Re: Modularity and the system-upgrade path

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Il giorno mer 16 ott 2019 alle ore 11:58 Fabio Valentini
<decathorpe@xxxxxxxxx> ha scritto:
>
> On Wed, Oct 16, 2019 at 11:50 AM Alexander Bokovoy <abokovoy@xxxxxxxxxx> wrote:
> >
> > On ti, 15 loka 2019, John M. Harris Jr wrote:
> > >On Tuesday, October 15, 2019 9:40:31 PM MST Neal Gompa wrote:
> > >> And to be fair, while it is a hard problem to solve, it's a worthy
> > >> one. It makes sense and if done well, could really distinguish Fedora
> > >> from the rest in providing a way for codifying individual lifecycles
> > >> separately from the distribution. Moreover, with all the container
> > >> circus stuff going on, it's become even more important to enable some
> > >> kind of parallel availability.
> > >
> > >If "parallel availability" is the problem Modularity is trying to solve, it
> > >seems that Modularity is a failure. You can't install more than one version of
> > >a package at once.
> > You are mixing up parallel availability and parallel installability.
> > These aren't the same. Modularity does solve parallel availability
> > problem. It was never designed to solve parallel installability problem.
>
> And that is, in my opinion, the root source of all the issues that are
> currently plaguing Modularity.
> Parallel availability without parallel installability can only lead to problems.
> This is just a new, shiny version of DLL hell. Thanks, I hate it.

+1
I totally agree

> Fabio
>
> > >Anyway, this is off topic, in my eyes, the best course of action is to simply
> > >require that all modules have a non-modular version in Fedora. This can also
> > >be done for things that are currently default modules. Sure, those who have
> > >existing installs with modules won't get their install fixed with the current
> > >code, but new installations would. That's a start.
> >
> > I don't think it is not only reasonable to have this requirement but it
> > is also detrimental to the project to have the requirement that
> > basically doubles the amount of work volunteers have to do. Simply
> > providing content of default modules in non-modular way ignores the fact
> > that you somehow need to be able to rebuild those packages and they
> > might depend in their build dependencies on packages from other modules,
> > including non-default streams.
> >
> >
> > --
> > / Alexander Bokovoy
> > Sr. Principal Software Engineer
> > Security / Identity Management Engineering
> > Red Hat Limited, Finland
> > _______________________________________________
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