linux/debian/templates/image.preinst.in

#!/bin/sh
set -e

if [ "$1" = abort-upgrade ] ; then exit 0 ; fi

version='@abiname@@localversion@'
image_path="/boot/@image-stem@-${version}"

if [ "$1" = install ]; then
    # Create a flag file for postinst
    mkdir -p "/lib/modules/${version}"
    touch "/lib/modules/${version}/.fresh-install"
fi

if [ -d /etc/kernel/preinst.d ] ; then
    DEB_MAINT_PARAMS="$*" \
    run-parts --report --exit-on-error \
      "--arg=${version}" \
      "--arg=${image_path}" \
    /etc/kernel/preinst.d
fi

exit 0