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

[Łukasz Zemczak]

Hello Edward, or anyone else affected,

Accepted swauth into bionic-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/swauth/1.3.0-1ubuntu1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: swauth (Ubuntu Bionic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-bionic

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

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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