#!/bin/bash

function getInsertA {
	git log --author="$1" --no-merges --oneline --shortstat | grep "insertions" | cut -d " " -f5 | sed '/^$/d' | paste -sd+ | bc
}

function getDeleteA {
	git log --author="$1" --no-merges --oneline --shortstat | grep "deletions" | cut -d " " -f7 | sed '/^$/d' | paste -sd+ | bc
}

#author list
author=$(git log --format="%aN" | sort | uniq)
insertsALL=$(git log --no-merges --oneline --shortstat | grep "insertions" | cut -d " " -f5 | sed '/^$/d' | paste -sd+ | bc)
deletesALL=$(git log --no-merges --oneline --shortstat | grep "deletions" | cut -d " " -f7 | sed '/^$/d' | paste -sd+ | bc)
bothALL=$(($insertsALL + $deletesALL))

for user in $author; do
	ins=$(getInsertA $user)
	del=$(getDeleteA $user)
	both=$(($ins + $del))
	insp=$(python -c "print (int(($ins./$insertsALL)*1000)/10.)")
	delp=$(python -c "print (int(($del./$deletesALL)*1000)/10.)")
	bothp=$(python -c "print (int(($both./$bothALL)*1000)/10.)")
	echo "$user: $ins ($insp%) insertions, $del ($delp%) deleteions, $both ($bothp%) both"
done