[openstack-dev] [oslo] Why are we continuing to add new namespaced oslo libs?

Doug Hellmann doug at doughellmann.com
Thu Jan 29 16:24:17 UTC 2015

On Thu, Jan 29, 2015, at 11:03 AM, Thomas Goirand wrote:
> On 01/24/2015 02:01 AM, Doug Hellmann wrote:
> > 
> > 
> > On Fri, Jan 23, 2015, at 07:48 PM, Thomas Goirand wrote:
> >> Hi,
> >>
> >> I've just noticed that oslo.log made it to global-requirements.txt 9
> >> days ago. How come are we still adding some name.spaced oslo libs?
> >> Wasn't the outcome of the discussion in Paris that we shouldn't do that
> >> anymore, and that we should be using oslo-log instead of oslo.log?
> >>
> >> Is three something that I am missing here?
> >>
> >> Cheers,
> >>
> >> Thomas Goirand (zigo)
> > 
> > The naming is described in the spec:
> > http://specs.openstack.org/openstack/oslo-specs/specs/kilo/drop-namespace-packages.html
> > 
> > tl;dr - We did it this way to make life easier for the packagers.
> > 
> > Doug
> Hi Doug,
> Sorry for the late reply.
> Well, you're not making the life of *package maintainers* more easy,
> that's in fact the opposite way, I'm afraid.
> The Debian policy is that Python module packages should be named after
> the import statement in a source file. Meaning that if we do:
> import oslo_db
> then the package should be called python-oslo-db. This means that I will
> have to rename all the Debian packages to remove the dot and put a dash
> instead. But by doing so, if OpenStack upstream is keeping the old
> naming convention, then all the requirements.txt will be "wrong" (by
> wrong, I mean from my perspective as a package maintainer), and the
> automated dependency calculation of dh_python2 will put package names
> with dots instead of dashes.
> So, what is going to happen, is that I'll have to, for each and every
> package, build a dictionary of translations in debian/pydist-overrides.

That's unfortunate, but you're the only packager who seems to have this

I've already spent 2 months more time working on this transition than I
planned, so I'm not planning to do anything else disruptive with it this
cycle. If it remains a problem, or some of the other packagers support
renaming the packages, we can discuss it at the L summit to be done
during the L cycle.


> For example:
> # cat debian/pydist-overrides
> oslo.db python-oslo-db
> This is very error prone, and I may miss lots of dependencies this way,
> leading to the packages having wrong dependencies. I have a way to avoid
> the issue, which would be to add a Provides: python-oslo.db in the
> python-oslo-db package, but this should only be considered as a
> transition thing.
> Also, as a side note, but it may be interesting for some: the package
> python-oslo-db should have Breaks: python-oslo.db (<< OLD_VERSION) and
> Replaces: (<< OLD_VERSION), as otherwise upgrades will simply fail
> (because 2 different packages can't contain the same files on the
> filesystem).
> So if you really want to make our lives more easy, please do the full
> migration, and move completely away from dots.
> Also, I'd like to tell you that I feel very sorry that I couldn't attend
> the session about the oslo namespace in Paris. I was taken by my company
> to a "culture building" session all the afternoon. After reading the
> above, I feel sorry that I didn't attend the namespace session instead.
> :(
> Cheers,
> Thomas Goirand (zigo)
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