[MacPorts] #38570: lua-lpeg @0.11: portfile parse error if lua is not installed

[MacPorts]

#38570: lua-lpeg @0.11: portfile parse error if lua is not installed
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  Reporter:  egall@…   |      Owner:  and.damore@…
      Type:  defect    |     Status:  closed
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.1.3
Resolution:  fixed     |   Keywords:
      Port:  lua-lpeg  |
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Comment (by jmr@…):

 Patching is fine too. But lib dependencies aren't guaranteed to be
 available in the patch phase either, so you need to use backticks instead
 of exec to make the command execute in the makefile rather than the
 portfile.

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Ticket URL: <https://trac.macports.org/ticket/38570#comment:7>
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