[mapserver-users] passing variables to includes

[Seth G]

Hi list,

If you are Python users then the mappyfile library (disclosure - I've
been working on it since the start of this year), could solve many of
the issues of working and manipulating Mapfiles.
http://mappyfile.readthedocs.io/en/latest/
Online example: http://mappyfile.geographika.net/
https://github.com/geographika/mappyfile

Validation and deprecation warnings on on the roadmap. 
Regards,

Seth


--
web:http://geographika.co.uk
twitter: @geographika


On Mon, Oct 16, 2017, at 05:22 PM, Lime, Steve D (MNIT) wrote:
> Need the mapfile equivalent of SASS... A standard, platform-
> independent pre-processor would be nice. I’ve heard of folks using the
> C pre-processor to do this sort of thing so they’d have a version of a
> mapfile (and no includes) full of #define and #ifdef structures. In
> some cases I’ve gone nuts with includes and then used a super simple
> MapScript script that reads and then immediately saves things to an
> optimized (sort of compiled) version with no includes.>  


> Something like variables (and maybe functions) could potentially be
> built into mapfile processing itself. I could see  (for example)
> setting a block like so at the mapfile level:>  


> VARIABLES


>   ‘key1’ ‘value1’


>   ‘key2’ ‘value2’


>   …


> END


>  


> And then setting a mechanism to reference them as the file is
> processed (COLOR {key1}). The nice thing about this approach is that
> includes would take their cue from the parent mapfile and could behave
> differently for different parents. That would be great for doing
> something like map themes. Just thinking out loud.>  


> Steve


>  


> *From:* mapserver-users [mailto:mapserver-users-
> bounces at lists.osgeo.org] *On Behalf Of *lars.schylberg at blixtmail.se
> *Sent:* Friday, October 13, 2017 6:41 AM *To:* mapserver-
> users at lists.osgeo.org; Jörg Thomsen (WhereGroup)
> <joerg.thomsen at wheregroup.com> *Subject:* Re: [mapserver-users]
> passing variables to includes>  


> Hi Jörg,
>
>  I also had this same thought and it would be a good mechanism. But I
>  solved it with my own preprocessing.
>
>  I have been doing Nautical charts with Mapserver for a couple of
>  years and realized that I was reusing the same layers up to 18 times.
>
>  So I did templates where I had LAYER->NAME, LAYER->GROUP, LAYER->DATA
>  and STYLE->COLOR as variables in Mapserver templates. Color for
>  instance has fixed names like "DEPVS", that means depth very shallow.
>  But depending on if it is day mode, dawn dusk mode or night mode the
>  colors have different rgb or hex values. All variables are stored in
>  csv files.  The variables are read into associative arrays in a bash
>  script.  Then  I use my Mapserver mapfile templates that are
>  processed with a very long sed statement  that substitutes the
>  variables depending on color mode and scale level.
>
>  Layer names and groups have one csv file that tells how to assemble
>  all the layers.  To make it even more flexible, I can also use
>  offical IHO colors, Swedish or French color tables to get different
>  look and feel.
>
>  An example is for instance the layer template for rivers:
>
>  #### Rivers Lines ####
>
>  LAYER    NAME  "Rivers_line_{CL}"    GROUP "{GROUP}"    METADATA
>  "ows_title"   "Rivers"        "ows_enable_request"   "*"
>  "gml_include_items" "all"        "wms_feature_mime_type" "text/html"
>  END    TEMPLATE blank.html    TYPE LINE    STATUS ON
>  MAXSCALEDENOM {MAXSCALE}    DATA "{PATH}"    CLASS        NAME
>  "Rivers (lines)"        STYLE
>             # DEPVS RGB # COLOR {DEPVS_rgb}
>             COLOR "{DEPVS}" WIDTH 1.5
>             # RGB # COLOR {OUTLL_rgb}
>             OUTLINECOLOR "{OUTLL}" OUTLINEWIDTH 0.3 END END END
>
>
>  All this can be seen in the git hub:
>  https://github.com/LarsSchy/SMAC-M I finally got permission from my
>  company to release it this summer, so that we can discuss this. I
>  would like to do a demo site with open data, but haven't had time to
>  do this yet.
>
>  The script: process_layer_color.sh shows the real processing part and
>  the sed script.
>
> https://github.com/LarsSchy/SMAC-M/blob/master/chart-installation/generate_map_files/scripts/process_layer_colors.sh
>
>  Have fun
>
>  Lars Schylberg Saab AB>  


> -----Originalmeddelande-----
>  > Från: "Jörg Thomsen (WhereGroup)" <joerg.thomsen at wheregroup.com>
>  > Till: mapserver-users at lists.osgeo.org Datum: 2017-10-13 09:43 Ämne:
>  > [mapserver-users] passing variables to includes
>  >
>  > Hi,
>  >
>  > I had a MapServer Training this week and one of the participations
>  > asks a nice question:
>  >
>  > Is it possible to pass variables to includes? I think this is a
>  > very good idea, it could save a lot of includefiles. In know it's
>  > very close to mapscript, but has anyone done this without?
>  >> _________________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/mapserver-users

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