cmake_minimum_required (VERSION 3.26)
project (HDF5_DOXYGEN C)

#-----------------------------------------------------------------------------
# Option to build documentation
#-----------------------------------------------------------------------------
string (TIMESTAMP HDF5_PACKAGE_DATE_STRING "%Y-%m-%d")
if (DOXYGEN_FOUND)
  set (DOXYGEN_PACKAGE ${HDF5_PACKAGE_NAME})
  # For release builds use the version from the package
  # set (DOXYGEN_VERSION_STRING ${HDF5_PACKAGE_VERSION_STRING})
  set (DOXYGEN_VERSION_STRING "Last Updated on ${HDF5_PACKAGE_DATE_STRING}")
  set (DOXYGEN_DIR ${HDF5_DOXYGEN_DIR})
  set (DOXYGEN_INCLUDE_ALIASES_PATH ${HDF5_DOXYGEN_DIR})
  set (DOXYGEN_INCLUDE_ALIASES aliases)
  set (DOXYGEN_VERBATIM_VARS DOXYGEN_INCLUDE_ALIASES)
  set (DOXYGEN_PROJECT_LOGO ${HDF5_DOXYGEN_DIR}/img/HDFG-logo.png)
  set (DOXYGEN_PROJECT_BRIEF "The HDF5 Field Guide")
  set (DOXYGEN_INPUT_DIRECTORY "${HDF5_SOURCE_DIR} ${HDF5_DOXYGEN_DIR}/dox ${HDF5_GENERATED_SOURCE_DIR}")
  set (DOXYGEN_OPTIMIZE_OUTPUT_FOR_C YES)
  set (DOXYGEN_MACRO_EXPANSION YES)
  set (DOXYGEN_OUTPUT_DIRECTORY ${HDF5_BINARY_DIR}/hdf5lib_docs)
  set (DOXYGEN_EXAMPLES_DIRECTORY "${HDF5_DOXYGEN_DIR}/dox/cookbook ${HDF5_DOXYGEN_DIR}/examples ${HDF5_SRC_DIR} ${HDF5_SOURCE_DIR}/release_docs ${HDF5_TEST_SRC_DIR}")
  set (DOXYGEN_LAYOUT_FILE ${HDF5_DOXYGEN_DIR}/hdf5doxy_layout.xml)
  set (DOXYGEN_HTML_HEADER ${HDF5_DOXYGEN_DIR}/hdf5_header.html)
  set (DOXYGEN_HTML_FOOTER ${HDF5_DOXYGEN_DIR}/hdf5_footer.html)
  set (DOXYGEN_HTML_EXTRA_STYLESHEET "${HDF5_DOXYGEN_DIR}/hdf5doxy.css ${HDF5_DOXYGEN_DIR}/doxygen-awesome.css")
  set (DOXYGEN_HTML_EXTRA_FILES "${HDF5_DOXYGEN_DIR}/hdf5_navtree_hacks.js ${HDF5_DOXYGEN_DIR}/doxygen-awesome-tabs.js")
  set (DOXYGEN_TAG_FILE ${HDF5_BINARY_DIR}/hdf5.tag)
  set (DOXYGEN_SERVER_BASED_SEARCH NO)
  set (DOXYGEN_EXTERNAL_SEARCH NO)
  set (DOXYGEN_SEARCHENGINE_URL)
  set (DOXYGEN_STRIP_FROM_PATH ${HDF5_SOURCE_DIR})
  set (DOXYGEN_STRIP_FROM_INC_PATH ${HDF5_SOURCE_DIR})
  # Versioned API macros are added to PREDEFINED to give Doxygen a fixed
  # expansion and prevent it from discovering the #defines in H5version.h,
  # which otherwise causes "multiple @param documentation sections" warnings
  # when the macro documentation (\def) and the function documentation both
  # get associated with the same underlying function.
  #
  # The versioned API macros are auto-generated from src/H5vers.txt by the
  # bin/make_vers script, which creates doxygen/H5version_doxygen.cmake.
  # This ensures the Doxygen configuration stays synchronized with the
  # actual default versions defined in src/H5version.h.
  set (_doxygen_predefined_entries
    H5_HAVE_DIRECT
    H5_HAVE_LIBHDFS
    H5_HAVE_MAP_API
    H5_HAVE_PARALLEL
    H5_HAVE_ROS3_VFD
    H5_DOXYGEN
    H5_HAVE_SUBFILING_VFD
    H5_HAVE_IOC_VFD
    H5_HAVE_MIRROR_VFD
    "H5std_string=std::string"
    "H5G_link_t=H5L_type_t"
  )
  # Load auto-generated versioned API macros from doxygen/H5version_doxygen.cmake
  include(${HDF5_DOXYGEN_DIR}/H5version_doxygen.cmake)
  list (JOIN _doxygen_predefined_entries " " DOXYGEN_PREDEFINED)
  set (DOXYGEN_WARN_AS_ERROR ${HDF5_DOXY_WARNINGS})

# This configure and individual custom targets work together
  # Replace variables inside @@ with the current values
  configure_file (${HDF5_DOXYGEN_DIR}/Doxyfile.in ${HDF5_BINARY_DIR}/Doxyfile @ONLY)

  install (
      DIRECTORY ${HDF5_BINARY_DIR}/hdf5lib_docs/html
      DESTINATION ${HDF5_INSTALL_DOC_DIR}
      COMPONENT hdfdocuments
  )
  install (
      FILES ${HDF5_BINARY_DIR}/hdf5.tag
      DESTINATION ${HDF5_INSTALL_DOC_DIR}
      COMPONENT hdfdocuments
  )

  if (NOT TARGET doxygen)
    add_custom_target (doxygen)
  endif ()

endif ()