[Pkg-zope-developers] packaging decision

[martin f krafft]

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How will we be packaging products and other zope addons in the
future. I am currently working on zope-psycopg, which does not exist
for 2.7 yet.

=46rom what I know, the future will have products installed into
/usr/share/zope/Foo, so that /usr/share/zope and then tree-linked
into an instance's Products directory.

As long as we do not have dzhandle, we must still install products
to /usr/lib/zope or /usr/lib/zope2.7. This calls for extra packages,
since the existing 2.6 packages cannot always just include code for
both. For instance, zope-psycopgda would have to depend on

  zope2.7 | zope, python2.3-psycopg | python2.2-psycopg

People with zope 2.6 installed who pull in the package will get the
2.3 version. This will break things.

Thus, the short-term solution is to provide zope-psycopgda and
zope2.7-psycopgda, which both tree-link into /usr/lib from the files
installed by zope-psycopgda-common, and which then pre-compile the
modules. Of course, zope-psycopgda-common could be dropped and code
duplicated between zope2.7-psycopgda and zope-psycopgda, which is
what my patch in #292247 does. That's ugly though.

In the long run, zope-psycopgda-common and zope2.7-psycopgda will
then be dropped again, and zope-psycopgda will install to
/usr/share, expecting people to use dzhandle for instances. This is
still a while into the future and will require a challenging
migration path to be developed.

Do people have thoughts on the issue? Or are there better
suggestions?

Thanks,

--=20
 .''`.     martin f. krafft <madduck@debian.org>
: :'  :    proud Debian developer, admin, user, and author
`. `'`
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