recreate-dependabot-pr

#!/usr/bin/python3

# This file is part of Cockpit.
#
# Copyright (C) 2024 Red Hat, Inc.
#
# Cockpit is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# Cockpit is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Cockpit; If not, see <http://www.gnu.org/licenses/>.

# Update COCKPIT_REPO_COMMIT to cockpit HEAD automatically, defaults to
# Makefile as input optionally the full path can be provided. (For example
# Anaconda uses ui/webui/Makefile.am).

import os
import sys
import time
from typing import Optional

import task
from lib.aio.jsonutil import get_dict, get_int, get_str

sys.dont_write_bytecode = True


def main() -> None:
    assert os.getenv('GITHUB_BASE') is not None, 'GITHUB_BASE must be set'

    api = task.github.GitHub()
    for pull in api.pulls(state="open"):
        number = get_int(pull, 'number')
        if number is None:
            continue

        user = get_dict(pull, 'user')
        if get_str(user, 'login') != 'dependabot[bot]':
            continue

        pull_details = api.get(f'pulls/{number}')

        # Ignore dependabot PR's with multiple commits, they might be work in progress.
        if get_int(pull_details, 'commits') > 1:
            print(f'Skipping pull {number}, it is being worked on')
            continue

        mergeable: Optional[bool] = pull_details['mergeable']
        # State is unknown, retry with a timeout
        if mergeable is None:
            for retry in range(5):
                pull_details = api.get(f'pulls/{number}')
                mergeable = pull_details['mergeable']
                if mergeable is not None:
                    break

                print(f'Retrying to obtain mergeable status for pull={number}, retry={retry}')
                time.sleep(60)
            else:
                print(f'Reached timeout mergeable status still unknown for pull={number}')
                return

        if mergeable:
            print(f'Skipping pull {number}, it is in a mergeable state')
            continue
        else:
            # Not mergeable and a dependabot PR, add a `node_modules` label and re-create the PR.
            task.label(pull_details, ('node_modules',))  # type: ignore[no-untyped-call]

            # Stop at the first dependabot PR as we can only land one at a time.
            break


if __name__ == '__main__':
    main()