How to tell which repositories provide which packages?

[Little Girl]

Hey there,

Chris Green wrote:
>Little Girl wrote:
   
>> 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
>>   
>This doesn't really tell me the truth:-

You're right. It apparently only works on packages that aren't
installed by PPAs.

I looked up Syncthing and it hasn't got an official PPA, so you'll
want to look in Synaptic or /etc/apt/sources.list
or /var/lib/apt/lists to find out what the repository name is. Then
you can run this command, replacing REPOSITORYNAME with the specific
name for the PPA for that program:

awk '$1 == "Package:" { print
$2 }' /var/lib/apt/lists/repo.REPOSITORYNAME*Packages

>> 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
>>   
>Neither of these seems to show anything about the PPA.

The second one gives me some PPA information for the Vivaldi PPA when
I do this:

apt-cache showpkg vivaldi-stable

The "File" lines were the results I was after, so I refined the
command a bit:

apt-cache showpkg vivaldi-stable | grep File

That uses the "vivaldi-stable" package name to give me the repository
information I needed for use in the above command.

So, to recap, if I have a package name, I can use it in this command
to get its PPA name, which is right after "repo" in the results:

apt-cache showpkg PACKAGENAME | grep File

Then I can follow that by inserting the repository name I got from
that command into this command to get all the packages installed by
that PPA:

awk '$1 == "Package:" { print
$2 }' /var/lib/apt/lists/repo.REPOSITORYNAME*Packages

-- 
Little Girl

There is no spoon.