[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 ryandesign):

 Oh. Can you show a log example of that?

 For buildbot I was thinking it would be enough to record the timestamp
 during one run, so that the next run (which might be after a reboot with
 fixed clock) could check it. But on Travis, where the environment is
 thrown away after every build, we might need to actually inspect files in
 the ports tree.

 I do have a script somewhere that finds the newest modification date of
 any file in a directory. Maybe that's what we would need to do.

 Alternately, since time on Travis is precious, maybe our strategy should
 be to identify Portfiles newer than now and `touch` them to bring their
 modification time back to now. Then we can proceed with a build
 immediately.

 Or maybe we need to revisit why MacPorts checks Portfile timestamps in the
 first place. If this affects buildbot and Travis maybe it affects some
 users too.

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Ticket URL: <https://trac.macports.org/ticket/58800#comment:2>
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