Add futurewareSource module

flake.nix

@@ -5,6 +5,7 @@
     nixosModules = {
       nix-settings = import ./modules/nix-settings.nix;
       nix-gc = import ./modules/nix-gc.nix;
+      futureware = import ./modules/futureware.nix;
     };
   };
 }

modules/futureware.nix

@@ -0,0 +1,26 @@
+{ config, lib, ... }:
+
+let
+  cfg = config.futurewareSource;
+in
+{
+  options.futurewareSource = lib.mkOption {
+    type = lib.types.enum [
+      "github"
+      "dasfoo"
+    ];
+    default = "github";
+    description = ''
+      Where to pull FutureWare projects from. Typically only necessary on
+      internal, constrained FutureWare servers.
+    '';
+  };
+
+  config = lib.mkIf (cfg == "dasfoo") {
+    programs.git.enable = true;
+    programs.git.config = {
+      url."https://git.sheremet.ch/futureware-tech/nix.git".insteadOf =
+        "https://github.com/futureware-tech/nix.git";
+    };
+  };
+}