[MacPorts] #51981: jython: Fix issue upgrading from 2.5.2 to 2.7.0

[MacPorts]

#51981: jython: Fix issue upgrading from 2.5.2 to 2.7.0
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  Reporter:  aaron+macports@…  |      Owner:  macports-tickets@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:  haspatch
      Port:  jython            |
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Comment (by aaron+macports@…):

 Starting in 2.7.0 we are installing by default a wrapper script that
 places the cache in the user's home directory, because otherwise the cache
 needs to be world-writable and this is undesirable from a security
 standpoint.

 Wiping the system cache is OK in my opinion because in the default setup
 no one will be using it, and it's not actually very intensive to create in
 the first place (it is generated on the fly when jython loads a novel JAR,
 and in my experience it's plenty fast, like ~1s for the first run which
 includes all JARs bundled with the system Java).

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Ticket URL: <https://trac.macports.org/ticket/51981#comment:2>
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