5 files changed, 76 insertions, 0 deletions
diff --git a/nixos/modules/cachix/caches/nix-community.nix b/nixos/modules/cachix/caches/nix-community.nix
new file mode 100644
index 0000000..2b4c408
--- /dev/null
+++ b/nixos/modules/cachix/caches/nix-community.nix
@@ -0,0 +1,12 @@
+{ config, lib, ... }:
+
+{
+  nix = {
+    binaryCaches = [
+      "https://nix-community.cachix.org"
+    ];
+    binaryCachePublicKeys = [
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
+  };
+}
diff --git a/nixos/modules/cachix/default.nix b/nixos/modules/cachix/default.nix
new file mode 100644
index 0000000..38ad575
--- /dev/null
+++ b/nixos/modules/cachix/default.nix
@@ -0,0 +1,13 @@
+{ config, pkgs, lib, ... }:
+let
+  folder = ./caches;
+  toImport = name: value: folder + ("/" + name);
+  filterCaches = key: value: value == "regular" && lib.hasSuffix ".nix" key;
+  imports = lib.mapAttrsToList toImport (lib.filterAttrs filterCaches (builtins.readDir folder));
+in
+{
+  inherit imports;
+  nix.binaryCaches = [ "https://cache.nixos.org/" ];
+
+  environment.systemPackages = [ pkgs.cachix ];
+}
diff --git a/nixos/modules/default.nix b/nixos/modules/default.nix
new file mode 100644
index 0000000..f17f392
--- /dev/null
+++ b/nixos/modules/default.nix
@@ -0,0 +1,5 @@
+{
+  cachix = import ./cachix;
+  flake = import ./flake.nix;
+  nix = import ./nix.nix;
+}
diff --git a/nixos/modules/flake.nix b/nixos/modules/flake.nix
new file mode 100644
index 0000000..a88f9d0
--- /dev/null
+++ b/nixos/modules/flake.nix
@@ -0,0 +1,12 @@
+{ config, pkgs, lib, ... }:
+
+{
+  options.nix.flakes.enable = lib.mkEnableOption "nix flakes";
+
+  config = lib.mkIf config.nix.flakes.enable {
+    nix = {
+      package = pkgs.nixUnstable;
+      experimentalFeatures = "nix-command flakes";
+    };
+  };
+}
diff --git a/nixos/modules/nix.nix b/nixos/modules/nix.nix
new file mode 100644
index 0000000..04fafac
--- /dev/null
+++ b/nixos/modules/nix.nix
@@ -0,0 +1,34 @@
+{ config, lib, ... }:
+
+let
+  allowed = config.nix.allowedUnfree;
+in
+{
+  options.nix = {
+    experimentalFeatures = lib.mkOption {
+      type = lib.types.separatedString " ";
+      default = "";
+      description = ''
+        Enables experimental features
+      '';
+    };
+
+    allowedUnfree = lib.mkOption {
+      type = lib.types.listOf lib.types.string;
+      default = [ ];
+      description = ''
+        Allows for  unfree packages by their name.
+      '';
+    };
+  };
+
+  config = lib.mkMerge [
+    (lib.mkIf (config.nix.experimentalFeatures != "") { nix.extraOptions = "experimental-features = ${config.nix.experimentalFeatures}"; })
+    (lib.mkIf (allowed != [ ]) { nixpkgs.config.allowUnfreePredicate = (pkg: __elem (lib.getName pkg) allowed); })
+    { nix.autoOptimiseStore = lib.mkDefault true; }
+    {
+      nix.gc.automatic = lib.mkDefault true;
+      nix.gc.options = lib.mkDefault "--delete-older-than 10d";
+    }
+  ];
+}