#!/bin/bash
set -o errexit -o nounset -o pipefail

export PATH=~/.cargo/bin:"$PATH"

find src -type f -name '*.rs.bk' -delete

cargo fmt -- --write-mode replace

n=0
while read -d '' -r path
do
  [[ -s $path ]] || continue
  echo "Not formatted as auto-formatting would: ${path%.bk}"
  diff -u "$path" "${path%.bk}" | head -n10
  n=$((n + 1))
done < <(find src -type f -name '*.rs.bk' -print0)

exit "$n"