git ls-files -z | xargs -0n1 git blame -w | perl -n -e '/^.*?\((.*?)\s+[\d]{4}/; print $1,"\n"' | sort -f | uniq -c | sort -n
30 Fabien Casoni
338 Raphael Morand
16630 Teddy Fontaine
* Language plugin
* Exercise plugin
* Feedback plugin
* Core
* Account plugin
* Course plugin
* Blog plugin
* Server plugin
* ServerCom plugin
* Badge plugin
* History plugin
* Key plugin
* Forum plugin