How to tell which repositories provide which packages?

[Ralf Mardorf]

On Tue, 5 Jan 2021 22:01:57 +0100, Ralf Mardorf wrote:
>On Tue, 5 Jan 2021 15:29:17 -0500, Little Girl wrote:
>>Hey there,
>>
>>Chris Green wrote:
>>  
>>>Is there a way to tell from which repositories packages have been
>>>installed?
>>>
>>>I particularly want to see if I have any packages installed from a
>>>particular PPA.    
>>
>>This will give you your installed version, the candidate version
>>that's available (if any), and the sources for the various versions:
>>
>>apt-cache policy PACKAGENAME
>>
>>If you're feeling frisky, either of these will probably give you way
>>more information that you need, but can be good to keep in your back
>>pocket:
>>
>>dpkg -s PACKAGENAME
>>
>>apt-cache showpkg PACKAGENAME  
>
>It's not that easy.
>
>For example
>
>  apt-cache policy '*' | grep ppa
>
>shows all packages provided by a ppa and to what ppa they belong to

+ all packages containing "ppa" in their name.

>, so
>'*' must be replaced by the output of a script, that lists only all
>installed packages, something like e.g.
>
>  apt list --installed | cut -d/ -f1
>
>However, something like
>
>  apt-cache policy $(apt list --installed | cut -d/ -f1) | grep ppa
>
>won't do the job, since it does list packages containing 'ppa' that
>don't belong to any PPAs, while PPAs are shown without the installed
>packages that belongs to them. It's possible to solve this issue,
>either by investing some time in writing a script or perhaps by
>googling for scripts that already do exist.
>
>AFAIK there's no command available, that does what the OP wants to get.



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