BUILD(cmake): Work around invalidly reported Qt translation directory

cmake/qt-utils.cmake

@@ -113,6 +113,35 @@ function(bundle_qt_translations TARGET)
 	query_qmake(QT_TRANSLATIONS_DIRECTORY "QT_INSTALL_TRANSLATIONS")
 	string(STRIP "${QT_TRANSLATIONS_DIRECTORY}" QT_TRANSLATIONS_DIRECTORY)
 
+	if (NOT EXISTS "${QT_TRANSLATIONS_DIRECTORY}" AND VCPKG_TARGET_TRIPLET)
+		message(STATUS "Trying to fix Qt translation directory...")
+
+		file(TO_NATIVE_PATH "/" path_separator)
+		file(TO_NATIVE_PATH "${QT_TRANSLATIONS_DIRECTORY}" QT_TRANSLATIONS_DIRECTORY)
+		string(REPLACE "${path_separator}" ";" PATH_COMPONENTS "${QT_TRANSLATIONS_DIRECTORY}")
+
+		set(PROCESSED_COMPONENTS "")
+
+		foreach (CURRENT_COMPONENT IN LISTS PATH_COMPONENTS)
+			message(STATUS "Current component '${CURRENT_COMPONENT}' vs. '${VCPKG_TARGET_TRIPLET}'?")
+			if ("${VCPKG_TARGET_TRIPLET}" MATCHES "^${CURRENT_COMPONENT}")
+				# In a vcpkg installation, it can happen that the path to the translation directory
+				# is reported to reside in the wrong triplet subdir. Hence, we try to rectify this
+				# by replacing the wrong triplet with the actual triplet that is being used.
+				# See https://github.com/microsoft/vcpkg/issues/40506
+				list(APPEND PROCESSED_COMPONENTS "${VCPKG_TARGET_TRIPLET}")
+			else()
+				list(APPEND PROCESSED_COMPONENTS "${CURRENT_COMPONENT}")
+			endif()
+		endforeach()
+
+		list(JOIN PROCESSED_COMPONENTS "${path_separator}" QT_TRANSLATIONS_DIRECTORY)
+	endif()
+
+	if (NOT EXISTS "${QT_TRANSLATIONS_DIRECTORY}")
+		message(FATAL_ERROR "Unable to determine Qt translation directory (determined path '${QT_TRANSLATIONS_DIRECTORY}' does not exist)")
+	endif()
+
 	message(STATUS "Bundling Qt translations from \"${QT_TRANSLATIONS_DIRECTORY}\"")
 
 	# Compile our version of Qt translations