= Downloading GRASS GIS Source =

(Note: for binary installers, go [https://grass.osgeo.org/download/ here])

[[TOC]]

== Packaged Source ==

The source code of all official releases is available for download from:

 * For a release download list (GRASS GIS 5.x to 7.x), see '''[wiki:Release]''' overview page
 * Download at https://grass.osgeo.org/download/ or directly from
   * https://grass.osgeo.org/grass78/source/ (upcoming stable)
   * https://grass.osgeo.org/grass76/source/ (current)
   * https://grass.osgeo.org/grass74/source/ (old)
   * https://grass.osgeo.org/grass72/source/ (very old)
   * https://grass.osgeo.org/grass70/source/ (historical)
   * https://grass.osgeo.org/grass64/source/ (historical)
   * https://grass.osgeo.org/grass54/source/ (historical)

== Weekly snapshots ==

Source code tarballs are available from here:

 * https://grass.osgeo.org/grass77/source/snapshot/ (development)
 * https://grass.osgeo.org/grass76/source/snapshot/ (stable)
 * https://grass.osgeo.org/grass74/source/snapshot/ (old stable)
 * https://grass.osgeo.org/grass72/source/snapshot/ (historical)
 * https://grass.osgeo.org/grass70/source/snapshot/ (historical)
 * https://grass.osgeo.org/grass64/source/snapshot/ (historical)

== Git GRASS main source code repository ==

The GRASS GIS software lives in the [https://git-scm.com Git] source control system hosted by [https://github.com GitHub]. It can be browsed online using [https://github.com/OSGeo/grass GitHub UI]. With the Git client software installed, various versions can be accessed:

{{{
  git clone https://github.com/OSGeo/grass.git
}}}
=== GRASS 7.9 ===

The '''development branch''' ('''master''') version of '''GRASS 7'''  can be extracted using the command:

{{{
  git checkout master
  # subsequent updates:
  git pull
}}}

=== GRASS 7.8 ===

To extract the current '''7.8.x release branch''' version ('''stable'''), use the command: 

{{{
  git checkout releasebranch_7_8
  # subsequent updates:
  git pull
}}}


=== GRASS 7.6 ===

To extract the current '''7.6.x release branch''' version ('''stable'''), use the command: 

{{{
  git checkout releasebranch_7_6
  # subsequent updates:
  git pull
}}}

=== GRASS 7.4 ===

To extract the current '''7.4.x release branch''' version ('''old'''), which may receives bugfixes, use the command: 

{{{
  git checkout releasebranch_7_4
  # subsequent updates:
  git pull
}}}

=== GRASS 7.2 ===

''Note: not recommended any more since May 2019''

~~To extract the current '''7.2.x release branch''' version ('''historical'''), use the command:~~

{{{
  git checkout releasebranch_7_2
  # subsequent updates:
  git pull
}}}


=== GRASS 7.0 ===

''Note: not recommended any more since May 2016''

~~To extract the current '''7.0.x release branch''' version ('''historical'''), use the command: ~~

{{{
  git checkout releasebranch_7_0
  # subsequent updates:
  git pull
}}}

=== GRASS 6.4 ===

Legacy code of GRASS GIS versions 3.2, 4.x, 5.x, 6.x (1987-2016) is available from `grass-legacy` Git repository hosted on [https://github.com/OSGeo/grass-legacy GitHub].

To extract the current state of the old '''6.4.x release branch''' version ('''historical'''), use the command:

{{{
  git clone https://github.com/OSGeo/grass-legacy.git
  cd grass-legacy
  git checkout releasebranch_6_4
}}}

To extract a [wiki:Release specific release], e.g. the '''6.4.0 release''' from 2010, use the command:

{{{
  git checkout release_20100903_grass_6_4_0
}}}


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

Note: Write access to the Git repository is governed by [wiki:RFC/2_LegalAspectsOfCodeContributions RFC 2: Legal aspects of code contributions]. Committers should take care to use https/ssh for access, and use their [https://github.com GitHub Account] for authentication. See also [wiki:HowToContribute How-To Contribute] and [wiki:HowToGit How-To Git].

== Git GRASS Addons source code repository ==

''Want to contribute? Read on [wiki:HowToContribute#WriteaccesstotheGRASS-Addons-SVNrepository here]''

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

{{{
  git clone https://github.com/OSGeo/grass-addons.git
}}}

Update access to the Git Addons repository is governed by [wiki:RFC/2_LegalAspectsOfCodeContributions RFC 2: Legal aspects of code contributions]. Committers should take care to use https/ssh for access, and use their [https://github.com GitHub Account] for authentication. See also [wiki:HowToContribute How-To Contribute] and [wiki:HowToGit How-To Git].

== Online browseable live web interfaces on !GitHub source code repository ==

 * !GitHub interfaces:
   * [https://github.com/OSGeo/grass GRASS Core Repository]
   * [https://github.com/OSGeo/grass-addons GRASS Addons Repository]

== Historical SVN ==

While SVN history for many individual files exists back to 1999. GRASS source code has been migrated to Git in May 2019.

 * http://svn.osgeo.org/grass
 * Online browseable UI, https://trac.osgeo.org/grass/browser

== Historical CVS ==

 * Our [http://freegis.org/cgi-bin/viewcvs.cgi/ old GRASS 5/6.1 CVS at freegis.org] (ViewCVS interface; no longer updated since move to OSGeo SVN)
 * 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:

{{{
git checkout 'master@{2008-09-01}'
}}}

== Compilation notes for various operating systems ==

Please see [https://grasswiki.osgeo.org/wiki/Compile_and_Install here].