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# Generate the license file for the target ${param} at config time

function(mbgl_generate_license param)
    # Fake targets or non relevant.
    set(BLACKLIST "mbgl-compiler-options")

    get_target_property(LIBRARIES ${param} LINK_LIBRARIES)
    list(INSERT LIBRARIES 0 ${param})

    # cmake-format: off
    foreach(LIBRARY IN LISTS LIBRARIES)
    # cmake-format: on
        if(${LIBRARY} IN_LIST BLACKLIST)
            continue()
        endif()

        if(TARGET ${LIBRARY})
            get_target_property(NAME ${LIBRARY} INTERFACE_MAPBOX_NAME)
            get_target_property(URL ${LIBRARY} INTERFACE_MAPBOX_URL)
            get_target_property(AUTHOR ${LIBRARY} INTERFACE_MAPBOX_AUTHOR)
            get_target_property(LICENSE ${LIBRARY} INTERFACE_MAPBOX_LICENSE)

            if(NOT LICENSE OR NOT EXISTS ${LICENSE})
                message(FATAL_ERROR "License not found for target: ${LIBRARY}")
            endif()

            file(READ ${LICENSE} LICENSE_DATA)

            string(APPEND LICENSE_LIST "### [${NAME}](${URL}) by ${AUTHOR}\n\n")
            string(APPEND LICENSE_LIST "```\n${LICENSE_DATA}\n```\n\n")
            string(APPEND LICENSE_LIST "---\n\n")
        endif()
    endforeach()

    file(WRITE ${CMAKE_BINARY_DIR}/${param}.license ${LICENSE_LIST})

    add_custom_target(${param}-license COMMAND cat ${CMAKE_BINARY_DIR}/${param}.license)
endfunction()

mbgl_generate_license(mbgl-core)