[MacPorts] #39294: RFE: new port (developer) action: `port preprocess` (for PortGroups)

[MacPorts]

#39294: RFE: new port (developer) action: `port preprocess` (for PortGroups)
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  Reporter:  egall@…      |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.1.3
Resolution:               |   Keywords:
      Port:               |
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Comment (by ryandesign@…):

 How would this hypothetical command show you what it looks like?

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Ticket URL: <https://trac.macports.org/ticket/39294#comment:1>
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