[Bug 1988819] Re: When apt keeps back packages due to phased updates, it should list them separately

[Julian Andres Klode]

Proposed fix in:

https://salsa.debian.org/apt-
team/apt/-/merge_requests/327/diffs?commit_id=483e3b5c49762306c0a9f54117fd70cff43af4be

The corner case with kept back packages not due to phasing ends up with
a notice before the prompt:

Reading package lists...
Building dependency tree...
Calculating upgrade...
The following NEW packages will be installed:
  phased-new
The following updates have been deferred due to phasing:
  phased phased-dep phased-depends-ready-dep
The following packages have been kept back:
  depends-phased-dep ready-dep
The following packages will be upgraded:
  depends-phased-new phased-security
2 upgraded, 1 newly installed, 0 to remove and 5 not upgraded.
Need to get 0 B/126 B of archives.
After this operation, 43.0 kB of additional disk space will be used.
N: Some packages may have been kept back due to phasing.
Do you want to continue? [Y/n]

There may be a nicer way to do this.

** Changed in: apt (Ubuntu)
       Status: Triaged => In Progress

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https://bugs.launchpad.net/bugs/1988819

Title:
  When apt keeps back packages due to phased updates, it should list
  them separately

Status in apt package in Ubuntu:
  In Progress

Bug description:
  After phased updates have been introduced, it may happen that apt
  upgrade shows packages as upgradable but ends up not upgrading them.
  In this case the packages are indicated as being "kept back".

  Unfortunately, the feedback provided about this to the user is not
  very informative. The user sees the packages being kept back and
  thinks something is going wrong on the system.

  When packages are kept back because of phased updates, apt should say
  so e.g., it should say that the upgrade is delayed.

  Incidentally note that aptitude does not respect phased updates.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: apt 2.4.7
  ProcVersionSignature: Ubuntu 5.15.0-47.51-generic 5.15.46
  Uname: Linux 5.15.0-47-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.1
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Tue Sep  6 10:05:14 2022
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2020-02-16 (933 days ago)
  InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  SourcePackage: apt
  UpgradeStatus: Upgraded to jammy on 2022-06-03 (94 days ago)

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