[Bug 2087320] Re: Removing an APT to snap transitional package does not remove the snap

[Julian Andres Klode]

This is a bit of a wrong recipient for your complaint - apt does not
manage snap packages, the deb2snap packages implement that in their
maintainer scripts - but let me say that this behaviour is in line with
the behaviour expected for transitional packages.

For deb2deb transitional packages, apt even implements special logic for
that behaviour: If a package is manually installed but becomes a
transitional package, the manual bit moves to the new package replacing
it and the transitional package becomes autoremovable.

The behaviour for deb2snap packages is in line with that, with the
exception that these do not become automatically removable.

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

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https://bugs.launchpad.net/bugs/2087320

Title:
  Removing an APT to snap transitional package does not remove the snap

Status in apt package in Ubuntu:
  Invalid

Bug description:
  Environment:
  Xubuntu 24.04.1 LTS x86-64
  apt 2.7.14build2
  snap 2.65.3+24.04

  Steps to reproduce:
  Open a terminal and enter these commands

  df
  sudo apt install chromium-browser
  sudo apt purge chromium-browser
  df

  Actual results:
  APT does not offer to remove the snap after removing the transitional package.

  Expected results:
  APT removes the snap and archived older versions, either on its own (because nothing depends on it) or by displaying the appropriate snap command to run afterward.

  Additional notes:
  During these steps, I observe bug #1958811, in which apt install displays the size of only the transitional package proper, not the snap it installs.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: apt 2.7.14build2
  ProcVersionSignature: Ubuntu 6.8.0-48.48-generic 6.8.12
  Uname: Linux 6.8.0-48-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.1
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: XFCE
  Date: Thu Nov  7 17:44:07 2024
  InstallationDate: Installed on 2021-05-16 (1271 days ago)
  InstallationMedia: Xubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  SourcePackage: apt
  UpgradeStatus: Upgraded to noble on 2024-06-07 (154 days ago)

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