Search text files in current folder (Recursive, RegExp)

search_for_text_in_folder.sh

#!/bin/bash

KEYWORD=$(zenity --entry --title="Search folder for..." --text="RegExp:" --entry-text "");
case "$?" in
1 )
  exit 1
  ;;
esac
if [[ "${KEYWORD}" = "" ]]; then 
exit 1
fi
rm -f "${PWD}/grep_text_search.txt"
cd "${PWD}"
echo "Searched for '${KEYWORD}' inside '${PWD}'" >> "${PWD}/grep_text_search.txt"
echo " " >> "${PWD}/grep_text_search.txt"
RESULTSTRING=$(grep -inIEr --exclude-dir=".git" --exclude-dir=".svn" --exclude="grep_text_search.txt" --regexp="${KEYWORD}" "${PWD}")
echo "${RESULTSTRING}" >> "${PWD}/grep_text_search.txt" &&\
gedit "${PWD}/grep_text_search.txt" &