[Bug 1565782] Re: APT doesn't respect pin-priority when using APT::Default-Release option

[David Kalnischkies]

This is a feature, so you can pin a release (like backports) to a low
value, but raise it easily if you need to. It is also explicitly
documented in the apt_preferences manpage, which also mentions a
"workaround": Note that this [= the target release setting] has
precedence over any general priority you set in the /etc/apt/preferences
file described later, but not over specifically pinned packages.

Closing as not-a-bug hence.

** Changed in: apt (Ubuntu)
       Status: New => Invalid

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Title:
  APT doesn't respect pin-priority when using APT::Default-Release
  option

Status in apt package in Ubuntu:
  Invalid

Bug description:
  I'm trying to pin packages from the proprietary graphics drivers PPA,
  and I want APT to use this PPA even if a newer version is available in
  a target release, so I put it at a pin-priority of 999

  --- /etc/apt/preferences.d/graphics-drivers-ppa-pin-999
  Package: *
  Pin: release o=LP-PPA-graphics-drivers
  Pin-Priority: 999
  ---

  If I test this with 'apt-cache policy', the priorities seems to be
  correct.

  ---
  $ apt-cache policy nvidia-346
  nvidia-346:
    Installerad: 346.96-0ubuntu0~gpu14.04.2
    Kandidat:    346.96-0ubuntu0~gpu14.04.2
    Versionstabell:
       352.63-0ubuntu0.14.04.1 0
          500 http://se.archive.ubuntu.com/ubuntu/ trusty-updates/restricted amd64 Packages
          500 http://security.ubuntu.com/ubuntu/ trusty-security/restricted amd64 Packages
   *** 346.96-0ubuntu0~gpu14.04.2 0
          999 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status
  ---

  But if I use the 'APT::Default-Release' configuration option, the
  priority gets lowered to 990, resulting in the wrong candidate.

  ---
  $ apt-cache -o 'APT::Default-Release=trusty' policy nvidia-346
  nvidia-346:
    Installerad: 346.96-0ubuntu0~gpu14.04.2
    Kandidat:    352.63-0ubuntu0.14.04.1
    Versionstabell:
       352.63-0ubuntu0.14.04.1 0
          990 http://se.archive.ubuntu.com/ubuntu/ trusty-updates/restricted amd64 Packages
          990 http://security.ubuntu.com/ubuntu/ trusty-security/restricted amd64 Packages
   *** 346.96-0ubuntu0~gpu14.04.2 0
          990 http://ppa.launchpad.net/graphics-drivers/ppa/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status
  ---

  The same thing happens when using apt-get/aptitude's '-t' flag, i.e.
  the wrong version gets marked for installation. It seems the policy
  engine sets the priority to 990 if the package matches the target
  release, regardless of the previous (higher) value. I think this
  behavior is a bug and should be fixed so that a certain package's
  priority doesn't get lowered for belonging to the target release.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: apt 1.0.1ubuntu2.11
  ProcVersionSignature: Ubuntu 3.13.0-83.127-generic 3.13.11-ckt35
  Uname: Linux 3.13.0-83-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  Date: Mon Apr  4 14:11:26 2016
  InstallationDate: Installed on 2014-08-08 (605 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  ProcEnviron:
   TERM=xterm-256color
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=sv_SE.UTF-8
   XDG_RUNTIME_DIR=<set>
  SourcePackage: apt
  UpgradeStatus: No upgrade log present (probably fresh install)

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