#!/bin/sh

INSTALL_DRIVE=/dev/sda
PARTITION_BOOT=1
PARTITION_SWAP=2
PARTITION_ROOT=3
LABEL_BOOT=BOOT
LABEL_SWAP=SWAP
LABEL_ROOT=ROOT
MOUNT_PATH=/mnt
GIT_REPO=git://andreasbaumann.dyndns.org/cfenginetests.git

echo "Installing minimalistic base system.."

sgdisk -Z ${INSTALL_DRIVE}
sgdisk -a 2048 -o ${INSTALL_DRIVE}

sgdisk -n ${PARTITION_BOOT}:0:+100M ${INSTALL_DRIVE}
sgdisk -t ${PARTITION_BOOT}:ef02 ${INSTALL_DRIVE}
sgdisk -c ${PARTITION_BOOT}:"${LABEL_BOOT}" ${INSTALL_DRIVE}

sgdisk -n ${PARTITION_SWAP}:0:+900M ${INSTALL_DRIVE}
sgdisk -t ${PARTITION_SWAP}:8200 ${INSTALL_DRIVE}
sgdisk -c ${PARTITION_SWAP}:"${LABEL_SWAP}" ${INSTALL_DRIVE}

sgdisk -n ${PARTITION_ROOT}:0:0 ${INSTALL_DRIVE}
sgdisk -t ${PARTITION_ROOT}:8300 ${INSTALL_DRIVE}
sgdisk -c ${PARTITION_ROOT}:"${LABEL_ROOT}" ${INSTALL_DRIVE}

sgdisk -G ${INSTALL_DRIVE}

mkswap ${INSTALL_DRIVE}${PARTITION_SWAP}
swapon ${INSTALL_DRIVE}${PARTITION_SWAP}
mkfs.ext4 ${INSTALL_DRIVE}${PARTITION_ROOT}

mkdir -p ${MOUNT_PATH}
mount ${INSTALL_DRIVE}${PARTITION_ROOT} ${MOUNT_PATH}

export http_proxy=http://192.168.1.12:3128
export no_proxy=localhost,10.0.2.2

# use our local cache
sed -i '/\[core\]/aServer = http://10.0.2.2:8080/$repo/os/$arch' /etc/pacman.conf
sed -i '/\[extra\]/aServer = http://10.0.2.2:8080/$repo/os/$arch' /etc/pacman.conf
sed -i '/\[community\]/aServer = http://10.0.2.2:8080/$repo/os/$arch' /etc/pacman.conf

# switch off signature for now
sed -i 's/^SigLevel.*/SigLevel = Never/g' /etc/pacman.conf

pacstrap ${MOUNT_PATH} filesystem grep findutils coreutils glibc bash pacman mkinitcpio kernel26 dhcpcd

# use our local cache in installed pacman
sed -i '/\[core\]/aServer = http://10.0.2.2:8080/$repo/os/$arch' ${MOUNT_PATH}/etc/pacman.conf
sed -i '/\[extra\]/aServer = http://10.0.2.2:8080/$repo/os/$arch' ${MOUNT_PATH}/etc/pacman.conf
sed -i '/\[community\]/aServer = http://10.0.2.2:8080/$repo/os/$arch' ${MOUNT_PATH}/etc/pacman.conf

# add our local packages into a separate repository
printf "\n[aba]\nServer = http://10.0.2.2:8080/\044repo/os/\044arch\n" >> ${MOUNT_PATH}/etc/pacman.conf

# synchronize package databases for installed pacman
arch-chroot ${MOUNT_PATH} pacman -Sy

# switch off signature for now in installed pacman
sed -i 's/^SigLevel.*/SigLevel = Never/g' ${MOUNT_PATH}/etc/pacman.conf

arch-chroot ${MOUNT_PATH} pacman --noconfirm -S grub-bios
arch-chroot ${MOUNT_PATH} grub-install --target=i386-pc --recheck ${INSTALL_DRIVE}
cp ${MOUNT_PATH}/usr/share/locale/en@quot/LC_MESSAGES/grub.mo ${MOUNT_PATH}/boot/grub/locale/en.mo
# disable quiet mode, set text mode instead of graphical mode
# also ban cirrus KVM
# set correct path of systemd binary (symlink /sbin/init has gone)
sed -i 's/GRUB_CMDLINE_LINUX_DEFAULT="quiet"/GRUB_CMDLINE_LINUX_DEFAULT="modprobe.blacklist=cirrus init=\/usr\/lib\/systemd\/systemd"/g' ${MOUNT_PATH}/etc/default/grub
sed -i 's/GRUB_GFXMODE=auto/GRUB_GFXMODE=text/g' ${MOUNT_PATH}/etc/default/grub
sed -i 's/#GRUB_TERMINAL_OUTPUT=console/GRUB_TERMINAL_OUTPUT=console/g' ${MOUNT_PATH}/etc/default/grub

arch-chroot ${MOUNT_PATH} grub-mkconfig -o /boot/grub/grub.cfg

genfstab -p ${MOUNT_PATH} >> ${MOUNT_PATH}/etc/fstab

sed -i 's/^#en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/g' ${MOUNT_PATH}/etc/locale.gen
arch-chroot ${MOUNT_PATH} locale-gen
echo LANG=en_US.UTF-8 > ${MOUNT_PATH}/etc/locale.conf

ln -s /usr/share/zoneinfo/Europe/Zurich ${MOUNT_PATH}/etc/localtime
arch-chroot ${MOUNT_PATH} hwclock --systohc --utc

echo "archiso" > ${MOUNT_PATH}/etc/hostname

arch-chroot ${MOUNT_PATH} systemctl enable dhcpcd@ens3.service

arch-chroot ${MOUNT_PATH} sh -c "echo 'root:xx' | chpasswd"

# synchronized time is a requirement, install and configure ntp
# we use a standard NTP server, later we can change that via cfengine
arch-chroot ${MOUNT_PATH} pacman --noconfirm -S ntp
arch-chroot ${MOUNT_PATH} ntpdate 0.pool.ntp.org
arch-chroot ${MOUNT_PATH} systemctl enable ntpd.service

# monitord needs netstat
arch-chroot ${MOUNT_PATH} pacman --noconfirm -S net-tools

# we use 'git' to manage our promises
arch-chroot ${MOUNT_PATH} pacman --noconfirm -S git-core

arch-chroot ${MOUNT_PATH} pacman --noconfirm -S cfengine

# install rules for the machine from git
arch-chroot ${MOUNT_PATH} git clone ${GIT_REPO} /srv/cfengine/masterfiles

# create machine keys
arch-chroot ${MOUNT_PATH} cf-key

# enable cfengine
arch-chroot ${MOUNT_PATH} systemctl enable cf-execd.service
arch-chroot ${MOUNT_PATH} systemctl enable cf-monitord.service
arch-chroot ${MOUNT_PATH} systemctl enable cf-serverd.service

echo "Done."

systemctl poweroff