[MacPorts] #70539: base: failure for building some ports (depending on conditions) when Macports is installed at deeper directory hierarchy with "--prefix" option

[MacPorts]

#70539: base: failure for building some ports (depending on conditions) when
Macports is installed at deeper directory hierarchy with  "--prefix"
option
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  Reporter:  nanigashi-uji  |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  base           |    Version:  2.10.0
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by nanigashi-uji):

 The above patch keeps the paths for each port under
 "${prefix}/var/macports/sources", so there is no problem in terms of
 avoiding conflicts between ports, and the full path can be reproduced by
 adding "${portdbpath}/sources" at the beginning. On the other hand, in the
 original code, if "${prefix}" contains "_", the name conversion is not
 one-to-one mapping, so this is not the best method, I think.

-- 
Ticket URL: <https://trac.macports.org/ticket/70539#comment:7>
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