** Description changed:

+ [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 
+ /usr/lib/ubuntu-advantage/apt-esm-json-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
+ 
+ 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
+ 
+ 
+ [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
+    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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https://bugs.launchpad.net/bugs/1927886

Title:
  xenial powerpc build failures golang dependency issues

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