[Python-modules-team] Bug#831836: python-django: Add pymysql support

[Corey Bryant]

On Wed, Jul 20, 2016 at 5:27 PM, Raphael Hertzog <hertzog at debian.org> wrote:

> On Wed, 20 Jul 2016, Corey Bryant wrote:
> > This was originally driven as a result of upstream OpenStack's decision
> to
> > move to PyMySQL [1].  Only one client is typically supported in Ubuntu
> > main, so we decided to go with python-pymysql.  As a result, any Ubuntu
> > main packages that had a dependency on python-mysqldb had to be moved to
> > python-pymysql, and python-django was one of those.
>
> Thanks for the explanation.
>
> Strictly speaking, the package has no "dependency" on python-mysqldb, only
> a "suggests". It can be used with other database drivers as well.
>
> While I understand your reasoning, I believe that this change must happen
> at the upstream level first. Debian has no similar restriction and I thus
> don't see the need to diverge from upstream on this specific point.
>

Fair enough and I agree to getting this change upstream.  I guess I don't
have context on what the core issue of this discussion is though.  Is
Jeremy blocked on this or was he just trying to get rid of the delta
between the Debian and Ubuntu packages?  It's perfectly normal for Ubuntu
to carry a delta on top of what Debian has.


>
> Jeremy, alternatively, you could possibly create a
> python-pymsql-as-mysqldb that would "Provide: python-mysqldb" and would
> contain the corresponding Python package but built on top of
> python-pymysql (and would conflict with python-mysqldb). That might be
> something upstreamable in pymysql or in the Debian package of
> python-pymysql.
>
> I see that many Openstack packages in Debian depend on both
> python-mysqldb and python-pymysql. I guess in Ubuntu they depend only in
> python-pymysql? Is the difference explained by this Django patch only?


Upstream OpenStack hasn't completed moved away from python-mysqldb yet.  I
assume once they've completely moved to py3 (which they haven't yet)
they'll drop python-mysqldb support.

Looking at the reverse dependencies in Ubuntu, only three packages have
reverse Depends on python-mysqldb: python-trove python-sahara
python-murano, all of which are in universe. Note: this doesn't include
Build-Depends since build depends can now live in universe.

⟫ apt-cache rdepends python-pymysql
python-pymysql
Reverse Depends:
  python-taskflow
  python-nova
  python-neutron
  python-keystone
  python-aodh
  python-barbican
  python-ironic
  python-trove
  python-neutron
  python-heat
  python-keystone
  python-nova
  python-heat
  python-nova
  python-trove
  python-tornado
  python-sahara
  python-rally
  python-murano
  python-mistral
  python-ironic
  python-gnocchi
  python-django16
  python-barbican
  python-aodh
  jeepyb
  python-tooz
  python-django
  python-sqlalchemy
  python-nova
  python-neutron
  python-moinmoin
  python-keystone
  python-heat

⟫ apt-cache rdepends python-mysqldb
python-mysqldb
Reverse Depends:
  emma
  python-trove
  mytharchive
  libmyth-python
  viewvc-query
  rddmarc
  python3-biopython
 |python-webpy
  python-trove
 |python-storm-dbg
 |python-storm
  python-sqlobject
  python-sqlkit
 |python-sqlkit
  python-sql
  python-springpython
  python-scrapy
  python-sahara
  python-rally
  python-pyevolve
  python-murano
  python-biopython-sql
  python-biopython
  python-authkit
  python-adodb
  pysieved
  pyrit
  pyicqt
  pyaimt
  pwman3
  puddletag
  patator
  papercut
  openmolar
  mercurial-common
 |ibid
  griffith
  graphite-web
  epigrass
  python-mysqldb-dbg
 |djagios
  dhcpy6d
  blogofile-converters
  bley
  bibus
  bcfg2-web
 |bauble
 |bauble
  automx
  auth2db

-- 
Regards,
Corey
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