#!/usr/bin/env bash
# Runs INSIDE the NixOS minimal installer (over serial) to lay down the golden
# system onto /dev/vda from the seed media. Driven by build-golden.sh.
set -euo pipefail
# Fast-fail signal for the driver instead of hanging until its timeout.
trap 'echo "=== NINA_INSTALL_FAIL ==="; sync; sleep 2; poweroff -f' ERR

SEED_DIR="$(cd "$(dirname "$0")" && pwd)"
echo "=== NINA_INSTALL_START ==="

# Single BIOS-bootable ext4 root (MBR) — matches grub.device=/dev/vda.
parted -s /dev/vda mklabel msdos
parted -s /dev/vda mkpart primary ext4 1MiB 100%
parted -s /dev/vda set 1 boot on
udevadm settle || true
mkfs.ext4 -F -L nixos /dev/vda1
udevadm settle || true

# Mount the partition device directly — the /dev/disk/by-label symlink may not
# be populated by udev yet immediately after mkfs.
mount /dev/vda1 /mnt

# Generate hardware-configuration.nix for this disk, then drop in our config.
nixos-generate-config --root /mnt
cp "$SEED_DIR/configuration.nix" /mnt/etc/nixos/configuration.nix

# Bake the injected nina binary (prove-the-loop: absolute-path /root/nina).
install -Dm755 "$SEED_DIR/nina" /mnt/root/nina

nixos-install --no-root-passwd --root /mnt

echo "=== NINA_INSTALL_DONE ==="
sync
poweroff