[MacPorts] #35285: gimp-help-en won't upgrade - can't find libxml2

[MacPorts]

#35285: gimp-help-en won't upgrade - can't find libxml2
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 Reporter:  david.w.watson@…         |       Owner:  devans@…           
     Type:  defect                   |      Status:  new                
 Priority:  Normal                   |   Milestone:                     
Component:  ports                    |     Version:  2.1.1              
 Keywords:                           |        Port:  gimp-help-en       
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Comment(by macosx12345@…):

 Replying to [comment:15 ram@…]:
 > Shouldn't the full path to MacPorts python be used? i.e.
 `/opt/local/bin/python2.7` instead of `/usr/bin/env python2.7`?

 Maybe. Indeed, the present patch works only as long as the first pythonx.y
 in the `PATH` has the same version number as the requested variant of
 `gimp-help-en` and has an associated `libxml2`, which should be the most
 frequent case. Since `/usr/bin/env` may have some advantadges that I don't
 know, I left it and I leave it to some Python expert to give a better
 answer.

 On the other hand I made a mistake, depends_run.append should be
 depends_build.append since py-libxml2 is needed only during build — now
 corrected.

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Ticket URL: <https://trac.macports.org/ticket/35285#comment:19>
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