[MacPorts] #38720: Add a port for bup (https://github.com/bup/bup)

[MacPorts]

#38720: Add a port for bup (https://github.com/bup/bup)
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  Reporter:  mail@…   |      Owner:  macports-tickets@…
      Type:  request  |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:
      Port:  bup      |
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Comment (by ryandesign@…):

 There is http://guide.macports.org/chunked/development.html

 Since this is on github, perhaps using the github portgroup would help. It
 is not documented in the guide however; look for other ports using it as
 an example, and/or read the source code of the portgroup file itself.

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Ticket URL: <https://trac.macports.org/ticket/38720#comment:2>
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