[Bug 1929201] Re: Packages in PPA are not installed if version higher than in a release pocket

[Steve Langasek]

(If so, I don't think this is a livecd-rootfs bug; livecd-rootfs
shouldn't be expected to override the archives wrt Task fields)

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Title:
  Packages in PPA are not installed if version higher than in a release
  pocket

Status in livecd-rootfs package in Ubuntu:
  New

Bug description:
  While trying to find a workaround for bug 1921862, we tried building a
  rootfs of Ubuntu Desktop from a PPA that contains a new version of
  ubiquity and zsys in focal.

  Current version in the archive:
   ubiquity | 20.04.15    | focal           
   ubiquity | 20.04.15.11 | focal-updates   
   zsys     | 0.4.5       | focal           
   zsys     | 0.4.8       | focal-updates   

  Versions in the PPA (https://launchpad.net/~jibel/+archive/ubuntu/ppa/+packages)
  ubiquity  | 20.04.15.12~ppa3
  zsys      | 0.4.8ubuntu1ppa1

  The results of the builds are:
  Without the PPA (same than an Ubuntu Desktop build without proposed)
  https://launchpad.net/~jibel/+livefs/ubuntu/focal/ubuntu-archive/+build/276788

  With the PPA
  https://launchpad.net/~jibel/+livefs/ubuntu/focal/ubuntu-archive/+build/276827

  The builds have been triggered with the API, the only difference is
  the metadata_override which contains the PPA:

  In [67]: livefs2.requestBuild(archive = archive, distro_arch_series = das, metadata_override= {'project': 'ubuntu'}, pocket='Updates')
  Out[67]: <livefs_build at https://api.launchpad.net/devel/~jibel/+livefs/ubuntu/focal/ubuntu-archive/+build/276788>

  In [68]: livefs2.requestBuild(archive = archive, distro_arch_series = das, metadata_override= {'project': 'ubuntu', 'extra_ppas' : ['jibel/ppa']}, pocket='Updates')
  Out[68]: <livefs_build at https://api.launchpad.net/devel/~jibel/+livefs/ubuntu/focal/ubuntu-archive/+build/276827>

  (archive is the primary archive)

  If you compare the 2 builds 
  ubiquity and zsys and in the first build but not the second.

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