new_contents: import argparse
  import subprocess
  import os
  from github import Github
  import re
  
  g = Github(os.environ["GITHUB_TOKEN"])
  parser = argparse.ArgumentParser(description="Return the URL of a font's latest release artefact")
  parser.add_argument('--user', help='the repository username', default="notofonts")
  parser.add_argument('--repo', help='the repository name')
  parser.add_argument('family', help='the font family name')
  args = parser.parse_args()
  
  if not (args.user and args.repo):
      repo_url = subprocess.check_output(["git", "remote", "get-url", "origin"]).decode("utf8").strip()
      url_split = repo_url.split("/")
      args.user, args.repo = url_split[3], url_split[4]
  repo = g.get_repo(args.user + '/' + args.repo)
  
  for release in repo.get_releases():
      m = re.match(r"^(.*)-(v[\d.]+)", release.tag_name)
      if not m:
          print(f"Unparsable release {release.tag_name} in {repo_name}")
          continue
      family, version = m[1], m[2]
      if family != args.family:
          continue
      assets = release.get_assets()
      download_url = assets[0].browser_download_url
      print(f"::set-output name=version::{version}")
      print(f"::set-output name=url::{download_url}")
      break
  
subject: Add another module useful for GitHub actions: get a repo's latest release URL