[MacPorts] #40194: muniversal: pre-merge hook for each destroot

[MacPorts]

#40194: muniversal: pre-merge hook for each destroot
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  Reporter:  jeremyhu@…  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.2.0
Resolution:              |   Keywords:
      Port:              |
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Comment (by dluke@…):

 I agree that this would be useful. I recall doing something (ugly) in the
 clamav portfile for a similar issue, so there may be a way to work around
 it for now (I believe I copied the code from another port at the time).

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Ticket URL: <https://trac.macports.org/ticket/40194#comment:1>
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