ubuntu-luks-autounlock/etc/initramfs-tools/hooks/prepare_auto_unlock_deps

#!/bin/sh
PREREQ=""
prereqs()
{
   echo "$PREREQ"
}

# These prerequisites are provided by the read-edid package. 
COPY_EXEC_LIST="/usr/bin/get-edid /usr/bin/parse-edid"

# These prerequisites are provided by the base system.
COPY_EXEC_LIST="$COPY_EXEC_LIST /sbin/iwlist"

# Explicitly specify all kernel modules because automatic dependency resolution
# is unreliable on many systems.
MANUAL_ADD_MODULES_LIST="iwlwifi iwlmvm iwldvm mac80211 cfg80211"

echo "Adding $MANUAL_ADD_MODULES_LIST for network detection"

# Generic result code.
RC=0

case $1 in
prereqs)
   prereqs
   exit 0
   ;;
esac

for ii in $COPY_EXEC_LIST
do
	if [ ! -x "$ii" ]
	then
		echo "Error: $ii is not executable."
		RC=2
	fi
done

if [ "$RC" -ne 0 ]
then
	exit "$RC"
fi

. /usr/share/initramfs-tools/hook-functions

for ii in $COPY_EXEC_LIST
do
	copy_exec "$ii"
done

for ii in $MANUAL_ADD_MODULES_LIST
do
	manual_add_modules "$ii"
done

mkdir -p ${DESTDIR}/lib/firmware
for ii in `find /lib/firmware/ -name 'iwlwifi-*'`
do
	cp -p $ii ${DESTDIR}/lib/firmware/
done

mkdir -p ${DESTDIR}/etc
cp -p /usr/local/etc/auto_unlock.conf ${DESTDIR}/etc/auto_unlock.conf