[ubuntu-mono] [Bug 972751] Re: package monodoc-base 2.10.8.1-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Iain Lane]

Thanks. We've had this bug a ton of times, but your terminal log is
minimal enough that I think I can see what's going on.

There's a trigger in monodoc-base to update the search index for the
installed documentation. As you upgraded monodoc-gtk2.0-manual, this
trigger was activated. That causes the postinst of monodoc-base to be
called, which does:

  case "$1" in
    […]

    triggered)

        /usr/bin/update-monodoc

        ;;

and update-monodoc (shipped in monodoc-base) calls

  monodoc --make-index > /dev/null

which crashes because gtk-sharp has been removed from the GAC (you can
see this earlier in the log)

  Preparing to replace libgtk2.0-cil 2.12.10-2ubuntu3 (using .../libgtk2.0-cil_2.12.10-2ubuntu4_amd64.deb) ...
  Removing libgtk2.0-cil from Mono

but the new version's postinst has not been run yet, because monodoc-
base does not depend on libgtk2.0-cil.

The monodoc binary is in the monodoc-browser package, and ends up
calling /usr/lib/mono/monodoc/browser.exe, which is also in monodoc-
browser. monodoc-browser does correctly depend on libgtk2.0-cil.

I think we should just move the trigger across from monodoc-base to
monodoc-browser, as we can't do anything if monodoc-browser is not
installed anyway. AFAICS dpkg guarantees that the Depends are satisfied
when processing triggers (quoting /usr/share/doc/dpkg-
dev/triggers.txt.gz)

  Packages in t-awaited and t-pending demand satisfaction of their
dependencies just like packages in installed.

The postinst in monodoc-base tries to take care of -browser not being
available

  if [ ! -x /usr/lib/monodoc/browser.exe -o -z "$(dpkg-query -W -f='${Status}' monodoc-browser 2>/dev/null | grep "ok installed")" ]; then
        exit 0
  fi

but this clearly does not work, and the rationale for trying to keep it
here is lost in the mists of time.

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https://bugs.launchpad.net/bugs/972751

Title:
  package monodoc-base 2.10.8.1-1ubuntu1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

Status in “mono” package in Ubuntu:
  New

Bug description:
  Just doing "apt-get upgrade"

  ProblemType: Package
  DistroRelease: Ubuntu 12.04
  Package: monodoc-base 2.10.8.1-1ubuntu1
  ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
  Uname: Linux 3.2.0-21-generic x86_64
  NonfreeKernelModules: zfs zcommon znvpair zavl zunicode
  ApportVersion: 2.0-0ubuntu4
  Architecture: amd64
  Date: Tue Apr  3 15:24:20 2012
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129.1)
  PackageArchitecture: all
  SourcePackage: mono
  Title: package monodoc-base 2.10.8.1-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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