Scan a Localizable.string file and find its entries which are not used in the project

scan_strings.sh

#!/bin/bash

# Before launching:
# -     Copy the Base.lproj/Localizable.string to the same dir than this file
# -     In the project Dir: Remove all strings files (rm -rf *.lproj)
# -     Fill PROJECT_DIRECTORY

PROJECT_DIRECTORY=

echo "" > ./Localizable_results.txt
echo "" > ./Localizable_results_found.txt
echo "" > ./Localizable_results_not_found.txt

while read p; do # Get lines one by one
  line=`echo "$p"  | sed -e 's/ = ".*//g' -e 's/\/\*.*//g' -e 's/\/\/.*//g'` # Remove ` = "..."` + comments
  if [[ !  -z  $line  ]] # Skip empty lines
  then
      res=`grep -Rn "$line" $PROJECT_DIRECTORY` # Find String in project
      echo "$res" >> ./Localizable_results.txt
      if [[ !  -z  $res  ]]
      then
          echo "$line" >> ./Localizable_results_found.txt
      else
          echo "$line" >> ./Localizable_results_not_found.txt
      fi
      echo "" >> ./Localizable_results.txt
  fi
done < ./Localizable.strings