[MacPorts] #51996: Buildbot: create a new factory to aid with new MacPort releases

[MacPorts]

#51996: Buildbot: create a new factory to aid with new MacPort releases
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  Reporter:  mojca          |      Owner:  admin@…
      Type:  enhancement    |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:  buildbot
      Port:                 |
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Comment (by neverpanic):

 See #56055 for a dependency task to provide 'dmg' and 'pkg' targets in the
 base build system.

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Ticket URL: <https://trac.macports.org/ticket/51996#comment:7>
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