[openstack-dev] [Nova] FFE Request: Oslo: i18n Message improvements

Matt Riedemann mriedem at linux.vnet.ibm.com
Fri Mar 7 17:09:48 UTC 2014

On 3/7/2014 9:39 AM, Matt Riedemann wrote:
> On 3/7/2014 4:15 AM, Sean Dague wrote:
>> On 03/06/2014 04:46 PM, James Carey wrote:
>>>      Please consider a FFE for i18n Message improvements:
>>> BP: https://blueprints.launchpad.net/nova/+spec/i18n-messages
>>>      The base enablement for lazy translation has already been sync'd
>>> from oslo.   This patch was to enable lazy translation support in Nova.
>>>   It is titled re-enable lazy translation because this was enabled
>>> during
>>> Havana but was pulled due to issues that have since been resolved.
>>>      In order to enable lazy translation it is necessary to do the
>>> following things:
>>>    (1) Fix a bug in oslo with respect to how keywords are extracted from
>>> the format strings when saving replacement text for use when the message
>>> translation is done.   This is
>>> https://bugs.launchpad.net/nova/+bug/1288049, which I'm actively working
>>> on a fix for in oslo.  Once that is complete it will need to be sync'd
>>> into nova.
>>>    (2) Remove concatenation (+) of translatable messages.  The current
>>> class that is used to hold the translatable message
>>> (gettextutils.Message) does not support concatenation.  There were a few
>>> cases in Nova where this was done and they are coverted to other means
>>> of combining the strings in:
>>> https://review.openstack.org/#/c/78095Remove use of concatenation on
>>> messages
>>>    (3) Remove the use of str() on exceptions.  The intent of this is to
>>> return the message contained in the exception, but these messages may
>>> contain unicode, so str cannot be used on them and gettextutils.Message
>>> enforces this.  Thus these need
>>> to either be removed and allow python formatting to do the right thing,
>>> or changed to unicode().  Since unicode() will change to str() in Py3,
>>> the forward compatible six.text_type() is used instead.  This is done
>>> in:
>>> https://review.openstack.org/#/c/78096Remove use of str() on exceptions
>>>    (4) The addition of the call that enables the use of lazy messages.
>>>   This is in:
>>> https://review.openstack.org/#/c/73706Re-enable lazy translation.
>>>      Lazy translation has been enabled in the other projects so it would
>>> be beneficial to be consistent with the other projects with respect to
>>> message translation.
>> Unless it has landed in *every other* integrated project besides Nova, I
>> don't find this compelling.
>> I have tested that the changes in (2) and (3) work
>>> when lazy translation is not enabled.  Thus if a problem is found, the
>>> two line change in (4) could be removed to get to the previous behavior.
>>>      I've been talking to Matt Riedemann and Dan Berrange about this.
>>>   Matt has agreed to be a sponsor.
>> If this is enabled in other projects, where is the Tempest scenario test
>> that actually demonstrates that this is working on real installs?
>> I get that everyone has features that didn't hit. BHowever now is not
>> that time for that, now is the time for people to get focussed on bugs
>> hunting. And especially if we are talking about *another* oslo sync.
>> -1
>>     -Sean
>> _______________________________________________
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>> OpenStack-dev at lists.openstack.org
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> The Tempest requirement just came up yesterday.  FWIW, this i18n stuff
> has been working it's way in since Grizzly, and the new requirement for
> Tempest is new.  I'm not saying it's not valid, but the timing sucks -
> but that's life.
> Also, the oslo sync would be to one module, gettextutils, which I don't
> think pulls in anything else from oslo.
> Anyway, this is in Keystone, Glance, Cinder, Neutron and Ceilometer at
> least.  Patches are working their way through Heat as I understand it.
> I'm not trying to turn this into a crusade, just trying to get out what
> I know about the current state of things.  I'll let Jim Carey or Jay
> Bryant discuss it more since they've been more involved in the
> blueprints across all the projects.

Dan (Smith), Sean, Jim, Jay and myself talked about this in IRC this 
morning and I didn't realize the recent oslo bug was uncovered due to 
something changing in how the audit logs were showing up after the 
initial nova patch was pushed up on 2/14.  So given that, given the 
number of things that would still need to land (oslo patch/sync plus 
possibly a hacking rule for str->six.text_type) AND the (despite being 
late) Tempest test requirement, I'm dropping sponsorship for this.

It simply came in too late and is too risky at this point, so let's 
revisit in Juno and get it turned on early so everyone can be 
comfortable with it.



Matt Riedemann

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