250 lines
11 KiB
Python
Executable file
250 lines
11 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright 2019 Google LLC
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#
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# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://llvm.org/LICENSE.txt
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import json
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import os
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import re
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import socket
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import subprocess
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import time
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from typing import List, Optional, Tuple
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from phabricator import Phabricator
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from git import Repo, GitCommandError
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class ApplyPatch:
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"""Apply a diff from Phabricator on local working copy.
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This script is a rewrite of `arc patch` to accomodate for dependencies
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that have already landed, but could not be identified by `arc patch`.
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For a given diff_id, this class will get the dependencies listed on Phabricator.
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For each dependency D it will check the diff history:
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- if D has already landed, skip it.
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- If D has not landed, it will download the patch for D and try to apply it locally.
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Once this class has applied all dependencies, it will apply the diff itself.
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This script must be called from the root folder of a local checkout of
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https://github.com/llvm/llvm-project
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"""
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def __init__(self, diff_id: int, comment_file_path: str, token: str, url: str, git_hash: str):
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self.comment_file_path = comment_file_path
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self.conduit_token = token # type: Optional[str]
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self.host = url # type: Optional[str]
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self._load_arcrc()
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self.diff_id = diff_id # type: int
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if not self.host.endswith('/api/'):
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self.host += '/api/'
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self.phab = self._create_phab()
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self.base_revision = git_hash # type: Optional[str]
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self.msg = [] # type: List[str]
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self.repo = Repo(os.getcwd()) # type: Repo
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def _load_arcrc(self):
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"""Load arc configuration from file if not set."""
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if self.conduit_token is not None or self.host is not None:
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return
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print('Loading configuration from ~/.arcrc file')
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with open(os.path.expanduser('~/.arcrc'), 'r') as arcrc_file:
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arcrc = json.load(arcrc_file)
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# use the first host configured in the file
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self.host = next(iter(arcrc['hosts']))
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self.conduit_token = arcrc['hosts'][self.host]['token']
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def run(self):
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"""try to apply the patch from phabricator
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Write to `self.comment_file` for showing error messages on Phabricator.
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"""
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try:
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revision_id, dependencies, base_revision = self._get_dependencies(self.diff_id)
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dependencies.reverse() # Arrange deps in chronological order.
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if self.base_revision is not None:
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print('Using base revision provided by command line\n{} instead of resolved\n{}'.format(
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self.base_revision, base_revision))
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base_revision = self.base_revision
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print('Checking out {}...'.format(base_revision))
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try:
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self.repo.git.checkout(base_revision)
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except GitCommandError:
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print('ERROR checking out revision {}. It`s not in the '
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'repository. Using master instead.'.format(base_revision))
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self.repo.git.checkout('master')
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print('Revision is {}'.format(self.repo.head.commit.hexsha))
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print('git reset, git cleanup...')
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self.repo.git.reset('--hard')
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self.repo.git.clean('-fdx')
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print('Analyzing {}'.format(diff_to_str(revision_id)))
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if len(dependencies) > 0:
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print('This diff depends on: {}'.format(diff_list_to_str(dependencies)))
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missing, landed = self._get_missing_landed_dependencies(dependencies)
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print(' Already landed: {}'.format(diff_list_to_str(landed)))
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print(' Will be applied: {}'.format(diff_list_to_str(missing)))
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if missing:
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for revision in missing:
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self._apply_revision(revision)
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self.repo.config_writer().set_value("user", "name", "myusername").release()
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self.repo.config_writer().set_value("user", "email", "myemail@example.com").release()
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self.repo.git.commit('-a', '-m', 'dependencies')
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print('All depended diffs are applied')
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self._apply_diff(self.diff_id, revision_id)
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self.repo.git.add('-u', '.')
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print('done.')
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finally:
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self._write_error_message()
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def _create_phab(self):
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phab = Phabricator(token=self.conduit_token, host=self.host)
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try_call(lambda: phab.update_interfaces())
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return phab
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def _get_diff(self, diff_id: int):
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"""Get a diff from Phabricator based on it's diff id."""
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return try_call(lambda: self.phab.differential.getdiff(diff_id=diff_id))
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def _get_revision(self, revision_id: int):
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"""Get a revision from Phabricator based on its revision id."""
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return try_call(lambda: self.phab.differential.query(ids=[revision_id])[0])
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def _get_revisions(self, *, phids: List[str] = None):
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"""Get a list of revisions from Phabricator based on their PH-IDs."""
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if phids is None:
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raise Exception('_get_revisions phids is None')
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if not phids:
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# Handle an empty query locally. Otherwise the connection
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# will time out.
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return []
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return try_call(lambda: self.phab.differential.query(phids=phids))
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def _get_dependencies(self, diff_id) -> Tuple[int, List[int], str]:
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"""Get all dependencies for the diff.
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They are listed in reverse chronological order - from most recent to least recent."""
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print('Getting dependencies of {}'.format(diff_id))
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diff = self._get_diff(diff_id)
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revision_id = int(diff.revisionID)
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revision = self._get_revision(revision_id)
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base_revision = diff['sourceControlBaseRevision']
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if base_revision is None or len(base_revision) == 0:
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base_revision = 'master'
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dependency_ids = revision['auxiliary']['phabricator:depends-on']
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revisions = self._get_revisions(phids=dependency_ids)
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result = []
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# Recursively resolve dependencies of those diffs.
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for r in revisions:
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_, sub, _ = self._get_dependencies(r['diffs'][0])
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result.append(r['id'])
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result.extend(sub)
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return revision_id, result, base_revision
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def _apply_diff(self, diff_id: int, revision_id: int):
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"""Download and apply a diff to the local working copy."""
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print('Applying diff {} for revision {}...'.format(diff_id, diff_to_str(revision_id)))
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# TODO: print diff or URL to it
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diff = try_call(lambda: self.phab.differential.getrawdiff(diffID=str(diff_id)).response)
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proc = subprocess.run('patch -p1', input=diff, shell=True, text=True,
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stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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if proc.returncode != 0:
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raise Exception('Applying patch failed:\n{}'.format(proc.stdout + proc.stderr))
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def _apply_revision(self, revision_id: int):
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"""Download and apply the latest diff of a revision to the local working copy."""
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revision = self._get_revision(revision_id)
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# take the diff_id with the highest number, this should be latest one
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diff_id = max(revision['diffs'])
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self._apply_diff(diff_id, revision_id)
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def _write_error_message(self):
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"""Write the log message to a file."""
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if self.comment_file_path is None:
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return
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if len(self.msg) == 0:
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return
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print('writing error message to {}'.format(self.comment_file_path))
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with open(self.comment_file_path, 'a') as comment_file:
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text = '\n\n'.join(self.msg)
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comment_file.write(text)
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def _get_landed_revisions(self, limit: int = 1000):
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"""Get list of landed revisions from current git branch."""
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diff_regex = re.compile(r'^Differential Revision: https:\/\/reviews\.llvm\.org\/(.*)$', re.MULTILINE)
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earliest_commit = None
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rev = self.base_revision
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if rev is None:
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rev = 'master'
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for commit in self.repo.iter_commits(rev, max_count=limit):
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earliest_commit = commit
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result = diff_regex.search(commit.message)
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if result is not None:
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yield result.group(1)
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if earliest_commit is not None:
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print('Earliest analyzed commit in history', earliest_commit.hexsha, earliest_commit.committed_datetime)
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return
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def _get_missing_landed_dependencies(self, dependencies: List[int]) -> Tuple[List[int], List[int]]:
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"""Check which of the dependencies have already landed on the current branch."""
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landed_deps = []
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missing_deps = []
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for dependency in dependencies:
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if diff_to_str(dependency) in self._get_landed_revisions():
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landed_deps.append(dependency)
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else:
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missing_deps.append(dependency)
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return missing_deps, landed_deps
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def diff_to_str(diff: int) -> str:
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"""Convert a diff id to a string with leading "D"."""
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return 'D{}'.format(diff)
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def diff_list_to_str(diffs: List[int]) -> str:
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"""Convert list of diff ids to a comma separated list, prefixed with "D"."""
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return ', '.join([diff_to_str(d) for d in diffs])
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def try_call(call):
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"""Tries to call function several times retrying on socked.timeout."""
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c = 0
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while True:
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try:
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return call()
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except socket.timeout as e:
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c += 1
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if c > 5:
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print('Connection to Pharicator failed, giving up: {}'.format(e))
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raise
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print('Connection to Pharicator failed, retrying: {}'.format(e))
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time.sleep(c * 10)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description='Apply Phabricator patch to working directory.')
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parser.add_argument('diff_id', type=int)
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# TODO: instead of --comment-file use stdout / stderr.
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parser.add_argument('--comment-file', type=str, dest='comment_file_path', default=None)
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parser.add_argument('--token', type=str, default=None, help='Conduit API token')
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parser.add_argument('--url', type=str, default=None, help='Phabricator URL')
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parser.add_argument('--commit', dest='commit', type=str, default=None,
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help='Use this commit as a base. By default tool tries to pick the base commit itself')
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args = parser.parse_args()
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patcher = ApplyPatch(args.diff_id, args.comment_file_path, args.token, args.url, args.commit)
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patcher.run()
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