[ET Trac] [Einstein Toolkit] #1532: The ET should handle "optional" thorns (OpenCL ect) in a better way.

[Einstein Toolkit]

#1532: The ET should handle "optional" thorns (OpenCL ect) in a better way.
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  Reporter:  rhaas        |       Owner:  eschnett           
      Type:  enhancement  |      Status:  reopened           
  Priority:  minor        |   Milestone:                     
 Component:  Cactus       |     Version:  development version
Resolution:               |    Keywords:                     
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Comment (by knarf):

 In todays call a workaround was discussed: putting optional thorns
 "commented" into the thornlist, analogous to some documentation
 repositories right now - and to use the enabled-thorns mechanism in
 simfactory. This would have everyone checkout all thorns, but Cactus would
 not build all by default. Simfactory can then, on a machine-basis enable
 thorns.

 The downside would be (and we would need to discuss this), that this only
 works well for a complete ET checkout. Any other application using
 simfactory would will fail, because it might not contain all the optional
 thorns listed (still as required for some machine). The simplest case is
 an empty thornlist, no thorns checked out. This should only compile the
 flesh, and should probably always work. It wouldn't with this mechanism.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1532#comment:4>
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