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include(ExternalData)
set(ExternalData_URL_TEMPLATES
"file:///${CMAKE_CURRENT_SOURCE_DIR}/%(algo)/%(hash)"
)
set(ExternalData_BINARY_ROOT ${CMAKE_CURRENT_BINARY_DIR}/ExternalData)
set(input Data.txt)
set(output ${CMAKE_CURRENT_BINARY_DIR}/ExternalData/Data.txt)
ExternalData_Expand_Arguments(Data args DATA{${input}})
if("x${args}" STREQUAL "x${output}")
message(STATUS "Data reference correctly transformed!")
else()
message(FATAL_ERROR "Data reference transformed to:\n ${args}\n"
"but we expected:\n ${output}")
endif()
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