{ lib, config, ... }:

with lib;
let
  cfg = config.colinsane.nixcache;
in
{
  options = {
    colinsane.nixcache.enable = mkOption {
      default = false;
      type = types.bool;
    };
  };

  config = {
    # use our own binary cache
    nix.settings = mkIf cfg.enable {
      substituters = [
        "https://nixcache.uninsane.org"
        "https://nix-community.cachix.org"
        "https://cache.nixos.org/"
      ];
      trusted-public-keys = [
        "nixcache.uninsane.org:r3WILM6+QrkmsLgqVQcEdibFD7Q/4gyzD9dGT33GP70="
        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
      ];
    };

    # allow `nix flake ...` command
    nix.extraOptions = ''
      experimental-features = nix-command flakes
    '';
  };
}