[MacPorts] #51599: main.log is never deleted with "keeplogs yes"

[MacPorts]

#51599: main.log is never deleted with "keeplogs yes"
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  Reporter:  ryandesign  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  base        |    Version:  2.3.99
Resolution:              |   Keywords:
      Port:              |
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Comment (by kurthindenburg):

 After r146737, I think keeplogs became confusing.  Perhaps we need another
 variable: truncate_logs.

 Truncating (instead of appending) the logs at the start will only keep one
 log file.

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Ticket URL: <https://trac.macports.org/ticket/51599#comment:7>
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