exp-util-ref-1

bash.sh

#!/usr/bin/env bash
set -euo pipefail

file="$1"

last_sha="$(git rev-list HEAD | tail -n 1)"

function sum_numbers() {
  perl -lane '$t+=$_ for @F; print $t'
}

file_diffs_sum="$(git diff --shortstat "${last_sha}" "${file}" | sum_numbers)"
all_diffs_sum="$(git diff --shortstat "${last_sha}" | sum_numbers)"

echo "file_diffs: ${file_diffs_sum}"
echo "all_diffs: ${all_diffs_sum}"

score="$(echo "scale=5 ; ${file_diffs_sum} / ${all_diffs_sum} * 100" | bc)"
echo "Score: ${score} percent"