#!/bin/bash

set -eu

embed() {
	local tag="$1"
	local find="$2"
	local sourcefile="$3"
	
	while IFS= read -r line ; do 
		if [[ "${line}" =~ "${find}" ]] ; then
			echo -n "<${tag}>"
			cat "${sourcefile}"
			echo -n "</${tag}>"
		else
			echo "${line}"
		fi
	done
	
}

embed "$@"