[Bug 1889470] Re: snap seed with channel breaks ubuntu-cpc:minimized builds on focal

[Timo Aaltonen]

Hello Robert, or anyone else affected,

Accepted livecd-rootfs into focal-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/livecd-
rootfs/2.664.5 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, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. 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 for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: livecd-rootfs (Ubuntu Focal)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1889470

Title:
  snap seed with channel breaks ubuntu-cpc:minimized builds on focal

Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Focal:
  Fix Committed

Bug description:
  [Impact]

   * Focal ubuntu-cpc:minimized builds fail (see Original Description)

  [Test Case]

   * build ubuntu-cpc:minimized
     * autopkgtest will catch this now, but didn't previously because the seed had yet to change

  [Regression Potential]

   * This is a very low risk change that is only in the code path
  ubuntu-cpc:minimized and the regression would require us to add a
  seeded snap that had a lxd=something that wasn't lxd, however the snap
  store doesn't allow '=' in name, so I think we're good.

  [Other Info]

   * None

  [Original Description]

  The seed now specifies the lxd snap in focal as
  'lxd=4.0/stable/ubuntu-20.04' which doesn't match the expectations of
  the code with looks for lxd as the only snap in the seed for minimized
  images.  This patch updates the pattern to accept 'lxd' or 'lxd=*'.

  The failure we see in the build is:

  W: No seed matching task cloud-image
  snap: considering required
  snap: considering minimal
  snap: considering standard
  snap: considering server
  snap: found lxd=4.0/stable/ubuntu-20.04
  Unexpected seeded snap for ubuntu-cpc:minimized build: lxd=4.0/stable/ubuntu-20.04
  Build failed

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