add_to_gnome.sh

#!/bin/bash

# Define paths for Fedora 43 desktop and icon standards
APPS_DIR="$HOME/.local/share/applications"
ICON_DIR="$HOME/.local/share/icons/appimages"
mkdir -p "$APPS_DIR" "$ICON_DIR"

for app_file in *.AppImage *.appimage; do
    [ -e "$app_file" ] || continue
    chmod +x "$app_file"
    FULL_PATH=$(realpath "$app_file")
    APP_BASE=$(basename "$app_file" .AppImage)
    APP_BASE=$(basename "$APP_BASE" .appimage)
    FINAL_DESKTOP="$APPS_DIR/SCRIPT_${APP_BASE,,}.desktop"

    if [[ -f "$FINAL_DESKTOP" ]]; then
        echo "Skipping: '$APP_BASE' already integrated."
        continue
    fi

    echo "Processing $APP_BASE..."

    # 1. Extract internal metadata
    ./"$app_file" --appimage-extract > /dev/null 2>&1
    
    # 2. Extract and move the correct icon
    TARGET_ICON="$ICON_DIR/${APP_BASE,,}.png"
    if [ -L "squashfs-root/.DirIcon" ]; then
        # .DirIcon is a symlink, copy the actual file it points to
        cp -L "squashfs-root/.DirIcon" "$TARGET_ICON"
    elif [ -f "squashfs-root/.DirIcon" ]; then
        # .DirIcon is a regular file, move it
        mv "squashfs-root/.DirIcon" "$TARGET_ICON"
    fi

    # 3. Find and modify the internal desktop file
    INTERNAL_DESKTOP=$(find squashfs-root -name "*.desktop" | head -n 1)
    
    if [ -f "$INTERNAL_DESKTOP" ]; then
        # Copy the internal file but fix the Exec and Icon paths
        grep -vE "^(Exec|Icon|TryExec)=" "$INTERNAL_DESKTOP" > "$FINAL_DESKTOP"
        echo "Exec=$FULL_PATH" >> "$FINAL_DESKTOP"
        echo "Icon=$TARGET_ICON" >> "$FINAL_DESKTOP"
        echo "Comment=Integrated AppImage" >> "$FINAL_DESKTOP"
        
        # Ensure StartupWMClass exists; if not, use the internal Name
        if ! grep -q "StartupWMClass" "$FINAL_DESKTOP"; then
            WM_CLASS=$(grep "^Name=" "$FINAL_DESKTOP" | head -n 1 | cut -d'=' -f2)
            echo "StartupWMClass=$WM_CLASS" >> "$FINAL_DESKTOP"
        fi
    else
        # Fallback if no internal desktop file is found
        cat <<EOF > "$FINAL_DESKTOP"
[Desktop Entry]
Type=Application
Name=$APP_BASE
Exec=$FULL_PATH
Icon=utilities-terminal
StartupWMClass=$APP_BASE
EOF
    fi

    # Cleanup
    rm -rf squashfs-root
    echo "Successfully integrated: $APP_BASE"
done

update-desktop-database "$APPS_DIR"

Add appimages to fedora (and possibly other linux distribution) menu