#/bin/sh

# arch-create-system
# https://github.com/rzerres/arch-create-vm
# Copyright (C) 2019 Ralf Zerres

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,

# -------------------------------------------------------------------------

progname="${0##*/}"
version="0.1.0"

# global variables
color=1
config_json="$progname.json"
dryrun=0
quiet=0
verbose=0


# ascii color
BLUE=
GREEN=
MAGENTA=
RED=
YELLOW=
NO_COLOR=

###
# Functions
###
echo () { printf %s\\n "$*" ; }

check_prerequisites () {
    # requested binaries:
    which chattr >/dev/null 2>&1 || { printf "'chattr' is not installed." && exit 1; }
    which btrfs >/dev/null 2>&1 || { printf "'btrfs' is not installed." && exit 1; }
    which fallocate >/dev/null 2>&1 || { printf "'findmnt' is not installed." && exit 1; }
    which gawk >/dev/null 2>&1 || { printf "'gawk' is not installed." && exit 1; }
    which mkfs >/dev/null 2>&1 || { printf "'mkfs' is not installed." && exit 1; }
    which mkswap >/dev/null 2>&1 || { printf "'mkswap' is not installed." && exit 1; }
    which mount >/dev/null 2>&1 || { printf "'mount' is not installed." && exit 1; }
    which pacman >/dev/null 2>&1 || { printf "'pacman' is not installed." && exit 1; }
    which pacstrap >/dev/null 2>&1 || { printf "'pacstrap' is not installed." && exit 1; }
    which sed >/dev/null 2>&1 || { printf "'sed' is not installed." && exit 1; }
    which sgdisk >/dev/null 2>&1 || { printf "'sgdisk' is not installed." && exit 1; }
    which umount >/dev/null 2>&1 || { printf "'umount' is not installed." && exit 1; }

    if [ $(id -u) -ne 0 ] ; then printf "$progname: must be run as root\n" ; exit 1 ; fi
}

create_bootloader () {
	cmd="bootctl --path=boot install"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi

	cmd="bootctl status"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi
}

create_btrfs () {
	local LABEL=$1
	local PREFIX=${2:-BTRFS}
	local MOUNT_POINT=$3


	if [ $dryrun -eq 1 ]; then
		printf "${BLUE}Would prepare filesystem ${GREEN}'%s'${NO_COLOR}\n" \
			"$LABEL"
	else
		printf "${BLUE}Prepare filesystem ${GREEN}'%s'${NO_COLOR}\n" \
			"$LABEL"
	fi

	if [ -h /dev/disk/by-partlabel/$LABEL ]; then

		# create filesystem
		cmd="mkfs -t btrfs --force \
			--label $PREFIX-$LABEL \
			--data single \
			--metadata single \
			/dev/disk/by-partlabel/$LABEL"
		cmd=`echo $cmd | tr -s "[:blank:]"`
		if [ $dryrun -eq 1 ]; then
			printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n"  \
				"$cmd"
		else
			eval "$cmd"
		fi

		if [ ! -d $MOUNT_POINT ]; then
			cmd="mkdir -p $MOUNT_POINT"
			if [ $dryrun -eq 1 ]; then
				printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n"  \
					"$cmd"
			else
				eval "$cmd"
			fi
		fi
	fi
}

create_disk () {
	local TARGET=$1
	local LABEL=$2
	local PREFIX=$3
	local NR_PARTITIONS=${4:-1}

	local MOUNT_TARGET=/mnt
	local SGDISK="/usr/bin/sgdisk"
	local PARTITION=1

	# test if block-device is available
	test -b $TARGET || exit 1

	printf "${BLUE}Prepare disc ${GREEN}'%s'${NO_COLOR}\n" "$TARGET"

	# Cleanup disk and create GPT-Partition
	cmd="sgdisk --zap-all $TARGET"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi

	while expr $PARTITION '<=' $NR_PARTITIONS >>/dev/null; do
		if [ $PARTITION '=' 1 ] && [ $NR_PARTITIONS '>' 1 ]; then
			if [ $dryrun -eq 1 ]; then
				printf "${MAGENTA}Would create ${GREEN}UEFI-Partition '%s'${NO_COLOR}\n" $PARTITION
			else
				# create UEFI partitions
				sgdisk --new=$PARTITION:2048:+512M $TARGET

				# assign label
				sgdisk --change-name=$PARTITION:$label_uefi $TARGET

				# adapt partition-type
				sgdisk --typecode=$PARTITION:EF00 $TARGET
			fi

			PARTITION=$(expr $PARTITION + 1)
			continue
		else
			if [ $dryrun -eq 1 ]; then
				printf "${MAGENTA}Would create ${GREEN}OS-Partition '%s'${NO_COLOR}\n" $PARTITION
			else
				# create partitions
				sgdisk --new=$PARTITION $TARGET

				# assign label
				sgdisk --change-name=$PARTITION:${LABEL} $TARGET

				# adapt partition-type
				sgdisk --typecode=$PARTITION:8300 $TARGET
			fi

			PARTITION=$(expr $PARTITION + 1)
		fi
	done

	# dump settings
	cmd="sgdisk -p $TARGET"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would print created partition table for target ${GREEN}'%s'${NO_COLOR}\n" $TARGET
	else
		eval "$cmd"
	fi
}


create_fs_structure () {
	local LABEL=$1
	local PREFIX=${2:-BTRFS}
	local MOUNT_POINT=$3
	local SUBVOL=$4

	printf "${BLUE}Prepare filesystem structure${GREEN}'subvol=%s'${NO_COLOR}\n" \
		"$SUBVOL"
	cmd="mount_target $MOUNT_POINT /dev/disk/by-partlabel/$LABEL btrfs $SUBVOL"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi


	if [ $LABEL="OS" ]; then
		printf "${BLUE}Create target filesystem structure${NO_COLOR}\n"

		cmd="mkdir -p $MOUNT_POINT/var/lib"
		if [ $dryrun -eq 1 ]; then
			printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
		else
			eval "$cmd"
		fi

		for subdir in log cache; do
			cmd="btrfs subvolume create  $MOUNT_POINT/var/$subdir"
			if [ $dryrun -eq 1 ]; then
				printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
			else
				eval "$cmd"
			fi
		done

		# Subvolumes storing custom data
		printf "${BLUE} - Create btrfs subvolumes${NO_COLOR}\n"

		for subvol in boot root home data var/lib/machines; do
			cmd="btrfs subvolume create $MOUNT_POINT/$subvol"
			if [ $dryrun -eq 1 ]; then
				printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" \
					"$cmd"
			else
				eval "$cmd"
			fi
		done

		create_swapfs $PREFIX $MOUNT_POINT
	fi

	cmd="umount $MOUNT_POINT"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi
}

create_network_stack () {

	systemctl enable systemd-networkd
	systemctl enable systemd-resolved

	rm /etc/resolv.conf
	ln -s /run/systemd/resolve/resolv.con /etc/resolv.conf

	systemctl enable dropbear.service
}

create_swapfs () {
	local PREFIX=$1
	local MOUNT_POINT=$2

	printf "${BLUE}Create target swapfs${NO_COLOR}\n"

	# create a subvolume for the swapfs file
	cmd="btrfs subvol create $MOUNT_POINT/swap"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi


	# Disable COW functionality for Subvolume swap
	cmd="chattr +C $MOUNT_POINT/swap"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
		chmod 0700 $MOUNT_POINT/swap
	fi

	# prepare the swapfile (size: 2x RAM)
	RamSize=`cat /proc/meminfo | gawk 'NR==1 {print $2}'`
	SwapSize=$(expr 2 '*' $RamSize)
	SwapFile=$MOUNT_POINT/swap/swapfile

	cmd="fallocate --length $SwapSize $SwapFile"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		touch $SwapFile
		chmod 0600 $SwapFile
		eval "$cmd"
	fi

	# create the swap filesystem
	cmd="mkswap --label $PREFIX-Swap $SwapFile"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi
}

create_fat () {
	local LABEL=$1
	local PREFIX=${2:-BTRFS}
	local MOUNT_POINT=$3

	if [ $dryrun -eq 1 ]; then
		printf "${BLUE}Would prepare filesystem ${GREEN}'%s'${NO_COLOR}\n" "$LABEL"
	else
		printf "${BLUE}Prepare filesystem ${GREEN}'%s'${NO_COLOR}\n" "$LABEL"
	fi

	if [ -h /dev/disk/by-partlabel/$LABEL ]; then
		# create filesystem
		cmd="mkfs -t fat \
			-F 32 \
			-n $LABEL \
			/dev/disk/by-partlabel/$LABEL"
		cmd=`echo $cmd | tr -s "[:blank:]"`
		if [ $dryrun -eq 1 ]; then
			printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
		else
			eval "$cmd"
		fi
	fi
}

create_vfat () {
	local LABEL=$1
	local PREFIX=${2:-BTRFS}
	local MOUNT_POINT=$3

	if [ $dryrun -eq 1 ]; then
		printf "${BLUE}Would prepare filesystem ${GREEN}'%s'${NO_COLOR}\n" "$LABEL"
	else
		printf "${BLUE}Prepare filesystem ${GREEN}'%s'${NO_COLOR}\n" "$LABEL"
	fi

	if [ -h /dev/disk/by-partlabel/$LABEL ]; then
		# create filesystem
		cmd="mkfs -t vfat \
			-n $PREFIX-$LABEL \
			/dev/disk/by-partlabel/$LABEL"
		cmd=`echo $cmd | tr -s "[:blank:]"`
		if [ $dryrun -eq 1 ]; then
			printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
		else
			eval "$cmd"
		fi
	fi
}

die () {
    error "$@"
    exit 1
}

error () {
    printf "\n==> ERROR: %s\n" "$@"
} >&2

get_config_name () {
    local config_json=${configfile:-$config_json}
    local disk_name=${1}

    if [ $verbose -ge 1 ]; then
	printf "${BLUE}get_config_name ...${NO_COLOR}\n"
    fi

    if test ! -r ${config_json}; then
	if [ $verbose -ge 1 ]; then
	    printf "${RED}Error:${MAGENTA} config file ${GREEN}'%s'${MAGENTA} can't be opend!${NO_COLOR}\n" \
		   "config_json"
	fi
	exit 1
    fi

    cmd="jq --monochrome-output --ascii-output ' .ConfigEnvironment[] \
	    | .ConfigName as \$MediaPoolName \
	    | .Disk[].DiskName \
	    | select(. == \"${disk_name}\") \
	    | \$ConfigName'
	    ${config_json}"

    cmd="jq --monochrome-output --ascii-output ' .ConfigEnvironment[] \
	    | .ConfigName ' \
	    ${config_json}"
    config_names=$(eval $cmd)
    config_names=$(echo $config_names | sed -e 's/\n//g')

    if [ $verbose -ge 2 ]; then
	printf "${MAGENTA}Config environment names: ${GREEN}'%s'${NO_COLOR}\n" \
	       "$config_names"
    fi
}

get_config_names () {
    local config_json=${configfile:-$config_json}

    if [ $verbose -ge 1 ]; then
	printf "${BLUE}get_config_names ...${NO_COLOR}\n"
    fi

    if [ ! -r ${config_json} ]; then
	if [ $verbose -ge 1 ]; then
	    printf "${RED}Error:${MAGENTA} config file ${GREEN}'%s'${MAGENTA} can't be opend!${NO_COLOR}\n" \
		   "config_json"
	fi
	exit 1
    fi

    cmd="jq --monochrome-output --ascii-output ' .ConfigEnvironment[] \
	    | .ConfigName ' \
	    ${config_json}"
    config_names=$(eval $cmd)
    config_names=$(echo $config_names | sed -e 's/\n//g')
}

get_config_disk_names () {
    local config_json=${config_file:-$config_json}

    if [ $verbose -ge 1 ]; then
	printf "${BLUE}get_config_disk_names ...${NO_COLOR}\n"
    fi

    if test ! -r ${config_json}; then
	if [ $verbose -ge 1 ]; then
	    printf "${RED}Error:${MAGENTA} config file ${GREEN}'%s'${MAGENTA} can't be opend!${NO_COLOR}\n" \
		   "config_json"
	fi
	return 1
    fi

    cmd="jq --monochrome-output --ascii-output '.ConfigEnvironment[] \
	    | select(.ConfigName == \"${config_name}\") \
	    | .Disk[].DiskName' \
	    ${config_json}"
    disk_names=$(eval $cmd)
    disk_names=$(echo $disk_names | sed -e 's/["\n]//g')

    if [ $verbose -ge 2 ]; then
	printf "${MAGENTA}Disks in config environment ${GREEN}'%s'${MAGENTA} are: ${NO_COLOR}%s${NO_COLOR}\n" \
	       "$config_name" "$disk_names"
    fi

    if [ $verbose -ge 2 ]; then
	i=1
	for disk in $disk_names; do
	    printf "${MAGENTA}Disk ${GREEN}'%d'${MAGENTA} with name ${GREEN}'%s'${NO_COLOR}\n" \
		   "$i" "$disk"
	    i=$(expr $i + 1)
	done
    fi
}

mount_target_filesytems () {
	local LABEL=$1
	local MOUNT_POINT=$2

	printf "${BLUE}Install target system ${GREEN}'%s' -> '%s'${NO_COLOR}\n" "$LABEL" "$MOUNT_POINT"

	mount_target $MOUNT_POINT /dev/disk/by-partlabel/$LABEL btrfs root

	for subdir in boot data home swap var/log var/cache var/lib/machines; do
		mkdir -p $MOUNT_POINT/$subdir
	done

	mount_target $MOUNT_POINT/var/cache /dev/disk/by-partlabel/$LABEL btrfs var/cache
	mount_target $MOUNT_POINT/var/log /dev/disk/by-partlabel/$LABEL btrfs var/log
	mount_target $MOUNT_POINT/boot /dev/disk/by-partlabel/$label_uefi fat
	mount_target $MOUNT_POINT/var/lib/machines /dev/disk/by-partlabel/$label_machines btrfs /
	mount_target $MOUNT_POINT/data /dev/disk/by-partlabel/$label_data btrfs /

	# change new root to target
	cmd="arch-chroot $MOUNT_POINT install_target"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi
}

install_target () {
	local LABEL=$1

	printf "${BLUE}Install target system ${GREEN}'%s' -> '%s'${NO_COLOR}\n" "$LABEL" "$MOUNT_POINT"

	# Update available packages
	cmd="pacman -Sy"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi

	# Basic packages
	cmd="pacstrap $MOUNT_POINT arch-install-scripts base btrfs-progs intel-ucode linux linux-firmware dosfstools iptables-nft man sudo"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi

	# Hyper-V packages
	cmd="pacstrap $MOUNT_POINT hyperv"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi

	# SSH-Daemon, FileManager and Editor
	cmd="pacstrap $MOUNT_POINT dropbear vim mc bash-completion n"
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi

	prepare_network_stack
	create_network_stack

	prepare_bootloader
	create_bootloader

	prepare_locale $label_prefix

	#systemctl enable hvkvpdaemon.service
	#systemctl enable hvvssdaemon.service

	genfstab / >/etc/fstab
}

mount_target () {
	local MOUNT_POINT=$1
	local DEV_NAME=$2
	local FS_TYPE=$3
	local FS_SUBVOL=$4

	case $FS_TYPE in
		"btrfs")
			if [ -h $DEV_NAME ]; then
				cmd="mount -t $FS_TYPE  \
					-o subvol=$FS_SUBVOL \
					$DEV_NAME \
					$MOUNT_POINT"
				printf "${BLUE}mounting subvol ${GREEN}'%s' ${BLUE}of ${GREEN}'%s' ${BLUE}at ${GREEN}'%s${NO_COLOR}\n" \
					"$FS_SUBVOL" "$DEV_NAME" "$MOUNT_POINT"
			fi
			;;
		"vfat")
			if [ -h $DEV_NAME ]; then
				cmd="mount -t $FS_TYPE \
					$DEV_NAME \
					$MOUNT_POINT"
				printf "${BLUE}mounting ${GREEN}'%s' ${BLUE}at ${GREEN}'%s${NO_COLOR}\n" \
					"$DEV_NAME" "$MOUNT_POINT"
			fi
			;;
	esac

	cmd=`echo $cmd | tr -s "[:blank:]"`
	if [ $dryrun -eq 1 ]; then
		printf "${MAGENTA}Would run ${GREEN}'%s'${NO_COLOR}\n" "$cmd"
	else
		eval "$cmd"
	fi
}

parse_params () {
    #printf "\n${BLUE}Parse arguments...${NO_COLOR}\n"

    # Evaluate given call parameters
    i=0
    while [ $# -gt 0 ]; do
	key="$1"
	case $key in
	    -h | --help | \-\? | --usage)
		#  Call usage() function.
		usage
		;;
	    --color)
		color=1
		shift 1
		;;
	    -c | --config)
		config_json="$2"
		shift 2
		;;
	    --get-config-name)
		shift 1
		config_params=${*}
		config_params="${config_params%% -?[a-z-]*}"
		params=$*
		set -- $config_params
		cmd=get-config-name
		;;
	    --get-config-names)
		shift 1
		config_params=${*}
		config_params="${config_params%% -?[a-z])*}"
		set -- $config_params
		cmd=get-config-names
		;;
	    --get-config-disk-names)
		shift 1
		config_params=${*}
		config_params="${config_params%% -?[a-z]*}"
		params=$*
		set -- "$config_params"
		count=$#
		test $count -lt 1 && printf "missing argument: config_name\n" && exit 1
		test $count -ge 1 && config_name="$1"
		#test $count -ge 2 && disk_name="$2"
		set -- $params
		shift $count
		cmd=get-config-disk-names
		;;
	    --dry-run|--dryrun)
		dryrun=1
		shift 1
		;;
	    --mountpoint|--MOUNTPOINT)
		mount_point="$2"
		shift 2
		;;
	    --labelprefix)
		label_prefix="$2"
		shift 2
		;;
	    --label_data)
		label_data="$2"
		shift 2
		;;
	    --target_data)
		target_data="$2"
		shift 2
		;;
	    --target_machines)
		target_machines="$2"
		shift 2
		;;
	    --target_os)
		target_os="$2"
		shift 2
		;;
	    --target_machines|--target_machines)
		target_machines="$2"
		shift 2
		;;
	    --target_os|--target_os)
		target_os="$2"
		shift 2
		;;
	    -v|--verbose)
		verbose=$(expr $verbose '+' 1)
		shift 1
		;;
	    --version)
		printf "%s v%s\n" "$progname" "$version"
		exit 0
		;;
	    --color=*)
		case ${1#*=} in
		    yes | Yes | True | true)
			color=1;
			;;
		    *)
			;;
		esac
		shift
		;;
	    --c=* | --config=*)
		config_json=${1#*=}
		shift
		;;
	    --mountpoint=*)
		mount_point=${1#*=}
		shift
		;;
	    --labelprefix=*)
		label_prefix=${1#*=}
		shift
		;;
	    --label_data=*|--LABEL_DATA=*)
		label_data=${1#*=}
		shift
		;;
	    --label_machines=*|--LABEL_MACHINES=*)
		label_machines=${1#*=}
		shift
		;;
	    --label_os=*|--LABEL_OS=*)
		label_os=${1#*=}
		shift
		;;
	    --target_data=*|--TARGET_DATA=*)
		target_data=${1#*=}
		shift
		;;
	    --target_machines=*|--TARGET_MACHINES=*)
		target_machines=${1#*=}
		shift
		;;
	    --target_os=*|--TARGET_OS=*)
		target_os=${1#*=}
		shift
		;;
	    --v=* | --verbose=*)
		verbose=${1#*=}
		shift
		;;
	    --) # End of all options
		shift
		break
		;;
	    -*)
		printf "WARN: Unknown option (ignored): $1" >&2
		die "Unknown option"
		;;
	    *)
		printf "Unknown option: %s\nRun '%s -h' for valid options.\n" $key $progname
		die "Unknown option"
		;;
	esac
    done

    # check if config is accessible in given path
    for config in ${config_json} ./${config_json} ${HOME}/${config_json} /etc/${progname}/${config_json}; do
	if [ -r $config ] ; then
	    config_json=$config
	    break
	else
	    config_json="NONE"
	fi
    done
    if [ ${config_json} = "NONE" ]; then
	if [ $verbose -ge 1 ]; then
	    printf "${BLUE}No config file accessible!${NO_COLOR}\n" \
	#    printf "${RED}Error:${MAGENTA} config file ${GREEN}'%s'${MAGENTA} can't be opend!${NO_COLOR}\n" \
	#	   "$config_json"
	fi
	#exit 1
    fi

    target_os=${target_os:-"/dev/sda"}
    mount_point=${mount_point:-"/mnt"}
    label_prefix=${label_prefix:-"BTRFS"}
    label_os=${label_os:-"OS"}
    label_machines=${label_machines:-"MACHINES"}
    label_data=${label_data:-"DATA"}
    label_uefi=${label_uefi:-"UEFI"}

    if [ $verbose -eq 0 ]; then quiet=1; fi

    if [ "$color" ]; then
	# ascii color
	BLUE='\033[0;34m'
	GREEN='\033[0;32m'
	MAGENTA='\033[0;35m'
	RED='\033[0;31m'
	YELLOW='\033[0;33m'
	NO_COLOR='\033[0m'
    fi

    if [ $verbose -ge 1 ]; then
	printf "${BLUE}$progname (runtime arguments)...${NO_COLOR}\n"
	i=0
	printf "using parameters:\n"
	printf "  Config File:     '%s'\n" "$config_json"
	printf "  TARGET OS:       '%s'\n" "$target_os"
	printf "  Mount Point:     '%s'\n" "$mount_point"
	printf "  TARGET Machines: '%s'\n" "$target_machines"
	printf "  TARGET DATA:     '%s'\n" "$target_data"
	printf "  Label Prefix:    '%s'\n" "$label_prefix"
	printf "  Label OS:        '%s'\n" "$label_os"
	printf "  Label Machines:  '%s'\n" "$label_machines"
	printf "  Label DATA:      '%s'\n" "$label_data"
	printf "  Label UEFI:      '%s'\n" "$label_uefi"

	if [ $verbose -ge 2 ]; then options="verbose_level=$verbose"; fi
	if [ $dryrun -ge 1 ]; then options="${options}dryrun=true"; fi
	if [ $color -ge 1 ]; then options="${options} color=true"; fi

	printf "Options:           '%s'\n\n" "${options}"
    fi
}

prepare_bootloader () {

	# check for accessible uefi partition
	ls /sys/firmware/efi/efivars > /dev/null
	if [ $? -eq 0 ]; then
		printf "UEFI Environmint is ok'\n"

		mkdir -p /boot/loader/entries

		printf '%s\n' \
		"default      arch" \
		"timeout      3" \
		"editor       yes" \
		"console-mode max" \
		> /boot/loader/loader.conf

		printf '%s\n' \
		"default  arch" \
		"title    Arch Linux (Mainline)" \
		"linux    /vmlinuz-linux" \
		"initrd   /intel-ucode.img" \
		"initrd   /initramfs-linux.img" \
		"options  rootflags=subvol=root root=LABEL=BTRFS-OS" \
		> /boot/loader/entries/arch.conf

		bootctl status
	fi
}

prepare_locale () {
	local LABEL=$1

	hostnamectl set-hostname $LABEL-lin01
	localectl set-keymap de-latin1-nodeadkeys
}

prepare_network_stack () {
	printf '%s\n' \
	"[Match]" \
	"Name=eth0" \
	"" \
	"[Network]" \
	"Description=Slave Bridge-Interface" \
	"Bridge=bridge-lan" \
	> /etc/systemd/network/70-eth0-bridge-slave.netdev

	printf '%s\n' \
	"[Match]" \
	"#Host=Lin01" \
	"#Architecture=x86_64" \
	"" \
	"[NetDev]" \
	"Description=Bridge for Containers" \
	"Name=bridge-lan" \
	"Kind=bridge" \
	> /etc/systemd/network/80-bridge-lan.netdev

	printf '%s\n' \
	"[Match]" \
	"Name=bridge-lan" \
	"Driver=bridge" \
	"" \
	"[Network]" \
	"Description=Bridge for Containers" \
	"IPForward=yes" \
	"IPMasquerqade=yes" \
	"LinkLocalAddressisng=yes" \
	"IPv6AcceptRA=yes" \
	"IgnoreCarrierLoss=yes" \
	> /etc/systemd/network/80-bridge-lan.network
}

prepare_target_disks () {
	create_disk ${target_os} $label_os $label_prefix 2
	create_disk ${target_machines} $label_machines $label_prefix
	create_disk ${target_data} $label_data $label_prefix
}

prepare_target_filesystems () {
	create_fat $label_uefi $label_prefix $mount_point
	create_btrfs $label_os $label_prefix $mount_point
	create_btrfs $label_machines $label_prefix $mount_point
	create_btrfs $label_data $label_prefix $mount_point

	create_fs_structure $label_os $label_prefix $mount_point /
}

usage () {
	cat <<EOF
$progname $version
Usage: $progname [options]
Options:
 -c, --config                   Read config parameters from given file
     --color                    Enable colored output messages
     --dry-run                  perform a trial run (no changes are written)
     --mountpoint               Specify MountPoint where targets OS-Disk will be mounted
     --label_prefix <prefix>    Specify the partion label prefix
 -t, --target_os <target>       Specify the blockdevice for the target OS (e.g /dev/sda)
     --target_machines <target> Specify the blockdevice for containers/machines (e.g /dev/sdb)
     --target_data <target>     Specify the blockdevice to store data (e.g /dev/sdc)
 -v, --verbose                  Be verbose on what's going on (min: --verbose=1, max: --verbose=3)
     --version			show program version
EOF

    exit 0
}

###
# Main
###
# can't be ported to dash (ERR is not supported)
#trap 'traperror ${LINENO} $? "$BASH_COMMAND" $BASH_LINENO "${FUNCNAME[@]}"' ERR
trap trapkill TERM INT

check_prerequisites

# validate commandline options, set resonable defaults
parse_params $@
#get_config

case $cmd in
    get-config-name)
	get_config_name
	if test $? -gt 0; then
	    exit 1
	else
	    if [ $quiet -eq 0 ]; then
		printf "${MAGENTA}Config Environment: ${GREEN}'%s'${NO_COLOR}\n" \
		       "${config_name}"
	    fi
	fi
	;;
    get-config-names)
	get_config_names
	if [ $? -gt 0 ]; then
	    exit 1
	else
	    if [ $quiet -eq 0 ]; then
		printf "${MAGENTA}Config environment names: ${GREEN}'%s'${NO_COLOR}\n" \
		       "${config_names}"
	    fi
	fi
	;;
    get-config-disk-names)
	valid_member=0
	get_config_disk_names "${config_name}" "${disk_name}"
	if [ $? -gt 0 ]; then
	    exit 1
	else
	    if [ $quiet = 0 ]; then
		printf "Config environment ${GREEN}'%s'${NO_COLOR} with disks: ${GREEN}'%s'${NO_COLOR}\n" \
		       "${config_name}" "${disk_names}"
	    fi
	    valid_member=${#disk_names}
	fi
	;;
    get-config-partition_names)
	;;
esac

exit 0


# prepare target
prepare_target_disks
prepare_target_filesystems

mount_target_filesystems
#install_target OS $mount_point