git-most-people-modified

#!/usr/bin/env bash
set -e

declare -A counts

for file in $(git ls-files)
do
  count=$(git shortlog -s -n --all --no-merges $file | wc -l)
  counts[$file]=$count
done

max=-1
max_file=
for k in "${!counts[@]}"
do
  if [[ ${counts[$k]} -gt $max ]]; then
    max=${counts[$k]}
    max_file=$k
  fi
done

printf "Most people modify $max_file($max people)\n"