Shell script to update invoice refs

update_invoice_refs.sh

#!/bin/bash

from=(
  FeeHelper
  InvoiceCorrection
  InvoiceReverser
  InvoiceOpener
  LineItemReverser
  TaxHelper
  VatHelper
  LineItemGenerator
  InvoiceFinalizer
)

to=(
  FeeService
  InvoiceCorrectionService
  InvoiceReverserService
  InvoiceOpenService
  LineItemReverserService
  TaxService
  VatService
  LineItemGenerationService
  InvoiceFinalizerService
)

for index in ${!from[*]}; do 
  git grep "${from[$index]}" | cut -d':' -f1 | uniq | xargs sed -i "" "s/${from[$index]}/${to[$index]}/g";
done