keymapp: add darwin platform

pkgs/by-name/ke/keymapp/package.nix

@@ -9,66 +9,96 @@
   webkitgtk_4_1,
   makeDesktopItem,
   copyDesktopItems,
+  undmg,
 }:
 let
-  desktopItem = makeDesktopItem {
-    name = "keymapp";
-    icon = "keymapp";
-    desktopName = "Keymapp";
-    categories = [
-      "Settings"
-      "HardwareSettings"
-    ];
-    type = "Application";
-    exec = "keymapp";
-  };
-in
-stdenv.mkDerivation rec {
   pname = "keymapp";
   version = "1.3.6";
-
-  src = fetchurl {
-    url = "https://oryx.nyc3.cdn.digitaloceanspaces.com/keymapp/keymapp-${version}.tar.gz";
-    hash = "sha256-LWO4aeNmGgZ+T41pb6HwC3tnwaiGviDIq63QMsrlkEc=";
-  };
-
-  nativeBuildInputs = [
-    copyDesktopItems
-    autoPatchelfHook
-    wrapGAppsHook4
-  ];
-
-  buildInputs = [
-    libusb1
-    webkitgtk_4_1
-    libsoup_3
-  ];
-
-  sourceRoot = ".";
-
-  installPhase = ''
-    runHook preInstall
-
-    install -m755 -D keymapp "$out/bin/keymapp"
-    install -Dm644 icon.png "$out/share/pixmaps/keymapp.png"
-
-    runHook postInstall
-  '';
-
-  preFixup = ''
-    gappsWrapperArgs+=(--set-default '__NV_PRIME_RENDER_OFFLOAD' 1)
-  '';
-
-  desktopItems = [ desktopItem ];
-
-  meta = with lib; {
+  meta = {
     homepage = "https://www.zsa.io/flash/";
     description = "Application for ZSA keyboards";
     maintainers = with lib.maintainers; [
       jankaifer
       shawn8901
     ];
-    platforms = platforms.linux;
+    platforms = lib.platforms.linux ++ lib.platforms.darwin;
     license = lib.licenses.unfree;
   };
-}
+
+  linux = stdenv.mkDerivation (finalAttrs: {
+    inherit pname version meta;
+
+    src = fetchurl {
+      url = "https://oryx.nyc3.cdn.digitaloceanspaces.com/keymapp/keymapp-${finalAttrs.version}.tar.gz";
+      hash = "sha256-LWO4aeNmGgZ+T41pb6HwC3tnwaiGviDIq63QMsrlkEc=";
+    };
+
+    nativeBuildInputs = [
+      copyDesktopItems
+      autoPatchelfHook
+      wrapGAppsHook4
+    ];
+
+    buildInputs = [
+      libusb1
+      webkitgtk_4_1
+      libsoup_3
+    ];
+
+    sourceRoot = ".";
+
+    installPhase = ''
+      runHook preInstall
+
+      install -m755 -D keymapp "$out/bin/keymapp"
+      install -Dm644 icon.png "$out/share/pixmaps/keymapp.png"
+
+      runHook postInstall
+    '';
+
+    preFixup = ''
+      gappsWrapperArgs+=(--set-default '__NV_PRIME_RENDER_OFFLOAD' 1)
+    '';
+
+    desktopItem = makeDesktopItem {
+      name = "keymapp";
+      icon = "keymapp";
+      desktopName = "Keymapp";
+      categories = [
+        "Settings"
+        "HardwareSettings"
+      ];
+      type = "Application";
+      exec = "keymapp";
+    };
+  });
+
+  darwin = stdenv.mkDerivation (finalAttrs: {
+    inherit pname version meta;
+
+    src = fetchurl {
+      # Upstream does not provide archives of previous versions,
+      # therefore a capture using the wayback machine is used
+      url = "https://web.archive.org/web/20250427080926/https://oryx.nyc3.cdn.digitaloceanspaces.com/keymapp/keymapp-latest.dmg";
+      hash = "sha256-sn8IkSV8AEqm8z/TiS1399hITBC9lnSSjQn/k0xWl6I=";
+    };
+
+    dontPatch = true;
+    dontConfigure = true;
+    dontBuild = true;
+
+    nativeBuildInputs = [ undmg ];
+
+    sourceRoot = ".";
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/Applications
+      mv Keymapp.app $out/Applications
+
+      runHook postInstall
+    '';
+  });
+in
+if stdenv.hostPlatform.isDarwin then darwin else linux