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#!/bin/sh -e
#
# Copyright (C) 2008-2011 Intel
#
# install.sh [device_name] [rootfs_name] [video_mode] [vga_mode]
#

PATH=/sbin:/bin:/usr/sbin:/usr/bin

# We need 20 Mb for the boot partition
boot_size=20

# 5% for the swap
swap_ratio=5

# Get a list of hard drives
hdnamelist=""
live_dev_name=${1%%/*}

echo "Searching for hard drives ..."

for device in `ls /sys/block/`; do
    case $device in
	loop*)
            # skip loop device
	    ;;
	ram*)
            # skip ram device
	    ;;
	*)
	    # skip the device LiveOS is on
	    # Add valid hard drive name to the list
	    if [ $device != $live_dev_name -a -e /dev/$device ]; then
		hdnamelist="$hdnamelist $device"
	    fi
	    ;;
    esac
done

TARGET_DEVICE_NAME=""
for hdname in $hdnamelist; do
    # Display found hard drives and their basic info
    echo "-------------------------------"
    echo /dev/$hdname
    if [ -r /sys/block/$hdname/device/vendor ]; then
	echo -n "VENDOR="
	cat /sys/block/$hdname/device/vendor
    fi
    echo -n "MODEL="
    cat /sys/block/$hdname/device/model
    cat /sys/block/$hdname/device/uevent
    echo
    # Get user choice
    while true; do
	echo -n "Do you want to install this image there? [y/n] "
	read answer
	if [ "$answer" = "y" -o "$answer" = "n" ]; then
	    break
	fi
	echo "Please answer y or n"
    done
    if [ "$answer" = "y" ]; then
	TARGET_DEVICE_NAME=$hdname
	break
    fi
done

if [ -n "$TARGET_DEVICE_NAME" ]; then
    echo "Installing image on /dev/$TARGET_DEVICE_NAME ..."
else
    echo "No hard drive selected. Installation aborted."
    exit 1
fi

device=$TARGET_DEVICE_NAME

#
# The udev automounter can cause pain here, kill it
#
rm -f /etc/udev/rules.d/automount.rules
rm -f /etc/udev/scripts/mount*

#
# Unmount anything the automounter had mounted
#
umount /dev/${device}* 2> /dev/null || /bin/true

if [ ! -b /dev/loop0 ] ; then
    mknod /dev/loop0 b 7 0
fi

mkdir -p /tmp
if [ ! -L /etc/mtab ]; then
	cat /proc/mounts > /etc/mtab
fi

disk_size=$(parted /dev/${device} unit mb print | grep Disk | cut -d" " -f 3 | sed -e "s/MB//")

swap_size=$((disk_size*swap_ratio/100))
rootfs_size=$((disk_size-boot_size-swap_size))

rootfs_start=$((boot_size))
rootfs_end=$((rootfs_start+rootfs_size))
swap_start=$((rootfs_end))

# MMC devices are special in a couple of ways
# 1) they use a partition prefix character 'p'
# 2) they are detected asynchronously (need rootwait)
rootwait=""
part_prefix=""
if [ ! "${device#mmcblk}" = "${device}" ]; then
	part_prefix="p"
	rootwait="rootwait"
fi
bootfs=/dev/${device}${part_prefix}1
rootfs=/dev/${device}${part_prefix}2
swap=/dev/${device}${part_prefix}3

echo "*****************"
echo "Boot partition size:   $boot_size MB ($bootfs)"
echo "Rootfs partition size: $rootfs_size MB ($rootfs)"
echo "Swap partition size:   $swap_size MB ($swap)"
echo "*****************"
echo "Deleting partition table on /dev/${device} ..."
dd if=/dev/zero of=/dev/${device} bs=512 count=2

echo "Creating new partition table on /dev/${device} ..."
parted /dev/${device} mklabel msdos

echo "Creating boot partition on $bootfs"
parted /dev/${device} mkpart primary 0% $boot_size

echo "Creating rootfs partition on $rootfs"
parted /dev/${device} mkpart primary $rootfs_start $rootfs_end

echo "Creating swap partition on $swap"
parted /dev/${device} mkpart primary $swap_start 100%

parted /dev/${device} print

echo "Formatting $bootfs to ext3..."
mkfs.ext3 $bootfs

echo "Formatting $rootfs to ext3..."
mkfs.ext3 $rootfs

echo "Formatting swap partition...($swap)"
mkswap $swap

mkdir /tgt_root
mkdir /src_root
mkdir -p /boot

# mount target filesystems
mount $bootfs /boot
mount $rootfs /tgt_root

# Check whether an initramfs is available and get uuid of filesystems
has_initramfs=""
uuid_rootfs=""
uuid_bootfs=""
uuid_swap=""
if [ -e /run/media/$1/vmlinuz-initramfs -o -e /run/media/$1/initrd.img ]; then
    has_initramfs="yes"
    uuid_rootfs="`blkid $rootfs | cut -d' ' -f2 | sed -e 's/\"//g'`"
    uuid_bootfs="`blkid $bootfs | cut -d' ' -f2 | sed -e 's/\"//g'`"
    uuid_swap="`blkid $swap | cut -d' ' -f2 | sed -e 's/\"//g'`"
fi

# Handling of the target root partition
mount -o rw,loop,noatime,nodiratime /run/media/$1/$2 /src_root
echo "Copying rootfs files..."
cp -a /src_root/* /tgt_root
# Try to use uuid entries in /etc/fstab
if [ "$has_initramfs" = "yes" ]; then
    swap="$uuid_swap"
    bootfs="$uuid_bootfs"
fi
if [ -d /tgt_root/etc/ ] ; then
    echo "$swap                swap             swap       defaults              0  0" >> /tgt_root/etc/fstab
    echo "$bootfs              /boot            ext3       defaults              1  2" >> /tgt_root/etc/fstab
fi
umount /src_root

# Handling of the target boot partition
echo "Preparing boot partition..."

# If there's an initramfs available, try to use UUID in grub.cfg.
# We assume the initramfs has the ability to deal with the UUID parameter.
if [ -e /run/media/$1/vmlinuz-initramfs ]; then
    cp /run/media/$1/vmlinuz-initramfs /boot/vmlinuz
    rootfs="$uuid_rootfs"
else
    cp /run/media/$1/vmlinuz /boot/
fi

if [ -e /run/media/$1/initrd.img ]; then
    cp /run/media/$1/initrd.img /boot/initrd.img
    rootfs="$uuid_rootfs"
    initrd_line="initrd /initrd.img"
fi

if [ -f /etc/grub.d/00_header ] ; then
    echo "Preparing custom grub2 menu..."
    GRUBCFG="/boot/grub/grub.cfg"
    mkdir -p $(dirname $GRUBCFG)
    cat >$GRUBCFG <<_EOF
menuentry "Linux" {
    set root=(hd0,1)
    linux /vmlinuz root=$rootfs $rootwait rw $5 $3 $4 quiet
    $initrd_line
}
_EOF
    chmod 0444 $GRUBCFG
fi
grub-install /dev/${device}
echo "(hd0) /dev/${device}" > /boot/grub/device.map

# If grub.cfg doesn't exist, assume GRUB 0.97 and create a menu.lst
if [ ! -f /boot/grub/grub.cfg ] ; then
    echo "Preparing custom grub menu..."
    echo "default 0" > /boot/grub/menu.lst
    echo "timeout 30" >> /boot/grub/menu.lst
    echo "title Live Boot/Install-Image" >> /boot/grub/menu.lst
    echo "root  (hd0,0)" >> /boot/grub/menu.lst
    echo "kernel /vmlinuz root=$rootfs rw $3 $4 quiet" >> /boot/grub/menu.lst
fi

# umount target filesystems
umount /tgt_root
umount /boot

sync

echo "Remove your installation media, and press ENTER"

read enter

echo "Rebooting..."
reboot -f