Search for nodes in an XML containing an expression and report the xpaths of the findings, using xml-coreutils and coreutils

xml_grep.sh

#!/bin/bash
SEARCH_STRING="${1}"
ROOT_NODE="${2}"
FILE="${3}"
XPATHS=( $(xml-grep --extended-regexp --attributes "${SEARCH_STRING}" "${FILE}" | xml-fmt | xml-find | sed 's@^/root@/'"${ROOT_NODE}"'@' | tac) )
i_="";
NODE_XPATHS=( $(for i in "${XPATHS[@]}"; do if ! echo "${i_}" | egrep -q "${i}"; then echo "${i}"; fi; i_="${i}"; done) )
for i in "${NODE_XPATHS[@]}"; do
        k=1;
        for j in $(xml-printf '%s' "${FILE}" ":${i}"); do
                if echo "${j}" | egrep -q -E "${SEARCH_STRING}"; then
                        echo "${i}[${k}]: ${j}"
                fi
                k=$[${k}+1]
        done
done