pipewire: add option to disable systemd support

pkgs/development/libraries/pipewire/default.nix

@@ -6,7 +6,9 @@
 , python3
 , meson
 , ninja
+, eudev
 , systemd
+, enableSystemd ? true
 , pkg-config
 , docutils
 , doxygen
@@ -127,8 +129,8 @@ let
       vulkan-headers
       vulkan-loader
       webrtc-audio-processing
-      systemd
-    ] ++ lib.optionals gstreamerSupport [ gst_all_1.gst-plugins-base gst_all_1.gstreamer ]
+    ] ++ (if enableSystemd then [ systemd ] else [ eudev ])
+    ++ lib.optionals gstreamerSupport [ gst_all_1.gst-plugins-base gst_all_1.gstreamer ]
     ++ lib.optionals libcameraSupport [ libcamera libdrm ]
     ++ lib.optional ffmpegSupport ffmpeg
     ++ lib.optionals bluezSupport [ bluez libfreeaptx ldacbt sbc fdk_aac ]
@@ -153,7 +155,9 @@ let
       "-Dlibpulse=${mesonEnableFeature pulseTunnelSupport}"
       "-Davahi=${mesonEnableFeature zeroconfSupport}"
       "-Dgstreamer=${mesonEnableFeature gstreamerSupport}"
-      "-Dsystemd-system-service=enabled"
+      "-Dsystemd-system-service=${mesonEnableFeature enableSystemd}"
+      "-Dudev=${mesonEnableFeature (!enableSystemd)}"
+      "-Dudevrulesdir=${placeholder "out"}/lib/udev/rules.d"
       "-Dffmpeg=${mesonEnableFeature ffmpegSupport}"
       "-Dbluez5=${mesonEnableFeature bluezSupport}"
       "-Dbluez5-backend-hsp-native=${mesonEnableFeature nativeHspSupport}"
@@ -193,8 +197,11 @@ let
         cp ${buildPackages.pipewire}/nix-support/*.json "$out/nix-support"
       ''}
 
-      moveToOutput "share/systemd/user/pipewire-pulse.*" "$pulse"
-      moveToOutput "lib/systemd/user/pipewire-pulse.*" "$pulse"
+      ${lib.optionalString enableSystemd ''
+        moveToOutput "share/systemd/user/pipewire-pulse.*" "$pulse"
+        moveToOutput "lib/systemd/user/pipewire-pulse.*" "$pulse"
+      ''}
+
       moveToOutput "bin/pipewire-pulse" "$pulse"
 
       moveToOutput "bin/pw-jack" "$jack"