signal-desktop: use 6.19.0 from overlay

overlays/signal-desktop.nix

@@ -0,0 +1,26 @@
+final: prev: {
+  signal-desktop = prev.signal-desktop.overrideAttrs (oldAttrs: rec {
+    pname = "signal-desktop";
+    dir = "Signal";
+    version = "6.19.0";
+    hash = "sha256-D54A9z5+Y3ns363Zl8IChnykEBhOz8aJCgTCQIjq/fc=";
+
+    src = prev.fetchurl {
+      url = "https://updates.signal.org/desktop/apt/pool/main/s/${pname}/${pname}_${version}_amd64.deb";
+      inherit hash;
+    };
+
+    preFixup = ''
+      gappsWrapperArgs+=(
+        --prefix LD_LIBRARY_PATH : "${prev.lib.makeLibraryPath [prev.stdenv.cc.cc]}"
+        --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--ozone-platform-hint=auto --enable-features=WaylandWindowDecorations}}"
+        --suffix PATH : ${prev.lib.makeBinPath [prev.xdg-utils]}
+      )
+      # Fix the desktop link
+      substituteInPlace $out/share/applications/${pname}.desktop \
+        --replace "/opt/${dir}/${pname}" $out/bin/${pname}
+      autoPatchelf --no-recurse -- "$out/lib/${dir}/"
+      patchelf --add-needed ${prev.libpulseaudio}/lib/libpulse.so "$out/lib/${dir}/resources/app.asar.unpacked/node_modules/@signalapp/ringrtc/build/linux/libringrtc-x64.node"
+    '';
+  });
+}