nixos/overlays/inject.nix

{
	pkgs,
	git,
	...
}:

pkgs.writeShellScriptBin "inject-nixos-config" ''
hostname="''${1}"
if [ -n "''${hostname}"]; then
	echo "You must provide a hostname";
	exit 1;
fi

mv /etc/nixos /etc/nixos.bk
cd /etc
${git}/bin/git clone http://github.com/greg-hellings/nixos-config nixos
mkdir -p "/etc/nixos/hosts/''${hostname}"

# Prepares everything for the flake usage
cp /etc/nixos.bk/configuration.nix "/etc/nixos/hosts/''${hostname}/default.nix"
cp /etc/nixos.bk/hardware-configuration.nix "/etc/nixos/hosts/''${hostname}/hardware-configuration.nix"

# Prepares it for injecting the use case into the flake usage
cp /etc/nixos.bk/hardware-configuration.nix /etc/nixos
chown -R greg nixos

echo "Now you should be able to just run 'nixos-rebuild switch' to enable the flake functionality"
echo "After that and adding the entry to the flake, run 'nixos-rebuild boot --flake '.#''${hostname}' and reboot"
''