[Bug 1772681] Re: [SRU] python-swauth package dropped but not removed

[Launchpad Bug Tracker]

This bug was fixed in the package swauth - 1.2.0-3ubuntu1

---------------
swauth (1.2.0-3ubuntu1) artful; urgency=medium

  [ Edward Hope-Morley ]
  * d/control: Add Breaks and Replaces rules to ensure python-swauth package
    is removed on upgrade (LP: #1772681).

  [ Corey Bryant ]
  * d/control: Add transitional package for python-swauth to ensure upgrades
    of python-swauth retain transitional package that depends on swauth
    (LP: #1772681).

 -- Corey Bryant <corey.bryant at canonical.com>  Thu, 07 Jun 2018 13:41:16
-0400

** Changed in: swauth (Ubuntu Artful)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1772681

Title:
  [SRU] python-swauth package dropped but not removed

Status in Ubuntu Cloud Archive:
  New
Status in Ubuntu Cloud Archive ocata series:
  Fix Committed
Status in Ubuntu Cloud Archive pike series:
  Fix Committed
Status in Ubuntu Cloud Archive queens series:
  Fix Committed
Status in swauth package in Ubuntu:
  Invalid
Status in swauth source package in Artful:
  Fix Released
Status in swauth source package in Bionic:
  Fix Released

Bug description:
  [Impact]
  Upgrading from Xenial/Mitaka to a newer release such as Newton or beyond will break since the newer packages dropped python-swauth package but do not uninstall it resulting in an install conflict. This patch fixes this by ensuring the upgrade uninstalls python-swauth prior to installing new swauth.

  [Test Case]
  * boot Xenial host
  * sudo apt install swauth
  * sudo add-apt-repository -y cloud-archive:newton (or whichever we are testing)
  * sudo apt update
  * sudo apt install swauth (upgrade)

  OR

  * boot Bionic host
  * sudo apt install swauth -ensure it installs cleanly

  [Regression Potential]
  None envisaged

  --------

  Versions greater than 1.0.4-0 have dropped the python-swauth package
  but do not remove it such that an upgrade breaks with error like:

  Unpacking swauth (1.1.0-3~cloud0) over (1.0.4-0ubuntu1.16.04.1) ...
  dpkg: error processing archive /var/cache/apt/archives/swauth_1.1.0-3~cloud0_all.deb (--unpack):
   trying to overwrite '/usr/lib/python2.7/dist-packages/swauth/__init__.py', which is also in package python-swauth 1.0.4-0ubuntu1.16.04.1
  Processing triggers for libc-bin (2.23-0ubuntu10) ...
  Processing triggers for man-db (2.7.5-1) ...
  Processing triggers for shared-mime-info (1.5-2ubuntu0.1) ...
  Processing triggers for sgml-base (1.26+nmu4ubuntu1) ...
  Processing triggers for ureadahead (0.100.0-19) ...
  Processing triggers for systemd (229-4ubuntu21.2) ...
  Errors were encountered while processing:
   /var/cache/apt/archives/swauth_1.1.0-3~cloud0_all.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  If i remove python-swauth prior to upgrade it works just fine.

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