#!/bin/false
# Script library to be used by disk-install.sh and make-disk-image.sh

status(){
    echo "$@"
}

info(){
    echo "$@" >&2
}

warn(){
    echo "$@" >&2
}

extract_rootfs(){
    tar -C "$1" -xf @@ROOTFS_TAR_PATH@@ .
}

make_disk_image(){
    truncate --size "$1" "$2"
}

format_disk(){
    local disk="$1"
    mkfs.ext4 -F -L rootfs "$disk"
}

install_fs_config(){
    local mountpoint="$1"
    local rootdisk="${2-/dev/vda}"
    cat >>"$mountpoint/etc/fstab" <<EOF
$rootdisk / ext4 rw,errors=remount-ro 0 0
EOF
    install -D -m 644 /proc/self/fd/0 "$mountpoint/boot/extlinux.conf" <<EOF
DEFAULT baserock
LABEL   baserock
SAY     Booting Baserock
LINUX   /boot/vmlinuz
APPEND  root=$rootdisk
EOF
}

install_bootloader(){
    local disk="$1"
    local mountpoint="$2"
    dd if=@@IMAGE_DIR@@/mbr.bin conv=notrunc bs=440 count=1 of="$disk"
    extlinux --install "$mountpoint/boot"
}

loop_file(){
    losetup --show --find "$1"
}
unloop_file(){
    #losetup --detach "$1"
    # unlooping handled by umount -d, for busybox compatibility
    true
}

temp_mount(){
    local mp="$(mktemp -d)"
    if ! mount "$@" "$mp"; then
        rmdir "$mp"
        return 1
    fi
    echo "$mp"
}
untemp_mount(){
    # Unmount and detach in one step for busybox compatibility
    umount -d "$1"
    rmdir "$1"
}