[Bug 1497024] Re: release upgrades should jump over unsupported releases

[Chris J Arges]

Hello Brian, or anyone else affected,

Accepted ubuntu-release-upgrader into vivid-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/ubuntu-release-upgrader/1:15.04.14.2 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 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 to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

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

** Changed in: ubuntu-release-upgrader (Ubuntu Vivid)
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1497024

Title:
  release upgrades should jump over unsupported releases

Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in update-manager package in Ubuntu:
  Fix Released
Status in ubuntu-release-upgrader source package in Trusty:
  Invalid
Status in update-manager source package in Trusty:
  Fix Committed
Status in ubuntu-release-upgrader source package in Vivid:
  Fix Committed
Status in update-manager source package in Vivid:
  Fix Committed

Bug description:
  Test Case
  ---------
  There isn't a great test case for the Vivid update-manager change as the change will only have an effect when W is unsupported. Having said that I did add a test to update-manager which verifies the logic of the change. Additionally, it would be good to ensure an offer to upgrade to Wily is given when running 'do-release-upgrade -d'.

  Regression Potential
  --------------------
  If the patch is incorrect upgrades to the development release of Ubuntu won't be offered. There is a test for that and running 'do-release-upgrade -d' on Vivid will prove that it works.

  Currently, users of 14.04 LTS with /etc/update-manager/release-
  upgrades's prompt set to normal are offered to upgrade to the
  unsupported release 14.10. In the past when 13.04 became unsupported
  before 12.10 we offered upgrades from 12.10 to 13.10. Skipping an
  unsupported release also puts us in a better position to ensure LTS to
  LTS upgrades work. Subsequently, update-manager and ubuntu-release-
  upgrader should be modified so that users can upgrade from 14.04 to
  15.04.

  The changes to update-manager will be generic enough to work going
  forward and the ubuntu-release-upgrader changes may require regular
  updates as a release becomes End of Life.

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