1. Install Gitstats
git clone git://github.com/hoxu/gitstats.git
and Gnuplot
brew install gnuplot
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2. From "Gitstats" dir
gitstats /Users/yanniskolovos/Sites/Project_name Project_name
gitstats target output
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Requirements
Git
Python
Gnuplot
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http://stackoverflow.com/questions/9301759/how-can-i-use-gitstats-to-find-out-how-many-sloc-a-git-repo-has-in-total-and-per