[MacPorts] #61810: certbot and subports set dependencies incorrectly with most variants

[MacPorts]

#61810: certbot and subports set dependencies incorrectly with most variants
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  Reporter:  jmroot   |      Owner:  Schamschula
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  certbot  |
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Comment (by Schamschula):

 Indeed! Until 3.9 came out recently,  I was always building against the
 default version.

 Setting the dependencies inside the variants is very clumsy: lots of
 redundant code. There must be a more elegant way to do this.

 This makes Python app ports a pain as compared to Python libraries.

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Ticket URL: <https://trac.macports.org/ticket/61810#comment:8>
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