[GRASS-dev] [GRASS GIS] #3632: Add a function to read parameters from a file to the parser

[GRASS GIS]

#3632: Add a function to read parameters from a file to the parser
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  Reporter:  wenzeslaus  |      Owner:  grass-dev@…
      Type:              |     Status:  new
  enhancement            |
  Priority:  normal      |  Milestone:  8.0.0
 Component:  Parser      |    Version:  unspecified
Resolution:              |   Keywords:  g.parser options parameters file
       CPU:              |  long CLI
  Unspecified            |   Platform:  Unspecified
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Comment (by mmetz):

 Replying to [comment:1 mlennert]:
 > As much as I've found the file option for r.series et al very useful, I
 cannot say that I have been confronted with situations where I felt a need
 for your proposed approach.

 +1
 > I definitely would not want it to replace the file option.

 +1
 >
 > If we go for such a parameter file, I would suggest to keep it very
 simple, i.e. one format, with my preference going to the one used in your
 example with a simple parameter=value pair per line, maybe with a special
 treatment of flags to create something like in the python parser, i.e.
 with the possibility to cite several flags at once:
 >
 > {{{
 > [...]
 > flags=ng
 > }}}
 >
 > instead of
 >
 >
 > {{{
 > [...]
 > -n
 > -g
 > }}}

 or simply:
 {{{
 -ng
 }}}

 the parser already handles something like `-ng`

 Using the example
 {{{
 r.slope.aspect elevation=dtm slope=dtm_slope aspect=dtm_aspect -n
 }}}
 what is the advantage of the proposed approach over a file that contains
 exactly this line and executing this file? This is already working and
 handled by the OS.

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/3632#comment:2>
GRASS GIS <https://grass.osgeo.org>