# Doxygen documentation
# ======================

# add a target to generate API documentation with Doxygen
find_package(Doxygen)

if(DOXYGEN_FOUND)
    # these variables are used in the configuration of the Doxyfile.in
    set (SPECMICP_SRC_DIR ${PROJECT_SOURCE_DIR}/src)
    set (SPECMICP_DOC_DIR ${CMAKE_CURRENT_SOURCE_DIR})

    set (DOC_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})

    # Configure doxygen
    configure_file(Doxyfile.in ${DOC_BINARY_DIR}/Doxyfile @ONLY)
    # Citations for the documentations
    add_custom_target(citations SOURCES citations.bib)
    file(INSTALL citations.bib
         DESTINATION ${DOC_BINARY_DIR})
    # Target to build the documentations
    add_custom_target(doc_html
        ${DOXYGEN_EXECUTABLE} ${DOC_BINARY_DIR}/Doxyfile
        WORKING_DIRECTORY ${DOC_BINARY_DIR}
        COMMENT "Generating API documentation with Doxygen" VERBATIM
    )
    install(DIRECTORY ${DOC_BINARY_DIR}/html
        DESTINATION ${SHARE_INSTALL_DIR}
        OPTIONAL
    )
else()
message(STATUS "Doxygen is not found, the documentation cannot be build")
endif(DOXYGEN_FOUND)