devscripts/make_changelog.py

   1 from __future__ import annotations
   2
   3 # Allow direct execution
   4 import os
   5 import sys
   6
   7 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
   8
   9 import enum
  10 import itertools
  11 import json
  12 import logging
  13 import re
  14 from collections import defaultdict
  15 from dataclasses import dataclass
  16 from functools import lru_cache
  17 from pathlib import Path
  18
  19 from devscripts.utils import read_file, run_process, write_file
  20
  21 BASE_URL = 'https://github.com'
  22 LOCATION_PATH = Path(__file__).parent
  23 HASH_LENGTH = 7
  24
  25 logger = logging.getLogger(__name__)
  26
  27
  28 class CommitGroup(enum.Enum):
  29     PRIORITY = 'Important'
  30     CORE = 'Core'
  31     EXTRACTOR = 'Extractor'
  32     DOWNLOADER = 'Downloader'
  33     POSTPROCESSOR = 'Postprocessor'
  34     NETWORKING = 'Networking'
  35     MISC = 'Misc.'
  36
  37     @classmethod
  38     @lru_cache
  39     def subgroup_lookup(cls):
  40         return {
  41             name: group
  42             for group, names in {
  43                 cls.MISC: {
  44                     'build',
  45                     'ci',
  46                     'cleanup',
  47                     'devscripts',
  48                     'docs',
  49                     'test',
  50                 },
  51                 cls.NETWORKING: {
  52                     'rh',
  53                 },
  54             }.items()
  55             for name in names
  56         }
  57
  58     @classmethod
  59     @lru_cache
  60     def group_lookup(cls):
  61         result = {
  62             'fd': cls.DOWNLOADER,
  63             'ie': cls.EXTRACTOR,
  64             'pp': cls.POSTPROCESSOR,
  65             'upstream': cls.CORE,
  66         }
  67         result.update({item.name.lower(): item for item in iter(cls)})
  68         return result
  69
  70     @classmethod
  71     def get(cls, value: str) -> tuple[CommitGroup | None, str | None]:
  72         group, _, subgroup = (group.strip().lower() for group in value.partition('/'))
  73
  74         result = cls.group_lookup().get(group)
  75         if not result:
  76             if subgroup:
  77                 return None, value
  78             subgroup = group
  79             result = cls.subgroup_lookup().get(subgroup)
  80
  81         return result, subgroup or None
  82
  83
  84 @dataclass
  85 class Commit:
  86     hash: str | None
  87     short: str
  88     authors: list[str]
  89
  90     def __str__(self):
  91         result = f'{self.short!r}'
  92
  93         if self.hash:
  94             result += f' ({self.hash[:HASH_LENGTH]})'
  95
  96         if self.authors:
  97             authors = ', '.join(self.authors)
  98             result += f' by {authors}'
  99
 100         return result
 101
 102
 103 @dataclass
 104 class CommitInfo:
 105     details: str | None
 106     sub_details: tuple[str, ...]
 107     message: str
 108     issues: list[str]
 109     commit: Commit
 110     fixes: list[Commit]
 111
 112     def key(self):
 113         return ((self.details or '').lower(), self.sub_details, self.message)
 114
 115
 116 def unique(items):
 117     return sorted({item.strip().lower(): item for item in items if item}.values())
 118
 119
 120 class Changelog:
 121     MISC_RE = re.compile(r'(?:^|\b)(?:lint(?:ing)?|misc|format(?:ting)?|fixes)(?:\b|$)', re.IGNORECASE)
 122     ALWAYS_SHOWN = (CommitGroup.PRIORITY,)
 123
 124     def __init__(self, groups, repo, collapsible=False):
 125         self._groups = groups
 126         self._repo = repo
 127         self._collapsible = collapsible
 128
 129     def __str__(self):
 130         return '\n'.join(self._format_groups(self._groups)).replace('\t', '    ')
 131
 132     def _format_groups(self, groups):
 133         first = True
 134         for item in CommitGroup:
 135             if self._collapsible and item not in self.ALWAYS_SHOWN and first:
 136                 first = False
 137                 yield '\n<details><summary><h3>Changelog</h3></summary>\n'
 138
 139             group = groups[item]
 140             if group:
 141                 yield self.format_module(item.value, group)
 142
 143         if self._collapsible:
 144             yield '\n</details>'
 145
 146     def format_module(self, name, group):
 147         result = f'\n#### {name} changes\n' if name else '\n'
 148         return result + '\n'.join(self._format_group(group))
 149
 150     def _format_group(self, group):
 151         sorted_group = sorted(group, key=CommitInfo.key)
 152         detail_groups = itertools.groupby(sorted_group, lambda item: (item.details or '').lower())
 153         for _, items in detail_groups:
 154             items = list(items)
 155             details = items[0].details
 156
 157             if details == 'cleanup':
 158                 items = self._prepare_cleanup_misc_items(items)
 159
 160             prefix = '-'
 161             if details:
 162                 if len(items) == 1:
 163                     prefix = f'- **{details}**:'
 164                 else:
 165                     yield f'- **{details}**'
 166                     prefix = '\t-'
 167
 168             sub_detail_groups = itertools.groupby(items, lambda item: tuple(map(str.lower, item.sub_details)))
 169             for sub_details, entries in sub_detail_groups:
 170                 if not sub_details:
 171                     for entry in entries:
 172                         yield f'{prefix} {self.format_single_change(entry)}'
 173                     continue
 174
 175                 entries = list(entries)
 176                 sub_prefix = f'{prefix} {", ".join(entries[0].sub_details)}'
 177                 if len(entries) == 1:
 178                     yield f'{sub_prefix}: {self.format_single_change(entries[0])}'
 179                     continue
 180
 181                 yield sub_prefix
 182                 for entry in entries:
 183                     yield f'\t{prefix} {self.format_single_change(entry)}'
 184
 185     def _prepare_cleanup_misc_items(self, items):
 186         cleanup_misc_items = defaultdict(list)
 187         sorted_items = []
 188         for item in items:
 189             if self.MISC_RE.search(item.message):
 190                 cleanup_misc_items[tuple(item.commit.authors)].append(item)
 191             else:
 192                 sorted_items.append(item)
 193
 194         for commit_infos in cleanup_misc_items.values():
 195             sorted_items.append(CommitInfo(
 196                 'cleanup', ('Miscellaneous',), ', '.join(
 197                     self._format_message_link(None, info.commit.hash)
 198                     for info in sorted(commit_infos, key=lambda item: item.commit.hash or '')),
 199                 [], Commit(None, '', commit_infos[0].commit.authors), []))
 200
 201         return sorted_items
 202
 203     def format_single_change(self, info: CommitInfo):
 204         message, sep, rest = info.message.partition('\n')
 205         if '[' not in message:
 206             # If the message doesn't already contain markdown links, try to add a link to the commit
 207             message = self._format_message_link(message, info.commit.hash)
 208
 209         if info.issues:
 210             message = f'{message} ({self._format_issues(info.issues)})'
 211
 212         if info.commit.authors:
 213             message = f'{message} by {self._format_authors(info.commit.authors)}'
 214
 215         if info.fixes:
 216             fix_message = ', '.join(f'{self._format_message_link(None, fix.hash)}' for fix in info.fixes)
 217
 218             authors = sorted({author for fix in info.fixes for author in fix.authors}, key=str.casefold)
 219             if authors != info.commit.authors:
 220                 fix_message = f'{fix_message} by {self._format_authors(authors)}'
 221
 222             message = f'{message} (With fixes in {fix_message})'
 223
 224         return message if not sep else f'{message}{sep}{rest}'
 225
 226     def _format_message_link(self, message, commit_hash):
 227         assert message or commit_hash, 'Improperly defined commit message or override'
 228         message = message if message else commit_hash[:HASH_LENGTH]
 229         return f'[{message}]({self.repo_url}/commit/{commit_hash})' if commit_hash else message
 230
 231     def _format_issues(self, issues):
 232         return ', '.join(f'[#{issue}]({self.repo_url}/issues/{issue})' for issue in issues)
 233
 234     @staticmethod
 235     def _format_authors(authors):
 236         return ', '.join(f'[{author}]({BASE_URL}/{author})' for author in authors)
 237
 238     @property
 239     def repo_url(self):
 240         return f'{BASE_URL}/{self._repo}'
 241
 242
 243 class CommitRange:
 244     COMMAND = 'git'
 245     COMMIT_SEPARATOR = '-----'
 246
 247     AUTHOR_INDICATOR_RE = re.compile(r'Authored by:? ', re.IGNORECASE)
 248     MESSAGE_RE = re.compile(r'''
 249         (?:\[(?P<prefix>[^\]]+)\]\ )?
 250         (?:(?P<sub_details>`?[\w.-]+`?): )?
 251         (?P<message>.+?)
 252         (?:\ \((?P<issues>\#\d+(?:,\ \#\d+)*)\))?
 253         ''', re.VERBOSE | re.DOTALL)
 254     EXTRACTOR_INDICATOR_RE = re.compile(r'(?:Fix|Add)\s+Extractors?', re.IGNORECASE)
 255     REVERT_RE = re.compile(r'(?:\[[^\]]+\]\s+)?(?i:Revert)\s+([\da-f]{40})')
 256     FIXES_RE = re.compile(r'(?i:Fix(?:es)?(?:\s+bugs?)?(?:\s+in|\s+for)?|Revert|Improve)\s+([\da-f]{40})')
 257     UPSTREAM_MERGE_RE = re.compile(r'Update to ytdl-commit-([\da-f]+)')
 258
 259     def __init__(self, start, end, default_author=None):
 260         self._start, self._end = start, end
 261         self._commits, self._fixes = self._get_commits_and_fixes(default_author)
 262         self._commits_added = []
 263
 264     def __iter__(self):
 265         return iter(itertools.chain(self._commits.values(), self._commits_added))
 266
 267     def __len__(self):
 268         return len(self._commits) + len(self._commits_added)
 269
 270     def __contains__(self, commit):
 271         if isinstance(commit, Commit):
 272             if not commit.hash:
 273                 return False
 274             commit = commit.hash
 275
 276         return commit in self._commits
 277
 278     def _get_commits_and_fixes(self, default_author):
 279         result = run_process(
 280             self.COMMAND, 'log', f'--format=%H%n%s%n%b%n{self.COMMIT_SEPARATOR}',
 281             f'{self._start}..{self._end}' if self._start else self._end).stdout
 282
 283         commits, reverts = {}, {}
 284         fixes = defaultdict(list)
 285         lines = iter(result.splitlines(False))
 286         for i, commit_hash in enumerate(lines):
 287             short = next(lines)
 288             skip = short.startswith('Release ') or short == '[version] update'
 289
 290             authors = [default_author] if default_author else []
 291             for line in iter(lambda: next(lines), self.COMMIT_SEPARATOR):
 292                 match = self.AUTHOR_INDICATOR_RE.match(line)
 293                 if match:
 294                     authors = sorted(map(str.strip, line[match.end():].split(',')), key=str.casefold)
 295
 296             commit = Commit(commit_hash, short, authors)
 297             if skip and (self._start or not i):
 298                 logger.debug(f'Skipped commit: {commit}')
 299                 continue
 300             elif skip:
 301                 logger.debug(f'Reached Release commit, breaking: {commit}')
 302                 break
 303
 304             revert_match = self.REVERT_RE.fullmatch(commit.short)
 305             if revert_match:
 306                 reverts[revert_match.group(1)] = commit
 307                 continue
 308
 309             fix_match = self.FIXES_RE.search(commit.short)
 310             if fix_match:
 311                 commitish = fix_match.group(1)
 312                 fixes[commitish].append(commit)
 313
 314             commits[commit.hash] = commit
 315
 316         for commitish, revert_commit in reverts.items():
 317             reverted = commits.pop(commitish, None)
 318             if reverted:
 319                 logger.debug(f'{commitish} fully reverted {reverted}')
 320             else:
 321                 commits[revert_commit.hash] = revert_commit
 322
 323         for commitish, fix_commits in fixes.items():
 324             if commitish in commits:
 325                 hashes = ', '.join(commit.hash[:HASH_LENGTH] for commit in fix_commits)
 326                 logger.info(f'Found fix(es) for {commitish[:HASH_LENGTH]}: {hashes}')
 327                 for fix_commit in fix_commits:
 328                     del commits[fix_commit.hash]
 329             else:
 330                 logger.debug(f'Commit with fixes not in changes: {commitish[:HASH_LENGTH]}')
 331
 332         return commits, fixes
 333
 334     def apply_overrides(self, overrides):
 335         for override in overrides:
 336             when = override.get('when')
 337             if when and when not in self and when != self._start:
 338                 logger.debug(f'Ignored {when!r} override')
 339                 continue
 340
 341             override_hash = override.get('hash') or when
 342             if override['action'] == 'add':
 343                 commit = Commit(override.get('hash'), override['short'], override.get('authors') or [])
 344                 logger.info(f'ADD    {commit}')
 345                 self._commits_added.append(commit)
 346
 347             elif override['action'] == 'remove':
 348                 if override_hash in self._commits:
 349                     logger.info(f'REMOVE {self._commits[override_hash]}')
 350                     del self._commits[override_hash]
 351
 352             elif override['action'] == 'change':
 353                 if override_hash not in self._commits:
 354                     continue
 355                 commit = Commit(override_hash, override['short'], override.get('authors') or [])
 356                 logger.info(f'CHANGE {self._commits[commit.hash]} -> {commit}')
 357                 self._commits[commit.hash] = commit
 358
 359         self._commits = dict(reversed(self._commits.items()))
 360
 361     def groups(self):
 362         group_dict = defaultdict(list)
 363         for commit in self:
 364             upstream_re = self.UPSTREAM_MERGE_RE.search(commit.short)
 365             if upstream_re:
 366                 commit.short = f'[upstream] Merged with youtube-dl {upstream_re.group(1)}'
 367
 368             match = self.MESSAGE_RE.fullmatch(commit.short)
 369             if not match:
 370                 logger.error(f'Error parsing short commit message: {commit.short!r}')
 371                 continue
 372
 373             prefix, sub_details_alt, message, issues = match.groups()
 374             issues = [issue.strip()[1:] for issue in issues.split(',')] if issues else []
 375
 376             if prefix:
 377                 groups, details, sub_details = zip(*map(self.details_from_prefix, prefix.split(',')))
 378                 group = next(iter(filter(None, groups)), None)
 379                 details = ', '.join(unique(details))
 380                 sub_details = list(itertools.chain.from_iterable(sub_details))
 381             else:
 382                 group = CommitGroup.CORE
 383                 details = None
 384                 sub_details = []
 385
 386             if sub_details_alt:
 387                 sub_details.append(sub_details_alt)
 388             sub_details = tuple(unique(sub_details))
 389
 390             if not group:
 391                 if self.EXTRACTOR_INDICATOR_RE.search(commit.short):
 392                     group = CommitGroup.EXTRACTOR
 393                     logger.error(f'Assuming [ie] group for {commit.short!r}')
 394                 else:
 395                     group = CommitGroup.CORE
 396
 397             commit_info = CommitInfo(
 398                 details, sub_details, message.strip(),
 399                 issues, commit, self._fixes[commit.hash])
 400
 401             logger.debug(f'Resolved {commit.short!r} to {commit_info!r}')
 402             group_dict[group].append(commit_info)
 403
 404         return group_dict
 405
 406     @staticmethod
 407     def details_from_prefix(prefix):
 408         if not prefix:
 409             return CommitGroup.CORE, None, ()
 410
 411         prefix, *sub_details = prefix.split(':')
 412
 413         group, details = CommitGroup.get(prefix)
 414         if group is CommitGroup.PRIORITY and details:
 415             details = details.partition('/')[2].strip()
 416
 417         if details and '/' in details:
 418             logger.error(f'Prefix is overnested, using first part: {prefix}')
 419             details = details.partition('/')[0].strip()
 420
 421         if details == 'common':
 422             details = None
 423         elif group is CommitGroup.NETWORKING and details == 'rh':
 424             details = 'Request Handler'
 425
 426         return group, details, sub_details
 427
 428
 429 def get_new_contributors(contributors_path, commits):
 430     contributors = set()
 431     if contributors_path.exists():
 432         for line in read_file(contributors_path).splitlines():
 433             author, _, _ = line.strip().partition(' (')
 434             authors = author.split('/')
 435             contributors.update(map(str.casefold, authors))
 436
 437     new_contributors = set()
 438     for commit in commits:
 439         for author in commit.authors:
 440             author_folded = author.casefold()
 441             if author_folded not in contributors:
 442                 contributors.add(author_folded)
 443                 new_contributors.add(author)
 444
 445     return sorted(new_contributors, key=str.casefold)
 446
 447
 448 def create_changelog(args):
 449     logging.basicConfig(
 450         datefmt='%Y-%m-%d %H-%M-%S', format='{asctime} | {levelname:<8} | {message}',
 451         level=logging.WARNING - 10 * args.verbosity, style='{', stream=sys.stderr)
 452
 453     commits = CommitRange(None, args.commitish, args.default_author)
 454
 455     if not args.no_override:
 456         if args.override_path.exists():
 457             overrides = json.loads(read_file(args.override_path))
 458             commits.apply_overrides(overrides)
 459         else:
 460             logger.warning(f'File {args.override_path.as_posix()} does not exist')
 461
 462     logger.info(f'Loaded {len(commits)} commits')
 463
 464     new_contributors = get_new_contributors(args.contributors_path, commits)
 465     if new_contributors:
 466         if args.contributors:
 467             write_file(args.contributors_path, '\n'.join(new_contributors) + '\n', mode='a')
 468         logger.info(f'New contributors: {", ".join(new_contributors)}')
 469
 470     return Changelog(commits.groups(), args.repo, args.collapsible)
 471
 472
 473 def create_parser():
 474     import argparse
 475
 476     parser = argparse.ArgumentParser(
 477         description='Create a changelog markdown from a git commit range')
 478     parser.add_argument(
 479         'commitish', default='HEAD', nargs='?',
 480         help='The commitish to create the range from (default: %(default)s)')
 481     parser.add_argument(
 482         '-v', '--verbosity', action='count', default=0,
 483         help='increase verbosity (can be used twice)')
 484     parser.add_argument(
 485         '-c', '--contributors', action='store_true',
 486         help='update CONTRIBUTORS file (default: %(default)s)')
 487     parser.add_argument(
 488         '--contributors-path', type=Path, default=LOCATION_PATH.parent / 'CONTRIBUTORS',
 489         help='path to the CONTRIBUTORS file')
 490     parser.add_argument(
 491         '--no-override', action='store_true',
 492         help='skip override json in commit generation (default: %(default)s)')
 493     parser.add_argument(
 494         '--override-path', type=Path, default=LOCATION_PATH / 'changelog_override.json',
 495         help='path to the changelog_override.json file')
 496     parser.add_argument(
 497         '--default-author', default='pukkandan',
 498         help='the author to use without a author indicator (default: %(default)s)')
 499     parser.add_argument(
 500         '--repo', default='yt-dlp/yt-dlp',
 501         help='the github repository to use for the operations (default: %(default)s)')
 502     parser.add_argument(
 503         '--collapsible', action='store_true',
 504         help='make changelog collapsible (default: %(default)s)')
 505
 506     return parser
 507
 508
 509 if __name__ == '__main__':
 510     print(create_changelog(create_parser().parse_args()))