#=======================================================================================================================
# Preamble
#=======================================================================================================================
cmake_minimum_required(VERSION 3.15 FATAL_ERROR)
project(OpenXLSX.Documentation)

#=======================================================================================================================
# Set up Doxygen API documentation
#=======================================================================================================================
# check if Doxygen is installed
find_package(Doxygen)
if (DOXYGEN_FOUND)
    # set input and output files
    set(DOXYGEN_IN ${CMAKE_CURRENT_LIST_DIR}/Doxyfile.in)
    set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
    set(DOXYGEN_SOURCE ${CMAKE_CURRENT_LIST_DIR}/../OpenXLSX/headers)
    set(DOXYGEN_QUIET YES)

    # request to configure the file
    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT})# @ONLY)
    message("Doxygen build started")

    # note the option ALL which allows to build the docs together with the application
    add_custom_target(Documentation
                      COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
                      WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
                      COMMENT "Generating API documentation with Doxygen"
                      VERBATIM)
else (DOXYGEN_FOUND)
    message("Doxygen need to be installed to generate the doxygen documentation")
endif (DOXYGEN_FOUND)