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rated 0 times [  3] [ 0]  / answers: 1 / hits: 559  / 2 Years ago, thu, october 6, 2022, 6:02:56

The context


I wanted to audit my installed packages. I created a Python helper invoking dpkg-query, to create a packages database using Python dictionary and lists. The helper is smart enough to check dependencies are indeed present in the dictionary cloning the installed packages database. I get an error with the wings3d package: the helper notified me a package named erlang-abi-13.a is missing. Synaptic tells me this package is not installed. It still list this package as a wings3d dependency, but displays it in dependency, using italic instead of regular font.


The question(s)


What does it mean when Synaptic displays a dependency using italic? How a dependency may be missing while the package seems not to be broken?


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 Answers
4

All packages starting with erlang-abi, are virtual packages. This will be apparent from the apt-cache output:



apt-cache show erlang-abi-15.b

N: Can't select versions from package 'erlang-abi-15.b' as it is purely virtual

N: No packages found


Your helper is not accounting for virtual packages so it fails. This is also why Synaptic shows the packages with italics.


[#27316] Thursday, October 6, 2022, 2 Years  [reply] [flag answer]
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