CMakeLists.txt

file(DOWNLOAD https://raw.githubusercontent.com/jothepro/doxygen-awesome-css/v2.2.1/doxygen-awesome.css
     ${CMAKE_CURRENT_LIST_DIR}/doxygen-awesome.css
     EXPECTED_HASH SHA256=9b5549928906e9974cc12dcdde9265e016dc2388ec72d5aa3209f4870914a0c8)
file(DOWNLOAD https://raw.githubusercontent.com/jothepro/doxygen-awesome-css/v2.2.1/doxygen-awesome-sidebar-only.css
     ${CMAKE_CURRENT_LIST_DIR}/doxygen-awesome-sidebar-only.css
     EXPECTED_HASH SHA256=998328b27193b7be007a431bc9be1a6f6855ff4d8fa722ecfdfed79a8931409f)

execute_process(COMMAND doxygen --version RESULT_VARIABLE DOXYGEN_VERSION_RESULT
                OUTPUT_VARIABLE DOXYGEN_VERSION_RAW_OUTPUT)
if(NOT DOXYGEN_VERSION_RESULT EQUAL 0)
  message(AUTHOR_WARNING "Unable to get the version of doxygen")
else()
  # Extracts the version from the output of the command run before
  string(REGEX MATCH "^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)" DOXYGEN_VERSION_OUTPUT
               "${DOXYGEN_VERSION_RAW_OUTPUT}")
  message(STATUS "doxygen version detected : ${DOXYGEN_VERSION_OUTPUT}")
endif()

add_custom_target(jwt-docs COMMAND doxygen ${CMAKE_CURRENT_LIST_DIR}/Doxyfile WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
                  SOURCES ${CMAKE_CURRENT_LIST_DIR}/Doxyfile BYPRODUCTS ${CMAKE_BINARY_DIR}/html/index.html)
add_custom_command(
  TARGET jwt-docs POST_BUILD COMMAND ${CMAKE_COMMAND} -E cmake_echo_color --cyan
                                     "You can prview the documentation: ${CMAKE_BINARY_DIR}/html/index.html")