jan: add darwin support

pkgs/by-name/ja/jan/package.nix

@@ -5,31 +5,29 @@
   config,
   cudaPackages,
   cudaSupport ? config.cudaSupport,
+  stdenv,
+  fetchzip,
+  makeWrapper,
 }:
 
 let
   pname = "Jan";
   version = "0.7.5";
-  src = fetchurl {
+
+  darwin-src = fetchzip {
+    url = "https://github.com/janhq/jan/releases/download/v${version}/jan-mac-universal-${version}.zip";
+    hash = "sha256-stTsLKE+2gUKAVwJ2/gOckoL6Nygwr0rkugD1jGj1w4=";
+  };
+
+  linux-src = fetchurl {
     url = "https://github.com/janhq/jan/releases/download/v${version}/jan_${version}_amd64.AppImage";
     hash = "sha256-RIEBpeogNIDPMpoY5Gk8q4+t7jxcWJEZLPqJHWyaVk4=";
   };
 
-  appimageContents = appimageTools.extractType2 { inherit pname version src; };
-in
-appimageTools.wrapType2 {
-  inherit pname version src;
-
-  extraInstallCommands = ''
-    install -Dm444 ${appimageContents}/Jan.desktop -t $out/share/applications
-    cp -r ${appimageContents}/usr/share/icons $out/share
-  '';
-
-  extraPkgs =
-    pkgs:
-    lib.optionals cudaSupport [
-      cudaPackages.cudatoolkit
-    ];
+  appimageContents = appimageTools.extractType2 {
+    inherit pname version;
+    src = linux-src;
+  };
 
   meta = {
     changelog = "https://github.com/janhq/jan/releases/tag/v${version}";
@@ -38,6 +36,57 @@ appimageTools.wrapType2 {
     license = lib.licenses.asl20;
     mainProgram = "Jan";
     maintainers = [ ];
-    platforms = with lib.systems.inspect; patternLogicalAnd patterns.isLinux patterns.isx86_64;
+    platforms =
+      lib.platforms.darwin
+      ++ (with lib.systems.inspect; patternLogicalAnd patterns.isLinux patterns.isx86_64);
   };
-}
+
+  linux = appimageTools.wrapType2 {
+    inherit pname version;
+    src = linux-src;
+
+    extraInstallCommands = ''
+      install -Dm444 ${appimageContents}/Jan.desktop -t $out/share/applications
+      cp -r ${appimageContents}/usr/share/icons $out/share
+    '';
+
+    extraPkgs =
+      pkgs:
+      lib.optionals cudaSupport [
+        cudaPackages.cudatoolkit
+      ];
+
+    inherit meta;
+  };
+
+  darwin = stdenv.mkDerivation {
+    inherit
+      pname
+      version
+      meta
+      ;
+
+    src = darwin-src;
+
+    dontUnpack = true;
+
+    sourceRoot = "${pname}.app";
+    nativeBuildInputs = [
+      makeWrapper
+    ];
+
+    installPhase = ''
+      runHook preInstall
+
+      mkdir -p $out/Applications/${pname}.app
+      mkdir -p $out/bin
+      cp -R $src/. $out/Applications/${pname}.app/
+      if [ -x "$out/Applications/${pname}.app/Contents/MacOS/${pname}" ]; then
+        makeWrapper "$out/Applications/${pname}.app/Contents/MacOS/${pname}" $out/bin/${pname}
+      fi
+
+      runHook postInstall
+    '';
+  };
+in
+if stdenv.hostPlatform.isDarwin then darwin else linux