From d56a48cf65585add4e7bcd29ee0609ff2ea73db8 Mon Sep 17 00:00:00 2001
From: Noah Masur <7386960+nmasur@users.noreply.github.com>
Date: Sat, 25 Feb 2023 11:22:31 -0500
Subject: [PATCH] add zfs module with options

---
 hosts/swan/default.nix             |  7 ++++---
 modules/nixos/hardware/default.nix |  1 +
 modules/nixos/hardware/zfs.nix     | 14 ++++++++++++++
 3 files changed, 19 insertions(+), 3 deletions(-)
 create mode 100644 modules/nixos/hardware/zfs.nix

diff --git a/hosts/swan/default.nix b/hosts/swan/default.nix
index ba632f0..c207deb 100644
--- a/hosts/swan/default.nix
+++ b/hosts/swan/default.nix
@@ -19,6 +19,7 @@ nixpkgs.lib.nixosSystem {
     disko.nixosModules.disko
     {
       server = true;
+      zfs.enable = true;
       gui.enable = false;
       theme = { colors = (import ../../colorscheme/gruvbox).dark; };
       nixpkgs.overlays = overlays;
@@ -36,9 +37,9 @@ nixpkgs.lib.nixosSystem {
 
       neovim.enable = true;
 
-      boot.zfs.enabled = true;
-      boot.kernelPackages =
-        config.boot.zfs.package.latestCompatibleLinuxPackages;
+      # boot.zfs.enabled = true;
+      # boot.kernelPackages =
+      # config.boot.zfs.package.latestCompatibleLinuxPackages;
       # boot.zfs.extraPools = [ "mypool" ];
       # services.zfs.autoScrub.enable = true;
       # services.zfs.autoScrub.interval = "daily";
diff --git a/modules/nixos/hardware/default.nix b/modules/nixos/hardware/default.nix
index 8dd57a5..6d3f9f0 100644
--- a/modules/nixos/hardware/default.nix
+++ b/modules/nixos/hardware/default.nix
@@ -10,6 +10,7 @@
     ./server.nix
     ./sleep.nix
     ./wifi.nix
+    ./zfs.nix
   ];
 
   options = {
diff --git a/modules/nixos/hardware/zfs.nix b/modules/nixos/hardware/zfs.nix
new file mode 100644
index 0000000..07b82ea
--- /dev/null
+++ b/modules/nixos/hardware/zfs.nix
@@ -0,0 +1,14 @@
+{ config, pkgs, lib, ... }: {
+
+  options = { zfs.enable = lib.mkEnableOption "ZFS file system."; };
+
+  config =
+    lib.mkIf (pkgs.stdenv.isLinux && config.server && config.zfs.enable) {
+
+      # Only use compatible Linux kernel, since ZFS can be behind
+      boot.kernelPackages =
+        config.boot.zfs.package.latestCompatibleLinuxPackages;
+
+    };
+
+}