Bug#755212: transition: protobuf-c

[Robert Edmonds <edmonds@debian.org>]

Emilio Pozuelo Monfort wrote:
> On 18/07/14 22:19, Robert Edmonds wrote:
> >     * The header file (protobuf-c.h) which compiled .pb-c.h files must
> >       include.  This is shipped in the libprotobuf-c0-dev package
> >       (protobuf-c < 1.0.0), or the libprotobuf-c-dev package (protobuf-c
> >       >= 1.0.0).  (libprotobuf-c-dev Provides: libprotobuf-c0-dev, which
> >       smoothes the transition for packages with an unversioned
> >       build-dependency on libprotobuf-c0-dev.)
> 
> I just realized that that's not going to work, because the old
> libprotobuf-c0-dev is still available, and so packages that build-depend on that
> will get libprotobuf-c0-dev. So they'll need sourceful uploads to build-depend
> on the new (unversioned) libprotobuf-c-dev.

Hi, Emilio:

Are you sure about that?  protobuf-c-compiler has:

    Depends: ${shlibs:Depends}, ${misc:Depends}, libprotobuf-c-dev (= ${binary:Version})

Which will force libprotobuf-c-dev to be installed.  And
libprotobuf-c-dev has:

    Depends: libprotobuf-c1 (= ${binary:Version}), ${misc:Depends}
    Provides: libprotobuf-c0-dev
    Conflicts: libprotobuf-c0-dev
    Replaces: libprotobuf-c0-dev
    Breaks: protobuf-c-compiler (<< 1.0.0~)

Which will force libprotobuf-c0-dev to be uninstalled.

I *think* what will happen is that if a package does:

    Build-Depends: protobuf-c-compiler

or

    Build-Depends: protobuf-c-compiler, libprotobuf-c0-dev

They will end up with protobuf-c-compiler (1.0.0-1) and
libprotobuf-c-dev (1.0.0-1) installed, which is what is desired.

I think all of the packages I listed in my original email had a
build-dep on either protobuf-c-compiler only, or protobuf-c-compiler and
libprotobuf-c0-dev.  (I don't think there are any with just
libprotobuf-c0-dev.)

The only package with a versioned build-dep on libprotobuf-c0-dev is
osm2pgsql, which needs other sourceful changes anyway.  I think with the
pending upload of osm2pgsql (#756112) there will be no more packages in
the Debian archive with a versioned build-dep on libprotobuf-c0-dev, and
it can be removed from the archive?

-- 
Robert Edmonds
edmonds@debian.org