download xcode bash script

get_xcode.sh

#!/bin/bash                
# This script downloads xcode at a speed of your choice so that you still have usable internet.
# Requires an Apple Developer account.
# 
# command to schedule 'script' to run at 'time' using 'at' util
# at <time> -f <script>    

getFile () {
  # -O use the same filename as the url, -C - resume download from end of partial file, set max 300kbps download rate
  params="-O -C - --limit-rate 300k"
  # To get the download link for xcode:
  # 1. Login to your Apple Developer account and open https://developer.apple.com/download/more/
  # 2. find the latest xcode in the table and click '+'
  # 3. open up browser devtools > network tab 
  # 4. back in the table, click the 'Xcode x.xx.xip' link then cancel the download box
  # 5. in devtools, right click the download request > copy > copy curl link
  # 6. paste the link below (it's really long) and append `$params`. eg. `curl ... $params`
}

# curl quits several times during download with exit code 18 (dunno why) so just resume the download
# if that happens
# code 56 is a network disconnect so let's wait longer for it to reconnect
exit_code=18
while [ "$exit_code" == 18 ] || [ "$exit_code" == 56 ]; do
  getFile
  exit_code=$?
  if [ "$exit_code" == 18 ]; then
    sleep 5
  else
    sleep 60
  fi
done