Downloading GRASS Source

(Note: for binary installers, go here)

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 Release overview page
• Download at ​http://grass.osgeo.org/download/ or directly from
  • ​http://grass.osgeo.org/grass76/source/ (current)
  • ​http://grass.osgeo.org/grass74/source/ (old)
  • ​http://grass.osgeo.org/grass72/source/ (very old)
  • ​http://grass.osgeo.org/grass70/source/ (historical)
  • ​http://grass.osgeo.org/grass64/source/ (historical)
  • ​http://grass.osgeo.org/grass54/source/ (historical)

Weekly snapshots

Source code tarballs are available from here:

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

Git GRASS main source code repository

The GRASS GIS software lives in the ​Git source control system hosted by ​GitHub. It can be browsed online using ​GitHub UI. With the Git client software installed, various versions can be accessed:

  git clone https://github.com/OSGeo/grass.git

GRASS 7.7

(used to have the pseudo-name 7.5.svn till August 2018)

(used to have the pseudo-name 7.3.svn till November 2017)

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

  git checkout master
  # 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

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 ​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 specific release, e.g. the 6.4.0 release candidate 5 (RC5) from 2009, 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 RFC 2: Legal aspects of code contributions. Committers should take care to use https/ssh for access, and use their ​GitHub Account for authentication. See also How-To Contribute and How-To Git.

Git GRASS Addons source code repository

Want to contribute? Read on 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 RFC 2: Legal aspects of code contributions. Committers should take care to use https/ssh for access, and use their ​GitHub Account for authentication. See also How-To Contribute and How-To Git.

Online browseable live web interfaces to source code repository

• GitHub interfaces:
  • ​GRASS Core Repository
  • ​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 ​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 ​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 ​here.