This page collects information about [http://grass.osgeo.org/wiki/GRASS_AddOns GRASS AddOns] management from developer point of view.

== !AddOns XML file ==

GRASS !AddOns metadata XML file can be created by [source:grass-addons/tools/addons/build-xml.py build-xml.py] Python script available from SVN. It's creating XML file `modules.xml` in `~/.grass6/addons` for GRASS 6 and in `~/.grass7/addons` for GRASS 7.

Example:

{{{
#!xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE task SYSTEM "grass-addons.dtd">
<modules version=7.0.svn>
    <task name="d.mon2">
        <description>Starts a graphics display monitor which can be controlled from the command line.</description>
        <keywords>display,CLI</keywords>
    </task>
    <task name="i.points.auto">
        <description>Generate ground control points for image group to be rectified.</description>
        <keywords>imagery,ground control points</keywords>
    </task>
...
    <task name="v.unpack">
        <description>Unpacks a vector map packed with r.pack.</description>
        <keywords>vector,import,copying</keywords>
    </task>
</modules>
}}}

There is also available script called [source:grass-addons/tools/addons/compile-xml.sh compile-xml.sh] which compiles GRASS !AddOns modules for GRASS 6 and GRASS 7 and creates XML metadata file. This script simply calls `compile.sh` and `build-xml.py`. When running the script the main log files is stored in `~/grass<version>/addons/make.log` and each modules logs in `~/.grass<version>/addons/log/<module>.log`. Beside that the script also print basic information about progress to standard output

{{{
At revision 49265.
-----------------------------------------------------
AddOns '/home/landa/.grass7/addons'...
-----------------------------------------------------
Compiling d.mon2... SUCCESS
Compiling i.points.auto... SUCCESS
...
Compiling v.unpack... SUCCESS
-----------------------------------------------------
AddOns '/home/landa/.grass6/addons'...
-----------------------------------------------------
Compiling d.barb... SUCCESS
Compiling d.edit.rast... SUCCESS
...
Compiling v.what.rast.buffer... SUCCESS
-----------------------------------------------------
Creating XML file '/home/landa/.grass7/addons/modules.xml'...
-----------------------------------------------------
Parsing <d.mon2>...  SUCCESS
Parsing <i.points.auto>...  SUCCESS
...
Parsing <v.unpack>...  SUCCESS
-----------------------------------------------------
Creating XML file '/home/landa/.grass6/addons/modules.xml'...
-----------------------------------------------------
Parsing <d.barb>...  FAILED
Parsing <d.edit.rast>...  SUCCESS
...
Parsing <v.what.rast.buffer>...  SUCCESS
}}}

== Compile !AddOns on MS Windows ==

Background: `g.extension` in winGRASS is not trying to compile given !AddOn as on GNU/Linux, it just downloads pre-compiled binaries from the server.

The GRASS !AddOns binaries are downloaded in winGRASS by default from http://wingrass.fsv.cvut.cz, eg. for GRASS 7 it's http://wingrass.fsv.cvut.cz/grass70/addons. The GRASS !AddOns are compiled on that server by script [source:grass-addons/tools/addons/compile.sh compile.sh] available from SVN.