[MacPorts] #52989: buildbot: allow building 'pseudoports'

[MacPorts]

#52989: buildbot: allow building 'pseudoports'
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  Reporter:  mojca           |      Owner:  admin@…
      Type:  enhancement     |     Status:  new
  Priority:  Low             |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:  buildbot
      Port:                  |
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Comment (by mojca):

 And yes, I wouldn't mind support for arbitrary expressions. It doesn't
 seem to be any more difficult to support (as shown in the above example).

 The only thing that we need to make sure is not to make it too easy to
 ''accidentally'' end up with too many ports being built.

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Ticket URL: <https://trac.macports.org/ticket/52989#comment:7>
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