function(_NoniusSource_import)
  if(NOT DOWNLOAD_NONIUS)
    set(NoniusSource_FOUND FALSE PARENT_SCOPE)
    return()
  endif(NOT DOWNLOAD_NONIUS)

  nnfw_include(ExternalSourceTools)
  nnfw_include(OptionTools)

  envoption(EXTERNAL_DOWNLOAD_SERVER "https://github.com")
  set(NONIUS_URL ${EXTERNAL_DOWNLOAD_SERVER}/libnonius/nonius/archive/v1.2.0-beta.1.tar.gz)
  ExternalSource_Download("nonius" ${NONIUS_URL})

  set(NoniusSource_DIR ${nonius_SOURCE_DIR} PARENT_SCOPE)
  set(NoniusSource_FOUND TRUE PARENT_SCOPE)
endfunction(_NoniusSource_import)

_NoniusSource_import()