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Fix 2009-01-01 timestamps in releasetools to always be UTC

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The usage of datetime.fromtimestamp previously resulted in the build or
signing machine's local timezone affecting the Unix timestamp ultimately
applied to images generated by add_img_to_target_files. The go/ab build
outputs would use 2009-01-01 00:00 UTC, for example, but local builds
and the release signed images (generated through go/ab-sign) would use
2009-01-01 00:00 PST. This change makes the timestamps always use UTC.

Bug: 80600931
Bug: 80093599
Test: 'm -j droid dist' and verified timestamps in resulting
target_files zip.

Change-Id: Ic2a19591519850c249f78254e1464aa6839bfc6c
This commit is contained in:
Bryan Henry 2018-07-31 18:32:00 -07:00
parent bb937a6b69
commit e6d547d53a
2 changed files with 13 additions and 20 deletions
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25
tools/releasetools/add_img_to_target_files.py
View file

@ -72,10 +72,12 @@ OPTIONS.replace_verity_public_key = False
OPTIONS.replace_verity_private_key = False
OPTIONS.is_signing = False
# Partitions that should have their care_map added to META/care_map.txt.
PARTITIONS_WITH_CARE_MAP = ('system', 'vendor', 'product', 'product-services')
# Use a fixed timestamp (01/01/2009 00:00:00 UTC) for files when packaging
# images. (b/24377993, b/80600931)
FIXED_FILE_TIMESTAMP = (datetime.datetime(2009, 1, 1, 0, 0, 0, 0, None)
- datetime.datetime.utcfromtimestamp(0)).total_seconds()
class OutputFile(object):
def __init__(self, output_zip, input_dir, prefix, name):
@ -94,7 +96,6 @@ class OutputFile(object):
if self._output_zip:
common.ZipWrite(self._output_zip, self.name, self._zip_name)
def GetCareMap(which, imgname):
"""Returns the care_map string for the given partition.
@ -259,11 +260,7 @@ def CreateImage(input_dir, info_dict, what, output_file, block_list=None):
if fstab and mount_point in fstab:
image_props["fs_type"] = fstab[mount_point].fs_type
# Use a fixed timestamp (01/01/2009) when packaging the image.
# Bug: 24377993
epoch = datetime.datetime.fromtimestamp(0)
timestamp = (datetime.datetime(2009, 1, 1) - epoch).total_seconds()
image_props["timestamp"] = int(timestamp)
image_props["timestamp"] = FIXED_FILE_TIMESTAMP
if what == "system":
fs_config_prefix = ""
@ -337,11 +334,7 @@ def AddUserdata(output_zip):
print("creating userdata.img...")
# Use a fixed timestamp (01/01/2009) when packaging the image.
# Bug: 24377993
epoch = datetime.datetime.fromtimestamp(0)
timestamp = (datetime.datetime(2009, 1, 1) - epoch).total_seconds()
image_props["timestamp"] = int(timestamp)
image_props["timestamp"] = FIXED_FILE_TIMESTAMP
if OPTIONS.info_dict.get("userdata_img_with_data") == "true":
user_dir = os.path.join(OPTIONS.input_tmp, "DATA")
@ -483,11 +476,7 @@ def AddCache(output_zip):
print("creating cache.img...")
# Use a fixed timestamp (01/01/2009) when packaging the image.
# Bug: 24377993
epoch = datetime.datetime.fromtimestamp(0)
timestamp = (datetime.datetime(2009, 1, 1) - epoch).total_seconds()
image_props["timestamp"] = int(timestamp)
image_props["timestamp"] = FIXED_FILE_TIMESTAMP
user_dir = common.MakeTempDir()

8
tools/releasetools/common.py
View file

@ -1271,8 +1271,12 @@ def ZipWrite(zip_file, filename, arcname=None, perms=0o644,
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()
# Note: Use of fromtimestamp rather than utcfromtimestamp here is
# intentional. zip stores datetimes in local time without a time zone
# attached, so we need "epoch" but in the local time zone to get 2009/01/01
# in the zip archive.
local_epoch = datetime.datetime.fromtimestamp(0)
timestamp = (datetime.datetime(2009, 1, 1) - local_epoch).total_seconds()
os.utime(filename, (timestamp, timestamp))
zip_file.write(filename, arcname=arcname, compress_type=compress_type)