packages.desktop: auto add wallpaper

flake.nix

@@ -204,5 +204,15 @@
             CMAKE_EXPORT_COMPILE_COMMANDS = "1";
           };
       };
+      src = let inherit (inputs.self.packages.x86_64-linux) pkgs; in
+      {
+        nixos-wallpaper = pkgs.fetchgit
+        {
+          url = "https://git.chn.moe/chn/nixos-wallpaper.git";
+          rev = "1ad78b20b21c9f4f7ba5f4c897f74276763317eb";
+          sha256 = "0faahbzsr44bjmwr6508wi5hg59dfb57fzh5x6jh7zwmv4pzhqlb";
+          fetchLFS = true;
+        };
+      };
     };
 }

modules/packages/desktop/default.nix

@@ -95,13 +95,21 @@ inputs:
       [{
         config.programs =
         {
-          plasma = 
+          plasma =
           {
             enable = true;
             configFile =
             {
               plasma-localerc = { Formats.LANG.value = "en_US.UTF-8"; Translations.LANGUAGE.value = "zh_CN"; };
               baloofilerc."Basic Settings".Indexing-Enabled.value = false;
+              plasmarc.Wallpapers.usersWallpapers.value =
+                let
+                  inherit (inputs.topInputs.self.src) nixos-wallpaper;
+                  isPicture = f: builtins.elem (inputs.lib.last (inputs.lib.splitString "." f))
+                    [ "png" "jpg" "jpeg" "webp" ];
+                in builtins.concatStringsSep "," (builtins.map (f: "${nixos-wallpaper}/${f.name}")
+                  (builtins.filter (f: (isPicture f.name) && (f.value == "regular"))
+                    (inputs.localLib.attrsToList (builtins.readDir nixos-wallpaper))));
             };
             powerdevil =
               let config =

modules/user/chn/plasma/wallpaper.nix

@@ -2,13 +2,7 @@ inputs:
 {
   config.home-manager.users.chn.config.programs.plasma.configFile =
     let
-      nixos-wallpaper = inputs.pkgs.fetchgit
-      {
-        url = "https://git.chn.moe/chn/nixos-wallpaper.git";
-        rev = "1ad78b20b21c9f4f7ba5f4c897f74276763317eb";
-        sha256 = "0faahbzsr44bjmwr6508wi5hg59dfb57fzh5x6jh7zwmv4pzhqlb";
-        fetchLFS = true;
-      };
+      inherit (inputs.topInputs.self.src) nixos-wallpaper;
       wallpaper =
       {
         pc = "${nixos-wallpaper}/pixiv-117612023.png";