[Bug 2054741] Re: dpkg-buildpackage ignores DEB_BUILD_PROFILES

[Luca Boccassi]

** Description changed:

+ [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.
+ 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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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:
  In Progress
Status in dpkg source package in Mantic:
  In Progress
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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