sd-card-images/scripts/build-debian

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#!/bin/sh
# Build Debian root filesystem
IMAGE2="$1" # For example "/artifacts/debian-buster-armhf"
ARCH="$2" # For example "armhf"
DIST="$3" # For example "buster"
set -e
case "${ARCH}" in
armhf)
KERNEL=linux-image-armmp
;;
arm64)
KERNEL=linux-image-arm64
;;
*)
echo "Can't decide kernel package for \"${ARCH}\""
exit 1
;;
esac
# Create fresh empty directory
TMP=$(mktemp -d tmp.XXXXXX)
cd "${TMP}"
# Build a Debian root filesystem (first stage)
debootstrap \
--arch="${ARCH}" \
--verbose \
--variant=minbase \
--foreign \
--include=\
netbase,\
ifupdown,\
net-tools,\
isc-dhcp-client,\
${KERNEL},\
systemd-sysv,\
u-boot-tools,\
openssh-server \
"${DIST}" \
debian \
"http://deb.debian.org/debian/"
# Randomly generated root password
PASSWORD=$(pwgen -B -A 6 1)
# Write apt sources config
case "${DIST}" in
sid)
tee debian/tmp/sources.list <<- EOF
deb http://deb.debian.org/debian ${DIST} main
deb-src http://deb.debian.org/debian ${DIST} main
EOF
;;
*)
tee debian/tmp/sources.list <<- EOF
deb http://deb.debian.org/debian ${DIST} main
deb-src http://deb.debian.org/debian ${DIST} main
deb http://deb.debian.org/debian ${DIST}-updates main
deb-src http://deb.debian.org/debian ${DIST}-updates main
deb http://security.debian.org/debian-security ${DIST}/updates main
deb-src http://security.debian.org/debian-security ${DIST}/updates main
EOF
;;
esac
cp -rv --preserve=mode ../2nd-stage-files/pre-2nd-stage-files/* debian
cp -rv --preserve=mode ../2nd-stage-files/pre-2nd-stage-files-${ARCH}/* debian
# Copy ARM emulation stuff
cp -v /usr/bin/qemu-*-static debian/usr/bin || :
# Build a Debian root filesystem (second stage)
chroot debian /bin/sh -e <<- EOF
/debootstrap/debootstrap --second-stage
/bin/mv /tmp/sources.list /etc/apt/sources.list
/usr/bin/apt-get update
/usr/bin/apt-get -y upgrade
/usr/bin/apt-get clean
/bin/rm -rf /var/lib/apt/lists/*
/bin/rm -f /var/log/*.log
/bin/echo root:${PASSWORD} | /usr/sbin/chpasswd
/bin/sed -i "s/#*\s*PermitRootLogin .*/PermitRootLogin yes/" /etc/ssh/sshd_config
EOF
# Remove ARM emulation stuff again
rm -v debian/usr/bin/qemu-*-static || :
cp -rv --preserve=mode ../2nd-stage-files/post-2nd-stage-files/* debian
# List all files
find debian ! -type d -printf "/%P\n" | sort > "/artifacts/debian-${DIST}-${ARCH}.files.txt"
# Make a ext4 filesystem of this and put it into the image
rm -f ext4.img
fallocate -l 900MiB ext4.img
mkfs.ext4 -d debian ext4.img
gzip ext4.img
cp -v ext4.img.gz "${IMAGE2}-${PASSWORD}.bin.gz"