[MacPorts] #55078: buildbot: exit early in portbuilder if port already built

[MacPorts]

#55078: buildbot: exit early in portbuilder if port already built
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  Reporter:  ryandesign      |      Owner:  admin@…
      Type:  enhancement     |     Status:  new
  Priority:  Low             |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:  buildbot
      Port:                  |
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Changes (by neverpanic):

 * priority:  Normal => Low


Comment:

 This will be a much less important issue if we fix #52766.

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Ticket URL: <https://trac.macports.org/ticket/55078#comment:1>
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