#!/bin/python3

from ups import log
import ups


def check(dir=".") -> bool:
    try:
        us = ups.upstream(dir=dir)
    except Exception as e:
        log.fail("failed to create ups upstream", exception=e)
        return False

    try:
        commits = us.last()
    except Exception as e:
        log.fail("failed to get commits: %s" % e)
        return False

    if len(commits) == 0:
        log.info("upstream does not have any commits")
        return True

    last_commit = commits[0]
    saved_commit = us.commit()

    if saved_commit == "":
        log.warn("no commit specified, assuming we are on the latest commit")
        us.commit(last_commit)
        return False

    if saved_commit == last_commit:
        log.info("up-to-date with the upstream")
        return True

    commits = us.until(saved_commit)
    log.warn("%d commits behind the upstream" % len(commits))
    log.info("run ups-update to pull & apply patches")
    return False


if "__main__" == __name__:
    exit(0 if check() else 1)