Ensure partition presence using partprobe

lib/modules/partition/disks.nix

@@ -8,6 +8,7 @@
     fs = import ./fs.nix;
 
     diskListVarName = "myDisks";
+    probeScript = "partprobe 2> /dev/null || true";
     isSwap = partition: builtins.elem partition.type [fs.swap 19];
 
     mkDiskType = osDisk: types.submodule (
@@ -136,14 +137,7 @@
 
                   create = lib.strings.concatLines [
                     (appendScript "${toString index}: \"$(${sizeOption})\" type=${mkType type}")
-                    # Wait for partition to be detected
-                    ''echo "Waiting for ${partVar} to appear..."''
-                    ''
-                      while true;
-                      do
-                        [ -b ${partVar} ] && break;
-                      done;
-                    ''
+                    probeScript
                     "sudo ${formatScripts.${format}}"
                   ];
 
@@ -329,13 +323,7 @@
               mountScript = lib.strings.concatLines (
                 builtins.concatMap
                   (_: [
-                  ''echo "Waiting for "${lib.strings.escapeShellArg (partPath _)}" to appear..."''
-                  ''
-                    while true;
-                    do
-                      [ -b ${lib.strings.escapeShellArg (partPath _)} ] && break
-                    done
-                  ''
+                    probeScript
                     (builtins.concatStringsSep " " [
                       "sudo"
                       "mount"
@@ -351,7 +339,10 @@
 
               swapScript = lib.strings.concatLines (
                 builtins.map
-                  (_: "sudo swapon ${partPath _}")
+                  (_: ''
+                    ${probeScript}
+                    sudo swapon ${partPath _}
+                  '')
                   (builtins.filter (_: _.useSwap) partitions));
             in lib.strings.concatLines (
               (builtins.map (_: _.deviceScript) disks) ++ lib.optionals ((builtins.length disks) > 0) [