Bash Script to Search and Replace across Multiple files

inplace_replace.sh

#!/bin/bash
echo "Updating Files"
FILE_LIST=`find . -type f | grep -E "\.(rs|ts|tsx)$"` #Choose your prefered file types here
REPLACEMENTS_LIST=("s/Example/TitlecaseReplacement/g" "s/example/snake_case_relacement/g") #Add more replacements here as desire

echo "Replacing:"
for REPLACEMENT in ${REPLACEMENTS_LIST[@]}
do
    echo $REPLACEMENT
done
echo "In these files:"
for FILE in $FILE_LIST
do
    echo $FILE
done

read -p "Continue (y/n)?" choice
case "$choice" in 
  y|Y ) echo "yes";;
  * ) exit;;
esac

for FILE in $FILE_LIST
do
    echo $FILE
    cp $FILE $FILE.bak
    for REPLACEMENT in ${REPLACEMENTS_LIST[@]}
    do
        echo $REPLACEMENT
        sed -i '' $REPLACEMENT $FILE
    done
done

read -p "Delete .bak files (y/n)?" choice
case "$choice" in 
  y|Y ) echo "yes";;
  * ) exit;;
esac

for FILE in $FILE_LIST
do
    echo $FILE
    rm $FILE.bak
done