[MacPorts] #43738: gnuplot: upgrade to 5.0

[MacPorts]

#43738: gnuplot: upgrade to 5.0
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  Reporter:  mojca@…  |      Owner:  mojca@…
      Type:  update   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:  haspatch
      Port:  gnuplot  |
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Comment (by devans@…):

 The port has a vert extensive and well anotated set of demos which not
 only serve as a test of functionality but also a nice tutorial.  After
 building the port, I was able to run them all successfullly but only after
 I overcame a few of my own naive assumptions.

 First try.  The all-inclusive demo, all.dem is installed in
 ${prefix}/share/doc/gnuplot/demo so I did this
 {{{
 cd ~
 gnuplot ${prefix}/share/doc/gnuplot/demo/all.dem
 }}}

 This fails with file not found errors because the file references in the
 scripts are interpreted as relative to the CWD.

 Second try

 {{{
 cd ${prefix}/share/doc/gnuplot/demo
 gnuplot all.dem
 }}}

 This works better but fails again if the script issues any warning/error
 messages.  gnuplot is trying to write these messages to a log file which
 by defalt is located in the CWD but the user usually doesn't have write
 permission to the MacPorts installation tree.

 Third try, copy the demos to a writable directory in the user's home
 directory

 {{{
 mkdir ~/macports/gnuplots
 cp -R ${prefix}/share/doc/gnuplot/demo ~/macports/gnuplots
 cd ~/macports/gnuplots/demo
 gnuplot all.dem
 }}}

 Success!! All demos work correctly.

 I acknowlege again that this was all due to my naive ideas about how a
 demo might work but you might consider adding some notes to the Portfile
 advertizing the demos as a starting point for the naive user and how to
 install them locally so they work without hiccups. This would answer the
 question, "Ok, I installed the port -- what now?"

-- 
Ticket URL: <https://trac.macports.org/ticket/43738#comment:15>
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