[MacPorts] #58696: Don't force the buildbot to build from source

[MacPorts]

#58696: Don't force the buildbot to build from source
----------------------------+---------------------
  Reporter:  ryandesign     |      Owner:  admin@…
      Type:  defect         |     Status:  new
  Priority:  High           |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
----------------------------+---------------------

Comment (by ryandesign):

 Replying to [comment:8 mojca]:
 > We probably made sure that if a build is started, stuff gets built from
 source (else we didn't spot any problems with Travis/Azure).

 I know that that is why the change was made. But it wastes CPU time on the
 buildbot.

 > And you mentioned at some point that you want to run the builds in
 certain cases, for example when distributability changes, to ensure that
 something gets uploaded to the mirror.

 Forcing it to build from source again is not necessary to accomplish that.
 Allowing it to use the existing binary would be fine.

-- 
Ticket URL: <https://trac.macports.org/ticket/58696#comment:11>
MacPorts <https://www.macports.org/>
Ports system for macOS