On Fri, Aug 23, 2019 at 08:26:32AM -0400, Stephen John Smoogen wrote: > On Fri, 23 Aug 2019 at 06:52, Petr Pisar <ppi...@redhat.com> wrote: > > Case: RHEL delivers a non-modular P package. There is no S stream of > > a M module. Can I add a new M module with a new S stream that will contain > > a modular P package? I guess it will be allowed. Can I make the stream > > default? I guess that won't be allowed. > > > > I would agree with your assessment. > Thank you for the prompt response. I have yet another peculiar corner case of this one, that I is actually very prominent for me:
We have plenty of Perl packages in RHEL. Most of them are not modularized, thus they are compatible only with Perl 5.26, a default perl:5.26 stream. I feel there will be a demand for providing their modularized variants in EPEL so that users can use them even with non-default perl. All that can be implemented by adding a new module. This is not a problem. The problem is that the module will an second-class citizen compating to a module with net new package due to missing the default stream. The reasong for banning the default is that the EPEL modular package would mask the non-modular RHEL package. Let's I have a theoretcal way how to build that module so thet a context for perl:5.26 will be an empty, no RPM package. Then making the stream default would not violate the no-replacement rule. If a user used perl:5.26, yum would install the non-modular package from RHEL because there won't by any modular package masking it. If a user enabled a different perl stream, yum would install the modular package from EPEL. Would you accept this solution? -- Petr
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