Add icon extraction and desktop entry support

- Extract icons from AppImage and install to standard locations
- Create proper desktop entry with icon reference
- Fix version handling in wrapper script
- Update update script to verify icon extraction
- Now provides complete desktop integration with proper icon display

Resolves icon display issues in desktop environments.

flake.nix

@@ -12,10 +12,17 @@
       
       buildCursor = { version, url, sha256 }: 
         let
+          src = pkgs.fetchurl { inherit url sha256; };
+          
+          # Extract the AppImage to get access to the icon and desktop file
+          appimageContents = pkgs.appimageTools.extract {
+            inherit version src;
+            pname = "cursor";
+          };
+          
           unwrapped = pkgs.appimageTools.wrapType2 {
             pname = "cursor";
-            inherit version;
-            src = pkgs.fetchurl { inherit url sha256; };
+            inherit version src;
             
             extraPkgs = p: with p; [
               glib gtk3 cairo pango atk gdk-pixbuf
@@ -27,18 +34,73 @@
             ];
           };
         in
-        pkgs.writeShellScriptBin "cursor" ''
-          #!${pkgs.bash}/bin/bash
-          if [[ "$1" == "--version" || "$1" == "-v" ]]; then
+        pkgs.stdenv.mkDerivation {
+          pname = "cursor";
+          inherit version;
+          
+          nativeBuildInputs = [ pkgs.makeWrapper ];
+          
+          unpackPhase = "true";
+          
+          installPhase = ''
+            mkdir -p $out/bin $out/share/applications $out/share/icons/hicolor/scalable/apps $out/share/icons/hicolor/256x256/apps $out/share/pixmaps
+            
+            # Create version-aware wrapper script
+            cat > $out/bin/cursor << EOF
+            #!/usr/bin/env bash
+            if [[ "\$1" == "--version" || "\$1" == "-v" ]]; then
               echo "${version}"
               exit 0
             fi
             export CURSOR_DISABLE_UPDATE="1"
             export CURSOR_SKIP_UPDATE_CHECK="1"
-          export XDG_CACHE_HOME="$(mktemp -d -t cursor-xdg-cache-XXXXXX)"
-          export CURSOR_CACHE_DIR="$(mktemp -d -t cursor-cache-XXXXXX)"
-          exec "${unwrapped}/bin/cursor" "$@"
+            export XDG_CACHE_HOME="\$(mktemp -d -t cursor-xdg-cache-XXXXXX)"
+            export CURSOR_CACHE_DIR="\$(mktemp -d -t cursor-cache-XXXXXX)"
+            exec "${unwrapped}/bin/cursor" "\$@"
+            EOF
+            chmod +x $out/bin/cursor
+            
+            # Extract and install icon (try multiple possible locations and formats)
+            if [ -f "${appimageContents}/cursor.png" ]; then
+              cp "${appimageContents}/cursor.png" $out/share/pixmaps/cursor.png
+              cp "${appimageContents}/cursor.png" $out/share/icons/hicolor/256x256/apps/cursor.png
+            elif [ -f "${appimageContents}/Cursor.png" ]; then
+              cp "${appimageContents}/Cursor.png" $out/share/pixmaps/cursor.png
+              cp "${appimageContents}/Cursor.png" $out/share/icons/hicolor/256x256/apps/cursor.png
+            elif [ -f "${appimageContents}/usr/share/pixmaps/cursor.png" ]; then
+              cp "${appimageContents}/usr/share/pixmaps/cursor.png" $out/share/pixmaps/cursor.png
+              cp "${appimageContents}/usr/share/pixmaps/cursor.png" $out/share/icons/hicolor/256x256/apps/cursor.png
+            elif [ -f "${appimageContents}/usr/share/icons/hicolor/256x256/apps/cursor.png" ]; then
+              cp "${appimageContents}/usr/share/icons/hicolor/256x256/apps/cursor.png" $out/share/pixmaps/cursor.png
+              cp "${appimageContents}/usr/share/icons/hicolor/256x256/apps/cursor.png" $out/share/icons/hicolor/256x256/apps/cursor.png
+            fi
+            
+            # Try SVG icon as well
+            if [ -f "${appimageContents}/cursor.svg" ]; then
+              cp "${appimageContents}/cursor.svg" $out/share/icons/hicolor/scalable/apps/cursor.svg
+            elif [ -f "${appimageContents}/Cursor.svg" ]; then
+              cp "${appimageContents}/Cursor.svg" $out/share/icons/hicolor/scalable/apps/cursor.svg
+            elif [ -f "${appimageContents}/usr/share/icons/hicolor/scalable/apps/cursor.svg" ]; then
+              cp "${appimageContents}/usr/share/icons/hicolor/scalable/apps/cursor.svg" $out/share/icons/hicolor/scalable/apps/cursor.svg
+            fi
+            
+            # Create desktop entry
+            cat > $out/share/applications/cursor.desktop << EOF
+            [Desktop Entry]
+            Name=Cursor
+            Comment=AI-powered code editor
+            GenericName=Text Editor
+            Exec=$out/bin/cursor %F
+            Icon=cursor
+            Type=Application
+            StartupNotify=true
+            MimeType=text/plain;text/x-chdr;text/x-csrc;text/x-c++hdr;text/x-c++src;text/x-java;text/x-dsrc;text/x-pascal;text/x-perl;text/x-python;application/x-php;application/x-httpd-php3;application/x-httpd-php4;application/x-httpd-php5;application/javascript;application/json;text/x-markdown;text/x-web-markdown;text/html;text/css;text/x-sql;text/x-diff;
+            Categories=Development;IDE;
+            Keywords=editor;development;programming;ide;
+            StartupWMClass=Cursor
+            EOF
           '';
+        };
     in
     {
       packages.${system} = {

update-cursor.sh

@@ -104,6 +104,19 @@ if nix build .#cursor; then
         else
             print_warning "Version mismatch: expected $NEW_VERSION, got $BUILT_VERSION"
         fi
+        
+        # Check that icon and desktop entry were installed
+        if [[ -f "./result/share/pixmaps/cursor.png" ]]; then
+            print_success "Icon successfully extracted and installed!"
+        else
+            print_warning "Icon not found - might not display properly in desktop"
+        fi
+        
+        if [[ -f "./result/share/applications/cursor.desktop" ]]; then
+            print_success "Desktop entry created!"
+        else
+            print_warning "Desktop entry not found"
+        fi
     fi
 else
     print_error "Build failed!"