On Mon, Jun 15, 2020 at 7:46 AM Richard W.M. Jones <rjo...@redhat.com> wrote:
>
> We autogenerate RPM Requires/Provides in a few projects, and it's
> quite nice. eg: supermin-devel has:
>
> $ rpm -ql supermin-devel
> /usr/lib/rpm/fileattrs/supermin.attr
> /usr/lib/rpm/supermin-find-requires
>
> and this means other packages that contain supermin appliances can
> simply put their appliance in a particular directory matching the name
> "*/supermin.d/packages/" and (since they have to BuildRequire
> supermin-devel anyway) RPM will create the correct dependencies
> automatically.
>
> Great! But ...
>
> I'd like to use it to autogenerate nbdkit plugin Provides, where the
> presence of a file named something like %{_libdir}/nbdkit/plugins/*.so
> should generate a Provides with the plugin name, eg:
>
> $ rpm -qf --provides /usr/lib64/nbdkit/plugins/nbdkit-curl-plugin.so
> nbdkit-curl-plugin = 1.21.7-1.fc33
>
> Right now we list them explicitly:
>
> https://src.fedoraproject.org/rpms/nbdkit/blob/master/f/nbdkit.spec#_161
>
> The problem is all the current plugins exist in nbdkit itself. nbdkit
> is not a BuildRequire of nbdkit, so it cannot provide RPM rules for
> itself. Doing so would create a nasty circular dependency that makes
> bootstrapping awkward.
>
> I could create a subpackage with the RPM rules, which is still a
> circular dependency but at least the subpackage would be noarch and
> wouldn't depend on anything else.
>
> This is getting complicated - is there some easier thing I'm missing here?
>
I *think* you can include your own Provides generator script and just
define the macros in the spec like you would in an attr file, and it
should work.
Something like so:
%__nbdkitplugins_provides %{SOURCE11}
%__nbdkitplugins_path ...
--
真実はいつも一つ！/ Always, there's only one truth!
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