[ET Trac] [Einstein Toolkit] #620: Simplify timelevel handling for Cactus thorn writers

[Einstein Toolkit]

#620: Simplify timelevel handling for Cactus thorn writers
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  Reporter:  hinder       |       Owner:          
      Type:  enhancement  |      Status:  reopened
  Priority:  major        |   Milestone:          
 Component:  Cactus       |     Version:          
Resolution:               |    Keywords:          
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Comment (by eschnett):

 The current mechanism for a thorn indicating that it needs time levels is
 to call cctk_GroupStorageIncrease, as this would allocate new time levels
 if necessary. This call will never reduce the number of time levels.

 These calls need to occur late enough, so that the GH already exists and
 grid functions can have storage allocated, but also needs to occur early
 enough that initial data can still be set up. I believe basegrid would be
 a good time.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/620#comment:8>
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