refactor: switch from using UUIDs for filesystems to partlabels. Requires partition modifications on hosts before rebuild

hosts/shared/fs-layouts/single-disk-btrfs.nix

@@ -0,0 +1,36 @@
+{ _, ... }:
+{
+  # RECOMMENDED BTRFS SUBVOLUME LAYOUT
+  # /home
+  # /home/.snapshots (needed if snapper on home dir to be enabled)
+  # /srv
+  # /var/lib/portables
+  # /var/lib/machines
+  # /tmp
+  # /var/tmp
+  #
+  # REQUIRED PARTLABELS (can be set in parted or other tools NOT!!! FILESYSTEM LABEL!)
+  # /     - NIXOS
+  # /boot - ESP
+  # swap  - SWAP
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-partlabel/NIXOS";
+      fsType = "btrfs";
+    };
+
+    "/boot" = {
+      device = "/dev/disk/by-partlabel/ESP";
+      fsType = "vfat";
+      options = [
+        "fmask=0077"
+        "dmask=0077"
+      ];
+    };
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-partlabel/SWAP"; }
+  ];
+}

hosts/shared/fs-layouts/single-disk-xfs.nix

@@ -0,0 +1,27 @@
+{ _, ... }:
+{
+  # REQUIRED PARTLABELS (can be set in parted or other tools NOT!!! FILESYSTEM LABEL!)
+  # /     - NIXOS
+  # /boot - ESP
+  # swap  - SWAP
+
+  fileSystems = {
+    "/" = {
+      device = "/dev/disk/by-partlabel/NIXOS";
+      fsType = "xfs";
+    };
+
+    "/boot" = {
+      device = "/dev/disk/by-partlabel/ESP";
+      fsType = "vfat";
+      options = [
+        "fmask=0077"
+        "dmask=0077"
+      ];
+    };
+  };
+
+  swapDevices = [
+    { device = "/dev/disk/by-partlabel/SWAP"; }
+  ];
+}