#!/usr/bin/env sh
set -eu

failed=0
cr=$(printf '\r')

staged_shell_files=$(git diff --cached --name-only --diff-filter=ACMR | grep -E '\.sh$' || true)

for file in $staged_shell_files; do
  mode=$(git ls-files --stage -- "$file" | awk '{print $1}')
  if [ "$mode" != "100755" ]; then
    echo "ERROR: $file is not executable in Git index. Run: git add --chmod=+x $file" >&2
    failed=1
  fi

  if git show ":$file" | grep -q "$cr"; then
    echo "ERROR: $file contains CRLF in staged content. Use LF line endings." >&2
    failed=1
  fi
done

if [ "$failed" -ne 0 ]; then
  echo "Pre-commit check failed." >&2
  exit 1
fi