From 830dcbf6bc745bb154b1d8e5703f78134489eb5f Mon Sep 17 00:00:00 2001
From: Yureka <yuka@yuka.dev>
Date: Sat, 3 Aug 2024 18:41:01 +0200
Subject: [PATCH] builders: do not mount / and /boot on netboot systems

---
 services/baremetal-builder/default.nix | 45 ++++++++++++++------------
 1 file changed, 25 insertions(+), 20 deletions(-)

diff --git a/services/baremetal-builder/default.nix b/services/baremetal-builder/default.nix
index 7f57d4d..89936ff 100644
--- a/services/baremetal-builder/default.nix
+++ b/services/baremetal-builder/default.nix
@@ -55,29 +55,34 @@ in
 
     boot.initrd.services.lvm.enable = true;
 
-    fileSystems."/" = {
-      device = "/dev/disk/by-label/root";
-      fsType = "xfs";
-    };
-
-    fileSystems."/mnt" = {
-      device = "/dev/disk/by-label/hydra";
-      fsType = "xfs";
-      options = ["logbsize=256k"];
-    };
     boot.kernel.sysctl."fs.xfs.xfssyncd_centisecs" = "12000";
+    fileSystems = lib.mkMerge [
+      {
+        "/" = {
+          device = "/dev/disk/by-label/root";
+          fsType = "xfs";
+        };
 
-    # We want the tmp filesystem on the same filesystem as the hydra store, so that builds can use reflinks
-    fileSystems."/tmp" = {
-      device = "/mnt/tmp";
-      options = [ "bind" ];
-    };
+        "/boot" = {
+          device = "/dev/disk/by-label/BOOT";
+          fsType = "vfat";
+          options = [ "fmask=0022" "dmask=0022" ];
+        };
+      }
+      (lib.mkIf (!cfg.netboot) {
+        "/mnt" = {
+          device = "/dev/disk/by-label/hydra";
+          fsType = "xfs";
+          options = ["logbsize=256k"];
+        };
 
-    fileSystems."/boot" = {
-      device = "/dev/disk/by-label/BOOT";
-      fsType = "vfat";
-      options = [ "fmask=0022" "dmask=0022" ];
-    };
+        # We want the tmp filesystem on the same filesystem as the hydra store, so that builds can use reflinks
+        "/tmp" = {
+          device = "/mnt/tmp";
+          options = [ "bind" ];
+        };
+      })
+    ];
 
     swapDevices = lib.optionals (!cfg.netboot) [
       {