Revert "Revert "Upgrade to 5.0.71.48""
This reverts commit f2e3994fa5148cc3d9946666f0b0596290192b0e,
and updates the x64 makefile properly so it doesn't break that
build.
Change-Id: Ib83e35bfbae6af627451c926a9650ec57c045605
diff --git a/build/write_build_date_header.py b/build/write_build_date_header.py
new file mode 100755
index 0000000..6fe514f
--- /dev/null
+++ b/build/write_build_date_header.py
@@ -0,0 +1,118 @@
+#!/usr/bin/env python
+# Copyright (c) 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+"""Writes a file that contains a define that approximates the build date.
+
+build_type impacts the timestamp generated:
+- default: the build date is set to the most recent first Sunday of a month at
+ 5:00am. The reason is that it is a time where invalidating the build cache
+ shouldn't have major reprecussions (due to lower load).
+- official: the build date is set to the current date at 5:00am, or the day
+ before if the current time is before 5:00am.
+Either way, it is guaranteed to be in the past and always in UTC.
+
+It is also possible to explicitly set a build date to be used.
+"""
+
+import argparse
+import calendar
+import datetime
+import doctest
+import os
+import sys
+
+
+def GetFirstSundayOfMonth(year, month):
+ """Returns the first sunday of the given month of the given year.
+
+ >>> GetFirstSundayOfMonth(2016, 2)
+ 7
+ >>> GetFirstSundayOfMonth(2016, 3)
+ 6
+ >>> GetFirstSundayOfMonth(2000, 1)
+ 2
+ """
+ weeks = calendar.Calendar().monthdays2calendar(year, month)
+ # Return the first day in the first week that is a Sunday.
+ return [date_day[0] for date_day in weeks[0] if date_day[1] == 6][0]
+
+
+def GetBuildDate(build_type, utc_now):
+ """Gets the approximate build date given the specific build type.
+
+ >>> GetBuildDate('default', datetime.datetime(2016, 2, 6, 1, 2, 3))
+ 'Jan 03 2016 01:02:03'
+ >>> GetBuildDate('default', datetime.datetime(2016, 2, 7, 5))
+ 'Feb 07 2016 05:00:00'
+ >>> GetBuildDate('default', datetime.datetime(2016, 2, 8, 5))
+ 'Feb 07 2016 05:00:00'
+ """
+ day = utc_now.day
+ month = utc_now.month
+ year = utc_now.year
+ if build_type != 'official':
+ first_sunday = GetFirstSundayOfMonth(year, month)
+ # If our build is after the first Sunday, we've already refreshed our build
+ # cache on a quiet day, so just use that day.
+ # Otherwise, take the first Sunday of the previous month.
+ if day >= first_sunday:
+ day = first_sunday
+ else:
+ month -= 1
+ if month == 0:
+ month = 12
+ year -= 1
+ day = GetFirstSundayOfMonth(year, month)
+ now = datetime.datetime(
+ year, month, day, utc_now.hour, utc_now.minute, utc_now.second)
+ return '{:%b %d %Y %H:%M:%S}'.format(now)
+
+
+def main():
+ if doctest.testmod()[0]:
+ return 1
+ argument_parser = argparse.ArgumentParser(
+ description=sys.modules[__name__].__doc__,
+ formatter_class=argparse.RawDescriptionHelpFormatter)
+ argument_parser.add_argument('output_file', help='The file to write to')
+ argument_parser.add_argument(
+ 'build_type', help='The type of build', choices=('official', 'default'))
+ argument_parser.add_argument(
+ 'build_date_override', nargs='?',
+ help='Optional override for the build date. Format must be '
+ '\'Mmm DD YYYY HH:MM:SS\'')
+ args = argument_parser.parse_args()
+
+ if args.build_date_override:
+ # Format is expected to be "Mmm DD YYYY HH:MM:SS".
+ build_date = args.build_date_override
+ else:
+ now = datetime.datetime.utcnow()
+ if now.hour < 5:
+ # The time is locked at 5:00 am in UTC to cause the build cache
+ # invalidation to not happen exactly at midnight. Use the same calculation
+ # as the day before.
+ # See //base/build_time.cc.
+ now = now - datetime.timedelta(days=1)
+ now = datetime.datetime(now.year, now.month, now.day, 5, 0, 0)
+ build_date = GetBuildDate(args.build_type, now)
+
+ output = ('// Generated by //build/write_build_date_header.py\n'
+ '#ifndef BUILD_DATE\n'
+ '#define BUILD_DATE "{}"\n'
+ '#endif // BUILD_DATE\n'.format(build_date))
+
+ current_contents = ''
+ if os.path.isfile(args.output_file):
+ with open(args.output_file, 'r') as current_file:
+ current_contents = current_file.read()
+
+ if current_contents != output:
+ with open(args.output_file, 'w') as output_file:
+ output_file.write(output)
+ return 0
+
+
+if __name__ == '__main__':
+ sys.exit(main())