Recursively replacing a string in all files in a directory.

replace-recursive.sh

#!/bin/bash

#Define styls 
RESET_STYLE=$(tput sgr0)
RED_COLOR=$(tput setaf 1)
GREEN_COLOR=$(tput setaf 2)
YELLO_COLOR=$(tput setaf 3)
BOLD=$(tput bold)

#Get the current OS name 
PLATFORM=$(uname -s)


#User Inputs 
read -p 'Please enter the search directory absolute Path</var/www/>: ' SEARCH_DIR
read -p 'Please enter the search word: ' SEARCH_WORD
read -p 'Please enter the replace word: ' REPLACE_WORD


#Iterate the files using the SEARCH_WORD 
for f in `grep -lr "$SEARCH_WORD" $SEARCH_DIR`
do
    echo "${GREEN_COLOR} '$SEARCH_WORD' find in ${RESET_STYLE} ${YELLO_COLOR} $f ${RESET_STYLE}"
done

#Count the total number of files
COUNT_FILES=`grep -lr "$SEARCH_WORD" $SEARCH_DIR | wc -l`

#Set Nouns
FILE_NOUNS=`[[ $COUNT_FILES -gt 1 ]] && echo 'files' || echo 'file'`
   
echo "********************************************"
echo "${GREEN_COLOR} The '$SEARCH_WORD' word find in ${BOLD} $COUNT_FILES $FILE_NOUNS ${RESET_STYLE}"
echo "********************************************"
  

#Check users input and replace the word
echo "${GREEN_COLOR}Do you want to replace $SEARCH_WORD to $REPLACE_WORD? [Y,n]${RESET_STYLE}"
read input
if [[ $input == "Y" || $input == "y" ]]; then
  for f in `grep -lr "$SEARCH_WORD" $SEARCH_DIR`
  do
    #Check the OS
    if [[ $PLATFORM == "Darwin" ]]; then
      sed -i '' "s/${SEARCH_WORD}/${REPLACE_WORD}/g" $f;
    else
      sed -i "s/${SEARCH_WORD}/${REPLACE_WORD}/g" $f;
    fi
    
    echo "${GREEN_COLOR} '$SEARCH_WORD' replacing to '$REPLACE_WORD' in $f file. ${RESET_STYLE}"
  done
else
  echo "${RED_COLOR}${BOLD}EXIT!!!${RESET_STYLE}"
fi