# Forbid downloading resources from the network during a build. This helps
# when building on systems without network connectivity to determine which
# resources much be obtained manually and made available to the build.
option(VTK_FORBID_DOWNLOADS "Do not download source code or data from the network" OFF)
mark_as_advanced(VTK_FORBID_DOWNLOADS)
macro(vtk_download_attempt_check _name)
if(VTK_FORBID_DOWNLOADS)
message(SEND_ERROR "Attempted to download ${_name} when VTK_FORBID_DOWNLOADS is ON")
endif()
endmacro()
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