File: preinst.pre

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# preinst.pre
# $Id: preinst.pre 5047 2012-02-17 06:41:24Z preining $
# we want to be sure that experimental versions are purged before
# the first unstable is installed
# furthermore check that we are at least at version 2005 for the 
# temporary tetex packages upgrades
case "$1" in
  upgrade|install)
    old_version=$2
    if [ -n "$old_version" ] && dpkg --compare-versions "$old_version" lt 2005-2 && dpkg --compare-versions "$old_version" gt 2005 ; then
      echo "Upgrade from experimental versions are not supported!" >&2
      echo "Please purge all texlive packages before installation." >&2
      exit 1
    fi
    ;;
esac

# end preinst.pre