#!/bin/sh

echo "this is meant to be run from the iso!!!"
if [ $(whoami) = nixos ] ; then
  echo "iso detected. continue!"
else
  echo "you don't appear to be in the install iso."
  echo -n "are you SURE??? (y/N) "
  read sure
  if ! [ "$sure" = "y" ] ; then
    echo "ok. exiting."
    exit 0
  fi
  echo "i will continue."
fi

lsblk
echo -n "> what drive to install on? /dev/"
read drive
sudo fdisk "/dev/$drive" << EOF
o
n
p
1


a
w
EOF
if [ $? != 0 ] ; then exit 1 ; fi
echo "> created DOS partition table on $drive with one bootable partition."
sudo mkfs.ext4 $drive*1 || exit 1 # /dev/sda 1 or /dev/nvme0n1 p1 => *1 instead of just 1
echo "> formatted."
sudo mount $drive*1 /mnt || exit 1
echo "> mounted."
echo "> generating config"
sudo nixos-generate-config --root /mnt
cd /mnt/etc/nixos
echo -n "hostname: "
sudo sed -i -E "s/^}\$/  boot.loader.grub.device = \"\/dev\/$drive\";\n  networking.hostName = \"$(head -n1)\";\n}/" hardware-configuration.nix
echo "> installing git"
nix-env -i git > /dev/null || exit 1
echo "> downloading tudbut/nix-setup"
sudo git clone https://git.tudbut.de/tudbut/nix-setup
sudo rm configuration.nix
pushd nix-setup ; sudo mv $(ls -a) .. ; popd
echo "> initializing"
sudo bash init.sh