rpm-build/scripts/shell.req.files

#!/bin/sh -efu
while IFS=$'\t' read -r f t; do
	case "$t" in
		#!/bin/sh
		*'Bourne shell script text'*)
			echo "$f" ;;
		#!/bin/bash
		*'Bourne-Again shell script text'*)
			echo "$f" ;;
		#!/usr/bin/env bash
		*' bash script text'*)
			echo "$f" ;;
		#!/bin/ash
		*' /bin/ash script text'*)
			echo "$f" ;;
	esac
done