A python script to download the latest Paper MC build

update_papermc.py

#!/usr/bin/env python3

import pickle
import sys
import urllib.request
from shutil import move

import requests

"""
A python script to download the latest Paper MC build if it hasn't
been downloaded yet.

You'll need requests installed:

pip install requests
"""


VERSION = '1.15.2'

remote_build = int(requests.get(f"https://papermc.io/api/v1/paper/{VERSION}/latest").json()["build"])

try:
	with open('latest', 'rb') as latest:
		old_latest = pickle.load(latest)
except (FileNotFoundError, EOFError):
	old_latest = 0

if old_latest >= remote_build:
	print(f"Already up-to-date, build #{remote_build}")
	sys.exit(0)


try:
	move('server.jar', 'server_old.jar')
except FileNotFoundError:
	pass

download_url = f"https://papermc.io/api/v1/paper/{VERSION}/{remote_build}/download/"
print(f"Downloading {download_url}...")

r = requests.get(download_url)
with open('server.jar', 'wb+') as outfile:
	outfile.write(r.content)

with open('latest', 'wb+') as latest:
	pickle.dump(remote_build, latest)

print(f"Updated to build #{remote_build}")