[MacPorts] #58800: Buildbot should wait until the clock catches up to the Portfiles

[MacPorts]

#58800: Buildbot should wait until the clock catches up to the Portfiles
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  Reporter:  ryandesign     |      Owner:  admin@…
      Type:  enhancement    |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by jmroot):

 AFAICT macOS doesn't actually run ntpd, which would be why the clock drift
 happens in the first place. Pre-Mojave you could run ntpdate to do a one-
 off sync, but that's gone in the latest ntp, with better alternatives now
 existing:
 https://support.ntp.org/bin/view/Dev/DeprecatingNtpdate#Functionality_List

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Ticket URL: <https://trac.macports.org/ticket/58800#comment:8>
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