#!/usr/bin/env bash

set -eo pipefail

if [[ -f /etc/nixos/.system-installed ]]; then
    echo "=== System config already installed, skipping"
else
    echo "==> Installing system config"

    [[ -d /etc/nixos ]] && sudo mv /etc/nixos{,.bak}
    sudo mkdir -p /etc/nixos
    sudo cp /etc/nixos.bak/hardware-configuration.nix /etc/nixos

    sudo cp ./system/configuration.nix /etc/nixos/
    sudo ln -s $(pwd)/system/{machines,modules,pkgs} /etc/nixos
    sudo touch /etc/nixos/.system-installed

    echo "==> System config installed, your old configuration is at /etc/nixos.bak"
fi
echo

if [[ -f ~/.config/nixpkgs/system-installed ]]; then
    echo "=== home-manager config already installed, skipping"
else
    echo "==> Installing home-manager config"
    nix-channel --add https://github.com/rycee/home-manager/archive/master.tar.gz home-manager
    nix-channel --update
    # nix-shell '<home-manager>' -A install

    [[ -d ~/.config/nixpkgs ]] && mv ~/.config/{nixpkgs,nixpkgs.bak}
    mkdir -p ~/.config/nixpkgs
    ln -s $(pwd)/home/* ~/.config/nixpkgs

    echo "==> home-manager config installed"
fi