find_package(Doxygen)
if(NOT DOXYGEN_FOUND)
	message(FATAL_ERROR "Doxygen is needed to build the documentation.")
endif()

set(doxyfile_in ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
set(doxyfile ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

configure_file(${doxyfile_in} ${doxyfile} @ONLY)

add_custom_target(doc
	COMMAND ${DOXYGEN_EXECUTABLE} ${doxyfile}
	WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
	COMMENT "Generating API documentation with Doxygen"
	VERBATIM
)

install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html DESTINATION doc)
