[MacPorts] #49101: Ensure that macports $HOME exists and is valid

[MacPorts]

#49101: Ensure that macports $HOME exists and is valid
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  Reporter:  oyamada@…  |      Owner:  ryandesign
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:  2.3.4
Resolution:             |   Keywords:
      Port:             |
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Comment (by ryandesign):

 Replying to [comment:31 oyamada@…]:
 > I am updating three MacBooks (new Pro, three-year-old Pro, and two-year-
 old Air). With all those three, the home directory was set to
 "/Users/macports". I installed the MacPorts base using the installer
 "MacPorts-2.3.4-10.11-ElCapitan.pkg". Is not it because of a possible bug
 in the installer?

 Apple's Migration Assistant will by default try to be "helpful" and move
 the macports user's home directory to /Users/macports, which we do not
 want. (The same would happen to other user accounts that some MacPorts
 ports create, which we don't want either.) So if you had ever migrated the
 data to these computers from other Macs, and you did not tell it not to
 migrate the macports user (and other users MacPorts ports create), then
 this could explain the problem.

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Ticket URL: <https://trac.macports.org/ticket/49101#comment:41>
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