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The problem is you can't really support both iso8601 was dormant for
years, and the revived version isn't compatible with the old version.
So supporting both means basically forking iso8601 and maintaining you
own version of it monkey patched in your own tree.

On Wed, Nov 27, 2013 at 1:58 AM, Yaguang Tang
<yaguang.tang at canonical.com> wrote:
> after update to iso8601>=0.1.8, it breaks stable/neutron jenkins tests,
> because stable/glance requires  iso8601<=0.1.4, log info
> https://jenkins02.openstack.org/job/periodic-tempest-devstack-vm-neutron-stable-grizzly/43/console,
> I have filed a bug to track this
> https://bugs.launchpad.net/glance/+bug/1255419.
>
>
> 2013/11/26 Thomas Goirand <zigo at debian.org>
>>
>> I'm sorry to restart this topic.
>>
>> I don't mind if we upgrade to 0.1.8, but then I will need to have
>> patches for Havana to support version 0.1.8. Otherwise, it's going to be
>> very difficult on the packaging side: I will need to upload 0.1.8 for
>> Icehouse, but then it will break everything else (eg: Havana) that is
>> currently in Sid.
>>
>> Was there some patches already for that? If so, please point to them so
>> that I can cherry-pick them, and carry the patches in the Debian
>> packages (it doesn't have to be backported to the Havana branch, I'm
>> fine keeping the patches in the packages, if at least they are
>> identified).
>>
>> Is there a way that I can grep all commits in Gerrit, to see if there
>> was such patches committed recently?
>>
>> Cheers,
>>
>> Thomas Goirand (zigo)
>>
>> On 10/24/2013 09:37 PM, Morgan Fainberg wrote:
>> > It seems like adopting 0.1.8 is the right approach. If it doesn't work
>> > with other projects, we should work to help those projects get updated
>> > to work with it.
>> >
>> > --Morgan
>> >
>> > On Thursday, October 24, 2013, Zhi Yan Liu wrote:
>> >
>> >     Hi all,
>> >
>> >     Adopt 0.1.8 as iso8601 minimum version:
>> >     https://review.openstack.org/#/c/53567/
>> >
>> >     zhiyan
>> >
>> >     On Thu, Oct 24, 2013 at 4:09 AM, Dolph Mathews
>> >     <dolph.mathews at gmail.com <javascript:;>> wrote:
>> >     >
>> >     > On Wed, Oct 23, 2013 at 2:30 PM, Robert Collins
>> >     <robertc at robertcollins.net <javascript:;>>
>> >     > wrote:
>> >     >>
>> >     >> On 24 October 2013 07:34, Mark Washenberger
>> >     >> <mark.washenberger at markwash.net <javascript:;>> wrote:
>> >     >> > Hi folks!
>> >     >> >
>> >     >> > 1) Adopt 0.1.8 as the minimum version in
>> > openstack-requirements.
>> >     >> > 2) Do nothing (i.e. let Glance behavior depend on iso8601 in
>> >     this way,
>> >     >> > and
>> >     >> > just fix the tests so they don't care about these extra
>> > formats)
>> >     >> > 3) Make Glance work with the added formats even if 0.1.4 is
>> >     installed.
>> >     >>
>> >     >> I think we should do (1) because both (2) will permit surprising,
>> >     >> nonobvious changes in behaviour and (3) is just nasty
>> > engineering.
>> >     >> Alternatively, add a (4) which is (2) with "whinge on startup if
>> >     0.1.4
>> >     >> is installed" to make identifying this situation easy.
>> >     >
>> >     >
>> >     > I'm in favor of (1), unless there's a reason why 0.1.8 not viable
>> > for
>> >     > another project or packager, in which case, I've never heard the
>> > term
>> >     > "whinge" before so there should definitely be some of that.
>> >     >
>> >     >>
>> >     >>
>> >     >> The last thing a new / upgraded deployment wants is something
>> > like
>> >     >> nova, or a third party API script failing in nonobvious ways with
>> > no
>> >     >> breadcrumbs to lead them to 'upgrade iso8601' as an answer.
>> >     >>
>> >     >> -Rob
>> >     >>
>> >     >> --
>> >     >> Robert Collins <rbtcollins at hp.com <javascript:;>>
>> >     >> Distinguished Technologist
>> >     >> HP Converged Cloud
>> >     >>
>> >     >> _______________________________________________
>> >     >> OpenStack-dev mailing list
>> >     >> OpenStack-dev at lists.openstack.org <javascript:;>
>> >     >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>> >     >
>> >     >
>> >     >
>> >     >
>> >     > --
>> >     >
>> >     > -Dolph
>> >     >
>> >     > _______________________________________________
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>> >     > OpenStack-dev at lists.openstack.org <javascript:;>
>> >     > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>> >     >
>> >
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>> >
>> >
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>>
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>
>
>
>
> --
> Tang Yaguang
>
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-- 
Sean Dague
http://dague.net