Re: Handling mutually excluding alternatives

On Tue, Feb 27, 2024 at 6:36 AM Andrei Borzenkov wrote:

On Tue, Feb 27, 2024 at 2:16 PM Adam Mizerski wrote:

...

Hi,

I wanted to push sequoia-octopus-librnp to Factory. It's a replacement for Thunderbird's default openpgp implementation. It works by being a drop-in replacement for a shared library librnp.so.

What I want to achieve: - MozillaThunderbird-openpgp-librnp and sequoia-octopus-librnp are mutually exclusive - MozillaThunderbird-openpgp-librnp should always be preferred over sequoia-octopus-librnp, unless user explicitly wants it.

See my WIP at https://build.opensuse.org/project/show/home:etamPL:branches:mozilla:experim...

Here's what I did (just the important bits): MozillaThunderbird.spec Requires: %{name}-openpgp Recommends: %{name}-openpgp-librnp %package openpgp-librnp Provides: %{name}-openpgp Conflicts: %{name}-openpgp

sequoia-octopus-librnp.spec Provides: MozillaThunderbird-openpgp Conflicts: MozillaThunderbird-openpgp

And it works. Even on a fresh system "zypper in --no-recommends MozillaThunderbird" pulls MozillaThunderbird-openpgp-librnp, but I'm not quite sure if it's something I can rely on. With "--no-recommends" how is zypper choosing MozillaThunderbird-openpgp-librnp over sequoia-octopus-librnp?

It just takes the first package in alphabetical order.

See also

https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/message/...

Unless you add "Suggests:" to prefer a particular implementation. :) -- 真実はいつも一つ！/ Always, there's only one truth!