autopkgtest-build-lxd: check for existing image early

[Heinrich Schuchardt]

autopkgtest-build-lxd fails if an image already exists with an error like

    Error: Aliases already exists: autopkgtest/ubuntu/noble/amd64

*after* creating the new image which takes a considerable amount of time.

This is wasting user time. It would be preferable to have an early check and recommend to the user to use 'lxc image delete' if he wishes to recreate the image.

We might additionally consider adding a --force parameter allowing to overwrite images.

[Paride Legovini (paride)]

This is implemented already since autopkgtest 5.30 [1], but broken as a side effect of LP: #2069274.

[1] https://salsa.debian.org/ci-team/autopkgtest/-/commit/9d2ae95ba54d4db0e5e6d39ed7ca967152df5c1d

[Launchpad Janitor (janitor)]

This bug was fixed in the package autopkgtest - 5.37ubuntu2

---------------
autopkgtest (5.37ubuntu2) oracular; urgency=medium

  * New delta, all upstream cherry-picks:
    - t/autopkgtest-build-docker: use ports.ubuntu.com on non-amd64 Ubuntu
    - t/autopkgtest: test_git_source_build: skip if remote repo is unreachable
    - d/t/lxd: restrict architectures via Architecture and enable arm64
    - d/rules: don't run pre-commit at package build time

 -- Paride Legovini <email address hidden> Wed, 26 Jun 2024 13:16:53 +0200