[MacPorts] #66741: macports: provide version info to Apple system information

[MacPorts]

#66741: macports: provide version info to Apple system information
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  Reporter:  Zweihorn  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:  MacPorts 2.8.1
 Component:  base      |    Version:  2.8.0
Resolution:            |   Keywords:
      Port:            |
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Comment (by ryandesign):

 I suppose the problem is that the system information is from when an Apple
 installer package was used to install MacPorts, which is only for the
 initial install (or not at all, if the user builds from source).
 Subsequent updates of MacPorts base usually happen via the selfupdate
 mechanism which does not at present happen via an Apple installer package;
 it always happens from source. So even if we change the installer package
 to report its version it would only report the version you originally
 installed, not the one currently installed, and would not appear at all
 for from-source builds.

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Ticket URL: <https://trac.macports.org/ticket/66741#comment:1>
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