[Bug 1719630] Re: unattended-upgrades uses dpkg-vendor but doesn't depend on dpkg-dev

[Balint Reczey]

Tested with 1.1ubuntu1.18.04.7~16.04.2 on Xenial:

root at x-uu-lp-1260041:~# dpkg -l unattended-upgrades | cat
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                Version                    Architecture Description
+++-===================-==========================-============-===========================================
ii  unattended-upgrades 1.1ubuntu1.18.04.7~16.04.2 all          automatic installation of security upgrades
root at x-uu-lp-1260041:~# grep dpkg-dev /var/lib/dpkg/info/unattended-upgrades.* ; echo $?
1
root at x-uu-lp-1260041:~# 


** Tags removed: verification-needed verification-needed-xenial
** Tags added: verification-done verification-done-xenial

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https://bugs.launchpad.net/bugs/1719630

Title:
  unattended-upgrades uses dpkg-vendor but doesn't depend on dpkg-dev

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Xenial:
  Fix Committed
Status in unattended-upgrades source package in Artful:
  Fix Released

Bug description:
  [Impact]

   * Unattended-upgrades may fail to install due to missing dpkg-vendor command.
   * The fix is using lsb_release which is provided by dependencies.

  [Test Case]

   * Install unattended-upgrades, then check the maintainer scripts to not have reference to dpkg-dev:
  $ grep dpkg-dev /var/lib/dpkg/info/unattended-upgrades.* ; echo $?
  1

  [Regression Potential]

   * lsb_release may fail but that would be a different, bigger issue affecting many other programs. This is unlikely.
   * Changed maintainer scripts may fail due to errors introduced with the fix. Since those scripts had extensive testing in later releases by now it looks like unlikely to occur, too.

  [Original Bug Text]

  in its postinst script unattended-upgrade uses dpkg-vendor from dpkg-
  dev but does not depends on dpkg-dev which results in the following
  error:

  # apt-get update && apt-get upgrade

  Installing the packages goes well, except for, getting this warning.

  Setting up unattended-upgrades (0.97ubuntu1) ...
  /var/lib/dpkg/info/unattended-upgrades.postinst: 65:
  /var/lib/dpkg/info/unattended-upgrades.postinst: dpkg-vendor: not found
  /var/lib/dpkg/info/unattended-upgrades.postinst: 66:
  /var/lib/dpkg/info/unattended-upgrades.postinst: dpkg-vendor: not found
  /var/lib/dpkg/info/unattended-upgrades.postinst: 124:
  /var/lib/dpkg/info/unattended-upgrades.postinst: dpkg-vendor: not found
  /var/lib/dpkg/info/unattended-upgrades.postinst: 125:
  /var/lib/dpkg/info/unattended-upgrades.postinst: dpkg-vendor: not found

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: unattended-upgrades 0.97ubuntu1
  ProcVersionSignature: Ubuntu 4.13.0-11.12-generic 4.13.1
  Uname: Linux 4.13.0-11-generic x86_64
  ApportVersion: 2.20.7-0ubuntu1
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Sep 26 10:01:05 2017
  InstallationDate: Installed on 2013-09-03 (1483 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130902)
  PackageArchitecture: all
  ProcEnviron:
   TERM=screen-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: unattended-upgrades
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.apt.apt.conf.d.50unattended-upgrades: [modified]
  mtime.conffile..etc.apt.apt.conf.d.50unattended-upgrades: 2017-09-05T01:34:04.573213

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