Wallpaper Engine on NixOS (wallpaper-engine-kde-plugin)

turtton · March 16, 2024, 12:38pm

Oh. My nix file looks not perfect yet.
I have noticed some points after commenting

It installs only lib, so you need to install plugin manually.(Originally, the plugin should also be installed)
Some wallpaper that worked on ArchLinux does not work on my Nix environment.

Despite the problems, I am somewhat satisfied with current situation. If you find a solution, I world be glad to know.

xerhaxs · March 16, 2024, 1:29pm

As mentioned above, it is possible to install the wallpaper plugin if you turn DUSE_PLASMAPKG OFF, but then the following error appear:

Python helper run failed:
python3: can’t open file ‘/home/spp/no_pyext_file_found’: [Errno 2] No such file or directory

xerhaxs · March 16, 2024, 1:50pm

What I also found out is that in the “About-Tab” of the wallpaper engine settings, their are no pythone3-websocket dependencies found.
Since you installed it manually, is the check mark displayed?

turtton · March 17, 2024, 2:07am

As mentioned above, it is possible to install the wallpaper plugin if you turn DUSE_PLASMAPKG OFF, but then the following error appear

I could not reproduce it. I turn DUSE_PLASMAPKG OFF but build works fine and plugin not installed.

github.com

turtton/dotnix/blob/a40b27232011435a0b8e60baa8d0af169f97e3f0/os/wm/plasma5.nix#L33


      
            fetchSubmodules = true;
          };
          nativeBuildInputs = [
            cmake extra-cmake-modules glslang-submodule pkg-config gst_all_1.gst-libav shaderc
          ];
          buildInputs = [
            mpv lz4 vulkan-headers vulkan-tools vulkan-loader
          ] 
          ++ (with libsForQt5; with qt5; [plasma-framework qtwebsockets qtwebchannel qtx11extras qtdeclarative])
          ++ [(python3.withPackages (python-pkgs: [ python-pkgs.websockets ]))];
          cmakeFlags = [ "-DUSE_PLASMAPKG=OFF" ];
          dontWrapQtApps = true;
          postPatch = ''
            rm -rf src/backend_scene/third_party/glslang
            ln -s ${glslang-submodule.src} src/backend_scene/third_party/glslang
          '';
          #Optional informations
          meta = with lib; {
            description = "Wallpaper Engine KDE plasma plugin";
            homepage = "https://github.com/Jelgnum/wallpaper-engine-kde-plugin";
            license = licenses.gpl2Plus;

What I also found out is that in the “About-Tab” of the wallpaper engine settings, their are no pythone3-websocket dependencies found.
Since you installed it manually, is the check mark displayed?

Yes.

I have added it here.

github.com

turtton/dotnix/blob/a40b27232011435a0b8e60baa8d0af169f97e3f0/os/wm/plasma5.nix#L64


      
            };
            environment.systemPackages = with pkgs; with libsForQt5; [
              latte-dock
              kdePackages.discover
              kdePackages.kgpg
              applet-window-buttons
              yakuake
              ### wallpaper-engine-plugin
              wallpaper-engine-kde-plugin
              qt5.qtwebsockets
              (python3.withPackages (python-pkgs: [ python-pkgs.websockets ]))
              ### 
            ];
          }

Make sure there are no conflicts with python3 installed elsewhere, like this

xerhaxs · March 17, 2024, 11:36am

I copied your config for wallpaper engine one by one and if I set

"-DUSE_PLASMAPKG=OFF"

wallpaper engine gets installed and I do not need to install it manually. But I always get the missing dependencies error mentioned above.

turtton · March 18, 2024, 11:43am

I was able to reproduce your situation after uninstalling plugin that installed manually, and I noticed that the folder com.github.casout.wallpaperEngineKde in ~/.local/share/plasma/wallpapers/ has been deleted.
I checked and nix had installed it on /run/current-system/sw/share/plasma/wallpapers and KDE cannot seem to recognize.

Finally I solved this problem by adding a small script. I would like to know if there is a better way to add the folder in user .local directory.

xerhaxs · March 18, 2024, 4:32pm

Thank you so much! It’s working now without any problems.
And I think your solution with the startup script is fine.

niscolas · March 22, 2024, 2:23am

Hey, that’s awesome! You should make a PR to include it in Nixpkgs!

turtton · March 22, 2024, 8:28am

To do that, I need to fix this problem and do everything in mkDerivation, but have not found a good way😇

plokid · May 30, 2024, 3:10pm

anyone knows how to use it on plasma6?

rafaribe · July 15, 2024, 11:22pm

Does this work on plasma 6 under wayland?