Getting development information and code history from SVN

• "ChangeLog" style file: install and run ​svn2cl
• File history in SVN:

    cd path/to/directory/
    svn log [file.c]

    # or time reverted:
    svn log [file.c] | tac

• Bug: svn2cl ChangeLog loses file names at branch point. Problem and possible solution described here: ​http://article.gmane.org/gmane.comp.gis.grass.devel/26626/ ​http://article.gmane.org/gmane.comp.gis.grass.devel/26631

Switch the repository

To switch from SVN 'trunk' (now GRASS 7 development) to 'develbranch_6' (now GRASS 6.4 development) use

    cd /path/to/your/local/copy/trunk
    svn switch https://svn.osgeo.org/grass/grass/branches/develbranch_6 .

The switch command preserves local, uncommited changes.

SVN usage

• ​http://svnbook.red-bean.com/

• SVN prefers "atomic commits", i.e. commit changes to all files affected by a change at the same time, not in a series of commits (one for each file).

Merge between branches (backporting)

Run the command from within the target branch.

• Example 1: pull a change from trunk into the 6.3 release branch:

      cd releasebranch_6_3/
      svn merge -c 30749 https://svn.osgeo.org/grass/grass/trunk
  

where 30749 is the revision number of the changeset you wish to backport.

• Example 2: merge a change from the 6.4 development branch into GRASS 7 (trunk):

      cd trunk/
      svn merge -c 31154 https://svn.osgeo.org/grass/grass/branches/develbranch_6
  
  

Non-recursive checkout

• SVN does not allow you to check out a single file at a time. Sometimes this can be awkward as it can force you to checkout the entire repository for the sake of changing one file in the top directory.

Solution: do a --non-recursive checkout:

    svn checkout --non-recursive https://svn.osgeo.org/grass/grass-web/trunk/ trunk/

See Also

• ​http://developer.r-project.org/SVNtips.html