[MacPorts] #64960: use_7z, use_bzip2, use_lzip, use_lzma, use_tar, use_xz, use_zip cannot be undone

[MacPorts]

#64960: use_7z, use_bzip2, use_lzip, use_lzma, use_tar, use_xz, use_zip cannot be
undone
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  Reporter:  ryandesign  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  base        |    Version:  2.7.2
Resolution:              |   Keywords:
      Port:              |
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Comment (by ryandesign):

 The difficulty with a format-agnostic extractor is that we need to know
 ahead of time what extract dependencies, if any, to add, since
 dependencies get installed before the port's phases get run. We need to
 know what dependencies to add before the file that would tell us what
 format it is has been downloaded.

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Ticket URL: <https://trac.macports.org/ticket/64960#comment:3>
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