Re: F31 System-Wide Change proposal: Automatic strict inter-package dependencies

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On Mon, Feb 18, 2019 at 9:21 PM Ben Cotton <bcotton@xxxxxxxxxx> wrote:
>
> https://fedoraproject.org/wiki/Changes/Automatic_strict_inter-package_dependencies
>
> = Automatic strict inter-package dependencies =
>
> == Summary ==
> Implement feature in RPM which will enforce strict dependencies
> between subpackages automatically (right now packagers have to do it
> themselves).
>
> == Owner ==
> * Name: [[User:ignatenkobrain|Igor Gnatenko]]
> * Email: ignatenkobrain@xxxxxxxxxxxxxxxxx
>
> == Detailed Description ==
> Let's take graphene as an example.
>
> Spec file contains:
> <pre>
> %package devel
> Requires: %{name}%{?_isa} = %{version}-%{release}
> %package tests
> Requires: %{name}%{?_isa} = %{version}-%{release}
> </pre>

This seems like a nice change.
I almost forget to add these lines sometimes, and I always have to
look up the correct way to do them.
Doing this automatically would definitely reduce .spec noise.

Fabio

> What we see when we build RPMs is:
> * <code>graphene-devel</code> requires <code>graphene(x86-64) =
> 1.8.2-3.fc30</code> AND <code>libgraphene-1.0.so.0()(64bit)</code> AND
> <code>pkgconfig(graphene-1.0)</code>
> * <code>graphene-tests</code> requires <code>graphene(x86-64) =
> 1.8.2-3.fc30</code> AND <code>libgraphene-1.0.so.0()(64bit)</code>
>
> What can we do?
> * <code>Requires: libgraphene-1.0.so.0()(64bit)</code> is actually
> provided by <code>graphene</code> (coming from same package), so it
> can be dropped in favor of <code>Requires: graphene(x86-64) =
> 1.8.2-3.fc30</code>
> * <code>Requires: pkgconfig(graphene-1.0)</code> is provided by
> <code>graphene-devel</code> (coming from the same subpackage), so it
> can be dropped entirely
>
> == Benefit to Fedora ==
> Package dependencies (between subpackages) will be more strict, more
> automated ([https://docs.fedoraproject.org/en-US/packaging-guidelines/#_requiring_base_package
> this section from guidelines] can be dropped entirely). Metadata size
> will decrease as well.
>
> == Scope ==
> * Proposal owners: Implement required feature in RPM, backport it to Fedora.
> * Other developers: Drop unneeded dependencies to keep spec file simpler.
> * Release engineering: [https://pagure.io/releng/issue/8128 #8128]
> * Policies and guidelines: Drop yet another Packaging Guidelines
> section because it will be automated.
> * Trademark approval: N/A (not needed for this Change)
>
> == Upgrade/compatibility impact ==
> Everything will keep working.
>
> == How To Test ==
> TBD.
>
> == User Experience ==
> User's won't see packaging errors (wrt. inter-package dependencies) anymore.
>
> == Dependencies ==
> RPM changes are needed. Will be handled by Proposal Owners.
>
> == Contingency Plan ==
> * Contingency mechanism: (What to do?  Who will do it?) Proposal
> Owners will try to fix problems ASAP or move Change to the next
> release (and revert changes).
> * Contingency deadline: Beta Freeze.
> * Blocks release? No.
> * Blocks product? No.
>
> == Documentation ==
> TBD.
>
>
>
> --
> Ben Cotton
> Fedora Program Manager
> TZ=America/Indiana/Indianapolis
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