MC Java lwjgl checker

checklwjgl.sh

#!/bin/bash

function error {
  echo -e "\e[91m$1\e[39m"
  exit 1
}

while true;do
  
  #exit if multiple scripts running
  scriptlist="$(ps aux | grep "$(basename "$0")" | grep bash | grep -v grep)"
  numscripts="$(echo "$scriptlist" | wc -l)"
  if [ "$numscripts" -gt 2 ];then
    echo "multiple $(basename "$0") scripts running. Exiting now."
    echo "$scriptlist"
    exit 0
  fi
  
  #get every file matching instance.json in instances folder
  files="$(find ~/Minecraft/ATLauncher/instances -name instance.json)"

  PREIFS="$IFS"
  IFS=$'\n'

  #loop that operates on one file at a time
  for file in $files ;do
    #determine what minecraft version each file runs
    version="$(cat "$file" | grep '    "version":' | head -n1 | awk '{print $2}' | tr -d '", ')"
    
    #exit if version variable empty
    [ -z "$version" ] && error "minecraft-parser.sh: Failed to determine version for $file file!"
    
    echo -n "${version}: "
    
    #if version less than 1.13.0
    if [ "$(echo -e "1.13.0\n${version}.0" | sort -V | head -n1)" = "1.13.0" ]; then 
      echo "Greater than or equal to 1.13.0"
      echo "Nothing to do"
    else
      echo "Less than 1.13.0"
      echo "Enabling lwjgl2arm32..."
      if cat "$file" | grep -q lwjgl2arm32;then
        true
        echo "lwjgl2arm32 already found in $file"
      elif cat "$file" | grep -q javaArguments;then
        #javaArguments found, so just add it there
        echo "javaArguments found in $file, so just adding lwjgl2arm32..."
        sed -i 's?    "javaArguments": "?    "javaArguments": "-Dorg.lwjgl.librarypath='$HOME'/lwjgl2arm32 ?g' "$file"
      else
        #no javaArguments found, so create it
        echo "no javaArguments found in $file, so creating it..."
        sed -i 's?  "launcher": {?  "launcher": {\n    "javaArguments": "-Dorg.lwjgl.librarypath='$HOME'/lwjgl2arm32 -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M",?g' "$file"
      fi
    fi
  done
  IFS="$PREIFS"
  
  sleep 10
done