On Fri, Jun 14, 2019, 09:42 Remi Collet <fed...@famillecollet.com> wrote:

> Le 13/06/2019 à 20:31, Adam Samalik a écrit :
> > So, I'd like to discuss the libgit issue [1] [2] we're experiencing.
> With a
> > help of a few people, I've put together this post to get us on common
> > ground: https://communityblog.fedoraproject.org/modularity-vs-libgit/
> >
> > There are few ideas about solving the issue right now. But we might be
> able
> > to think about better ways to deal with similar issues long-term. Let's
> do
> > this!
>
> IMHO, having library in modules is an error, this can only raise issues
>
> Perhaps debian was right, and we should use a naming schema matching the
> library ABI, so including the soname
>
>         libgit26-0.26.8
>         libgit27-0.27.8
>         libgit28-0.28.1
>         etc
>
> Thanks to soname, library are perfect use case for parallel installation
> of multiple versions.
>

I agree, this is a way better solution for libraries (where possible).


> And thanks to range version, this can be describe for dependencies.
>
> BuildRequires: (pkgconfig(libgit) >=26 with pkgconfig(libgit) <= 27)
>
> Yes, this will means more packages, and more reviews, but having a new
> review on a old library when soname change make sense.
>

Compat packages for existing libraries are already exempt from package
review, so that's not an issue.


> Of course, old versions have to be retired when no more used
>

This is already what's happening with versioned llvm, for example.


> Modules are fine for applications.
>
>
> Remi
>
>
> P.S. yes compat_* name schema also works... but also consider it as a
> bit ugly...
>

The Packaging Guidelines explicitly state that libfoo0, libfoo0.7 or
libgit2_0.27 patterns should be used for compat package names. The
compat-foo stuff is outdated.

Fabio

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