diskimage-builder/diskimage_builder/elements/base/install.d/00-up-to-date

#!/bin/bash
# Fully upgrade everything on the system (if the package manager knows how to
# do it).

if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

if [ ${DIB_AVOID_PACKAGES_UPDATE} -eq 0 ]; then
    install-packages -u
fi