yt_dlp/update.py

   1 import atexit
   2 import contextlib
   3 import hashlib
   4 import json
   5 import os
   6 import platform
   7 import re
   8 import subprocess
   9 import sys
  10 import urllib.error
  11 from zipimport import zipimporter
  12
  13 from .compat import functools  # isort: split
  14 from .compat import compat_realpath, compat_shlex_quote
  15 from .utils import (
  16     Popen,
  17     cached_method,
  18     deprecation_warning,
  19     network_exceptions,
  20     remove_end,
  21     remove_start,
  22     sanitized_Request,
  23     shell_quote,
  24     system_identifier,
  25     version_tuple,
  26 )
  27 from .version import CHANNEL, UPDATE_HINT, VARIANT, __version__
  28
  29 UPDATE_SOURCES = {
  30     'stable': 'yt-dlp/yt-dlp',
  31     'nightly': 'yt-dlp/yt-dlp-nightly-builds',
  32 }
  33 REPOSITORY = UPDATE_SOURCES['stable']
  34
  35 _VERSION_RE = re.compile(r'(\d+\.)*\d+')
  36
  37 API_BASE_URL = 'https://api.github.com/repos'
  38
  39 # Backwards compatibility variables for the current channel
  40 API_URL = f'{API_BASE_URL}/{REPOSITORY}/releases'
  41
  42
  43 @functools.cache
  44 def _get_variant_and_executable_path():
  45     """@returns (variant, executable_path)"""
  46     if getattr(sys, 'frozen', False):
  47         path = sys.executable
  48         if not hasattr(sys, '_MEIPASS'):
  49             return 'py2exe', path
  50         elif sys._MEIPASS == os.path.dirname(path):
  51             return f'{sys.platform}_dir', path
  52         elif sys.platform == 'darwin':
  53             machine = '_legacy' if version_tuple(platform.mac_ver()[0]) < (10, 15) else ''
  54         else:
  55             machine = f'_{platform.machine().lower()}'
  56             # Ref: https://en.wikipedia.org/wiki/Uname#Examples
  57             if machine[1:] in ('x86', 'x86_64', 'amd64', 'i386', 'i686'):
  58                 machine = '_x86' if platform.architecture()[0][:2] == '32' else ''
  59         return f'{remove_end(sys.platform, "32")}{machine}_exe', path
  60
  61     path = os.path.dirname(__file__)
  62     if isinstance(__loader__, zipimporter):
  63         return 'zip', os.path.join(path, '..')
  64     elif (os.path.basename(sys.argv[0]) in ('__main__.py', '-m')
  65           and os.path.exists(os.path.join(path, '../.git/HEAD'))):
  66         return 'source', path
  67     return 'unknown', path
  68
  69
  70 def detect_variant():
  71     return VARIANT or _get_variant_and_executable_path()[0]
  72
  73
  74 @functools.cache
  75 def current_git_head():
  76     if detect_variant() != 'source':
  77         return
  78     with contextlib.suppress(Exception):
  79         stdout, _, _ = Popen.run(
  80             ['git', 'rev-parse', '--short', 'HEAD'],
  81             text=True, cwd=os.path.dirname(os.path.abspath(__file__)),
  82             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  83         if re.fullmatch('[0-9a-f]+', stdout.strip()):
  84             return stdout.strip()
  85
  86
  87 _FILE_SUFFIXES = {
  88     'zip': '',
  89     'py2exe': '_min.exe',
  90     'win_exe': '.exe',
  91     'win_x86_exe': '_x86.exe',
  92     'darwin_exe': '_macos',
  93     'darwin_legacy_exe': '_macos_legacy',
  94     'linux_exe': '_linux',
  95     'linux_aarch64_exe': '_linux_aarch64',
  96     'linux_armv7l_exe': '_linux_armv7l',
  97 }
  98
  99 _NON_UPDATEABLE_REASONS = {
 100     **{variant: None for variant in _FILE_SUFFIXES},  # Updatable
 101     **{variant: f'Auto-update is not supported for unpackaged {name} executable; Re-download the latest release'
 102        for variant, name in {'win32_dir': 'Windows', 'darwin_dir': 'MacOS', 'linux_dir': 'Linux'}.items()},
 103     'source': 'You cannot update when running from source code; Use git to pull the latest changes',
 104     'unknown': 'You installed yt-dlp with a package manager or setup.py; Use that to update',
 105     'other': 'You are using an unofficial build of yt-dlp; Build the executable again',
 106 }
 107
 108
 109 def is_non_updateable():
 110     if UPDATE_HINT:
 111         return UPDATE_HINT
 112     return _NON_UPDATEABLE_REASONS.get(
 113         detect_variant(), _NON_UPDATEABLE_REASONS['unknown' if VARIANT else 'other'])
 114
 115
 116 def _sha256_file(path):
 117     h = hashlib.sha256()
 118     mv = memoryview(bytearray(128 * 1024))
 119     with open(os.path.realpath(path), 'rb', buffering=0) as f:
 120         for n in iter(lambda: f.readinto(mv), 0):
 121             h.update(mv[:n])
 122     return h.hexdigest()
 123
 124
 125 class Updater:
 126     _exact = True
 127
 128     def __init__(self, ydl, target=None):
 129         self.ydl = ydl
 130
 131         self.target_channel, sep, self.target_tag = (target or CHANNEL).rpartition('@')
 132         if not sep and self.target_tag in UPDATE_SOURCES:  # stable => stable@latest
 133             self.target_channel, self.target_tag = self.target_tag, None
 134         elif not self.target_channel:
 135             self.target_channel = CHANNEL
 136
 137         if not self.target_tag:
 138             self.target_tag, self._exact = 'latest', False
 139         elif self.target_tag != 'latest':
 140             self.target_tag = f'tags/{self.target_tag}'
 141
 142     @property
 143     def _target_repo(self):
 144         try:
 145             return UPDATE_SOURCES[self.target_channel]
 146         except KeyError:
 147             return self._report_error(
 148                 f'Invalid update channel {self.target_channel!r} requested. '
 149                 f'Valid channels are {", ".join(UPDATE_SOURCES)}', True)
 150
 151     def _version_compare(self, a, b, channel=CHANNEL):
 152         if channel != self.target_channel:
 153             return False
 154
 155         if _VERSION_RE.fullmatch(f'{a}.{b}'):
 156             a, b = version_tuple(a), version_tuple(b)
 157             return a == b if self._exact else a >= b
 158         return a == b
 159
 160     @functools.cached_property
 161     def _tag(self):
 162         if self._version_compare(self.current_version, self.latest_version):
 163             return self.target_tag
 164
 165         identifier = f'{detect_variant()} {self.target_channel} {system_identifier()}'
 166         for line in self._download('_update_spec', 'latest').decode().splitlines():
 167             if not line.startswith('lock '):
 168                 continue
 169             _, tag, pattern = line.split(' ', 2)
 170             if re.match(pattern, identifier):
 171                 if not self._exact:
 172                     return f'tags/{tag}'
 173                 elif self.target_tag == 'latest' or not self._version_compare(
 174                         tag, self.target_tag[5:], channel=self.target_channel):
 175                     self._report_error(
 176                         f'yt-dlp cannot be updated above {tag} since you are on an older Python version', True)
 177                     return f'tags/{self.current_version}'
 178         return self.target_tag
 179
 180     @cached_method
 181     def _get_version_info(self, tag):
 182         url = f'{API_BASE_URL}/{self._target_repo}/releases/{tag}'
 183         self.ydl.write_debug(f'Fetching release info: {url}')
 184         return json.loads(self.ydl.urlopen(sanitized_Request(url, headers={
 185             'Accept': 'application/vnd.github+json',
 186             'User-Agent': 'yt-dlp',
 187             'X-GitHub-Api-Version': '2022-11-28',
 188         })).read().decode())
 189
 190     @property
 191     def current_version(self):
 192         """Current version"""
 193         return __version__
 194
 195     @staticmethod
 196     def _label(channel, tag):
 197         """Label for a given channel and tag"""
 198         return f'{channel}@{remove_start(tag, "tags/")}'
 199
 200     def _get_actual_tag(self, tag):
 201         if tag.startswith('tags/'):
 202             return tag[5:]
 203         return self._get_version_info(tag)['tag_name']
 204
 205     @property
 206     def new_version(self):
 207         """Version of the latest release we can update to"""
 208         return self._get_actual_tag(self._tag)
 209
 210     @property
 211     def latest_version(self):
 212         """Version of the target release"""
 213         return self._get_actual_tag(self.target_tag)
 214
 215     @property
 216     def has_update(self):
 217         """Whether there is an update available"""
 218         return not self._version_compare(self.current_version, self.new_version)
 219
 220     @functools.cached_property
 221     def filename(self):
 222         """Filename of the executable"""
 223         return compat_realpath(_get_variant_and_executable_path()[1])
 224
 225     def _download(self, name, tag):
 226         slug = 'latest/download' if tag == 'latest' else f'download/{tag[5:]}'
 227         url = f'https://github.com/{self._target_repo}/releases/{slug}/{name}'
 228         self.ydl.write_debug(f'Downloading {name} from {url}')
 229         return self.ydl.urlopen(url).read()
 230
 231     @functools.cached_property
 232     def release_name(self):
 233         """The release filename"""
 234         return f'yt-dlp{_FILE_SUFFIXES[detect_variant()]}'
 235
 236     @functools.cached_property
 237     def release_hash(self):
 238         """Hash of the latest release"""
 239         hash_data = dict(ln.split()[::-1] for ln in self._download('SHA2-256SUMS', self._tag).decode().splitlines())
 240         return hash_data[self.release_name]
 241
 242     def _report_error(self, msg, expected=False):
 243         self.ydl.report_error(msg, tb=False if expected else None)
 244         self.ydl._download_retcode = 100
 245
 246     def _report_permission_error(self, file):
 247         self._report_error(f'Unable to write to {file}; Try running as administrator', True)
 248
 249     def _report_network_error(self, action, delim=';'):
 250         self._report_error(
 251             f'Unable to {action}{delim} visit  '
 252             f'https://github.com/{self._target_repo}/releases/{self.target_tag.replace("tags/", "tag/")}', True)
 253
 254     def check_update(self):
 255         """Report whether there is an update available"""
 256         if not self._target_repo:
 257             return False
 258         try:
 259             self.ydl.to_screen((
 260                 f'Available version: {self._label(self.target_channel, self.latest_version)}, ' if self.target_tag == 'latest' else ''
 261             ) + f'Current version: {self._label(CHANNEL, self.current_version)}')
 262         except network_exceptions as e:
 263             return self._report_network_error(f'obtain version info ({e})', delim='; Please try again later or')
 264
 265         if not is_non_updateable():
 266             self.ydl.to_screen(f'Current Build Hash: {_sha256_file(self.filename)}')
 267
 268         if self.has_update:
 269             return True
 270
 271         if self.target_tag == self._tag:
 272             self.ydl.to_screen(f'yt-dlp is up to date ({self._label(CHANNEL, self.current_version)})')
 273         elif not self._exact:
 274             self.ydl.report_warning('yt-dlp cannot be updated any further since you are on an older Python version')
 275         return False
 276
 277     def update(self):
 278         """Update yt-dlp executable to the latest version"""
 279         if not self.check_update():
 280             return
 281         err = is_non_updateable()
 282         if err:
 283             return self._report_error(err, True)
 284         self.ydl.to_screen(f'Updating to {self._label(self.target_channel, self.new_version)} ...')
 285         if (_VERSION_RE.fullmatch(self.target_tag[5:])
 286                 and version_tuple(self.target_tag[5:]) < (2023, 3, 2)):
 287             self.ydl.report_warning('You are downgrading to a version without --update-to')
 288
 289         directory = os.path.dirname(self.filename)
 290         if not os.access(self.filename, os.W_OK):
 291             return self._report_permission_error(self.filename)
 292         elif not os.access(directory, os.W_OK):
 293             return self._report_permission_error(directory)
 294
 295         new_filename, old_filename = f'{self.filename}.new', f'{self.filename}.old'
 296         if detect_variant() == 'zip':  # Can be replaced in-place
 297             new_filename, old_filename = self.filename, None
 298
 299         try:
 300             if os.path.exists(old_filename or ''):
 301                 os.remove(old_filename)
 302         except OSError:
 303             return self._report_error('Unable to remove the old version')
 304
 305         try:
 306             newcontent = self._download(self.release_name, self._tag)
 307         except network_exceptions as e:
 308             if isinstance(e, urllib.error.HTTPError) and e.code == 404:
 309                 return self._report_error(
 310                     f'The requested tag {self._label(self.target_channel, self.target_tag)} does not exist', True)
 311             return self._report_network_error(f'fetch updates: {e}')
 312
 313         try:
 314             expected_hash = self.release_hash
 315         except Exception:
 316             self.ydl.report_warning('no hash information found for the release')
 317         else:
 318             if hashlib.sha256(newcontent).hexdigest() != expected_hash:
 319                 return self._report_network_error('verify the new executable')
 320
 321         try:
 322             with open(new_filename, 'wb') as outf:
 323                 outf.write(newcontent)
 324         except OSError:
 325             return self._report_permission_error(new_filename)
 326
 327         if old_filename:
 328             mask = os.stat(self.filename).st_mode
 329             try:
 330                 os.rename(self.filename, old_filename)
 331             except OSError:
 332                 return self._report_error('Unable to move current version')
 333
 334             try:
 335                 os.rename(new_filename, self.filename)
 336             except OSError:
 337                 self._report_error('Unable to overwrite current version')
 338                 return os.rename(old_filename, self.filename)
 339
 340         variant = detect_variant()
 341         if variant.startswith('win') or variant == 'py2exe':
 342             atexit.register(Popen, f'ping 127.0.0.1 -n 5 -w 1000 & del /F "{old_filename}"',
 343                             shell=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
 344         elif old_filename:
 345             try:
 346                 os.remove(old_filename)
 347             except OSError:
 348                 self._report_error('Unable to remove the old version')
 349
 350             try:
 351                 os.chmod(self.filename, mask)
 352             except OSError:
 353                 return self._report_error(
 354                     f'Unable to set permissions. Run: sudo chmod a+rx {compat_shlex_quote(self.filename)}')
 355
 356         self.ydl.to_screen(f'Updated yt-dlp to {self._label(self.target_channel, self.new_version)}')
 357         return True
 358
 359     @functools.cached_property
 360     def cmd(self):
 361         """The command-line to run the executable, if known"""
 362         # There is no sys.orig_argv in py < 3.10. Also, it can be [] when frozen
 363         if getattr(sys, 'orig_argv', None):
 364             return sys.orig_argv
 365         elif getattr(sys, 'frozen', False):
 366             return sys.argv
 367
 368     def restart(self):
 369         """Restart the executable"""
 370         assert self.cmd, 'Must be frozen or Py >= 3.10'
 371         self.ydl.write_debug(f'Restarting: {shell_quote(self.cmd)}')
 372         _, _, returncode = Popen.run(self.cmd)
 373         return returncode
 374
 375
 376 def run_update(ydl):
 377     """Update the program file with the latest version from the repository
 378     @returns    Whether there was a successful update (No update = False)
 379     """
 380     return Updater(ydl).update()
 381
 382
 383 # Deprecated
 384 def update_self(to_screen, verbose, opener):
 385     import traceback
 386
 387     deprecation_warning(f'"{__name__}.update_self" is deprecated and may be removed '
 388                         f'in a future version. Use "{__name__}.run_update(ydl)" instead')
 389
 390     printfn = to_screen
 391
 392     class FakeYDL():
 393         to_screen = printfn
 394
 395         def report_warning(self, msg, *args, **kwargs):
 396             return printfn(f'WARNING: {msg}', *args, **kwargs)
 397
 398         def report_error(self, msg, tb=None):
 399             printfn(f'ERROR: {msg}')
 400             if not verbose:
 401                 return
 402             if tb is None:
 403                 # Copied from YoutubeDL.trouble
 404                 if sys.exc_info()[0]:
 405                     tb = ''
 406                     if hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
 407                         tb += ''.join(traceback.format_exception(*sys.exc_info()[1].exc_info))
 408                     tb += traceback.format_exc()
 409                 else:
 410                     tb_data = traceback.format_list(traceback.extract_stack())
 411                     tb = ''.join(tb_data)
 412             if tb:
 413                 printfn(tb)
 414
 415         def write_debug(self, msg, *args, **kwargs):
 416             printfn(f'[debug] {msg}', *args, **kwargs)
 417
 418         def urlopen(self, url):
 419             return opener.open(url)
 420
 421     return run_update(FakeYDL())
 422
 423
 424 __all__ = ['Updater']