[Buildbot-commits] [Buildbot] #2522: test_changes_mail_CVSMaildirSource fails in some timezones

[Buildbot trac]

#2522: test_changes_mail_CVSMaildirSource fails in some timezones
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Reporter:  rutsky     |       Owner:
    Type:  undecided  |      Status:  new
Priority:  major      |   Milestone:  undecided
 Version:  master     |  Resolution:
Keywords:             |
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Comment (by dustin):

 marchael is seeing the same error (also in Europe/Moscow).  Here's the
 date handling I see:

 Parse the Date header using `email.Utils.parsedate_tz`, returning a
 10-tuple, the last element of which is the timezone offset from UTC.  This
 should be a tz-invariant transformation, and the timezone offset in the
 input string is 0.
 {{{
 >>> parsedate_tz(m["date"])
 (2010, 8, 7, 11, 11, 49, 0, 1, -1, 0)
 }}}
 This value is then immediately converted into an epoch timestamp (which is
 always implicitly UTC-oriented).  This, too, is a tz-invariant
 transformation.
 {{{
 >>> mktime_tz(dateTuple)
 1281179509
 }}}
 This is then converted into a UTC datetime object, again without reference
 to the tz:
 {{{
 >>> datetime.datetime.utcfromtimestamp(float(when))
 datetime.datetime(2010, 8, 7, 11, 11, 49)
 }}}
 Finally, this is converted to a string using stftime, which again is tz-
 independent:
 {{{
 >>> theTime.strftime('%Y-%m-%d %H:%M:%S')
 '2010-08-07 11:11:49'
 }}}

 Indeed, I get the same time here in US/Eastern and on a host in
 Europe/Berlin.

 Can one of you folks let me know how the following script behaves?
 {{{
 #!/usr/bin/env python
 import datetime
 import email.utils

 dateTuple = email.utils.parsedate_tz('Sat, 07 Aug 2010 11:11:49 +0000')
 print dateTuple
 when = email.utils.mktime_tz(dateTuple)
 print when
 theTime = datetime.datetime.utcfromtimestamp(float(when))
 print theTime
 rev = theTime.strftime('%Y-%m-%d %H:%M:%S')
 print rev
 }}}

-- 
Ticket URL: <http://trac.buildbot.net/ticket/2522#comment:3>
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