+ # Update package lists (so they exist at all), so we can install
+ # software; if /var/lib/dpkg/available is empty, it was was probably
+ # cleaned by GRMLBASE/98-clean-chroot, so we need to rebuild it
+ # anyway
+ $ROOTCMD /usr/lib/dpkg/methods/apt/update /var/lib/dpkg/ apt apt
+
+ if ! $ROOTCMD test -x /usr/bin/aptitude ; then
+ # the apt-get update might return an error if there's for example
+ # a hashsum mismatch on Debian mirror sources, we might want to continue
+ # but should warn the user
+ if ! $ROOTCMD apt-get update ; then
+ echo "Warning: there was an error executing apt-get update, continuing anyway."
+ echo "Warning: there was an error executing apt-get update, continuing anyway." >&2
+ fi
+
+ $ROOTCMD apt-get -y install aptitude
+ fi
+
+ # make sure we can upgrade automatically,
+ # even with unsigned repos, but only if user wants it
+ if [ "${FAI_ALLOW_UNSIGNED:-}" = "1" ] ; then
+ APTGET_OPTS="${APTGET_OPTS:-} --allow-unauthenticated"
+ APTITUDE_OPTS="${APTITUDE_OPTS:-} --allow-untrusted"
+ fi
+
+ # make sure we don't fail when configuration files changed
+ APTGET_OPTS="${APTGET_OPTS:-} -o DPkg::Options::=--force-confdef -o DPkg::Options::=--force-confmiss -o DPkg::Options::=--force-confnew"
+ APTITUDE_OPTS="${APTITUDE_OPTS:-} -o DPkg::Options::=--force-confdef -o DPkg::Options::=--force-confmiss -o DPkg::Options::=--force-confnew"
+
+ if $ROOTCMD test -x /usr/bin/aptitude ; then
+ if $ROOTCMD aptitude --help | grep -q safe-upgrade ; then
+ APT_LISTCHANGES_FRONTEND=none APT_LISTBUGS_FRONTEND=none $ROOTCMD aptitude -y $APTITUDE_OPTS safe-upgrade
+ else
+ APT_LISTCHANGES_FRONTEND=none APT_LISTBUGS_FRONTEND=none $ROOTCMD aptitude -y $APTITUDE_OPTS upgrade