[Bug 1485093] Re: python3-distupgrade contains symlink to externally owned directory

[Launchpad Bug Tracker]

This bug was fixed in the package ubuntu-release-upgrader - 1:16.04.1

---------------
ubuntu-release-upgrader (1:16.04.1) xenial; urgency=medium

  [ Barry Warsaw ]
  * Don't try to import janitor and NvidiaDetector in a package relative
    to this one, to avoid the possibility of dangling symlinks when the
    packages actually containing these modules is not installed.
    (LP: #1485093)
  * debian/python3-distupgrade.links: Removed.

  [ Brian Murray ]
  * DistUpgrade/{EOL,}ReleaseAnnouncement,
    DistUpgrade/DistUpgrade/window_main.ui,
    data/gtkbuilder/DistUpgrade.ui,
    data/DistUpgrade.cfg,
    data/DistUpgrade.cfg.trusty,
    pre-build.sh:
    - updated for 15.10->16.04
  * DistUpgrade/DistUpgradeQuirks.py: add in a quirk to ensure that a linux
    metapackage is installed after the release upgrade. (LP: #1509305)

  [ Michael Vogt ]
  * DistUpgrade/DistUpgradeQuirks.py: improve linux metapackage check and add
    a test for it.

 -- Brian Murray <brian at ubuntu.com>  Tue, 27 Oct 2015 13:45:19 -0700

** Changed in: ubuntu-release-upgrader (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1485093

Title:
  python3-distupgrade contains symlink to externally owned directory

Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Wily:
  Won't Fix

Bug description:
  python3-distupgrade contains the symlink /usr/lib/python3/dist-
  packages/DistUpgrade/NvidiaDetector which symlinks to
  ../NvidiaDetector.  However /usr/lib/python3/dist-
  packages/NvidiaDetector is owned by ubuntu-drivers-common.

  This causes a problem with at least the pex DEP-8 tests because in
  autopkgtest.ubuntu.com (and clean adt qemu images),
  python3-distupgrade is installed but not ubuntu-drivers-common.  Thus
  when pex invokes pkg_resources' get_resource_stream() you get a
  FileNotFound exception on the former, i.e. dead, symlink.

  Maybe python3-distupgrade should Depend on ubuntu-drivers-common, or
  maybe the symlink itself should be owned by the latter package.  I
  don't think the former should just leave a dangling symlink on the
  system.

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