[Bug 1632072] [NEW] circular build dependency between ubuntu-release-upgrader and update-manager

[anarcat]

Public bug reported:

trying to build ubuntu-release-upgrader from scratch on another debian
platform gives an impossible build dependency:

Source: ubuntu-release-upgrader
Section: admin
Priority: optional
Maintainer: Ubuntu Developers <ubuntu-devel-discuss at lists.ubuntu.com>
Build-Depends: debhelper (>= 9), 
               python3-all,
               python3-distutils-extra, 
               python3-apt (>= 0.8.5~),
               lsb-release,
               python3-update-manager,
               apt-clone (>= 0.2.3~ubuntu2)

Source: update-manager
[...]
Package: python3-update-manager
Architecture: all
Section: python
Replaces: update-manager-core (<< 1:0.163)
Breaks: update-manager-core (<< 1:0.163)
Depends: ${python3:Depends},
         ${misc:Depends},
         python3-apt (>= 0.8.5~),
         python3-distupgrade,
         python3-launchpadlib,
         lsb-release

python3-distupgrade is a binary package of ... ubuntu-release-upgrader!
so to build ubuntu-release-upgrader, one needs python3-update-manager,
which cannot be installed because it depends on the python3-distupgrade
binary package, provided by the ubuntu-release-upgrader source package..

it seems to me the DistUpgrade library could be moved to python3-update-
manager or python3-apt, to resolve this loop.

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: update-manager (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: update-manager (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1632072

Title:
  circular build dependency between ubuntu-release-upgrader and  update-
  manager

Status in ubuntu-release-upgrader package in Ubuntu:
  New
Status in update-manager package in Ubuntu:
  New

Bug description:
  trying to build ubuntu-release-upgrader from scratch on another debian
  platform gives an impossible build dependency:

  Source: ubuntu-release-upgrader
  Section: admin
  Priority: optional
  Maintainer: Ubuntu Developers <ubuntu-devel-discuss at lists.ubuntu.com>
  Build-Depends: debhelper (>= 9), 
                 python3-all,
                 python3-distutils-extra, 
                 python3-apt (>= 0.8.5~),
                 lsb-release,
                 python3-update-manager,
                 apt-clone (>= 0.2.3~ubuntu2)

  Source: update-manager
  [...]
  Package: python3-update-manager
  Architecture: all
  Section: python
  Replaces: update-manager-core (<< 1:0.163)
  Breaks: update-manager-core (<< 1:0.163)
  Depends: ${python3:Depends},
           ${misc:Depends},
           python3-apt (>= 0.8.5~),
           python3-distupgrade,
           python3-launchpadlib,
           lsb-release

  python3-distupgrade is a binary package of ... ubuntu-release-
  upgrader! so to build ubuntu-release-upgrader, one needs python3
  -update-manager, which cannot be installed because it depends on the
  python3-distupgrade binary package, provided by the ubuntu-release-
  upgrader source package..

  it seems to me the DistUpgrade library could be moved to python3
  -update-manager or python3-apt, to resolve this loop.

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