#11395: Upgrade Gfan to latest release (version 0.5)
---------------------------+------------------------------------------------
   Reporter:  mhampton     |          Owner:  tbd              
       Type:  enhancement  |         Status:  new              
   Priority:  major        |      Milestone:  sage-4.7.1       
  Component:  packages     |       Keywords:  tropical geometry
Work_issues:               |       Upstream:  N/A              
   Reviewer:               |         Author:  Marshall Hampton 
     Merged:               |   Dependencies:                   
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Comment(by cschwan):

 On Gentoo we already did this, so here a little summary what to do:

  - in sage/interfaces/gfan.py, we have to change {{{cmd = 'gfan'}}} to
 {{{cmd = 'gfan_bases'}}} because the earlier is deprecated. If we do not
 do this, gfan prints:

  This is the Gfan program for computing Groebner fans and tropical
 varieties.
  Use the command "gfan list" to view all subcommands.
  The command "gfan" is deprecate for computing all Groebner bases of an
 ideal.
  Please use subcommand "gfan _bases" instead. Awaiting input. <Ctrl>-D to
 end.

  This confuses the current error detection code which assumes every output
 before commands as an error.

  - after adjusting the interface code, we have to review the failing
 doctests. On my box these are:
   - sage -t  -force_lib devel/sage-main/doc/fr/tutorial/tour_advanced.rst
   - sage -t  -force_lib devel/sage-main/doc/en/tutorial/tour_advanced.rst
   - sage -t  -force_lib devel/sage-
 main/sage/rings/polynomial/groebner_fan.py

  I did not have a closer look at them, but they look like gfan-0.5
 reorders its output.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11395#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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