live-build/scripts/build/binary_checksums

#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2016-2020 The Debian Live team
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


set -e

# Including common functions
[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh

# Setting static variables
DESCRIPTION="Create binary checksums"
USAGE="${PROGRAM} [--force]"

# Processing arguments and configuration files
Init_config_data "${@}"

if [ "${LB_CHECKSUMS}" = "none" ]
then
	exit 0
fi

# Requiring stage file
Require_stagefiles config bootstrap

# Checking stage file
Check_stagefile

# Acquire lock file
Acquire_lockfile

for CHECKSUM in ${LB_CHECKSUMS}
do
	CHECKSUMS="${CHECKSUM}sum.txt"

	Echo_message "Begin creating binary ${CHECKSUMS}..."

	# Remove old checksums
	if [ -f binary/${CHECKSUMS} ]
	then
		rm -f binary/${CHECKSUMS}
	fi

	# Calculating checksums
	cd binary
	find . -type f \
		\! -path './isolinux/isolinux.bin' \
		\! -path './boot/boot.bin' \
		\! -path './boot/grub/stage2_eltorito' \
		\! -path './*SUMS' \
		\! -path './*sum.txt' \
		\! -path './*sum.README' \
	-print0 | LC_ALL=C sort -z | xargs -0 ${CHECKSUM}sum > ${CHECKSUMS}

cat > ${CHECKSUM}sum.README << EOF
The file ${CHECKSUMS} contains the ${CHECKSUM} checksums of all files on this medium.

You can verify them automatically with the 'verify-checksums' boot parameter,
or, manually with: '${CHECKSUM}sum -c ${CHECKSUMS}'.
EOF

	cd "${OLDPWD}"
done

# File list
cd binary
find . | sed -e 's|^.||g' | grep "^/" | LC_ALL=C sort > ../${LB_IMAGE_NAME}-${LB_ARCHITECTURE}.contents
cd "${OLDPWD}"

# Creating stage file
Create_stagefile