author_lines_changed.sh

#!/bin/sh

# Get a list of authors
authors=""
git shortlog -s | cut -c8- | while read author; do
    add=0
    del=0
    git log $@ --author="$author" --pretty=tformat: --numstat | while read added removed file; do
        if echo "$file" | grep -v vendor && [ -n "$added" ] && [ -n "$removed" ] && [ "$added" != "-" ]; then
            add=$(( $add + $added ))
            del=$(( $del + $removed ))
        fi
        echo "$author added $add and removed $del"
    done | tail -n 1
done