#!/bin/sh

SUDO=
mntpt=/tmp/3sys1mnt

make -C kern || exit 1

echo 'creating partition image: part.img'
dd if=/dev/zero of=part.img bs=1024 count=63488
mkfs -t vfat -n SYS1ROOT part.img

echo 'creating disk image: disk.img'
dd if=/dev/zero of=disk.img bs=1024 count=65536
echo start=2048 type=c | sfdisk disk.img

echo 'combining images'
dd if=part.img of=disk.img bs=1024 seek=1024 conv=notrunc

if [ "`id -u`" != 0 ]; then
	if sudo --version >/dev/null 2>&1; then
		echo 'will need superuser priviledges for the next part, using sudo'
		SUDO=sudo
	else
		echo 'will need superuser priviledges for the next part, using su'
		su || exit 1
	fi
fi

echo "mounting parition image to $mntpt"
$SUDO mkdir -p $mntpt
$SUDO mount -o loop,offset=1M disk.img $mntpt
$SUDO mkdir -p $mntpt/boot/grub
echo 'copying grub files'
$SUDO cp grub.cfg $mntpt/boot/grub
echo 'copying kernel'
$SUDO cp kern/kern1.elf $mntpt/boot
echo 'installing grub'
$SUDO grub-install --target=i386-pc --boot-directory=$mntpt/boot \
	--skip-fs-probe --install-modules='part_msdos fat multiboot' \
	--modules='part_msdos fat multiboot' disk.img
$SUDO umount $mntpt