[Bug 2054741] Re: dpkg-buildpackage ignores DEB_BUILD_PROFILES

[Andreas Hasenack]

The autopkgtests look good now, but the test plan execution is very
vague:

> Verified that the packages in proposed work and solve the bug. Thanks!

Which versions? I would have to check what was in jammy and mantic
proposed on the day of this comment, assuming the test and the comment
were written on the same day.

Since the test plan is so easy to run, I'll do it myself.

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https://bugs.launchpad.net/bugs/2054741

Title:
  dpkg-buildpackage ignores DEB_BUILD_PROFILES

Status in dpkg package in Ubuntu:
  Fix Released
Status in dpkg source package in Jammy:
  Fix Committed
Status in dpkg source package in Mantic:
  Fix Committed
Status in dpkg source package in Noble:
  Fix Released

Bug description:
  [Impact]

  DEB_BUILD_PROFILES= can be used in Debian to specify a build profile
  to use with dpkg-buildpackage. We want to use it in the systemd
  project to build the upstream packages for the Ubuntu autopkgtest
  cloud CI on Github. But in the Ubuntu's fork of dpkg,
  DEB_BUILD_PROFILES's value is ignored and unconditionally swapped with
  'noudeb'. This makes it impossible to use package-specific profiles,
  and it's a regression w.r.t Debian.

  [Fix]

  Backport patch from Noble that fixes the issue: https://code.launchpad.net/~bluca/ubuntu/+source/dpkg/+git/dpkg/+merge/461136
  and takes into account if the environment variable is set when reading the profile

  [Test]

  To reproduce it, simply print the content of DEB_BUILD_PROFILES in
  d/rules in any package and build with DEB_BUILD_PROFILES=foo dpkg-
  buildpackage. Before the fix, whatever is passed via the env var is
  ignored. After the fix, it will be respected.

  [Regression Potential]

  dpkg-buildpackage is used to build all packages, so in case of
  unforeseen issues other packages could potentially fail to build. A
  unit test exercising this change is included in the patch to minimize
  potential for regressions.

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