[MacPorts] #53090: py-pyqt* multiple Qt depspecs

[MacPorts]

#53090: py-pyqt* multiple Qt depspecs
-------------------------+--------------------------------
 Reporter:  RJVB         |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  haspatch     |       Port:  py-pyqt4, py-pyqt5
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 As discussed on the ML, the py-pyqt* ports have multiple dependencies
 declared on the same Qt port(s), which is redundant.

 The attached patches fix this by including the Qt PortGroup only for the
 subports that actually need it. Since this is after including the Python
 PG, the depends_lib reset done by that PortGroup is no longer an issue
 either.

 Neither Qt PG redefines the configure mechanism (and the subports define
 their own anyway), so it's safe to include the Qt PortGroups last.

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Ticket URL: <https://trac.macports.org/ticket/53090>
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