[MacPorts] #38687: ncarg @6.1.2_1 missing ncl executable

[MacPorts]

#38687: ncarg @6.1.2_1 missing ncl executable
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  Reporter:  c.brierley@…  |      Owner:  takeshi@…
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.3
Resolution:                |   Keywords:
      Port:  ncarg         |
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Comment (by ryandesign@…):

 Has duplicate #41902.

 Replying to [comment:4 ryandesign@…]:
 > Takeshi, the first I'd do is have the port check (in a post-build block)
 that ncl (and perhaps some other key programs) got built, and exit with an
 error if not. See the cdrtools port for an example of how this can be
 done, though it can probably be simplified for ncarg, assuming its build
 location is always the same (cdrtools' varies by machine).

 This still needs to be done. The port currently detects that ncl didn't
 get built, but in that case it merely prints a message and continues
 instead of exiting. The attached patch fixes this, and a few other
 portfile issues, including removing unnecessary lines and using `system`'s
 `-W` flag.

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Ticket URL: <https://trac.macports.org/ticket/38687#comment:19>
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