option(
  NET_CPP_ENABLE_DOC_GENERATION
  "Generate package documentation with doxygen"
  ON
)

if (NET_CPP_ENABLE_DOC_GENERATION)

find_package(Doxygen)

if (DOXYGEN_FOUND)
  configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in 
    ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
  add_custom_target(doc ALL
    ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
    COMMENT "Generating API documentation with Doxygen" VERBATIM)
  install(
    DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html
    DESTINATION ${CMAKE_INSTALL_DOCDIR})

endif (DOXYGEN_FOUND)
endif (NET_CPP_ENABLE_DOC_GENERATION)