= Downloading GRASS Source =

[[TOC]]

== Packaged Source ==

All source releases are available for download from:

 * '''GRASS 6.3.0: Current technical preview release: [wiki:Release/6.3.0-News]'''
 * '''GRASS 6.2.3: Current stable release: [wiki:Release/6.2.3-News]'''
 * GRASS 6.2.2: Older stable release: [wiki:Release/6.2.2-News]
 * GRASS 5.4.1: Latest very old stable release: [wiki:Release/5.4.1-News]
 * '''Download at http://grass.osgeo.org/download/''' or directly from
   * http://grass.osgeo.org/grass70/source/
   * http://grass.osgeo.org/grass64/source/
   * http://grass.osgeo.org/grass63/source/
   * http://grass.osgeo.org/grass62/source/
   * http://grass.osgeo.org/grass54/source/

== Weekly snapshots ==

 * http://grass.osgeo.org/grass63/source/snapshot/

== Subversion GRASS main source code repository ==

The GRASS GIS software lives in the [http://subversion.tigris.org/ Subversion] source control system. It can be browsed online using the [http://trac.osgeo.org/grass/browser Browse Source] button on the top bar. With the subversion client software installed, various versions
can be accessed:

=== GRASS 7 ===

The new '''development''' version of '''GRASS 7''' can be extracted using the command:

{{{
  svn checkout https://svn.osgeo.org/grass/grass/trunk grass_trunk
  #Subsequent updates:
  svn up
}}}

=== GRASS 6.4 ===

To extract the current '''development branch''' version of '''GRASS 6''' (leading to 6.4.0 stable) use the command:

{{{
  svn checkout https://svn.osgeo.org/grass/grass/branches/develbranch_6 grass6_devel
  #Subsequent updates:
  svn up
}}}

If you have a local trunk version and want to continue with GRASS 6 development, read here to easily [wiki:HowToSVN#Switchtherepository switch to this GRASS 6.4 development branch].

=== GRASS 6.3 ===

To extract the current '''release branch''' version (technology preview) use the command:

{{{
  svn checkout https://svn.osgeo.org/grass/grass/branches/releasebranch_6_3 grass63_release
}}}

=== GRASS 6.2 ===

To extract the old '''stable''' version use the command:

{{{
  svn checkout https://svn.osgeo.org/grass/grass/branches/releasebranch_6_2 grass62_release
}}}


Note: Write access to the Subversion repository is governed by [http://download.osgeo.org/grass/grass6_progman/rfc/rfc2_psc.html RFC 2: Legal aspects of code contributions]. Committers should take care to use https for access, and use their [http://www.osgeo.org/osgeo_userid OSGeo Userid] for authentication.

=== Committing code to SVN (developers with write access) ===

A commit command might look something like:

{{{
  svn commit -m "Distinguish between raster and vector backends (bug #999)" main.c --username glynn
}}}

After your first commit SVN will remember your OSGeo user id and password so --username only has be used the first time.

To add a new directory, please use (after checking that tmp files were removed and file permissions are appropriate):

{{{
  svn add newdir
  svn commit -m "New xyz functionality uploaded" newdir
}}}



== Subversion GRASS Addons source code repository ==

With the subversion client software installed, the current GRASS Addons can be extracted using the command:

{{{
  svn checkout https://svn.osgeo.org/grass/grass-addons grass-addons
}}}

Update access to the Subversion Addons repository is governed by [http://download.osgeo.org/grass/grass6_progman/rfc/rfc2_psc.html RFC 2: Legal aspects of code contributions]. Committers should take care to use https for access, and use their [http://www.osgeo.org/osgeo_userid OSGeo Userid] for authentication. A commit command might look something like:

{{{
  svn commit -m "Stereo DEM creation" main.c --username glynn
}}}

After your first commit SVN will remember your OSGeo user id and password so --username only has be used the first time.

To add a new directory, please use (after checking that tmp files were removed and file permissions are appropriate):

{{{
  svn add newdir
  svn commit -m "New xyz functionality uploaded" newdir
}}}


== Subversion GRASS repository dumpstreams ==

Incremental dumpstreams of GRASS SVN repository are available at [http://svn.osgeo.org/dumps/grass/].


== Online browseable live web interfaces to source code repository ==

 * TracBrowser interfaces:
   * [http://trac.osgeo.org/grass/browser/grass/ GRASS SVN]
   * [http://trac.osgeo.org/grass/browser/grass-addons/ GRASS Addons SVN]
   * [http://trac.osgeo.org/grass/browser/grass-web/ GRASS Web SVN]
 * [http://josef.fsv.cvut.cz/cgi-bin/viewcvs.cgi/?root=grass-osgeo ViewCVS interface]
   (Subversion backup note: svnsync runs 3 times per day)
 * [http://svn.osgeo.org/grass/ Raw SVN server HTML interface]

== SVN mirrors ==

 * http://svnmirror.osgeo.org is a mirror of all OSGeo repositories incl. GRASS that is on a 15 minute svnsync. The physical machine is located at TelaScience.org in San Diego, CA (USA).
 * A second GRASS SVN mirror is [http://josef.fsv.cvut.cz/cgi-bin/viewcvs.cgi/?root=grass-osgeo here] at the Czech Technical University in Prague (CZ), Faculty of Civil Engineering.

== Historical CVS ==

A copy of GRASS-CVS has been saved [http://josef.fsv.cvut.cz/cgi-bin/viewcvs.cgi/?root=grass-cvs-2007-12-09 here] at the Czech Technical University in Prague (CZ), Faculty of Civil Engineering.

== Historical checkouts ==

You can download the source code as it existed on a particular day as follows:

{{{
 svn co -r '{2008-09-01}' https://svn.osgeo.org/grass/grass/branches/develbranch_6 grass6_20080901
}}}

While SVN history for many individual files exists back to 1999, if you want to go back in time to GRASS 5 days you should use the GRASS 5 CVS instead. The directory layout was widely changed between GRASS 5 and 6 and the earliest version of GRASS 6 that will actually compile on its own will be just before the 5.7.0 development release.

== Compilation notes for various operating systems ==

Please see [http://grass.osgeo.org/wiki/Compile_and_Install here].