WIP: auto update

deps/WinSparkle/WinSparkle.cmake

@@ -0,0 +1,33 @@
+# WinSparkle - Auto-update framework for Windows
+# https://winsparkle.org/
+# https://github.com/vslavik/winsparkle
+#
+# WinSparkle is distributed as pre-built binaries, so we just download and extract.
+
+if(WIN32)
+    set(WINSPARKLE_VERSION "0.8.3")
+
+    # Determine architecture
+    if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+        set(WINSPARKLE_ARCH "x64")
+    else()
+        set(WINSPARKLE_ARCH "x86")
+    endif()
+
+    ExternalProject_Add(
+        dep_WinSparkle
+        EXCLUDE_FROM_ALL ON
+        URL "https://github.com/vslavik/winsparkle/releases/download/v${WINSPARKLE_VERSION}/WinSparkle-${WINSPARKLE_VERSION}.zip"
+        URL_HASH SHA256=5ff4a4604c78d57e01d83e22f79f5ffea0c4969defd48b45c69ccbd6b1a71e94
+        DOWNLOAD_DIR ${DEP_DOWNLOAD_DIR}/WinSparkle
+        # No build step needed - just install pre-built binaries
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ""
+        INSTALL_COMMAND ${CMAKE_COMMAND} -E copy_directory
+            <SOURCE_DIR>/include ${DESTDIR}/include
+        COMMAND ${CMAKE_COMMAND} -E copy
+            <SOURCE_DIR>/${WINSPARKLE_ARCH}/Release/WinSparkle.dll ${DESTDIR}/bin/WinSparkle.dll
+        COMMAND ${CMAKE_COMMAND} -E copy
+            <SOURCE_DIR>/${WINSPARKLE_ARCH}/Release/WinSparkle.lib ${DESTDIR}/lib/WinSparkle.lib
+    )
+endif()