mirror of
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295 lines
10 KiB
Python
295 lines
10 KiB
Python
#!/usr/bin/env python
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"""Script to check if PR is mergeable and merge it"""
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import argparse
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import logging
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from datetime import datetime
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from os import getenv
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from pprint import pformat
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from typing import Dict, List
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from github.PaginatedList import PaginatedList
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from github.PullRequestReview import PullRequestReview
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from github.WorkflowRun import WorkflowRun
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from commit_status_helper import get_commit_filtered_statuses
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from get_robot_token import get_best_robot_token
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from github_helper import GitHub, NamedUser, PullRequest, Repository
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from pr_info import PRInfo
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# The team name for accepted approvals
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TEAM_NAME = getenv("GITHUB_TEAM_NAME", "core")
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class Reviews:
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STATES = ["CHANGES_REQUESTED", "APPROVED"]
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def __init__(self, pr: PullRequest):
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"""The reviews are proceed in the next logic:
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- if review for an author does not exist, set it
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- the review status can be changed from CHANGES_REQUESTED and APPROVED
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only to either one
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"""
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logging.info("Checking the PR for approvals")
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self.pr = pr
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reviews = pr.get_reviews()
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# self.reviews is a dict of latest CHANGES_REQUESTED or APPROVED review
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# per user
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# NamedUsed has proper __eq__ and __hash__, so it's safe to use it
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self.reviews = {} # type: Dict[NamedUser, PullRequestReview]
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for r in reviews:
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user = r.user
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if not self.reviews.get(user):
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self.reviews[user] = r
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continue
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# Do not process other statuses than STATES for existing user keys
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if r.state not in self.STATES:
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continue
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# If the user has a status other than STATES, we overwrite it by a
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# review w/ a proper state w/o checking the date
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if self.reviews[user].state not in self.STATES:
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self.reviews[user] = r
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continue
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# Keep the latest review per user
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if self.reviews[user].submitted_at < r.submitted_at:
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self.reviews[user] = r
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def is_approved(self, team: List[NamedUser]) -> bool:
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"""Checks if the PR is approved, and no changes made after the last approval"""
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if not self.reviews:
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logging.info("There aren't reviews for PR #%s", self.pr.number)
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return False
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logging.info(
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"The following users have reviewed the PR:\n %s",
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"\n ".join(
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f"{user.login}: {review.state}" for user, review in self.reviews.items()
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),
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)
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filtered_reviews = {
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user: review
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for user, review in self.reviews.items()
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if review.state in self.STATES and user in team
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}
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# We consider reviews only from the given list of users
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changes_requested = {
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user: review
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for user, review in filtered_reviews.items()
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if review.state == "CHANGES_REQUESTED"
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}
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if changes_requested:
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logging.info(
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"The following users requested changes for the PR: %s",
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", ".join(user.login for user in changes_requested.keys()),
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)
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return False
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approved = {
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user: review
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for user, review in filtered_reviews.items()
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if review.state == "APPROVED"
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}
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if not approved:
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logging.info(
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"The PR #%s is not approved by any of %s team member",
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self.pr.number,
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TEAM_NAME,
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)
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return False
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logging.info(
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"The following users from %s team approved the PR: %s",
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TEAM_NAME,
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", ".join(user.login for user in approved.keys()),
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)
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# The only reliable place to get the 100% accurate last_modified
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# info is when the commit was pushed to GitHub. The info is
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# available as a header 'last-modified' of /{org}/{repo}/commits/{sha}.
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# Unfortunately, it's formatted as 'Wed, 04 Jan 2023 11:05:13 GMT'
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commit = self.pr.head.repo.get_commit(self.pr.head.sha)
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if commit.stats.last_modified is None:
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logging.warning("Unable to get info about the commit %s", self.pr.head.sha)
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return False
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last_changed = datetime.strptime(
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commit.stats.last_modified, "%a, %d %b %Y %H:%M:%S GMT"
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)
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logging.info("The PR is changed at %s", last_changed.isoformat())
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approved_at = max(review.submitted_at for review in approved.values())
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if approved_at == datetime.fromtimestamp(0):
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logging.info(
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"Unable to get `datetime.fromtimestamp(0)`, "
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"here's debug info about reviews: %s",
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"\n".join(pformat(review) for review in self.reviews.values()),
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)
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else:
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logging.info("The PR is approved at %s", approved_at.isoformat())
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if approved_at < last_changed:
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logging.info(
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"There are changes done at %s after approval at %s",
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last_changed.isoformat(),
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approved_at.isoformat(),
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)
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return False
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return True
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def get_workflows_for_head(repo: Repository, head_sha: str) -> List[WorkflowRun]:
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# The monkey-patch until the PR is merged:
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# https://github.com/PyGithub/PyGithub/pull/2408
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return list(
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PaginatedList(
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WorkflowRun,
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repo._requester, # pylint:disable=protected-access
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f"{repo.url}/actions/runs",
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{"head_sha": head_sha},
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list_item="workflow_runs",
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)
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)
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def parse_args() -> argparse.Namespace:
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pr_info = PRInfo()
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parser = argparse.ArgumentParser(
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formatter_class=argparse.ArgumentDefaultsHelpFormatter,
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description="Script to merge the given PR. Additional checks for approved "
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"status and green commit statuses could be done",
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)
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parser.add_argument(
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"--dry-run",
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action="store_true",
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help="if set, the script won't merge the PR, just check the conditions",
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)
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parser.add_argument(
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"--check-approved",
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action="store_true",
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help="if set, checks that the PR is approved and no changes required",
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)
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parser.add_argument(
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"--check-running-workflows", default=True, help=argparse.SUPPRESS
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)
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parser.add_argument(
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"--no-check-running-workflows",
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dest="check_running_workflows",
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action="store_false",
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default=argparse.SUPPRESS,
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help="(dangerous) if set, skip checking for running workflows for the PR head",
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)
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parser.add_argument("--check-green", default=True, help=argparse.SUPPRESS)
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parser.add_argument(
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"--no-check-green",
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dest="check_green",
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action="store_false",
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default=argparse.SUPPRESS,
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help="(dangerous) if set, skip check commit to having all green statuses",
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)
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parser.add_argument(
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"--repo",
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default=pr_info.repo_full_name,
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help="PR number to check",
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)
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parser.add_argument(
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"--pr",
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type=int,
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default=pr_info.number,
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help="PR number to check",
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)
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parser.add_argument(
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"--token",
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type=str,
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default="",
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help="a token to use for GitHub API requests, will be received from SSM "
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"if empty",
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)
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args = parser.parse_args()
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args.pr_info = pr_info
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return args
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def main():
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logging.basicConfig(level=logging.INFO, format="%(asctime)s %(message)s")
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args = parse_args()
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logging.info("Going to process PR #%s in repo %s", args.pr, args.repo)
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token = args.token or get_best_robot_token()
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gh = GitHub(token)
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repo = gh.get_repo(args.repo)
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# An ugly and not nice fix to patch the wrong organization URL,
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# see https://github.com/PyGithub/PyGithub/issues/2395#issuecomment-1378629710
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# pylint: disable=protected-access
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repo.organization._url.value = repo.organization.url.replace( # type: ignore
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"/users/", "/orgs/", 1
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)
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# pylint: enable=protected-access
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pr = repo.get_pull(args.pr)
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if pr.is_merged():
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logging.info("The PR #%s is already merged", pr.number)
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return
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not_ready_to_merge = pr.draft or "WIP" in pr.title
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if not_ready_to_merge:
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logging.info("The PR #%s is not ready for merge, stopping", pr.number)
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return
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if args.check_running_workflows:
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workflows = get_workflows_for_head(repo, pr.head.sha)
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logging.info(
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"The PR #%s has following workflows:\n%s",
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pr.number,
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"\n".join(f"{wf.html_url}: status is {wf.status}" for wf in workflows),
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)
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workflows_in_progress = [wf for wf in workflows if wf.status != "completed"]
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# At most one workflow in progress is fine. We check that there no
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# cases like, e.g. PullRequestCI and DocksCheck in progress at once
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if len(workflows_in_progress) > 1:
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logging.info(
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"The PR #%s has more than one workflows in progress, check URLs:\n%s",
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pr.number,
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"\n".join(wf.html_url for wf in workflows_in_progress),
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)
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return
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if args.check_green:
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logging.info("Checking that all PR's statuses are green")
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commit = repo.get_commit(pr.head.sha)
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failed_statuses = [
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status.context
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for status in get_commit_filtered_statuses(commit)
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if status.state != "success"
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]
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if failed_statuses:
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logging.warning(
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"Some statuses aren't success:\n %s", ",\n ".join(failed_statuses)
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)
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return
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if args.check_approved:
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reviews = Reviews(pr)
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team = repo.organization.get_team_by_slug(TEAM_NAME)
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members = list(team.get_members())
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if not reviews.is_approved(members):
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logging.warning("We don't merge the PR")
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return
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logging.info("Merging the PR")
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if not args.dry_run:
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pr.merge()
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if __name__ == "__main__":
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main()
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