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yt-dlp/yt_dlp/update.py

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from __future__ import annotations
import atexit
import contextlib
import functools
import hashlib
import json
import os
import platform
import re
import subprocess
import sys
from dataclasses import dataclass
from zipimport import zipimporter
from .networking import Request
from .networking.exceptions import HTTPError, network_exceptions
from .utils import (
NO_DEFAULT,
Popen,
deprecation_warning,
format_field,
remove_end,
shell_quote,
system_identifier,
version_tuple,
)
from .version import (
CHANNEL,
ORIGIN,
RELEASE_GIT_HEAD,
UPDATE_HINT,
VARIANT,
__version__,
)
UPDATE_SOURCES = {
'stable': 'yt-dlp/yt-dlp',
'nightly': 'yt-dlp/yt-dlp-nightly-builds',
'master': 'yt-dlp/yt-dlp-master-builds',
}
REPOSITORY = UPDATE_SOURCES['stable']
_INVERSE_UPDATE_SOURCES = {value: key for key, value in UPDATE_SOURCES.items()}
_VERSION_RE = re.compile(r'(\d+\.)*\d+')
_HASH_PATTERN = r'[\da-f]{40}'
_COMMIT_RE = re.compile(rf'Generated from: https://(?:[^/?#]+/){{3}}commit/(?P<hash>{_HASH_PATTERN})')
API_BASE_URL = 'https://api.github.com/repos'
# Backwards compatibility variables for the current channel
API_URL = f'{API_BASE_URL}/{REPOSITORY}/releases'
@functools.cache
def _get_variant_and_executable_path():
"""@returns (variant, executable_path)"""
if getattr(sys, 'frozen', False):
path = sys.executable
if not hasattr(sys, '_MEIPASS'):
return 'py2exe', path
elif sys._MEIPASS == os.path.dirname(path):
return f'{sys.platform}_dir', path
elif sys.platform == 'darwin':
machine = '_legacy' if version_tuple(platform.mac_ver()[0]) < (10, 15) else ''
else:
machine = f'_{platform.machine().lower()}'
# Ref: https://en.wikipedia.org/wiki/Uname#Examples
if machine[1:] in ('x86', 'x86_64', 'amd64', 'i386', 'i686'):
machine = '_x86' if platform.architecture()[0][:2] == '32' else ''
# sys.executable returns a /tmp/ path for staticx builds (linux_static)
# Ref: https://staticx.readthedocs.io/en/latest/usage.html#run-time-information
if static_exe_path := os.getenv('STATICX_PROG_PATH'):
path = static_exe_path
return f'{remove_end(sys.platform, "32")}{machine}_exe', path
path = os.path.dirname(__file__)
if isinstance(__loader__, zipimporter):
return 'zip', os.path.join(path, '..')
elif (os.path.basename(sys.argv[0]) in ('__main__.py', '-m')
and os.path.exists(os.path.join(path, '../.git/HEAD'))):
return 'source', path
return 'unknown', path
def detect_variant():
return VARIANT or _get_variant_and_executable_path()[0]
@functools.cache
def current_git_head():
if detect_variant() != 'source':
return
with contextlib.suppress(Exception):
stdout, _, _ = Popen.run(
['git', 'rev-parse', '--short', 'HEAD'],
text=True, cwd=os.path.dirname(os.path.abspath(__file__)),
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if re.fullmatch('[0-9a-f]+', stdout.strip()):
return stdout.strip()
_FILE_SUFFIXES = {
'zip': '',
'win_exe': '.exe',
'win_x86_exe': '_x86.exe',
'darwin_exe': '_macos',
'darwin_legacy_exe': '_macos_legacy',
'linux_exe': '_linux',
'linux_aarch64_exe': '_linux_aarch64',
'linux_armv7l_exe': '_linux_armv7l',
}
_NON_UPDATEABLE_REASONS = {
**{variant: None for variant in _FILE_SUFFIXES}, # Updatable
**{variant: f'Auto-update is not supported for unpackaged {name} executable; Re-download the latest release'
for variant, name in {'win32_dir': 'Windows', 'darwin_dir': 'MacOS', 'linux_dir': 'Linux'}.items()},
'py2exe': 'py2exe is no longer supported by yt-dlp; This executable cannot be updated',
'source': 'You cannot update when running from source code; Use git to pull the latest changes',
'unknown': 'You installed yt-dlp from a manual build or with a package manager; Use that to update',
'other': 'You are using an unofficial build of yt-dlp; Build the executable again',
}
def is_non_updateable():
if UPDATE_HINT:
return UPDATE_HINT
return _NON_UPDATEABLE_REASONS.get(
detect_variant(), _NON_UPDATEABLE_REASONS['unknown' if VARIANT else 'other'])
def _get_binary_name():
return format_field(_FILE_SUFFIXES, detect_variant(), template='yt-dlp%s', ignore=None, default=None)
def _get_system_deprecation():
MIN_SUPPORTED, MIN_RECOMMENDED = (3, 9), (3, 9)
if sys.version_info > MIN_RECOMMENDED:
return None
major, minor = sys.version_info[:2]
PYTHON_MSG = f'Please update to Python {".".join(map(str, MIN_RECOMMENDED))} or above'
if sys.version_info < MIN_SUPPORTED:
return f'Python version {major}.{minor} is no longer supported! {PYTHON_MSG}'
return f'Support for Python version {major}.{minor} has been deprecated. {PYTHON_MSG}'
def _sha256_file(path):
h = hashlib.sha256()
mv = memoryview(bytearray(128 * 1024))
with open(os.path.realpath(path), 'rb', buffering=0) as f:
for n in iter(lambda: f.readinto(mv), 0):
h.update(mv[:n])
return h.hexdigest()
def _make_label(origin, tag, version=None):
if '/' in origin:
channel = _INVERSE_UPDATE_SOURCES.get(origin, origin)
else:
channel = origin
label = f'{channel}@{tag}'
if version and version != tag:
label += f' build {version}'
if channel != origin:
label += f' from {origin}'
return label
@dataclass
class UpdateInfo:
"""
Update target information
Can be created by `query_update()` or manually.
Attributes:
tag The release tag that will be updated to. If from query_update,
the value is after API resolution and update spec processing.
The only property that is required.
version The actual numeric version (if available) of the binary to be updated to,
after API resolution and update spec processing. (default: None)
requested_version Numeric version of the binary being requested (if available),
after API resolution only. (default: None)
commit Commit hash (if available) of the binary to be updated to,
after API resolution and update spec processing. (default: None)
This value will only match the RELEASE_GIT_HEAD of prerelease builds.
binary_name Filename of the binary to be updated to. (default: current binary name)
checksum Expected checksum (if available) of the binary to be
updated to. (default: None)
"""
tag: str
version: str | None = None
requested_version: str | None = None
commit: str | None = None
binary_name: str | None = _get_binary_name() # noqa: RUF009: Always returns the same value
checksum: str | None = None
class Updater:
# XXX: use class variables to simplify testing
_channel = CHANNEL
_origin = ORIGIN
_update_sources = UPDATE_SOURCES
def __init__(self, ydl, target: str | None = None):
self.ydl = ydl
# For backwards compat, target needs to be treated as if it could be None
self.requested_channel, sep, self.requested_tag = (target or self._channel).rpartition('@')
# Check if requested_tag is actually the requested repo/channel
if not sep and ('/' in self.requested_tag or self.requested_tag in self._update_sources):
self.requested_channel = self.requested_tag
self.requested_tag: str = None # type: ignore (we set it later)
elif not self.requested_channel:
# User did not specify a channel, so we are requesting the default channel
self.requested_channel = self._channel.partition('@')[0]
# --update should not be treated as an exact tag request even if CHANNEL has a @tag
self._exact = bool(target) and target != self._channel
if not self.requested_tag:
# User did not specify a tag, so we request 'latest' and track that no exact tag was passed
self.requested_tag = 'latest'
self._exact = False
if '/' in self.requested_channel:
# requested_channel is actually a repository
self.requested_repo = self.requested_channel
if not self.requested_repo.startswith('yt-dlp/') and self.requested_repo != self._origin:
self.ydl.report_warning(
f'You are switching to an {self.ydl._format_err("unofficial", "red")} executable '
f'from {self.ydl._format_err(self.requested_repo, self.ydl.Styles.EMPHASIS)}. '
f'Run {self.ydl._format_err("at your own risk", "light red")}')
self._block_restart('Automatically restarting into custom builds is disabled for security reasons')
else:
# Check if requested_channel resolves to a known repository or else raise
self.requested_repo = self._update_sources.get(self.requested_channel)
if not self.requested_repo:
self._report_error(
f'Invalid update channel {self.requested_channel!r} requested. '
f'Valid channels are {", ".join(self._update_sources)}', True)
self._identifier = f'{detect_variant()} {system_identifier()}'
@property
def current_version(self):
"""Current version"""
return __version__
@property
def current_commit(self):
"""Current commit hash"""
return RELEASE_GIT_HEAD
def _download_asset(self, name, tag=None):
if not tag:
tag = self.requested_tag
path = 'latest/download' if tag == 'latest' else f'download/{tag}'
url = f'https://github.com/{self.requested_repo}/releases/{path}/{name}'
self.ydl.write_debug(f'Downloading {name} from {url}')
return self.ydl.urlopen(url).read()
def _call_api(self, tag):
tag = f'tags/{tag}' if tag != 'latest' else tag
url = f'{API_BASE_URL}/{self.requested_repo}/releases/{tag}'
self.ydl.write_debug(f'Fetching release info: {url}')
return json.loads(self.ydl.urlopen(Request(url, headers={
'Accept': 'application/vnd.github+json',
'User-Agent': 'yt-dlp',
'X-GitHub-Api-Version': '2022-11-28',
})).read().decode())
def _get_version_info(self, tag: str) -> tuple[str | None, str | None]:
if _VERSION_RE.fullmatch(tag):
return tag, None
api_info = self._call_api(tag)
if tag == 'latest':
requested_version = api_info['tag_name']
else:
match = re.search(rf'\s+(?P<version>{_VERSION_RE.pattern})$', api_info.get('name', ''))
requested_version = match.group('version') if match else None
if re.fullmatch(_HASH_PATTERN, api_info.get('target_commitish', '')):
target_commitish = api_info['target_commitish']
else:
match = _COMMIT_RE.match(api_info.get('body', ''))
target_commitish = match.group('hash') if match else None
if not (requested_version or target_commitish):
self._report_error('One of either version or commit hash must be available on the release', expected=True)
return requested_version, target_commitish
def _download_update_spec(self, source_tags):
for tag in source_tags:
try:
return self._download_asset('_update_spec', tag=tag).decode()
except network_exceptions as error:
if isinstance(error, HTTPError) and error.status == 404:
continue
self._report_network_error(f'fetch update spec: {error}')
return None
self._report_error(
f'The requested tag {self.requested_tag} does not exist for {self.requested_repo}', True)
return None
def _process_update_spec(self, lockfile: str, resolved_tag: str):
lines = lockfile.splitlines()
is_version2 = any(line.startswith('lockV2 ') for line in lines)
for line in lines:
if is_version2:
if not line.startswith(f'lockV2 {self.requested_repo} '):
continue
_, _, tag, pattern = line.split(' ', 3)
else:
if not line.startswith('lock '):
continue
_, tag, pattern = line.split(' ', 2)
if re.match(pattern, self._identifier):
if _VERSION_RE.fullmatch(tag):
if not self._exact:
return tag
elif self._version_compare(tag, resolved_tag):
return resolved_tag
elif tag != resolved_tag:
continue
self._report_error(
f'yt-dlp cannot be updated to {resolved_tag} since you are on an older Python version '
'or your operating system is not compatible with the requested build', True)
return None
return resolved_tag
def _version_compare(self, a: str, b: str):
"""
Compare two version strings
This function SHOULD NOT be called if self._exact == True
"""
if _VERSION_RE.fullmatch(f'{a}.{b}'):
return version_tuple(a) >= version_tuple(b)
return a == b
def query_update(self, *, _output=False) -> UpdateInfo | None:
"""Fetches info about the available update
@returns An `UpdateInfo` if there is an update available, else None
"""
if not self.requested_repo:
self._report_error('No target repository could be determined from input')
return None
try:
requested_version, target_commitish = self._get_version_info(self.requested_tag)
except network_exceptions as e:
self._report_network_error(f'obtain version info ({e})', delim='; Please try again later or')
return None
if self._exact and self._origin != self.requested_repo:
has_update = True
elif requested_version:
if self._exact:
has_update = self.current_version != requested_version
else:
has_update = not self._version_compare(self.current_version, requested_version)
elif target_commitish:
has_update = target_commitish != self.current_commit
else:
has_update = False
resolved_tag = requested_version if self.requested_tag == 'latest' else self.requested_tag
current_label = _make_label(self._origin, self._channel.partition('@')[2] or self.current_version, self.current_version)
requested_label = _make_label(self.requested_repo, resolved_tag, requested_version)
latest_or_requested = f'{"Latest" if self.requested_tag == "latest" else "Requested"} version: {requested_label}'
if not has_update:
if _output:
self.ydl.to_screen(f'{latest_or_requested}\nyt-dlp is up to date ({current_label})')
return None
update_spec = self._download_update_spec(('latest', None) if requested_version else (None,))
if not update_spec:
return None
# `result_` prefixed vars == post-_process_update_spec() values
result_tag = self._process_update_spec(update_spec, resolved_tag)
if not result_tag or result_tag == self.current_version:
return None
elif result_tag == resolved_tag:
result_version = requested_version
elif _VERSION_RE.fullmatch(result_tag):
result_version = result_tag
else: # actual version being updated to is unknown
result_version = None
checksum = None
# Non-updateable variants can get update_info but need to skip checksum
if not is_non_updateable():
try:
hashes = self._download_asset('SHA2-256SUMS', result_tag)
except network_exceptions as error:
if not isinstance(error, HTTPError) or error.status != 404:
self._report_network_error(f'fetch checksums: {error}')
return None
self.ydl.report_warning('No hash information found for the release, skipping verification')
else:
for ln in hashes.decode().splitlines():
if ln.endswith(_get_binary_name()):
checksum = ln.split()[0]
break
if not checksum:
self.ydl.report_warning('The hash could not be found in the checksum file, skipping verification')
if _output:
update_label = _make_label(self.requested_repo, result_tag, result_version)
self.ydl.to_screen(
f'Current version: {current_label}\n{latest_or_requested}'
+ (f'\nUpgradable to: {update_label}' if update_label != requested_label else ''))
return UpdateInfo(
tag=result_tag,
version=result_version,
requested_version=requested_version,
commit=target_commitish if result_tag == resolved_tag else None,
checksum=checksum)
def update(self, update_info=NO_DEFAULT):
"""Update yt-dlp executable to the latest version
@param update_info `UpdateInfo | None` as returned by query_update()
"""
if update_info is NO_DEFAULT:
update_info = self.query_update(_output=True)
if not update_info:
return False
err = is_non_updateable()
if err:
self._report_error(err, True)
return False
self.ydl.to_screen(f'Current Build Hash: {_sha256_file(self.filename)}')
update_label = _make_label(self.requested_repo, update_info.tag, update_info.version)
self.ydl.to_screen(f'Updating to {update_label} ...')
directory = os.path.dirname(self.filename)
if not os.access(self.filename, os.W_OK):
return self._report_permission_error(self.filename)
elif not os.access(directory, os.W_OK):
return self._report_permission_error(directory)
new_filename, old_filename = f'{self.filename}.new', f'{self.filename}.old'
if detect_variant() == 'zip': # Can be replaced in-place
new_filename, old_filename = self.filename, None
try:
if os.path.exists(old_filename or ''):
os.remove(old_filename)
except OSError:
return self._report_error('Unable to remove the old version')
try:
newcontent = self._download_asset(update_info.binary_name, update_info.tag)
except network_exceptions as e:
if isinstance(e, HTTPError) and e.status == 404:
return self._report_error(
f'The requested tag {self.requested_repo}@{update_info.tag} does not exist', True)
return self._report_network_error(f'fetch updates: {e}', tag=update_info.tag)
if not update_info.checksum:
self._block_restart('Automatically restarting into unverified builds is disabled for security reasons')
elif hashlib.sha256(newcontent).hexdigest() != update_info.checksum:
return self._report_network_error('verify the new executable', tag=update_info.tag)
try:
with open(new_filename, 'wb') as outf:
outf.write(newcontent)
except OSError:
return self._report_permission_error(new_filename)
if old_filename:
mask = os.stat(self.filename).st_mode
try:
os.rename(self.filename, old_filename)
except OSError:
return self._report_error('Unable to move current version')
try:
os.rename(new_filename, self.filename)
except OSError:
self._report_error('Unable to overwrite current version')
return os.rename(old_filename, self.filename)
variant = detect_variant()
if variant.startswith('win'):
atexit.register(Popen, f'ping 127.0.0.1 -n 5 -w 1000 & del /F "{old_filename}"',
shell=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
elif old_filename:
try:
os.remove(old_filename)
except OSError:
self._report_error('Unable to remove the old version')
try:
os.chmod(self.filename, mask)
except OSError:
return self._report_error(
f'Unable to set permissions. Run: sudo chmod a+rx {shell_quote(self.filename)}')
self.ydl.to_screen(f'Updated yt-dlp to {update_label}')
return True
@functools.cached_property
def filename(self):
"""Filename of the executable"""
return os.path.realpath(_get_variant_and_executable_path()[1])
@functools.cached_property
def cmd(self):
"""The command-line to run the executable, if known"""
# There is no sys.orig_argv in py < 3.10. Also, it can be [] when frozen
if getattr(sys, 'orig_argv', None):
return sys.orig_argv
elif getattr(sys, 'frozen', False):
return sys.argv
def restart(self):
"""Restart the executable"""
assert self.cmd, 'Must be frozen or Py >= 3.10'
self.ydl.write_debug(f'Restarting: {shell_quote(self.cmd)}')
_, _, returncode = Popen.run(self.cmd)
return returncode
def _block_restart(self, msg):
def wrapper():
self._report_error(f'{msg}. Restart yt-dlp to use the updated version', expected=True)
return self.ydl._download_retcode
self.restart = wrapper
def _report_error(self, msg, expected=False):
self.ydl.report_error(msg, tb=False if expected else None)
self.ydl._download_retcode = 100
def _report_permission_error(self, file):
self._report_error(f'Unable to write to {file}; try running as administrator', True)
def _report_network_error(self, action, delim=';', tag=None):
if not tag:
tag = self.requested_tag
path = tag if tag == 'latest' else f'tag/{tag}'
self._report_error(
f'Unable to {action}{delim} visit '
f'https://github.com/{self.requested_repo}/releases/{path}', True)
def run_update(ydl):
"""Update the program file with the latest version from the repository
@returns Whether there was a successful update (No update = False)
"""
deprecation_warning(
'"yt_dlp.update.run_update(ydl)" is deprecated and may be removed in a future version. '
'Use "yt_dlp.update.Updater(ydl).update()" instead')
return Updater(ydl).update()
__all__ = ['Updater']
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