
for prop in oem_props.split():
if oem_dict.get(prop) is None:
raise common.ExternalError(
"The OEM file is missing the property %s" % prop)
script.AssertOemProperty(prop, oem_dict.get(prop))
如上，该方法会判断升级包中的carrier值与原版本carrier是否一致，来决定升级是否会继续下去。
