[Bug 1450257] Update Released

[Brian Murray]

The verification of the Stable Release Update for live-build has
completed successfully and the package has now been released to
-updates.  Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report.  In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.

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https://bugs.launchpad.net/bugs/1450257

Title:
  Modify cdimage build process to allow pin priorities for EXTRA_PPAs

Status in Ubuntu CD image build software:
  Fix Released
Status in live-build package in Ubuntu:
  Fix Released
Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in live-build source package in Vivid:
  Fix Released
Status in livecd-rootfs source package in Vivid:
  Fix Released

Bug description:
  [ SRU Justification ]
  For the Phone stable overlay PPA, there's a need to occasionally have a package in the PPA older than those in stable-updates or stable-security.  Other consumers of the EXTRA_PPA facility could also make use of this from time to time to pin things above or below defaults, as seems fit.

  The method specced out at the core sprint was to extend the extra_ppas
  syntax from user/ppa to user/ppa:priority, with a lack of ":priority"
  being treated as the default, both for simplicity and backward
  compatibility.

  [ Test Case ]
  Build a livefs with several extra_ppas at different pin levels (and with no pin at all), to make sure they all behave as expected, including forcefully downgrading for pins over 1000.  This has already been done here, however it can be done again with the final uploads, when they're in -proposed:

  https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/vivid/ubuntu-
  core/+build/25929

  [ Regression Potential ]
  Very slim, given the above testing.  Builds without extra_ppas are entirely unaffected, and testing shows (and will show again, when repeated with the distro uploads) that extra_ppas specced without the :priority suffix are treated the same as they were before.

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