Migrate Lewis to this repo

nixos/data-sharing.nix

@@ -0,0 +1,47 @@
+{
+  lib,
+  config,
+  ...
+}: let
+  cfg = config.pim.data-sharing;
+
+  nfsShares = [
+    "/mnt/longhorn/persistent/media"
+    "/mnt/longhorn/persistent/media/books"
+    "/mnt/longhorn/persistent/media/movies"
+    "/mnt/longhorn/persistent/media/music"
+    "/mnt/longhorn/persistent/media/shows"
+    "/mnt/longhorn/persistent/longhorn-backup"
+  ];
+
+  nfsExports = lib.strings.concatLines (
+    builtins.map
+    (
+      share: "${share} 192.168.30.0/16(rw,sync,no_subtree_check,no_root_squash) 127.0.0.1/8(rw,sync,no_subtree_check,no_root_squash) 10.0.0.0/8(rw,sync,no_subtree_check,no_root_squash)"
+    )
+    nfsShares
+  );
+in {
+  options.pim.data-sharing = {
+    enable = lib.mkOption {
+      default = false;
+      type = lib.types.bool;
+      description = ''
+        Configure this server to serve our data using NFS.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    networking.firewall.allowedTCPPorts = [
+      2049 # NFS
+      111 # NFS
+      20048 # NFS
+    ];
+
+    services.nfs.server = {
+      enable = true;
+      exports = nfsExports;
+    };
+  };
+}