ZFSBootMenu-Root-Install/post-inst.sh

#!/bin/bash
set -euo pipefail


BASEDIR="$(dirname "${0}" | sed "s|^\.|${PWD}|")"


printf \
	'\033[?47l\012'

cat << EOF
#######################################
##                                   ##
##  $(cat "${BASEDIR}/title") Script  ##
##                                   ##
##   Jean  <jean@easthighnerd.net>   ##
##                                   ##
#######################################


####################
##                ##
##      Post      ##
##  Installation  ##
##                ##
####################

EOF


source \
	/etc/os-release

source \
	"${BASEDIR}/system.conf"


if [[ ! "${*}" = *--no-part* ]]; then
	zfs create\
		${HOSTNAME,,}/home/${USERNAME}

	zfs create\
		${HOSTNAME,,}/home/${USERNAME}/.config

	zfs create\
		-o canmount=off\
		${HOSTNAME,,}/home/${USERNAME}/.var

	zfs create\
		${HOSTNAME,,}/home/${USERNAME}/.var/app

	zfs create\
		-o canmount=off\
		${HOSTNAME,,}/home/${USERNAME}/.local

	zfs create\
		-o canmount=off\
		${HOSTNAME,,}/home/${USERNAME}/.local/share

	zfs create\
		${HOSTNAME,,}/home/${USERNAME}/.local/share/flatpak

	printf \
		'Adding user account...\n'

	adduser ${USERNAME}
else
	adduser --no-create-home ${USERNAME}
fi

if [[ "${ID}" == 'fedora' ]]; then
	printf \
		'\033[?47h\033[2J\033[H'

	cat << EOF

Enter a password for the new user account:
EOF
	passwd \
		${USERNAME}

	printf \
		'\033[?47l'

	usermod \
		-a \
		-G \
		audio,cdrom,dip,floppy,wheel,video,dialout \
		${USERNAME}
else
	usermod \
		-a \
		-G \
		audio,cdrom,dip,floppy,netdev,plugdev,sudo,video,dialout,lpadmin \
		${USERNAME}
fi

if [[ "${ID}" == 'elementary' ]]; then
	cat << EOF > /etc/apt/sources.list.d/backports.list
deb http://archive.ubuntu.com/ubuntu/ ${UBUNTU_VERSION_CODENAME}-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ ${UBUNTU_VERSION_CODENAME}-backports main restricted universe multiverse
EOF

	cat << EOF > /etc/apt/preferences.d/backports.pref
Package: *
Pin: release n=${UBUNTU_VERSION_CODENAME}*
Pin-Priority: 990

Package: linux* /wayland/
Pin: release n=${UBUNTU_VERSION_CODENAME}-backports
Pin-Priority: -1
EOF
elif [[ "${ID}" == 'debian' ]]; then
	cat << EOF | tee /etc/apt/sources.list.d/backports.sources &> /dev/null
Enabled:		yes
Types:			deb deb-src
URIs:			http://deb.debian.org/debian/
Suites:			${VERSION_CODENAME}-backports
Components:		main non-free-firmware contrib
Signed-By:		/usr/share/keyrings/debian-archive-keyring.gpg
EOF

	cat << EOF | tee /etc/apt/preferences.d/backports.pref &> /dev/null
Package: *
Pin: release n=${VERSION_CODENAME}*
Pin-Priority: 990
EOF

	if [[ "${VERSION_CODENAME}" == 'bookworm' ]]; then
	cat << EOF | tee --append /etc/apt/preferences.d/backports.pref &> /dev/null

Package: /wayland/
Pin: release n=${VERSION_CODENAME}-backports
Pin-Priority: -1
EOF
	fi
fi

if [[ "${ID}" == 'debian' ]] || [[ "${ID}" == 'elementary' ]]; then
	apt \
		dist-upgrade \
		--yes
fi

if [[ "${ID}" == 'elementary' ]]; then
	apt \
		install \
		--yes \
		--autoremove \
		elementary-desktop
elif [[ "${ID}" = 'debian' ]]; then
	if [[ ! -f /usr/bin/tasksel ]]; then
		apt \
			install \
			--yes \
			tasksel
	fi

	tasksel \
		--new-install
fi

if [[ "${ID}" == 'debian' ]] || [[ "${ID}" == 'elementary' ]]; then
	for file in /etc/logrotate.d/* ; do
		if grep -Eq "(^|[^#y])compress" "$file" ; then
			sed -i -r "s/(^|[^#y])(compress)/\1#\2/" "$file"
		fi
	done

	cat << EOF | tee /usr/bin/zfs-system-snapshot-apt &> /dev/null
#!/bin/bash
set -euo pipefail


TIMESTAMP="\$(date +%Y_%m_%d-%H_%M_%S)"


if [[ -z "\$(zfs list -t snapshot | grep 'apt-\${TIMESTAMP}')" ]]; then
    zfs snapshot \$(zfs mount | grep 'ROOT' | sed 's| .*||')@apt-\${TIMESTAMP} && printf "\n- Snapshot taken\n\n"
fi
EOF

	chmod \
		+x \
		/usr/bin/zfs-system-snapshot-apt

	printf \
		'DPkg::Pre-Install-Pkgs {"/usr/bin/zfs-system-snapshot-apt";};\n' | \
		tee /etc/apt/apt.conf.d/90-zfs_system-snapshot &> /dev/null

	printf \
		'DPkg::Post-Invoke {"apt moo";};\n' | \
		tee /etc/apt/apt.conf.d/99-apt_moo &> /dev/null
fi

if [[ ! "${*}" = *--no-part* ]]; then
	cat << EOF | tee /usr/bin/home-fix.sh &> /dev/null
#!/bin/bash
set -euo pipefail

chown -R ${USERNAME}:${USERNAME} /home/${USERNAME}

sudo -u ${USERNAME} cp -a /etc/skel/. /home/${USERNAME}

if [[ ! -z "$(find -P /home/${USERNAME}/ | grep '\.face')" ]]; then
	find -P /home/${USERNAME}/ | grep '\.face' | xargs -d '\n' -I {} rm {}
fi

if [[ ! -z "\$(find -P /var/spool/cron | grep 'root')" ]]; then
    rm \$(find -P /var/spool/cron | grep 'root')
fi

printf "\$(date +%Y-%m-%d\ %H:%M:%S) I did the thing\n" | tee /var/log/home-fix.log &> /dev/null

if [[ -f '/usr/bin/home-fix.sh' ]]; then
    rm /usr/bin/home-fix.sh
fi

zfs snapshot ${HOSTNAME,,}/ROOT/${ID}@home-fix

zfs snapshot -r ${HOSTNAME,,}/home/${USERNAME}@home-fix
EOF

	chmod \
		+x \
		/usr/bin/home-fix.sh

	if [[ "${ID}" == 'fedora' ]]; then
		printf \
			'@reboot /usr/bin/home-fix.sh\n' | \
			tee /var/spool/cron/root &> /dev/null
	elif [[ "${ID}" == 'debian' ]]; then
		printf \
			'@reboot /usr/bin/home-fix.sh\n' | \
			tee /var/spool/cron/crontabs/root &> /dev/null

		chown \
			:crontab \
			/var/spool/cron/crontabs/root

		chmod \
			0600 \
			/var/spool/cron/crontabs/root
	fi
fi

zfs \
	snapshot \
	${HOSTNAME,,}/ROOT/${ID}@post-install

printf \
	'\033[?47h\033[2J\033[H'

cat << EOF

Script has finished running

Please reboot your computer

Press any key to return to the main menu
EOF

read -srn 1