[libxml2] cmake: Remove non needed files in docs dir

[Nick Wellnhofer <nwellnhof src gnome org>]

commit f2987a295ff847ecb2a6a3eae1a271c9a64255b6
Author: Daniel E <daniel engberg lists pyret net>
Date:   Sun Apr 3 18:49:19 2022 +0000

    cmake: Remove non needed files in docs dir
    
    Don't install files that are used to generate the documentation

 CMakeLists.txt | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a9c8177..68419a09 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -597,7 +597,13 @@ endif()
 install(FILES doc/xml2-config.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1 COMPONENT documentation)
 install(FILES doc/xmlcatalog.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1 COMPONENT documentation)
 install(FILES doc/xmllint.1 DESTINATION ${CMAKE_INSTALL_MANDIR}/man1 COMPONENT documentation)
-install(DIRECTORY doc/ DESTINATION ${CMAKE_INSTALL_DATADIR}/doc/libxml2 COMPONENT documentation PATTERN 
Makefile.* EXCLUDE)
+install(DIRECTORY doc/ DESTINATION ${CMAKE_INSTALL_DATADIR}/doc/libxml2 COMPONENT documentation
+       PATTERN "Makefile.*" EXCLUDE
+       PATTERN "*.xsl" EXCLUDE
+       PATTERN "*.py" EXCLUDE
+       PATTERN "*.xml" EXCLUDE
+       PATTERN "examples/*" EXCLUDE)
+install(DIRECTORY doc/examples/ DESTINATION ${CMAKE_INSTALL_DATADIR}/doc/libxml2/examples COMPONENT 
documentation PATTERN "Makefile.*" EXCLUDE)
 
 configure_package_config_file(
        libxml2-config.cmake.cmake.in libxml2-config.cmake