nixos/overlays/inject-darwin.nix

{ pkgs
, coreutils
, curl
, gnutar
, nix
, ...
}:
pkgs.writeShellScriptBin "inject-darwin" ''
  set -ex
  set -o pipefail

  dir="$(${coreutils}/bin/mktemp -d)"
  cd "''${dir}"

  # Install nix-darwin
  ${nix}/bin/nix-build https://github.com/LnL7/nix-darwin/archive/master.tar.gz -A installer
  ./result/bin/darwin-installer

  # Get my configuration
  mkdir -p ~/.config/darwin
  cd ~/.config/darwin
  ${curl}/bin/curl -O -L https://github.com/greg-hellings/nixos-config/archive/refs/heads/main.tar.gz
  ${gnutar}/bin/tar xvzf main.tar.gz --strip-components 1

  # Build NixOS for this system
  pushd "''${dir}"
  ${nix}/bin/nix build "~/.config/darwin#darwinConfigurations.$(hostname -s).system"
  ./result/sw/bin/darwin-rebuild switch --flake ~/.config/darwin
  popd
  rm -r "''${dir}"
''