#!/bin/sh
# Script for writing the system to an existing disk.
# This formats the disk, extracts the rootfs to it, installs the
# bootloader, and ensures there's appropriate configuration for the
# bootloader, kernel and userland to agree what the rootfs is.

set -eu

usage(){
    cat <<EOF
usage: $0 DISK [TARGET_DISK]

DISK:        Where the disk appears on your development machine
TARGET_DISK: What the disk will appear as on the target machine
EOF
}

. @@SCRIPT_DIR@@/common.sh

if [ "$#" -lt 1 -o "$#" -gt 2 ]; then
    usage
    exit 1
fi

DISK="$1"
TARGET_DISK="${1-/dev/sda}"

status Formatting "$DISK" as ext4
format_disk "$DISK"
(
    info Mounting "$DISK"
    MP="$(temp_mount -t ext4 "$DISK")"
    info Mounted "$DISK" to "$MP"
    set +e
    (
        set -e
        info Copying rootfs onto disk
        extract_rootfs "$MP"
        info Configuring disk paths
        install_fs_config "$MP" "$TARGET_DISK"
        info Installing bootloader
        install_bootloader "$DISK" "$MP"
    )
    ret="$?"
    if [ "$ret" != 0 ]; then
        warn Filling rootfs failed with "$ret"
    fi
    info Unmounting "$DISK" from "$MP" and removing "$MP"
    untemp_mount "$MP"
    exit "$ret"
)