#!/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 "${line}"
fi
done
}
embed "$@"