[MacPorts] #63589: base: port select blindly overwrites pre-existing binaries, without warning

[MacPorts]

#63589: base: port select blindly overwrites pre-existing binaries, without warning
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  Reporter:  mascguy  |      Owner:  (none)
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  base     |    Version:
Resolution:           |   Keywords:  select
      Port:           |
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Comment (by ryandesign):

 Agreed.

 If port select were to simply stop if it encountered an existing file, it
 would potentially leave the user's system in an inconsistent state with
 some symlinks having been created and others not. See #58785 for more on
 that.

 Implementing this feature might somehow be helped if port select recorded
 the symlinks in the registry. See #43996 for more on that.

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Ticket URL: <https://trac.macports.org/ticket/63589#comment:3>
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