[MacPorts] #57850: octave @4.4.1_2: Error message when starting Octave.app and broken online help using the doc function

[MacPorts]

#57850: octave @4.4.1_2: Error message when starting Octave.app and broken online
help using the doc function
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  Reporter:  maehne  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect  |     Status:  accepted
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  octave  |
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Comment (by MarcusCalhoun-Lopez):

 Just to document the progress:
 * The error happens in the
 [http://hg.savannah.gnu.org/hgweb/octave/file/1f46d371968c/libgui/src/documentation.cc#l75
 octave documentation code].
 * The Qt method
 [http://doc.qt.io/qt-5/qhelpenginecore.html#copyCollectionFile
 copyCollectionFile] returns false.
 * copyCollectionFile helpfully has the side affect that "file references
 to Qt Collection files (.qch) files are updated."
 * The time that octave_interpreter.qch was last modified is recorded in
 [http://hg.savannah.gnu.org/hgweb/octave/file/1f46d371968c/libgui/src/documentation.cc#l62
 octave_interpreter.qhc].
  * octave_interpreter.qch and octave_interpreter.qhc are built in the
 build phase.
  * The modification time of octave_interpreter.qch is recorded in
 octave_interpreter.qhc.
  * In the destroot phase, octave_interpreter.qhc is copied and thus gets a
 new modification time.
  * When first run, Octave attempt to update the modification time of
 octave_interpreter.qch in octave_interpreter.qhc.
 * The update fails because the user does not have write permission to
 ${prefix}/share/octave/4.4.1/doc/octave_interpreter.qhc.

 A fix being worked on is to preserve modification time when installing
 octave_interpreter.qch.

-- 
Ticket URL: <https://trac.macports.org/ticket/57850#comment:4>
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