Determine current code distribution by author

Question

I thought it would be neat if it were possible to take a Git repository, run some script, and have it generate the number of lines in the code base, and the proportion of each a

Answer 1

You can use git log, as illustrated in "Which Git commit stats are easy to pull".

Or you can have a look at Git Lookatgit project, which does inspect the number of lines changed, as seen in its gitauthor.rb class.