marktext: 0.16.2 -> 0.16.3

Add .desktop file, icons in the process.

pkgs/applications/misc/marktext/default.nix

@@ -2,16 +2,21 @@
 
 let
   pname = "marktext";
-  version = "v0.16.2";
-in
-appimageTools.wrapType2 rec {
+  version = "v0.16.3";
   name = "${pname}-${version}-binary";
 
   src = fetchurl {
     url = "https://github.com/marktext/marktext/releases/download/${version}/marktext-x86_64.AppImage";
-    sha256 = "0ivf9lvv2jk7dvxmqprzcsxgya3617xmx5bppjvik44z14b5x8r7";
+    sha256 = "0s93c79vy2vsi7b6xq4hvsvjjad8bdkhl1q135vp98zmbf7bvm9b";
   };
 
+  appimageContents = appimageTools.extractType2 {
+    inherit name src;
+  };
+in
+appimageTools.wrapType2 rec {
+  inherit name src;
+
   profile = ''
     export LC_ALL=C.UTF-8
   ''
@@ -28,8 +33,16 @@ appimageTools.wrapType2 rec {
     p.xorg.libxkbfile
   ];
 
-  # Strip version from binary name.
-  extraInstallCommands = "mv $out/bin/${name} $out/bin/${pname}";
+  extraInstallCommands = ''
+    # Strip version from binary name.
+    mv $out/bin/${name} $out/bin/${pname}
+
+    install -m 444 -D ${appimageContents}/marktext.desktop $out/share/applications/marktext.desktop
+    substituteInPlace $out/share/applications/marktext.desktop \
+      --replace "Exec=AppRun" "Exec=${pname} --"
+
+    cp -r ${appimageContents}/usr/share/icons $out/share
+  '';
 
   meta = with lib; {
     description = "A simple and elegant markdown editor, available for Linux, macOS and Windows";