[Bug 1978125] Re: apt ignoring pin/block/hold files in preferences.d for snapd

[Julian Andres Klode]

There is no specific handling in apt for this, so where are you seeing
this? Is it possible you see this in a graphical update tool like
update-manager?

Your apt-get log looks correct.

What does apt-cache policy snapd say?


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

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to apt in Ubuntu.
https://bugs.launchpad.net/bugs/1978125

Title:
  apt ignoring pin/block/hold files in preferences.d for snapd

Status in apt package in Ubuntu:
  Incomplete

Bug description:
  Did some upgrades on a new box on 22.04, and had previously removed
  snapd and BLOCKED via a file in /etc/apt/preferences.d/

  And this upgrade cycle REINSTALLED snapd! and the stupid FF snap! Had
  to repurge it again!

  I had done this previously, and it appears that apt or something is
  IGNORING any pin/holds of snapd

  I use preferences.d files as using:
  sudo apt-mark hold snapd 

  This has never worked on any package, ever...

  
  I have: 
  /etc/apt/preferences.d$ cat snapd

  Package: snapd
  Pin: origin *
  Pin-Priority: -1

  And that previously resulted in an error on apt in any attempt to
  install snapd, including using -s... NOW it will still attempt to
  install snapd!

  I've tried several variants of this as well, which other 22.04 and
  20.04 boxes have, same on 22.04, it will allow snapd install!

  Did sudo apt-get update, apt update several times, rebooted several
  times, had various levels of the Pin-Priority from -1 to -9999, still
  will attempt to install snapd, versus the expected error

  sudo apt-get -s install snapd

  Expected error: Reading package lists... Done Building dependency tree
  Reading state information... Done Package snapd is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

  E: Package 'snapd' has no installation candidate

  20.04 boxes still seem to fail correctly with this pin file,.....

  Checking my BASE VM IMAGE of 22.04 and this still works there, as its
  not been touched, this pin file blocks snapd from installing as
  expected... this is apt 2.3.15, updated one is 2.4.5....

  If I pick ANY OTHER RANDOM PACKAGE out and use the same pin/block
  file, and change the name to that package, it blocks it from
  installing! Anything but snapd this works for!

  1)$ lsb_release -rd
  Description:    Ubuntu 22.04 LTS
  Release:        22.04

  2)  sudo apt-cache policy apt
  apt:
    Installed: 2.4.5
    Candidate: 2.4.5
    Version table:
   *** 2.4.5 500
          500 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
          100 /var/lib/dpkg/status

  What I expect to happen? HONOR MY BLOCK on snapd! It works for any
  random package chosen, EXCEPT snadp!

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1978125/+subscriptions