yt-dlp/devscripts/make_changelog.py

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from __future__ import annotations
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# Allow direct execution
import os
import sys
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import enum
import itertools
import json
import logging
import re
from collections import defaultdict
from dataclasses import dataclass
from functools import lru_cache
from pathlib import Path
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from devscripts.utils import read_file, run_process, write_file
BASE_URL = 'https://github.com'
LOCATION_PATH = Path(__file__).parent
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HASH_LENGTH = 7
logger = logging.getLogger(__name__)
class CommitGroup(enum.Enum):
PRIORITY = 'Important'
CORE = 'Core'
EXTRACTOR = 'Extractor'
DOWNLOADER = 'Downloader'
POSTPROCESSOR = 'Postprocessor'
NETWORKING = 'Networking'
MISC = 'Misc.'
@classmethod
@lru_cache
def subgroup_lookup(cls):
return {
name: group
for group, names in {
cls.CORE: {
'aes',
'cache',
'compat_utils',
'compat',
'cookies',
'dependencies',
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'formats',
'jsinterp',
'outtmpl',
'plugins',
'update',
'utils',
},
cls.MISC: {
'build',
'cleanup',
'devscripts',
'docs',
'test',
},
cls.NETWORKING: {
'rh',
},
}.items()
for name in names
}
@classmethod
@lru_cache
def group_lookup(cls):
result = {
'fd': cls.DOWNLOADER,
'ie': cls.EXTRACTOR,
'pp': cls.POSTPROCESSOR,
'upstream': cls.CORE,
}
result.update({item.name.lower(): item for item in iter(cls)})
return result
@classmethod
def get(cls, value: str) -> tuple[CommitGroup | None, str | None]:
group, _, subgroup = (group.strip().lower() for group in value.partition('/'))
result = cls.group_lookup().get(group)
if not result:
if subgroup:
return None, value
subgroup = group
result = cls.subgroup_lookup().get(subgroup)
return result, subgroup or None
@dataclass
class Commit:
hash: str | None
short: str
authors: list[str]
def __str__(self):
result = f'{self.short!r}'
if self.hash:
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result += f' ({self.hash[:HASH_LENGTH]})'
if self.authors:
authors = ', '.join(self.authors)
result += f' by {authors}'
return result
@dataclass
class CommitInfo:
details: str | None
sub_details: tuple[str, ...]
message: str
issues: list[str]
commit: Commit
fixes: list[Commit]
def key(self):
return ((self.details or '').lower(), self.sub_details, self.message)
def unique(items):
return sorted({item.strip().lower(): item for item in items if item}.values())
class Changelog:
MISC_RE = re.compile(r'(?:^|\b)(?:lint(?:ing)?|misc|format(?:ting)?|fixes)(?:\b|$)', re.IGNORECASE)
ALWAYS_SHOWN = (CommitGroup.PRIORITY,)
def __init__(self, groups, repo, collapsible=False):
self._groups = groups
self._repo = repo
self._collapsible = collapsible
def __str__(self):
return '\n'.join(self._format_groups(self._groups)).replace('\t', ' ')
def _format_groups(self, groups):
first = True
for item in CommitGroup:
if self._collapsible and item not in self.ALWAYS_SHOWN and first:
first = False
yield '\n<details><summary><h3>Changelog</h3></summary>\n'
group = groups[item]
if group:
yield self.format_module(item.value, group)
if self._collapsible:
yield '\n</details>'
def format_module(self, name, group):
result = f'\n#### {name} changes\n' if name else '\n'
return result + '\n'.join(self._format_group(group))
def _format_group(self, group):
sorted_group = sorted(group, key=CommitInfo.key)
detail_groups = itertools.groupby(sorted_group, lambda item: (item.details or '').lower())
for _, items in detail_groups:
items = list(items)
details = items[0].details
if details == 'cleanup':
items = self._prepare_cleanup_misc_items(items)
prefix = '-'
if details:
if len(items) == 1:
prefix = f'- **{details}**:'
else:
yield f'- **{details}**'
prefix = '\t-'
sub_detail_groups = itertools.groupby(items, lambda item: tuple(map(str.lower, item.sub_details)))
for sub_details, entries in sub_detail_groups:
if not sub_details:
for entry in entries:
yield f'{prefix} {self.format_single_change(entry)}'
continue
entries = list(entries)
sub_prefix = f'{prefix} {", ".join(entries[0].sub_details)}'
if len(entries) == 1:
yield f'{sub_prefix}: {self.format_single_change(entries[0])}'
continue
yield sub_prefix
for entry in entries:
yield f'\t{prefix} {self.format_single_change(entry)}'
def _prepare_cleanup_misc_items(self, items):
cleanup_misc_items = defaultdict(list)
sorted_items = []
for item in items:
if self.MISC_RE.search(item.message):
cleanup_misc_items[tuple(item.commit.authors)].append(item)
else:
sorted_items.append(item)
for commit_infos in cleanup_misc_items.values():
sorted_items.append(CommitInfo(
'cleanup', ('Miscellaneous',), ', '.join(
self._format_message_link(None, info.commit.hash)
for info in sorted(commit_infos, key=lambda item: item.commit.hash or '')),
[], Commit(None, '', commit_infos[0].commit.authors), []))
return sorted_items
def format_single_change(self, info: CommitInfo):
message, sep, rest = info.message.partition('\n')
if '[' not in message:
# If the message doesn't already contain markdown links, try to add a link to the commit
message = self._format_message_link(message, info.commit.hash)
if info.issues:
message = f'{message} ({self._format_issues(info.issues)})'
if info.commit.authors:
message = f'{message} by {self._format_authors(info.commit.authors)}'
if info.fixes:
fix_message = ', '.join(f'{self._format_message_link(None, fix.hash)}' for fix in info.fixes)
authors = sorted({author for fix in info.fixes for author in fix.authors}, key=str.casefold)
if authors != info.commit.authors:
fix_message = f'{fix_message} by {self._format_authors(authors)}'
message = f'{message} (With fixes in {fix_message})'
return message if not sep else f'{message}{sep}{rest}'
def _format_message_link(self, message, hash):
assert message or hash, 'Improperly defined commit message or override'
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message = message if message else hash[:HASH_LENGTH]
return f'[{message}]({self.repo_url}/commit/{hash})' if hash else message
def _format_issues(self, issues):
return ', '.join(f'[#{issue}]({self.repo_url}/issues/{issue})' for issue in issues)
@staticmethod
def _format_authors(authors):
return ', '.join(f'[{author}]({BASE_URL}/{author})' for author in authors)
@property
def repo_url(self):
return f'{BASE_URL}/{self._repo}'
class CommitRange:
COMMAND = 'git'
COMMIT_SEPARATOR = '-----'
AUTHOR_INDICATOR_RE = re.compile(r'Authored by:? ', re.IGNORECASE)
MESSAGE_RE = re.compile(r'''
(?:\[(?P<prefix>[^\]]+)\]\ )?
(?:(?P<sub_details>`?[\w.-]+`?): )?
(?P<message>.+?)
(?:\ \((?P<issues>\#\d+(?:,\ \#\d+)*)\))?
''', re.VERBOSE | re.DOTALL)
EXTRACTOR_INDICATOR_RE = re.compile(r'(?:Fix|Add)\s+Extractors?', re.IGNORECASE)
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REVERT_RE = re.compile(r'(?:\[[^\]]+\]\s+)?(?i:Revert)\s+([\da-f]{40})')
FIXES_RE = re.compile(r'(?i:Fix(?:es)?(?:\s+bugs?)?(?:\s+in|\s+for)?|Revert)\s+([\da-f]{40})')
UPSTREAM_MERGE_RE = re.compile(r'Update to ytdl-commit-([\da-f]+)')
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def __init__(self, start, end, default_author=None):
self._start, self._end = start, end
self._commits, self._fixes = self._get_commits_and_fixes(default_author)
self._commits_added = []
def __iter__(self):
return iter(itertools.chain(self._commits.values(), self._commits_added))
def __len__(self):
return len(self._commits) + len(self._commits_added)
def __contains__(self, commit):
if isinstance(commit, Commit):
if not commit.hash:
return False
commit = commit.hash
return commit in self._commits
def _get_commits_and_fixes(self, default_author):
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result = run_process(
self.COMMAND, 'log', f'--format=%H%n%s%n%b%n{self.COMMIT_SEPARATOR}',
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f'{self._start}..{self._end}' if self._start else self._end).stdout
commits, reverts = {}, {}
fixes = defaultdict(list)
lines = iter(result.splitlines(False))
for i, commit_hash in enumerate(lines):
short = next(lines)
skip = short.startswith('Release ') or short == '[version] update'
authors = [default_author] if default_author else []
for line in iter(lambda: next(lines), self.COMMIT_SEPARATOR):
match = self.AUTHOR_INDICATOR_RE.match(line)
if match:
authors = sorted(map(str.strip, line[match.end():].split(',')), key=str.casefold)
commit = Commit(commit_hash, short, authors)
if skip and (self._start or not i):
logger.debug(f'Skipped commit: {commit}')
continue
elif skip:
logger.debug(f'Reached Release commit, breaking: {commit}')
break
revert_match = self.REVERT_RE.fullmatch(commit.short)
if revert_match:
reverts[revert_match.group(1)] = commit
continue
fix_match = self.FIXES_RE.search(commit.short)
if fix_match:
commitish = fix_match.group(1)
fixes[commitish].append(commit)
commits[commit.hash] = commit
for commitish, revert_commit in reverts.items():
reverted = commits.pop(commitish, None)
if reverted:
logger.debug(f'{commitish} fully reverted {reverted}')
else:
commits[revert_commit.hash] = revert_commit
for commitish, fix_commits in fixes.items():
if commitish in commits:
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hashes = ', '.join(commit.hash[:HASH_LENGTH] for commit in fix_commits)
logger.info(f'Found fix(es) for {commitish[:HASH_LENGTH]}: {hashes}')
for fix_commit in fix_commits:
del commits[fix_commit.hash]
else:
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logger.debug(f'Commit with fixes not in changes: {commitish[:HASH_LENGTH]}')
return commits, fixes
def apply_overrides(self, overrides):
for override in overrides:
when = override.get('when')
if when and when not in self and when != self._start:
logger.debug(f'Ignored {when!r} override')
continue
override_hash = override.get('hash') or when
if override['action'] == 'add':
commit = Commit(override.get('hash'), override['short'], override.get('authors') or [])
logger.info(f'ADD {commit}')
self._commits_added.append(commit)
elif override['action'] == 'remove':
if override_hash in self._commits:
logger.info(f'REMOVE {self._commits[override_hash]}')
del self._commits[override_hash]
elif override['action'] == 'change':
if override_hash not in self._commits:
continue
commit = Commit(override_hash, override['short'], override.get('authors') or [])
logger.info(f'CHANGE {self._commits[commit.hash]} -> {commit}')
self._commits[commit.hash] = commit
self._commits = {key: value for key, value in reversed(self._commits.items())}
def groups(self):
group_dict = defaultdict(list)
for commit in self:
upstream_re = self.UPSTREAM_MERGE_RE.search(commit.short)
if upstream_re:
commit.short = f'[upstream] Merged with youtube-dl {upstream_re.group(1)}'
match = self.MESSAGE_RE.fullmatch(commit.short)
if not match:
logger.error(f'Error parsing short commit message: {commit.short!r}')
continue
prefix, sub_details_alt, message, issues = match.groups()
issues = [issue.strip()[1:] for issue in issues.split(',')] if issues else []
if prefix:
groups, details, sub_details = zip(*map(self.details_from_prefix, prefix.split(',')))
group = next(iter(filter(None, groups)), None)
details = ', '.join(unique(details))
sub_details = list(itertools.chain.from_iterable(sub_details))
else:
group = CommitGroup.CORE
details = None
sub_details = []
if sub_details_alt:
sub_details.append(sub_details_alt)
sub_details = tuple(unique(sub_details))
if not group:
if self.EXTRACTOR_INDICATOR_RE.search(commit.short):
group = CommitGroup.EXTRACTOR
else:
group = CommitGroup.POSTPROCESSOR
logger.warning(f'Failed to map {commit.short!r}, selected {group.name.lower()}')
commit_info = CommitInfo(
details, sub_details, message.strip(),
issues, commit, self._fixes[commit.hash])
logger.debug(f'Resolved {commit.short!r} to {commit_info!r}')
group_dict[group].append(commit_info)
return group_dict
@staticmethod
def details_from_prefix(prefix):
if not prefix:
return CommitGroup.CORE, None, ()
prefix, *sub_details = prefix.split(':')
group, details = CommitGroup.get(prefix)
if group is CommitGroup.PRIORITY and details:
details = details.partition('/')[2].strip()
if details and '/' in details:
logger.error(f'Prefix is overnested, using first part: {prefix}')
details = details.partition('/')[0].strip()
if details == 'common':
details = None
elif group is CommitGroup.NETWORKING and details == 'rh':
details = 'Request Handler'
return group, details, sub_details
def get_new_contributors(contributors_path, commits):
contributors = set()
if contributors_path.exists():
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for line in read_file(contributors_path).splitlines():
author, _, _ = line.strip().partition(' (')
authors = author.split('/')
contributors.update(map(str.casefold, authors))
new_contributors = set()
for commit in commits:
for author in commit.authors:
author_folded = author.casefold()
if author_folded not in contributors:
contributors.add(author_folded)
new_contributors.add(author)
return sorted(new_contributors, key=str.casefold)
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser(
description='Create a changelog markdown from a git commit range')
parser.add_argument(
'commitish', default='HEAD', nargs='?',
help='The commitish to create the range from (default: %(default)s)')
parser.add_argument(
'-v', '--verbosity', action='count', default=0,
help='increase verbosity (can be used twice)')
parser.add_argument(
'-c', '--contributors', action='store_true',
help='update CONTRIBUTORS file (default: %(default)s)')
parser.add_argument(
'--contributors-path', type=Path, default=LOCATION_PATH.parent / 'CONTRIBUTORS',
help='path to the CONTRIBUTORS file')
parser.add_argument(
'--no-override', action='store_true',
help='skip override json in commit generation (default: %(default)s)')
parser.add_argument(
'--override-path', type=Path, default=LOCATION_PATH / 'changelog_override.json',
help='path to the changelog_override.json file')
parser.add_argument(
'--default-author', default='pukkandan',
help='the author to use without a author indicator (default: %(default)s)')
parser.add_argument(
'--repo', default='yt-dlp/yt-dlp',
help='the github repository to use for the operations (default: %(default)s)')
parser.add_argument(
'--collapsible', action='store_true',
help='make changelog collapsible (default: %(default)s)')
args = parser.parse_args()
logging.basicConfig(
datefmt='%Y-%m-%d %H-%M-%S', format='{asctime} | {levelname:<8} | {message}',
level=logging.WARNING - 10 * args.verbosity, style='{', stream=sys.stderr)
commits = CommitRange(None, args.commitish, args.default_author)
if not args.no_override:
if args.override_path.exists():
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overrides = json.loads(read_file(args.override_path))
commits.apply_overrides(overrides)
else:
logger.warning(f'File {args.override_path.as_posix()} does not exist')
logger.info(f'Loaded {len(commits)} commits')
new_contributors = get_new_contributors(args.contributors_path, commits)
if new_contributors:
if args.contributors:
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write_file(args.contributors_path, '\n'.join(new_contributors) + '\n', mode='a')
logger.info(f'New contributors: {", ".join(new_contributors)}')
print(Changelog(commits.groups(), args.repo, args.collapsible))