= Introduction =

This page contains developer documentation that is useful, but rarely needed. 
 
= Converting SVN revisions to Git patches =

There's a Python script available that converts SVN revisions into patches ''git am'' can understand:

 * http://blog.repl.ca/2009/06/converting-svn-commits-to-git-patches.html

To use this script, copy it into the SVN repository root as ''svnrev2git.py''. Then create an authors file using this format:

{{{
svnusername, firstname lastname, email
}}}

For example:

{{{
johndoe, John Doe, john.doe@domain.com
}}}
To use the script, call it like this:

{{{
$ python svnrev2git.py authors <revision>
$ python svnrev2git.py authors <revision_start>-<revision_end>
}}}

For example:

{{{
$ python svnrev2git.py authors 8126
$ python svnrev2git.py authors 8126-8225
$ for REV in 8206 8212 8219 8225; do python svnrev2git.py authors $REV;done
}}}

Note that the script is slow in processing long revision ranges: it's usually a better idea to pick the required revisions by hand.

= Poor-man's Symdiff =

Andj came up with a clever script in [http://thread.gmane.org/gmane.network.openvpn.devel/4869 an IRC meeting] to generate diffs that make reviewing refactoring patches easier:

{{{
#!/bin/bash
git diff $1 $2 >/tmp/difftmp123.txt
cat /tmp/difftmp123.txt |grep "^-" |sed s/^-// >/tmp/removed123.txt
cat /tmp/difftmp123.txt |grep "^+" |sed s/^+// >/tmp/added123.txt
diff /tmp/removed123.txt /tmp/added123.txt -u
}}}

This is similar to [http://research.microsoft.com/en-us/projects/symdiff Symdiff].