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[Launchpad Bug Tracker <1927886@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package ubuntu-advantage-tools - 27.1~16.04.1

---------------
ubuntu-advantage-tools (27.1~16.04.1) xenial; urgency=medium

  * Backport new upstream release: (LP: #1929597) to xenial

 -- Lucas Moura <lucas.moura@xxxxxxxxxxxxx>  Thu, 27 May 2021 15:40:20
-0300

** Changed in: ubuntu-advantage-tools (Ubuntu Xenial)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1927886

Title:
  xenial powerpc build failures golang dependency issues

Status in ubuntu-advantage-tools package in Ubuntu:
  Fix Released
Status in ubuntu-advantage-tools source package in Xenial:
  Fix Released
Status in ubuntu-advantage-tools source package in Bionic:
  Fix Released
Status in ubuntu-advantage-tools source package in Focal:
  Fix Released
Status in ubuntu-advantage-tools source package in Groovy:
  Fix Released
Status in ubuntu-advantage-tools source package in Hirsute:
  Fix Released
Status in ubuntu-advantage-tools source package in Impish:
  Fix Released

Bug description:
  [Impact]

   * Local package build attempts on powerpc platform as well as cloud
  image builds for powerpc on Xenial were affected by inability to
  resolve correct golang dependencies. Allowing debian/control and
  package Makefiles to ignore building and packaging ubuntu-advantage-
  tools' golang hook binary allows for package builds to succeed with
  minimal impact to usability and user-messaging.

  [Test Plan]

  1. Run sbuild --resolve-alternatives --dist=xenial --arch=powerpc to confirm package build success and does not include golang dependencies or
  /usr/lib/ubuntu-advantage/apt-esm-json-hook
  dpkg-deb -c *powerpc.deb | grep hook  # expect only apt-esm-hook

  2. Upload to ppa:ua-client/staging which is set to build both powerpc
  and riscv64 platforms by default and ensure no package build failures.

  3. Ensure go APT hook is still built and included in binary package as
  /usr/lib/ubuntu-advantage/apt-esm-json-hook
  dpkg-deb -c *amd64.deb | grep hook  # expect both apt-esm-hook & apt-esm-json-hook

  4. Test functionality of go json hook on Xenial:

  4a. get token from ubuntu.com/advantage
  4b. ua attach <token_from_4a>
  4c ua disable esm-infra
  4d apt upgrade  # check output for esm-infra package updates available.

  [Where problems could occur]

  * This is a low risk update as most problems will occur at package
  build time.

  * Accidental exclusion of /usr/lib/ubuntu-advantage/apt-esm-json-hook
  only results in the absence of a single informative message during
  `apt upgrade` or `apt dist-upgrade` which would describe detailed
  source for where package updates are originating:

  "1 standard security update, 1 esm-infra update and 2 esm-apps
  updates"

  * Without a packaged json hook, the message will be absent and no
  tracebacks or non-zero exits from APT

   * [racb] Mutating the Build-Depends line could cause alternatives to
  be resolved differently on the buildds, resulting in toolchain changes
  that might result in different sets of build failures or different
  build output causing functional issues.

  [Other Info]

  [Original Description]

   * Anything else you think is useful to include
   * Anticipate questions from users, SRU, +1 maintenance, security teams and the Technical Board
   * and address these questions in advance

  ubuntu-advantage-tools 27.0~16.04.1 fails to build from source in PPAs
  or locally via sbuild on powerpc platform due to golang package
  dependency issues:

  $ sbuild --resolve-alternatives --dist=xenial --arch=powerpc --arch-all ../out/ubuntu-advantage-tools_27.0~16.04.1.dsc
  ....

  Merged Build-Depends: bash-completion, debhelper (>= 9), debianutils, dh-python, dh-systemd | debhelper (>= 13.3), gettext, git, golang, libapt-pkg-dev, po-debconf, python3 (>= 3.4), distro-info, python3-flake8, python3-mock, python3-pytest, python3-setuptools, python3-yaml, build-essential, fakeroot
  Filtered Build-Depends: bash-completion, debhelper (>= 9), debianutils, dh-python, dh-systemd | debhelper (>= 13.3), gettext, git, golang, libapt-pkg-dev, po-debconf, python3 (>= 3.4), distro-info, python3-flake8, python3-mock, python3-pytest, python3-setuptools, python3-yaml, build-essential, fakeroot
  dpkg-deb: building package 'sbuild-build-depends-main-dummy' in '/<<RESOLVERDIR>>/apt_archive/sbuild-build-depends-main-dummy.deb'.
  Ign:1 copy:/<<RESOLVERDIR>>/apt_archive ./ InRelease
  Get:2 copy:/<<RESOLVERDIR>>/apt_archive ./ Release [957 B]
  Ign:3 copy:/<<RESOLVERDIR>>/apt_archive ./ Release.gpg
  Get:4 copy:/<<RESOLVERDIR>>/apt_archive ./ Sources [481 B]
  Get:5 copy:/<<RESOLVERDIR>>/apt_archive ./ Packages [565 B]
  Fetched 2003 B in 0s (9192 B/s)
  Reading package lists...
  Reading package lists...

  Install main build dependencies (apt-based resolver)
  ----------------------------------------------------

  Installing build dependencies
  Reading package lists...
  Building dependency tree...
  Reading state information...
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:

  The following packages have unmet dependencies:
   sbuild-build-depends-main-dummy : Depends: golang but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  apt-get failed.
  E: Package installation failed

  ...
     missing:
       pkg:
        package: golang:powerpc
        version: 2:1.6-1ubuntu4
        architecture: all
        essential: false
        unsat-dependency: golang-src:powerpc (>= 2:1.6-1ubuntu4)
       depchains:
        -
         depchain:
          -
           package: sbuild-build-depends-main-dummy:powerpc
           version: 0.invalid.0
           architecture: powerpc
           essential: false
           depends: golang:powerpc

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