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Re: apt pinning: find out from which system version is a package

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On Fri, May 03, 2019 at 03:46:50AM +0200, Emanuel Berg wrote:
> David Wright wrote:
> 
> > $ dpkg-query -W -f '^Package: ${Package} \n' | grep --file=- "$Unique1" | sort

> Also I don't understand where the argument
> goes? Where is ${Package} defined, even tho it
> didn't (for me) even get that far?

It's in single quotes, not double quotes.  Therefore it is NOT expanded
by the shell.  The shell passes that string verbatim to the dpkg-query
command.

So the question becomes, what does ${Package} mean to dpkg-query?

Therefore, we consult the man page:

              Package  information  can  be  included  by  inserting  variable
              references    to    package    fields    using    the     syntax
              “${field[;width]}”. [...]

              The following fields are recognized [...]:

                 [...]
                 Maintainer
                 Origin
                 Package
                 Pre-Depends
                 [...]

And there you go.

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apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-04-29 05:40 +0200
  Re: apt pinning: find out from which system version is a package Jonas Smedegaard <jonas@jones.dk> - 2019-04-29 07:40 +0200
    Re: apt pinning: find out from which system version is a package "Alexander V. Makartsev" <avbetev@gmail.com> - 2019-04-29 09:20 +0200
      Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 03:40 +0200
    Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 03:40 +0200
      Re: apt pinning: find out from which system version is a package Greg Wooledge <wooledg@eeg.ccf.org> - 2019-05-03 14:40 +0200
  Re: apt pinning: find out from which system version is a package David Wright <deblis@lionunicorn.co.uk> - 2019-04-29 15:50 +0200
    Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 03:50 +0200
      Re: apt pinning: find out from which system version is a package <tomas@tuxteam.de> - 2019-05-03 08:50 +0200
        Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 23:20 +0200
          Re: apt pinning: find out from which system version is a package David Wright <deblis@lionunicorn.co.uk> - 2019-05-04 17:30 +0200
      Re: apt pinning: find out from which system version is a package Greg Wooledge <wooledg@eeg.ccf.org> - 2019-05-03 14:40 +0200
      Re: apt pinning: find out from which system version is a package David Wright <deblis@lionunicorn.co.uk> - 2019-05-03 14:50 +0200
  Re: apt pinning: find out from which system version is a package Francisco M Neto <fmneto@fmneto.com.br> - 2019-04-29 23:20 +0200
    Re: apt pinning: find out from which system version is a package Toni Mas <antomassol@gmail.com> - 2019-04-29 23:20 +0200
      Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 04:10 +0200
      Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 04:10 +0200
    Re: apt pinning: find out from which system version is a package Emanuel Berg <moasenwood@zoho.eu> - 2019-05-03 04:00 +0200

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