shiboken2: Enable documentation generation with libxml2/libxslt

As QtXmlPatterns is deprecated in Qt 5.14, the documentation build
needs to be changed to work with libxml2/libxslt exclusively.

Split the XML functionality into separate files for libxslt and Qt and
provide an interface for XPATH queries and XSLT transformations in
xmlutils.h.

Adapt testmodifydocumentation to work on temporary files as libxslt
cannot handle Qt resources.

Change-Id: I923f5b2e7c1d2511f15788e4b80c7721daeb2bc3
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>

1 files changed, 17 insertions, 9 deletions

diff --git a/sources/shiboken2/ApiExtractor/CMakeLists.txt b/sources/shiboken2/ApiExtractor/CMakeLists.txt
index 147fda377..760cc6985 100644
--- a/sources/shiboken2/ApiExtractor/CMakeLists.txt
+++ b/sources/shiboken2/ApiExtractor/CMakeLists.txt
@@ -26,6 +26,7 @@ clangparser/clangutils.cpp
 # Old parser
 parser/codemodel.cpp
 parser/enumvalue.cpp
+xmlutils.cpp
 )
 
 add_library(apiextractor STATIC ${apiextractor_SRC})
@@ -37,19 +38,26 @@ target_include_directories(apiextractor PRIVATE ${CLANG_EXTRA_INCLUDES}
 target_link_libraries(apiextractor PUBLIC Qt5::Core)
 target_link_libraries(apiextractor PRIVATE ${CLANG_EXTRA_LIBRARIES})
 
+if (HAS_LIBXSLT)
+    target_compile_definitions(apiextractor PUBLIC HAVE_LIBXSLT)
+    target_sources(apiextractor PRIVATE xmlutils_libxslt.cpp)
+    target_include_directories(apiextractor
+                               PRIVATE ${LIBXSLT_INCLUDE_DIR} ${LIBXML2_INCLUDE_DIR})
+    target_link_libraries(apiextractor
+                          PRIVATE ${LIBXSLT_LIBRARIES} ${LIBXML2_LIBRARIES})
+endif()
+
+if (Qt5XmlPatterns_FOUND)
+    target_compile_definitions(apiextractor PUBLIC HAVE_QTXMLPATTERNS)
+    target_sources(apiextractor PRIVATE xmlutils_qt.cpp)
+    target_link_libraries(apiextractor PUBLIC Qt5::Xml Qt5::XmlPatterns)
+endif()
+
 if (NOT DISABLE_DOCSTRINGS)
     target_sources(apiextractor PRIVATE docparser.cpp
                                         doxygenparser.cpp
                                         qtdocparser.cpp)
-    target_link_libraries(apiextractor PUBLIC Qt5::Xml Qt5::XmlPatterns)
-
-    if (LIBXSLT_FOUND AND LIBXML2_FOUND)
-        target_compile_definitions(apiextractor PUBLIC HAVE_LIBXSLT)
-        target_include_directories(apiextractor
-                                   PRIVATE ${LIBXSLT_INCLUDE_DIR} ${LIBXML2_INCLUDE_DIR})
-        target_link_libraries(apiextractor
-                              PRIVATE ${LIBXSLT_LIBRARIES} ${LIBXML2_LIBRARIES})
-    else()
+    if (NOT HAS_LIBXSLT)
         message(WARNING
                 "libxslt and/or libxml not found, falling back to QtXmlPatterns (QTBUG-66925)")
     endif()