report-commit-effort

thisYear="2016"
nextYear="$thisYear"
for month in {1..12};
do
  nextMonth=$(expr 1 + $month)
  if [ "$month" -eq  12 ];
  then
    nextYear=$(expr 1 + $thisYear)
    nextMonth="1"
  fi
  range="--after=$thisYear-$month-01 --before=$nextYear-$nextMonth-01"
  echo "[$thisYear/$month]"
  git shortlog --no-merges -sne $range | awk '{sum+=$1; dev+=1; print $0} END{printf "---\n%s\tcommits\n%s\tcontributors\n",sum,dev}'
done

echo "[GENERAL REPORT $thisYear]"
git shortlog --no-merges --since=1.year -sne | awk '{sum+=$1; dev+=1; print $0} END{printf "---\n%s\tcommits\n%s\tcontributors\n",sum,dev}'