dotfiles/apps/installer.nix

{ pkgs, ... }: {

  # Inspired by https://github.com/cleverca22/nix-tests/blob/master/kexec/justdoit.nix
  # This script will partition and format drives; use at your own risk!

  type = "app";

  program = builtins.toString (pkgs.writeShellScript "installer" ''
    set -e

    DISK=$1
    FLAKE=$2
    PARTITION_PREFIX=""

    if [ -z "$DISK" ] || [ -z "$FLAKE" ]; then
        ${pkgs.gum}/bin/gum style --width 50 --margin "1 2" --padding "2 4" \
            --foreground "#fb4934" \
            "Missing required parameter." \
            "Usage: installer -- <disk> <host>" \
            "Example: installer -- nvme0n1 desktop" \
            "Flake example: nix run github:nmasur/dotfiles#installer -- nvme0n1 desktop"
        echo "(exiting)"
        exit 1
    fi

    case "$DISK" in nvme*)
        PARTITION_PREFIX="p"
    esac

    ${pkgs.gum}/bin/gum confirm \
        "This will ERASE ALL DATA on the disk /dev/''${DISK}. Are you sure you want to continue?" \
        --default=false

    ${pkgs.parted}/bin/parted /dev/''${DISK} -- mklabel gpt
    ${pkgs.parted}/bin/parted /dev/''${DISK} -- mkpart primary 512MiB 100%
    ${pkgs.parted}/bin/parted /dev/''${DISK} -- mkpart ESP fat32 1MiB 512MiB
    ${pkgs.parted}/bin/parted /dev/''${DISK} -- set 3 esp on
    mkfs.ext4 -L nixos /dev/''${DISK}''${PARTITION_PREFIX}1
    mkfs.fat -F 32 -n boot /dev/''${DISK}''${PARTITION_PREFIX}2

    mount /dev/disk/by-label/nixos /mnt
    mkdir --parents /mnt/boot
    mount /dev/disk/by-label/boot /mnt/boot

    ${pkgs.nixos-install-tools}/bin/nixos-install --flake github:nmasur/dotfiles#''${FLAKE}
  '');

}