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Ian Cordasco wrote:
>
> On 7/13/15, 15:09, "Dave Walker"<email at daviey.com>  wrote:
>
>> On 13 Jul 2015 8:52 pm, "Ian Cordasco"<ian.cordasco at rackspace.com>  wrote:
>>> On 7/13/15, 03:38, "Thierry Carrez"<thierry at openstack.org>  wrote:
>> <SNIP>
>>>> By "counter-productive", I meant: likely to generate more confusion
>>> than
>>>> clarity. If you provide an epoch in the version and it doesn't match
>>>> downstream packagers ones, it's hard to rely on it.
>>> I see what you mean now. The thing is that for Debian/Fedora the epoch
>>> syntax is different from PEP 440
>>>
>>> For them it's
>>>
>>> [distro-epoch]:[upstream-version][otherstuff]
>>>
>>> PEP 440 epochs are separated by a !, so let's say $(distro) has an epoch
>>> value of "1" and we choose "2", for glance the version would look ugly
>>> but
>>> would be:
>>>
>>> 1:2!11.0.0
>>>
>> <SNIP>
>> This would be a problem for at least Ubuntu and Debian as the version
>> string is specifically not allowed to contain a '!'.
>> "The upstream_version may contain only alphanumerics and the characters .
>> +- : ~ (full stop, plus, hyphen, colon, tilde) and should start with a
>> digit." [0]
>
> Thanks for the input Dave. I didn't see that part since I was specifically
> looking for how epochs are denoted. I still am quite certain that we have
> no choice but to use the proper versioning tools upstream though and that
> means using ! to indicate the epoch in our version strings because these
> are fundamentally Python packages.

+1 we produce python versions, and people use them (whether they are 
uploaded to pypi or not) so we should try to do the right thing here no 
matter what. If downstream distro (rh, ubuntu, other...) wants to 
convert that into its local epoch scheme that's cool (and I would expect 
them to do that in the correct manner that is appropriate for there 
packages).

>
>
>> Therefore, these distro's would need to increment the distro epoch if the
>> upstream version (without the upstream epoch) is lower than the version
>> currently in their archives.
>> I am not sure how rpm based distro's handle '!' in the upstream version.
>
> In other words, if Debian/Ubuntu currently have Glance versioned:
>
>    1:2015.1.0
>
> They'll be doing
>
>    2:8.0.0
>
> For Liberty?
>
> --
> Ian
>
>
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