code: def check_checkout_matches_remote(
      config: Config, system: System
  ) -> ActionReturn:
      try:
          system.run("git remote update")
          local = system.run("git rev-parse @")
          remote = system.run("git rev-parse @{u}")
          base = system.run("git merge-base @ @{u}")
          if local == remote:
              return PASSED("Checkout is up to date with GitHub")
          else:
              if local == base:
                  status = "NEED TO PULL"
              elif remote == base:
                  status = "NEED TO PUSH"
              else:
                  status = "DIVERGED"
              return FAILED(
                  f"Checkout is NOT up to date with GitHub ({status})"
              )
      except RuntimeError as e:
          return FAILED(
              "Could not check whether local and GitHub are up to date",
              details=e.args,
          )
  
imports: from __future__ import annotations
  import json
  import os
  from pathlib import Path
  from packaging.version import Version
  from .action import FAILED, PASSED, ActionReturn
  from .config import Config
  from .pipeline import StepType
  from .system import System
  from .util import skip_for_prerelease
label_desc: Use image node_id 6 for calling a global function with example usage: check_checkout_matches_remote(config, system) and returns: PASSED, FAILED, FAILED