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llvm-premerge-checks/scripts/metrics/repo_hist.py

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#!/usr/bin/env python3
# Copyright 2019 Google LLC
#
# Licensed under the the Apache License v2.0 with LLVM Exceptions (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://llvm.org/LICENSE.txt
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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# generate statistics on the llvm github repository
import csv
import datetime
import git
import re
import os
from typing import Dict, Optional, List
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import random
import string
REVISION_REGEX = re.compile(
r'^Differential Revision: https://reviews\.llvm\.org/(.*)$',
re.MULTILINE)
REVERT_REGEX = re.compile(r'^Revert "(.+)"')
class MyCommit:
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SALT = ''.join(random.choices(
string.ascii_lowercase + string.ascii_uppercase + string.digits, k=16))
def __init__(self, commit: git.Commit):
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
self.commiter = hash(commit.committer.email.lower() + MyCommit.SALT) # type:int
self.summary = commit.summary # type: str
self.date = datetime.datetime.fromtimestamp(
commit.committed_date) # type: datetime.datetime
self.phab_revision = self._get_revision(commit) # type: Optional[str]
self.reverts = None # type: Optional[MyCommit]
self.reverted_by = None # type: Optional[MyCommit]
@staticmethod
def _get_revision(commit: git.Commit) -> Optional[str]:
m = REVISION_REGEX.search(commit.message)
if m is None:
return None
return m.group(1)
@property
def day(self) -> datetime.date:
return self.date.date()
def reverts_summary(self) -> Optional[str]:
m = REVERT_REGEX.search(self.summary)
if m is None:
return None
return m.group(1)
def __str__(self):
return self.chash
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@property
def was_reverted(self) -> bool:
return self.reverted_by is not None
@property
def was_reviewed(self) -> bool:
return self.phab_revision is not None
@property
def is_revert(self) -> bool:
return self.reverts is not None
@property
def week(self) -> str:
return '{}-w{}'.format(self.date.year, self.date.isocalendar()[1])
class RepoStats:
def __init__(self):
self.commit_by_hash = dict() # type: Dict[str, MyCommit]
self.commit_by_summary = dict() # type: Dict[str, List[MyCommit]]
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self.commit_by_week = dict() # type: Dict[str, List[MyCommit]]
self.commit_by_author = dict() # type: Dict[int, List[MyCommit]]
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self.commit_by_author_domain = dict() # type: Dict[int, List[MyCommit]]
def parse_repo(self, git_dir: str, maxage: datetime.datetime):
repo = git.Repo(git_dir)
for commit in repo.iter_commits('master'):
if commit.committed_datetime < maxage:
break
mycommit = MyCommit(commit)
self.commit_by_hash[mycommit.chash] = mycommit
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self.commit_by_summary.setdefault(mycommit.summary, [])\
.append(mycommit)
self.commit_by_week.setdefault(mycommit.week, []).append(mycommit)
self.commit_by_author.setdefault(mycommit.author, [])\
.append(mycommit)
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self.commit_by_author_domain.setdefault(mycommit.author_domain, []) \
.append(mycommit)
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print('Read {} commits'.format(len(self.commit_by_hash)))
def find_reverts(self):
reverts = 0
for commit in self.commit_by_hash.values():
summary = commit.reverts_summary()
if summary is None:
continue
if summary not in self.commit_by_summary:
print('summary not found: {}'.format(summary))
continue
reverting_commit = self.commit_by_summary[summary][-1]
commit.reverted_by = reverting_commit
reverting_commit.reverts = commit
reverts += 1
print('Found {} reverts'.format(reverts))
# TODO: try weekly stats, they might be smoother
# https://stackoverflow.com/questions/2600775/how-to-get-week-number-in-python
def dump_daily_stats(self):
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fieldnames = ["week", "num_commits", "num_reverts", "percentage_reverts",
"num_reviewed", "percentage_reviewed"]
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csvfile = open('tmp/llvm-project-weekly.csv', 'w')
writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
dialect=csv.excel)
writer.writeheader()
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for week in sorted(self.commit_by_week.keys()):
commits = self.commit_by_week[week]
num_commits = len(commits)
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num_reverts = len([c for c in commits if c.is_revert])
percentage_reverts = 100.0*num_reverts / num_commits
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num_reviewed = len([c for c in commits if c.was_reviewed])
percentage_reviewed = 100*num_reviewed / (num_commits - num_reverts)
writer.writerow({
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"week": week,
"num_commits": num_commits,
"num_reverts": num_reverts,
"percentage_reverts": percentage_reverts,
"num_reviewed": num_reviewed,
"percentage_reviewed": percentage_reviewed,
})
def dump_overall_stats(self):
num_commits = len(self.commit_by_hash)
num_reverts = len([c for c in self.commit_by_hash.values()
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if c.is_revert])
print('Number of commits: {}'.format(num_commits))
print('Number of reverts: {}'.format(num_reverts))
print('percentage of reverts: {:0.2f}'.format(
100*num_reverts / num_commits))
num_reviewed = len([c for c in self.commit_by_hash.values()
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if c.was_reviewed])
print('Number of reviewed commits: {}'.format(num_reviewed))
print('percentage of reviewed commits: {:0.2f}'.format(
100*num_reviewed / num_commits))
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num_reviewed_reverted = len([c for c in self.commit_by_hash.values()
if c.was_reviewed and c.was_reverted])
num_not_reviewed_reverted = len([c for c in self.commit_by_hash.values()
if not c.was_reviewed and
c.was_reverted])
print('Number of reviewed that were reverted: {}'.format(num_reviewed_reverted))
print('Number of NOT reviewed that were reverted: {}'.format(num_not_reviewed_reverted))
print('percentage of reviewed that were reverted: {:0.2f}'.format(
100*num_reviewed_reverted / num_reviewed))
print('percentage of NOT reviewed that were reverted: {:0.2f}'.format(
100*num_not_reviewed_reverted / (num_commits-num_reviewed)))
num_foreign_committer = len([c for c in self.commit_by_hash.values()
if c.author != c.commiter])
print('Number of commits where author != committer: {}'.format(
num_foreign_committer))
print('Percentage of commits where author != committer: {:0.2f}'.format(
100*num_foreign_committer/num_commits))
def dump_author_stats(self):
print('Number of authors: {}'.format(len(self.commit_by_author)))
fieldnames = ["author", "num_commits", "num_reverts", "percentage_reverts",
"num_reviewed", "percentage_reviewed"]
csvfile = open('tmp/llvm-project-authors.csv', 'w')
writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
dialect=csv.excel)
writer.writeheader()
for author, commits in self.commit_by_author.items():
num_commits = len(commits)
num_reverts = len([c for c in commits if c.was_reverted])
percentage_reverts = 100 * num_reverts / num_commits
num_reviewed = len([c for c in commits if c.was_reviewed])
percentage_reviewed = 100*num_reviewed / num_commits
writer.writerow({
"author": author,
"num_commits": num_commits,
"num_reverts": num_reverts,
"percentage_reverts": percentage_reverts,
"num_reviewed": num_reviewed,
"percentage_reviewed": percentage_reviewed,
})
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def dump_author_domain_stats(self):
print('Number of authors: {}'.format(len(self.commit_by_author)))
fieldnames = ["author_domain", "num_commits", "num_committers"]
csvfile = open('tmp/llvm-project-author_domains.csv', 'w')
writer = csv.DictWriter(csvfile, fieldnames=fieldnames,
dialect=csv.excel)
writer.writeheader()
for author_domain, commits in self.commit_by_author_domain.items():
num_commits = len(commits)
committers = set(c.author for c in commits)
writer.writerow({
"author_domain": author_domain,
"num_commits": num_commits,
"num_committers": len(committers),
})
if __name__ == '__main__':
max_age = datetime.datetime(year=2019, month=10, day=1,
tzinfo=datetime.timezone.utc)
rs = RepoStats()
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# TODO: make the path configurable, and `git clone/pull`
rs.parse_repo(os.path.expanduser('~/git/llvm-project'), max_age)
rs.find_reverts()
rs.dump_daily_stats()
rs.dump_overall_stats()
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rs.dump_author_stats()
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rs.dump_author_domain_stats()