#! @bash@/bin/sh -e

export PATH=@bash@/bin:@coreutilsdiet@/bin:@coreutils@/bin:@findutils@/bin:@utillinux@/bin:@utillinux@/sbin:@e2fsprogs@/sbin:@grub@/sbin:@sysvinitPath@/sbin:@gnugrep@/bin:@which@/bin:@gnutar@/bin:@eject@/bin

##
## In the beginning we want to have a minimalistic environment, built with
## klibc.
##

kernel=@kernel@

storePaths=/mystorepaths

sysvinitPath=@sysvinitPath@
bootPath=@bootPath@
modutils=@modutils@
hotplug=@hotplug@
mingetty=@mingetty@

echo mounting special filesystems

mount -t proc proc /proc
mount -t sysfs sys /sys

# make a complete /dev filesystem
# ripped permissions and everything from anaconda (loader2/devices.h)

echo making device nodes

# consoles

#mknod -m 0600 /dev/console c 5 1
mknod -m 0600 /dev/ttyS0 c 4 64
mknod -m 0600 /dev/ttyS1 c 4 65
mknod -m 0600 /dev/ttyS2 c 4 66
mknod -m 0600 /dev/ttyS3 c 4 67

# base UNIX devices
mknod -m 0600 /dev/mem c 1 1
mknod -m 0666 /dev/null c 1 3
mknod -m 0666 /dev/zero c 1 5

# tty
mknod -m 0600 /dev/tty c 5 0
mknod -m 0600 /dev/tty0 c 4 0
mknod -m 0600 /dev/tty1 c 4 1
mknod -m 0600 /dev/tty2 c 4 2
mknod -m 0600 /dev/tty3 c 4 3
mknod -m 0600 /dev/tty4 c 4 4
mknod -m 0600 /dev/tty5 c 4 5
mknod -m 0600 /dev/tty6 c 4 6
mknod -m 0600 /dev/tty7 c 4 7
mknod -m 0600 /dev/tty8 c 4 8
mknod -m 0600 /dev/tty9 c 4 9

mkdir -m 0755 /dev/pts
mknod -m 0666 /dev/ptmx c 5 2

# random

mknod -m 0644 /dev/random c 1 8
mknod -m 0644 /dev/urandom c 1 9

mknod -m 0660 /dev/hda b 3 0
mknod -m 0660 /dev/hda1 b 3 1
mknod -m 0660 /dev/hda2 b 3 2
mknod -m 0660 /dev/hda3 b 3 3

mknod -m 0660 /dev/hdb b 3 64
mknod -m 0660 /dev/hdb1 b 3 65
mknod -m 0660 /dev/hdb2 b 3 66
mknod -m 0660 /dev/hdb3 b 3 67

mknod -m 0660 /dev/hdc b 22 0
mknod -m 0660 /dev/hdc1 b 22 1
mknod -m 0660 /dev/hdc2 b 22 2
mknod -m 0660 /dev/hdc3 b 22 3

mknod -m 0660 /dev/hdd b 22 64
mknod -m 0660 /dev/hdd1 b 22 65
mknod -m 0660 /dev/hdd2 b 22 66
mknod -m 0660 /dev/hdd3 b 22 67

#mknod -m 0660 /dev/sda b 8 0
#mknod -m 0660 /dev/sda1 b 8 1
#mknod -m 0660 /dev/sda2 b 8 2
#mknod -m 0660 /dev/sda3 b 8 3

mknod -m 0600 /dev/initctl p

echo starting emergency shell on tty2

exec ./ramdisk-login.sh /dev/tty2 &

targetdrive=/dev/hda
device=${targetdrive}1
mkfs.ext2 ${device}
mkswap ${targetdrive}2


#if ! test -n "$1"
#then
#    echo "need harddisk device for installing!"
#    exit
#else
#    device=$1
#fi


make_dir() {
    mode=$1
    name=$2
    echo creating $name...
    if ! test -d $root/$name; then mkdir $root/$name; fi
    chmod $mode $root/$name
}


touch_file() {
    name=$1
    echo touching $name...
    if ! test -d $root/$name; then touch $root/$name; fi
}
root=/tmp/mnt

mkdir -p $root

echo mounting the target drive

mount -t ext2 $device $root

##
## Create a directory tree on the installation disk.
##

echo creating file system hierarchy on target drive

make_dir 00755 /bin
make_dir 00755 /boot
make_dir 00755 /dev
make_dir 00755 /dev/pts
make_dir 00755 /etc # global non-constant configuration
make_dir 00755 /etc-secret
make_dir 00755 /home
make_dir 00755 /lib
make_dir 00755 /lib/modules
make_dir 00755 /mnt
make_dir 00755 /mnt/host
make_dir 00755 /nix
make_dir 00755 /nix/store
make_dir 00755 /nix/var
make_dir 00755 /nix/var/nix
make_dir 00755 /nix/var/nix/db
make_dir 00755 /nix/var/nix/gcroots
make_dir 00755 /nix/var/nix/manifests
make_dir 00755 /nix/var/nix/profiles
make_dir 00755 /nix/var/nix/temproots
make_dir 00755 /nix/var/log
make_dir 00755 /nix/var/log/nix
make_dir 00755 /nixpkgs
make_dir 00755 /nixpkgs/trunk
make_dir 00755 /proc
make_dir 00750 /root
make_dir 00755 /sbin
make_dir 00755 /sys
make_dir 01777 /tmp
make_dir 00755 /usr
make_dir 00755 /var
make_dir 00755 /var/log
make_dir 00755 /var/run
make_dir 00755 /var/spool
make_dir 00755 /var/state
make_dir 00755 /var/state/dhcp
make_dir 00755 /var/tmp

##
## Add a few devices to /dev on the install disk. This is by far complete.
##

echo making device nodes on target drive

mknod $root/dev/null c 1 3
mknod -m 0600 $root/dev/console c 5 1
mknod -m 0600 $root/dev/tty c 5 0
mknod -m 0600 $root/dev/tty0 c 4 0
mknod -m 0600 $root/dev/tty1 c 4 1
mknod -m 0444 $root/dev/urandom c 1 9

rm -f $root/etc/mtab
ln -s /proc/mounts $root/etc/mtab

## Probe for CD device which contains our CD here and mount /nix and
## /nixpkgs from it inside the ramdisk. Anaconda uses kudzu for this.
## Find out how Knoppix and SUSE do this...

DEVICES="/dev/hd?"

for i in ${DEVICES}
do
echo "Looking for CDROM in: $i"
  if mount -t iso9660 $i /cdrom >/dev/null 2>&1
  then
    if test -f /cdrom/NIXOS
    then
      cddevice=$i
      echo "Accessing NixOS CDROM at $i"
    break
    fi
  fi
done

echo switch to /nix and /nixpkgs from CD

## starting here it's OK to have full blown glibc

ln -s /cdrom/nixpkgs /nixpkgs
mount --bind /cdrom/nix /nix


export NIX_DATA_DIR=$root/nix/share
export NIX_LOG_DIR=$root/nix/log/nix
export NIX_STATE_DIR=$root/nix/var/nix
export NIX_CONF_DIR=$root/nix/etc
NIX_CMD_PATH=@NIX_CMD_PATH@/bin

echo initialising Nix DB...
$NIX_CMD_PATH/nix-store --init

echo verifying Nix DB...
$NIX_CMD_PATH/nix-store --verify

echo copying nixpkgs...
#cp -fLa /cdrom/pkgs $root/nixpkgs/trunk
tar --directory=/cdrom -cf - pkgs | tar --directory=$root/nixpkgs/trunk -xvf -

make_dir 0755 /tmp/scripts
cp -fa /cdrom/scripts $root/tmp

#echo adding manifest
#$NIX_CMD_PATH/nix-pull $manifest

echo adding packages

export NIX_ROOT=$root
unset NIX_DATA_DIR
unset NIX_LOG_DIR
unset NIX_STATE_DIR
unset NIX_CONF_DIR

storeExpr=$(echo '(import /tmp/scripts/pkgs.nix).kernel' | $NIX_CMD_PATH/nix-instantiate -v -v -)
#storeExpr=$(echo '(import /tmp/scripts/pkgs.nix).everything' | $NIX_CMD_PATH/nix-instantiate -v -v -)
#storeExpr=$(echo '(import ./pkgs.nix).everything' | $NIX_CMD_PATH/nix-instantiate -v -v -)
#$NIX_CMD_PATH/nix-store -r $storeExpr
echo $storeExpr > $root/tmp/storeExpr
cp /cdrom/mystorepaths $root/tmp
#storeExpr2=$($NIX_CMD_PATH/nix-store -qR $($NIX_CMD_PATH/nix-store -r $storeExpr))
#echo storeExpr $storeExpr
#echo $($NIX_CMD_PATH/nix-store -qR --include-outputs $storeExpr)

echo copying store

#cp -fva /nix/store/* $root/nix/store
tar cf - /nix/store | tar --directory=$root -xvf -

echo registering valid paths...

$NIX_CMD_PATH/nix-store --register-validity < $root/tmp/mystorepaths

echo setting init symlink...
rm -f $root/init
#ln -s $sysvinitPath/sbin/init $root/init
ln -s @sysvinitPath@/sbin/init $root/sbin/init
ln -s @bash@/bin/sh $root/bin/sh
ln -s @bash@/bin/bash $root/bin/bash

echo setting up inittab...
rm -f $root/etc/inittab
echo "id:2:initdefault:" >> $root/etc/inittab
echo "si::bootwait:$bootPath/bin/boot.sh" >> $root/etc/inittab
echo "ht:06:wait:$bootPath/bin/halt.sh" >> $root/etc/inittab
echo "1:2345:respawn:$bootPath/bin/login.sh /dev/tty1" >> $root/etc/inittab
echo #"2:2345:respawn:$mingetty/sbin/mingetty tty2" >> $root/etc/inittab
#echo "2:2345:respawn:$bootPath/bin/login.sh /dev/ttys/1" >> $root/etc/inittab

echo setting up networking information...
make_dir 00755 /etc/networking
echo 192.168.150.1 > $root/etc/networking/local-ip
echo 192.168.150.3 > $root/etc/networking/gateway-ip
#cp /etc/resolv.conf $root/etc
rm -f $root/etc/hosts
echo "127.0.0.1 localhost" >> $root/etc/hosts
#echo "192.168.150.1 uml" >> $root/etc/hosts

echo setting up initial account information...

echo "root:x:0:root" > $root/etc/group
echo "root:x:0:0:root:/root:/bin/sh" > $root/etc/passwd
echo "root::12757:0:99999:7:::" > $root/etc/shadow

###
### Do kernel stuff here.
###
strippedName=$(basename @kernel@);
if echo "$strippedName" | grep -q '^[a-z0-9]\{32\}-'; then
        strippedName=$(echo "$strippedName" | cut -c34- | cut -c 7-)
fi

kernelhash=$(basename @kernel@);
if echo "$kernelhash" | grep -q '^[a-z0-9]\{32\}-'; then
        kernelhash=$(echo "$kernelhash" | cut -c -32)
fi

version=$strippedName-$kernelhash

make_dir 0755 /lib/modules/$version

ln -s @kernel@/lib/modules/$version/build $root/lib/modules/$version/build
ln -s @kernel@/lib/modules/$version/kernel $root/lib/modules/$version/kernel
cp @kernel@/lib/modules/$version/modules.* $root/lib/modules/$version
chmod 644 $root/lib/modules/$version/modules.*

###
### Do funky stuff with grub here.
###

ln -s @hotplug@/sbin/hotplug $root/sbin/hotplug
ln -s @hotplug@/etc/hotplug $root/etc/hotplug
ln -s @hotplug@/etc/hotplug.d $root/etc/hotplug.d
ln -s $device $root/dev/root
ln -s @sysvinitPath@/sbin/init /sbin/init

echo installing bootloader

grub-install --root-directory=${root} --no-floppy ${targetdrive}

# FIXME "root (hd0,0)"
cat > $root/boot/grub/menu.lst << GRUBEND
default=0
timeout=5
title NixOS
        root (hd0,0)
        kernel @kernel@/vmlinuz root=$device
GRUBEND

echo copying install log

cp /tmp/install-log $root/root

echo umounting filesystem

umount $root
#umount /nix
umount /cdrom
#echo ejecting $cddevice
#eject $cddevice

echo install done
echo it\'s safe to turn off your machine

while true; do
   sleep 60;
done