#!/bin/bash

ALL=false
PATH=./

usage()
{
  echo "Usage: $0 WORD [-a] [ -p PATH ]"
  exit 2
}

if [ $# = 0 ]
then
  usage
fi

WORD=$1
shift

while getopts 'ap:' OPTION
do
  case ${OPTION} in
  a)
    ALL=true ;;
  p)
    PATH=$OPTARG ;;
  esac
done

if [ "$ALL" = true ]
then
  RESULT=$(/bin/grep -lR ${WORD} $PATH)
else
  RESULT=$(/bin/grep -lR --include \*.txt --include \*.sh ${WORD} $PATH)
fi

echo "$RESULT"