mmdebstrap/tests/eatmydata-via-hook-dir

#!/bin/sh
set -eu
export LC_ALL=C.UTF-8
cat << SCRIPT > /tmp/checkeatmydata.sh
#!/bin/sh
set -exu
cat << EOF | diff - "\$1"/usr/bin/dpkg
#!/bin/sh
exec /usr/bin/eatmydata /usr/bin/dpkg.distrib "\\\$@"
EOF
[ -e "\$1"/usr/bin/eatmydata ]
SCRIPT
chmod +x /tmp/checkeatmydata.sh
# first four bytes: magic
elfheader="\\177ELF"
# fifth byte: bits
case "$(dpkg-architecture -qDEB_HOST_ARCH_BITS)" in
	32) elfheader="$elfheader\\001";;
	64) elfheader="$elfheader\\002";;
	*) echo "bits not supported"; exit 1;;
esac
# sixth byte: endian
case "$(dpkg-architecture -qDEB_HOST_ARCH_ENDIAN)" in
	little) elfheader="$elfheader\\001";;
	big) elfheader="$elfheader\\002";;
	*) echo "endian not supported"; exit 1;;
esac
# seventh and eigth byte: elf version (1) and abi (unset)
elfheader="$elfheader\\001\\000"
{{ CMD }} --mode=root --variant=apt \
	--customize-hook=/tmp/checkeatmydata.sh \
	--essential-hook=/tmp/checkeatmydata.sh \
	--extract-hook='printf "'"$elfheader"'" | cmp --bytes=8 - "$1"/usr/bin/dpkg' \
	--hook-dir=./hooks/eatmydata \
	--customize-hook='printf "'"$elfheader"'" | cmp --bytes=8 - "$1"/usr/bin/dpkg' \
	 {{ DIST }} /tmp/debian-chroot {{ MIRROR }}
 tar -C /tmp/debian-chroot --one-file-system -c . \
	 | tar -t \
	 | sort \
	 | grep -v '^\./var/lib/dpkg/diversions\(-old\)\?$' \
	 | diff -u tar1.txt -
rm /tmp/checkeatmydata.sh
rm -r /tmp/debian-chroot