Merge pull request #269353 from kylehendricks/snapraid-fix-split-parity2

snapraid: fix split parity files

nixos/doc/manual/release-notes/rl-2311.section.md

@@ -1308,6 +1308,9 @@ Make sure to also check the many updates in the [Nixpkgs library](#sec-release-2
   qemu-vm module from overriding `fileSystems` by setting
   `virtualisation.fileSystems = lib.mkForce { };`.
 
+- When using [split parity files](https://www.snapraid.it/manual#7.1) in `snapraid`,
+  the snapraid-sync systemd service will no longer fail to run.
+
 ## Nixpkgs Library {#sec-release-23.11-nixpkgs-lib}
 
 ### Breaking Changes {#sec-release-23.11-lib-breaking}

nixos/modules/tasks/snapraid.nix

@@ -217,9 +217,13 @@ in
               # to remove them if they are stale
               let
                 contentDirs = map dirOf contentFiles;
+                # Multiple "split" parity files can be specified in a single
+                # "parityFile", separated by a comma.
+                # https://www.snapraid.it/manual#7.1
+                splitParityFiles = map (s: splitString "," s) parityFiles;
               in
               unique (
-                attrValues dataDisks ++ parityFiles ++ contentDirs
+                attrValues dataDisks ++ splitParityFiles ++ contentDirs
               );
           } // optionalAttrs touchBeforeSync {
             ExecStartPre = "${pkgs.snapraid}/bin/snapraid touch";