On 22-09-2022 13:38, Dr. Arne Babenhauserheide wrote:
Tobias Geerinckx-Rice <m...@tobias.gr> writes:can I express "any version of ffmpeg"?No, this would go against the goals of Guix: packages can't depend on properties of the environment they'll end up in (if any).What’s the right way to deal with this, then? I need ffmpeg at as propagated-input, but I do not want to create a conflict with a manifest that just defines "ffmpeg".
In one my replies, I have proposed a method that avoids propagating ffmpeg:
To avoid profile collisions when the user installed a different version of ffmpeg (e.g. ffmpeg@5) in their profile, could you modify the code to look at a /gnu/store/.../bin/ffmpeg instead? Likewise for bubblewrap, gdk-pixbuf, poppler and librsvg, if feasible. For ffmpeg, the following function needs to be modified: https://0xacab.org/jvoisin/mat2/-/blob/master/libmat2/video.py#L139(substitute* + search-input-file can be useful).
Greetings, Maxime.
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