[MacPorts] #37655: bob: use PortGroup active_variants

[MacPorts]

#37655: bob: use PortGroup active_variants
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  Reporter:  ciserlohn@…  |      Owner:  laurent.el-shafey@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.1.2
Resolution:               |   Keywords:  haspatch
      Port:  bob          |
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Comment (by laurent.el-shafey@…):

 Thanks for your comment AND for providing the patch. I've just test it and
 it works well for me.
 @Andre, as you originally wrote this piece of code, could you please
 confirm?

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Ticket URL: <https://trac.macports.org/ticket/37655#comment:2>
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