Add code to run notarytool and staple at end of install?

Code
1

I currently sign my macOS apps using macdeployqt:

if(NOT LINUX)
    set (deploy_tool_options_arg "-verbose=1")
    if(APPLE)
        set(deploy_tool_options_arg "${deploy_tool_options_arg} -hardened-runtime -timestamp -no-strip")
        set(deploy_tool_options_arg "${deploy_tool_options_arg} \"-executable=$<TARGET_BUNDLE_CONTENT_DIR:DeepSkyStacker>/MacOS/DeepSkyStackerCL\"")
        set(deploy_tool_options_arg "${deploy_tool_options_arg} \"-executable=$<TARGET_BUNDLE_CONTENT_DIR:DeepSkyStacker>/MacOS/uchmviewer\"")
        set(deploy_tool_options_arg "${deploy_tool_options_arg} \"-codesign=Developer ID Application: David Partridge (VH8AYT3C7Y)\"")
    elseif(WIN32)
        set(deploy_tool_options_arg "${deploy_tool_options_arg} --compiler-runtime --pdb")
        set(deploy_tool_options_arg "${deploy_tool_options_arg} --dir . --plugindir plugins")
    endif()

    # Generate a deployment script to be executed at install time
    # App bundles on macOS have an .app suffix
    if(APPLE)
        set(executable_path "${CMAKE_CURRENT_BINARY_DIR}/$<TARGET_FILE_NAME:DeepSkyStacker>.app")
    else()
        message ("Target filename:"  $<TARGET_FILE_NAME:DeepSkyStacker>)
        set(executable_path "${CMAKE_CURRENT_BINARY_DIR}/$<TARGET_FILE_NAME:DeepSkyStacker>")
    endif()

    message ("executable_path: " ${executable_path})
    message ("deploy tools options arg: " ${deploy_tool_options_arg})
     qt_generate_deploy_script(
         TARGET DeepSkyStacker
         OUTPUT_SCRIPT deploy_script
         CONTENT "
     qt_deploy_runtime_dependencies(
         EXECUTABLE \"${executable_path}\"
         DEPLOY_TOOL_OPTIONS ${deploy_tool_options_arg}
     )"
     )
else()
    qt_generate_deploy_app_script(
        TARGET ${PROJECT_NAME}
        OUTPUT_SCRIPT deploy_script
        DEPLOY_TOOL_OPTIONS ${deploy_tool_options_arg}
    )
endif()
install (SCRIPT ${deploy_script})
install(TARGETS ${PROJECT_NAME} BUNDLE DESTINATION .)

but that still leaves the essential steps of running notarytool and staple to create a distributable app.

How best to incorporate code to achieve that please?

Thanks
David