383 lines
16 KiB
Python
383 lines
16 KiB
Python
#!/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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# generate statistics on the llvm github repository
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import csv
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import datetime
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import git
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import re
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import os
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from typing import Dict, Optional, List, Set
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import random
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import string
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REVISION_REGEX = re.compile(
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r'^Differential Revision: https://reviews\.llvm\.org/(.*)$',
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re.MULTILINE)
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REVERT_REGEX = re.compile(r'^Revert "(.+)"')
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class MyCommit:
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SALT = ''.join(random.choices(
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string.ascii_lowercase + string.ascii_uppercase + string.digits, k=16))
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def __init__(self, commit: git.Commit):
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self.commit = commit
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self.chash = commit.hexsha # type: str
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self.author = hash(commit.author.email + MyCommit.SALT) # type: int
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self.author_domain = commit.author.email.rsplit("@")[-1].lower() # type: str
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self.commiter = hash(commit.committer.email.lower() + MyCommit.SALT) # type:int
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self.summary = commit.summary # type: str
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self.date = datetime.datetime.fromtimestamp(
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commit.committed_date) # type: datetime.datetime
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self.phab_revision = self._get_revision(commit) # type: Optional[str]
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self.reverts = None # type: Optional[MyCommit]
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self.reverted_by = None # type: Optional[MyCommit]
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self._diff_index = None # type: Optional[git.DiffIndex]
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@staticmethod
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def _get_revision(commit: git.Commit) -> Optional[str]:
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m = REVISION_REGEX.search(commit.message)
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if m is None:
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return None
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return m.group(1)
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@property
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def day(self) -> datetime.date:
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return self.date.date()
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def reverts_summary(self) -> Optional[str]:
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m = REVERT_REGEX.search(self.summary)
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if m is None:
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return None
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return m.group(1)
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def __str__(self):
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return self.chash
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@property
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def was_reverted(self) -> bool:
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return self.reverted_by is not None
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@property
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def was_reviewed(self) -> bool:
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return self.phab_revision is not None
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@property
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def is_revert(self) -> bool:
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return self.reverts is not None
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@property
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def week(self) -> str:
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return '{}-w{:02d}'.format(self.date.year, self.date.isocalendar()[1])
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@property
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def diff_index(self) -> git.DiffIndex:
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# expensive operation, cache the results
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if self._diff_index is None:
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self._diff_index = self.commit.diff(self.commit.parents[0], create_patch=True)
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return self._diff_index
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@property
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def num_loc(self) -> int:
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nloc = 0
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for diff in self.diff_index:
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nloc += str(diff.diff, encoding='utf8').count('\n')
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return nloc
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@property
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def modified_paths(self) -> Set[str]:
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result = set(d.b_path for d in self.diff_index if d.b_path is not None)
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result.update(d.a_path for d in self.diff_index if d.a_path is not None)
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return result
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@property
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def modified_projects(self) -> Set[str]:
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return set(p.split('/')[0] for p in self.modified_paths)
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class RepoStats:
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def __init__(self, git_dir: str):
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self.repo = git.Repo(git_dir)
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self.commit_by_hash = dict() # type: Dict[str, MyCommit]
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self.commit_by_summary = dict() # type: Dict[str, List[MyCommit]]
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self.commit_by_week = dict() # type: Dict[str, List[MyCommit]]
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self.commit_by_author = dict() # type: Dict[int, List[MyCommit]]
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self.commit_by_author_domain = dict() # type: Dict[str, List[MyCommit]]
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def parse_repo(self, maxage: datetime.datetime):
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for commit in self.repo.iter_commits('master'):
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if commit.committed_datetime < maxage:
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break
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mycommit = MyCommit(commit)
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self.commit_by_hash[mycommit.chash] = mycommit
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self.commit_by_summary.setdefault(mycommit.summary, [])\
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.append(mycommit)
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self.commit_by_week.setdefault(mycommit.week, []).append(mycommit)
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self.commit_by_author.setdefault(mycommit.author, [])\
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.append(mycommit)
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self.commit_by_author_domain.setdefault(mycommit.author_domain, []) \
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.append(mycommit)
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print('Read {} commits'.format(len(self.commit_by_hash)))
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def find_reverts(self):
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reverts = 0
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for commit in self.commit_by_hash.values():
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summary = commit.reverts_summary()
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if summary is None:
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continue
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if summary not in self.commit_by_summary:
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print('summary not found: {}'.format(summary))
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continue
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reverting_commit = self.commit_by_summary[summary][-1]
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commit.reverted_by = reverting_commit
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reverting_commit.reverts = commit
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reverts += 1
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print('Found {} reverts'.format(reverts))
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# https://stackoverflow.com/questions/2600775/how-to-get-week-number-in-python
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def dump_daily_stats(self):
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fieldnames = ["week", "num_commits", "num_reverts", "percentage_reverts",
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"num_reviewed", "percentage_reviewed",
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"# reviewed & revert", "# !reviewed & !revert", "# !reviewed & revert", "# reviewed & !revert"]
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csvfile = open('tmp/llvm-project-weekly.csv', 'w')
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writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
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dialect=csv.excel)
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writer.writeheader()
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for week in sorted(self.commit_by_week.keys()):
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commits = self.commit_by_week[week]
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num_commits = len(commits)
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num_reverts = len([c for c in commits if c.is_revert])
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percentage_reverts = 100.0*num_reverts / num_commits
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num_reviewed = len([c for c in commits if c.was_reviewed])
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percentage_reviewed = 100*num_reviewed / (num_commits - num_reverts)
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num_reviewed_revert = len([c for c in commits if c.was_reviewed and c.is_revert])
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num_reviewed_nrevert = len([c for c in commits if c.was_reviewed and not c.is_revert])
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num_nreviewed_nrevert = len([c for c in commits if not c.was_reviewed and not c.is_revert])
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num_nreviewed_revert = len([c for c in commits if not c.was_reviewed and c.is_revert])
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writer.writerow({
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"week": week,
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"num_commits": num_commits,
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"num_reverts": num_reverts,
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"percentage_reverts": percentage_reverts,
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"num_reviewed": num_reviewed,
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"percentage_reviewed": percentage_reviewed,
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"# reviewed & revert": num_reviewed_revert,
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"# !reviewed & !revert": num_nreviewed_nrevert,
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"# !reviewed & revert": num_nreviewed_revert,
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"# reviewed & !revert": num_reviewed_nrevert,
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})
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def dump_overall_stats(self):
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num_commits = len(self.commit_by_hash)
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num_reverts = len([c for c in self.commit_by_hash.values()
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if c.is_revert])
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print('Number of commits: {}'.format(num_commits))
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print('Number of reverts: {}'.format(num_reverts))
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print('percentage of reverts: {:0.2f}'.format(
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100*num_reverts / num_commits))
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num_reviewed = len([c for c in self.commit_by_hash.values()
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if c.was_reviewed])
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print('Number of reviewed commits: {}'.format(num_reviewed))
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print('percentage of reviewed commits: {:0.2f}'.format(
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100*num_reviewed / num_commits))
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num_reviewed_reverted = len([c for c in self.commit_by_hash.values()
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if c.was_reviewed and c.was_reverted])
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num_not_reviewed_reverted = len([c for c in self.commit_by_hash.values()
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if not c.was_reviewed and
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c.was_reverted])
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print('Number of reviewed that were reverted: {}'.format(num_reviewed_reverted))
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print('Number of NOT reviewed that were reverted: {}'.format(num_not_reviewed_reverted))
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print('percentage of reviewed that were reverted: {:0.2f}'.format(
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100*num_reviewed_reverted / num_reviewed))
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print('percentage of NOT reviewed that were reverted: {:0.2f}'.format(
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100*num_not_reviewed_reverted / (num_commits-num_reviewed)))
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num_foreign_committer = len([c for c in self.commit_by_hash.values()
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if c.author != c.commiter])
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print('Number of commits where author != committer: {}'.format(
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num_foreign_committer))
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print('Percentage of commits where author != committer: {:0.2f}'.format(
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100*num_foreign_committer/num_commits))
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def dump_author_stats(self):
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print('Number of authors: {}'.format(len(self.commit_by_author)))
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fieldnames = ["author", "num_commits", "num_reverts", "percentage_reverts",
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"num_reviewed", "percentage_reviewed"]
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csvfile = open('tmp/llvm-project-authors.csv', 'w')
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writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
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dialect=csv.excel)
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writer.writeheader()
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for author, commits in self.commit_by_author.items():
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num_commits = len(commits)
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num_reverts = len([c for c in commits if c.was_reverted])
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percentage_reverts = 100 * num_reverts / num_commits
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num_reviewed = len([c for c in commits if c.was_reviewed])
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percentage_reviewed = 100*num_reviewed / num_commits
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writer.writerow({
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"author": author,
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"num_commits": num_commits,
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"num_reverts": num_reverts,
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"percentage_reverts": percentage_reverts,
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"num_reviewed": num_reviewed,
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"percentage_reviewed": percentage_reviewed,
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})
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def dump_author_domain_stats(self):
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print('Number of authors: {}'.format(len(self.commit_by_author)))
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fieldnames = ["author_domain", "num_commits", "num_committers"]
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csvfile = open('tmp/llvm-project-author_domains.csv', 'w')
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writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
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dialect=csv.excel)
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writer.writeheader()
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for author_domain, commits in self.commit_by_author_domain.items():
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num_commits = len(commits)
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committers = set(c.author for c in commits)
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writer.writerow({
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"author_domain": author_domain,
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"num_commits": num_commits,
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"num_committers": len(committers),
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})
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def dump_unreviewed_paths(self, maxage: datetime.datetime):
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# TODO: this is really slow. Maybe parallelize?
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path_count = {
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True: {},
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False: {},
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} # type: Dict[bool, Dict[str, int]]
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for commit in self.repo.iter_commits('master'):
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if commit.committed_datetime < maxage:
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break
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mycommit = MyCommit(commit)
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for prefix in set(p.split('/')[0] for p in mycommit.modified_paths):
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path_count[mycommit.was_reviewed].setdefault(prefix, 0)
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path_count[mycommit.was_reviewed][prefix] += 1
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fieldnames = ['was_reviewed']
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all_paths = set(path_count[True].keys())
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all_paths.update(path_count[False].keys())
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fieldnames.extend(sorted(all_paths))
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csvfile = open('tmp/llvm-project-unreviewed-paths.csv', 'w')
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writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
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dialect=csv.excel)
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writer.writeheader()
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for reviewed in [True, False]:
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row = {'was_reviewed': reviewed}
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for path, count in path_count[reviewed].items():
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row[path] = count
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writer.writerow(row)
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csvfile.close()
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def dump_loc_commits(self, maxage: datetime.datetime):
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# TODO: this is really slow. Maybe parallelize?
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buckets = list(range(0, 2001, 100))
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review_dict = {
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True: {b: 0 for b in buckets},
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False: {b: 0 for b in buckets},
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} # type: Dict[bool, Dict[int, int]]
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reverted_dict = {
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True: {b: 0 for b in buckets},
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False: {b: 0 for b in buckets},
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} # type: Dict[bool, Dict[int, int]]
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for commit in self.repo.iter_commits('master'):
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if commit.committed_datetime < maxage:
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break
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mycommit = self.commit_by_hash[commit.hexsha]
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review_dict[mycommit.was_reviewed][self._find_bucket(mycommit.num_loc, buckets)] += 1
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reverted_dict[mycommit.was_reverted][self._find_bucket(mycommit.num_loc, buckets)] += 1
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fieldnames = ['was_reviewed']
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for i in range(0, len(buckets)-1):
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fieldnames.append('{}-{}'.format(buckets[i], buckets[i+1]-1))
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fieldnames.append('>={}'.format(buckets[-1]))
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csvfile = open('tmp/llvm-project-unreviewed-loc.csv', 'w')
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writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
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dialect=csv.excel)
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writer.writeheader()
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for reviewed in [True, False]:
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row = {'was_reviewed': reviewed}
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for i in range(0, len(buckets)):
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row[fieldnames[i+1]] = review_dict[reviewed][buckets[i]]
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writer.writerow(row)
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writer.writerow({'was_reviewed': 'reverted'})
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for reverted in [True, False]:
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row = {'was_reviewed': reverted}
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for i in range(0, len(buckets)):
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row[fieldnames[i+1]] = reverted_dict[reverted][buckets[i]]
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writer.writerow(row)
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csvfile.close()
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@staticmethod
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def _find_bucket(number: int, buckets: List[int]) -> int:
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for bucket in buckets:
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if number < bucket:
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return bucket
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return buckets[-1]
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def export_commits(self):
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print('starting export...')
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csvfile = open('tmp/llvm-project-export.csv', 'w')
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fieldnames = ['timestamp', 'hash', 'reviewed', 'was_reverted', 'is_revert', '# LOC changed',
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'modified projects', 'author domain', 'revision']
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writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
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dialect=csv.excel)
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writer.writeheader()
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# did not work with multiprocessing.map, gave recursion error from gitpython...
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# so using normal map function
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for row in map(_create_row, self.commit_by_hash.values()):
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writer.writerow(row)
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csvfile.close()
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def _create_row(mycommit: MyCommit) -> Dict:
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try:
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return {
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'timestamp': mycommit.date.isoformat(),
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'hash': mycommit.chash,
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'reviewed': mycommit.was_reviewed,
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'was_reverted': mycommit.was_reverted,
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'is_revert': mycommit.is_revert,
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'# LOC changed': mycommit.num_loc,
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'modified projects': (';'.join(mycommit.modified_projects)),
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'author domain': mycommit.author_domain,
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'revision': mycommit.phab_revision if mycommit.phab_revision is not None else "",
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}
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except Exception as e:
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print(e)
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return {}
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if __name__ == '__main__':
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max_age = datetime.datetime(year=2019, month=10, day=1,
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tzinfo=datetime.timezone.utc)
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now = datetime.datetime.now(tz=datetime.timezone.utc)
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rs = RepoStats(os.path.expanduser('~/git/llvm-project'))
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# TODO: make the path configurable, and `git clone/pull`
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rs.parse_repo(max_age)
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rs.find_reverts()
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rs.dump_daily_stats()
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rs.dump_overall_stats()
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rs.dump_author_stats()
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rs.dump_author_domain_stats()
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# disabled as it's quite slow
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# rs.dump_unreviewed_paths(now - datetime.timedelta(days=100))
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# rs.dump_loc_commits(now - datetime.timedelta(days=100))
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rs.export_commits()
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print('Done.')
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