[Bug 1640280] Re: Support Ubuntu uploads of .debs using control.tar.xz

[Colin Watson]

Actually, the dpkg task here is nonsense, sorry.  We don't use dpkg to
extract .debs in the uploader, only ar and python-apt.  We already have
a new enough version of python-apt, so I think that it's just a matter
of fixing up our explicit restrictions.

** No longer affects: dpkg (Ubuntu Precise)

** No longer affects: dpkg (Ubuntu)

** Tags added: lp-soyuz soyuz-upload trivial

** Changed in: launchpad
       Status: New => In Progress

** Changed in: launchpad
   Importance: Undecided => Low

** Changed in: launchpad
     Assignee: (unassigned) => Colin Watson (cjwatson)

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https://bugs.launchpad.net/bugs/1640280

Title:
  Support Ubuntu uploads of .debs using control.tar.xz

Status in Launchpad itself:
  In Progress

Bug description:
  Debian is considering switching to control.tar.xz by default:

    https://lists.debian.org/debian-dpkg/2016/07/msg00016.html

  The Ubuntu archive doesn't support this yet.  In order to do so, we
  need:

   * either an upgrade of Launchpad's upload processing hosts (pepo, haetae, and alphecca) to >=trusty, or a backport of control.tar.xz support to dpkg/precise-updates (the latter will be quicker)
   * a few minor changes to Launchpad's upload checks

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