Check files for DOS/Windows line endings.

check-CRLF.bash

#!/usr/bin/env bash
# -----------
# Check files for DOS/Windows line endings.
# -----------
[ -a "$1" ] || {
  echo 'Check files for DOS/Windows line endings.'
  echo "Usage: ${0##*/} {filename}"
  exit 0
}
which dos2unix > /dev/null || {
  echo 'This script requires dos2unix. Please run: sudo apt install dos2unix'
  exit 2
}
dos2unix < $1 | cmp -s - $1;
[ $? -ne 0 ] && {
  echo "- $1 has DOS/Windows line endings"
  exit 1
}
exit 0