[Bug 1775710] Re: snap preseeding in xenial not working

[Steve Langasek]

Hello Robert, or anyone else affected,

Accepted livecd-rootfs into xenial-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/livecd-
rootfs/2.408.33 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-xenial to verification-done-xenial. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-xenial. 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!

** Tags removed: verification-failed verification-failed-xenial
** Tags added: verification-needed-xenial

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https://bugs.launchpad.net/bugs/1775710

Title:
  snap preseeding in xenial not working

Status in livecd-rootfs package in Ubuntu:
  New
Status in livecd-rootfs source package in Xenial:
  Fix Committed

Bug description:
  [Impact]
  Customized images built for 16.04 with preseeded snaps fail.

  [Test case]
  1) Install livecd-rootfs
  2) Take a copy of the code tree for livecd-rootfs.
  3) Prepare a project/subproject tree for hooks:
  $ mkdir -p live-build/xyz/hooks/
  $ echo <<EOF > live-build/ubuntu-cpc/hooks/000-snap-preseed.binary
  #!/bin/sh

  . config/binary
  . config/functions.snaps

  snap_preseed chroot telegram
  EOF

  3) Build the image using livecd-rootfs:
  $ PROJECT=ubuntu-cpc SUBPROJECT=snapped lb config
  $ PROJECT=ubuntu-cpc SUBPROJECT=snapped lb build

  4) Validate that the image contains the preseeded snap as intended
  from stable/ubuntu-16.04 channel.

  [Regression potential]

  ---

  Snap preseeding released in 2.408.31 (bug #1771177) is incomplete.

  * Preseeding without specifying a channel will result in a build-break as distro-info is not installed in the build environment
  * Building with the ubuntu-cpc project overwrites the 'functions' file that added snap functions

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