CI: use ITK doxygen tag for doxygen

CI/ubuntu-18.04-llvm-shark.cmake

@@ -39,6 +39,15 @@ endif()
 if(NOT ${ci_do_doxygen} EQUAL -1)
   set(site_option
 "${site_option}
-BUILD_DOCUMENTATION:BOOL=ON")
+BUILD_DOCUMENTATION:BOOL=ON
+OTB_DOXYGEN_ITK_TAGFILE:FILEPATH=${CTEST_BINARY_DIRECTORY}/InsightDoxygenDocTag-4.13.0
+OTB_DOXYGEN_ITK_DOXYGEN_URL:STRING=\"https://itk.org/Doxygen413/html\"
+")
   set (ENABLE_DOXYGEN ON)
+  # The ITK doxygen tag file needs to be patched before being used for OTB
+  # See otb-devutils/Scripts/tagfile_fix.py
+  message(STATUS "Get resources for Doxygen build ...")
+  execute_process(COMMAND wget https://www.orfeo-toolbox.org/packages/archives/Doxygen/InsightDoxygenDocTag-4.13.0.gz
+                  COMMAND gzip -d InsightDoxygenDocTag-4.13.0.gz
+                  WORKING_DIRECTORY ${CTEST_BINARY_DIRECTORY})
 endif()