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yt-dlp/yt_dlp/update.py
pukkandan 0b9c08b47b
[utils] Improve performance using functools.cache 
Closes #3786
2022-05-19 20:23:53 +05:30

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import hashlib
import json
import os
import platform
import subprocess
import sys
import traceback
from zipimport import zipimporter
from .compat import compat_realpath, functools
from .utils import Popen, encode_compat_str, write_string
from .version import __version__
@functools.cache
def detect_variant():
if hasattr(sys, 'frozen'):
prefix = 'mac' if sys.platform == 'darwin' else 'win'
if getattr(sys, '_MEIPASS', None):
if sys._MEIPASS == os.path.dirname(sys.executable):
return f'{prefix}_dir'
return f'{prefix}_exe'
return 'py2exe'
elif isinstance(__loader__, zipimporter):
return 'zip'
elif os.path.basename(sys.argv[0]) == '__main__.py':
return 'source'
return 'unknown'
_NON_UPDATEABLE_REASONS = {
'win_exe': None,
'zip': None,
'mac_exe': None,
'py2exe': None,
'win_dir': 'Auto-update is not supported for unpackaged windows executable; Re-download the latest release',
'mac_dir': 'Auto-update is not supported for unpackaged MacOS executable; Re-download the latest release',
'source': 'You cannot update when running from source code; Use git to pull the latest changes',
'unknown': 'It looks like you installed yt-dlp with a package manager, pip or setup.py; Use that to update',
}
def is_non_updateable():
return _NON_UPDATEABLE_REASONS.get(detect_variant(), _NON_UPDATEABLE_REASONS['unknown'])
def run_update(ydl):
"""
Update the program file with the latest version from the repository
Returns whether the program should terminate
"""
JSON_URL = 'https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest'
def report_error(msg, expected=False):
ydl.report_error(msg, tb='' if expected else None)
def report_unable(action, expected=False):
report_error(f'Unable to {action}', expected)
def report_permission_error(file):
report_unable(f'write to {file}; Try running as administrator', True)
def report_network_error(action, delim=';'):
report_unable(f'{action}{delim} Visit https://github.com/yt-dlp/yt-dlp/releases/latest', True)
def calc_sha256sum(path):
h = hashlib.sha256()
b = bytearray(128 * 1024)
mv = memoryview(b)
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()
# Download and check versions info
try:
version_info = ydl._opener.open(JSON_URL).read().decode()
version_info = json.loads(version_info)
except Exception:
return report_network_error('obtain version info', delim='; Please try again later or')
def version_tuple(version_str):
return tuple(map(int, version_str.split('.')))
version_id = version_info['tag_name']
ydl.to_screen(f'Latest version: {version_id}, Current version: {__version__}')
if version_tuple(__version__) >= version_tuple(version_id):
ydl.to_screen(f'yt-dlp is up to date ({__version__})')
return
err = is_non_updateable()
if err:
return report_error(err, True)
# sys.executable is set to the full pathname of the exe-file for py2exe
# though symlinks are not followed so that we need to do this manually
# with help of realpath
filename = compat_realpath(sys.executable if hasattr(sys, 'frozen') else sys.argv[0])
ydl.to_screen(f'Current Build Hash {calc_sha256sum(filename)}')
ydl.to_screen(f'Updating to version {version_id} ...')
version_labels = {
'zip_3': '',
'win_exe_64': '.exe',
'py2exe_64': '_min.exe',
'win_exe_32': '_x86.exe',
'mac_exe_64': '_macos',
}
def get_bin_info(bin_or_exe, version):
label = version_labels[f'{bin_or_exe}_{version}']
return next((i for i in version_info['assets'] if i['name'] == 'yt-dlp%s' % label), {})
def get_sha256sum(bin_or_exe, version):
filename = 'yt-dlp%s' % version_labels[f'{bin_or_exe}_{version}']
urlh = next(
(i for i in version_info['assets'] if i['name'] in ('SHA2-256SUMS')),
{}).get('browser_download_url')
if not urlh:
return None
hash_data = ydl._opener.open(urlh).read().decode()
return dict(ln.split()[::-1] for ln in hash_data.splitlines()).get(filename)
if not os.access(filename, os.W_OK):
return report_permission_error(filename)
# PyInstaller
variant = detect_variant()
if variant in ('win_exe', 'py2exe'):
directory = os.path.dirname(filename)
if not os.access(directory, os.W_OK):
return report_permission_error(directory)
try:
if os.path.exists(filename + '.old'):
os.remove(filename + '.old')
except OSError:
return report_unable('remove the old version')
try:
arch = platform.architecture()[0][:2]
url = get_bin_info(variant, arch).get('browser_download_url')
if not url:
return report_network_error('fetch updates')
urlh = ydl._opener.open(url)
newcontent = urlh.read()
urlh.close()
except OSError:
return report_network_error('download latest version')
try:
with open(filename + '.new', 'wb') as outf:
outf.write(newcontent)
except OSError:
return report_permission_error(f'{filename}.new')
expected_sum = get_sha256sum(variant, arch)
if not expected_sum:
ydl.report_warning('no hash information found for the release')
elif calc_sha256sum(filename + '.new') != expected_sum:
report_network_error('verify the new executable')
try:
os.remove(filename + '.new')
except OSError:
return report_unable('remove corrupt download')
try:
os.rename(filename, filename + '.old')
except OSError:
return report_unable('move current version')
try:
os.rename(filename + '.new', filename)
except OSError:
report_unable('overwrite current version')
os.rename(filename + '.old', filename)
return
try:
# Continues to run in the background
Popen(
'ping 127.0.0.1 -n 5 -w 1000 & del /F "%s.old"' % filename,
shell=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
ydl.to_screen('Updated yt-dlp to version %s' % version_id)
return True # Exit app
except OSError:
report_unable('delete the old version')
elif variant in ('zip', 'mac_exe'):
pack_type = '3' if variant == 'zip' else '64'
try:
url = get_bin_info(variant, pack_type).get('browser_download_url')
if not url:
return report_network_error('fetch updates')
urlh = ydl._opener.open(url)
newcontent = urlh.read()
urlh.close()
except OSError:
return report_network_error('download the latest version')
expected_sum = get_sha256sum(variant, pack_type)
if not expected_sum:
ydl.report_warning('no hash information found for the release')
elif hashlib.sha256(newcontent).hexdigest() != expected_sum:
return report_network_error('verify the new package')
try:
with open(filename, 'wb') as outf:
outf.write(newcontent)
except OSError:
return report_unable('overwrite current version')
ydl.to_screen('Updated yt-dlp to version %s; Restart yt-dlp to use the new version' % version_id)
return
assert False, f'Unhandled variant: {variant}'
# Deprecated
def update_self(to_screen, verbose, opener):
printfn = to_screen
write_string(
'DeprecationWarning: "yt_dlp.update.update_self" is deprecated and may be removed in a future version. '
'Use "yt_dlp.update.run_update(ydl)" instead\n')
class FakeYDL():
_opener = opener
to_screen = printfn
@staticmethod
def report_warning(msg, *args, **kwargs):
return printfn('WARNING: %s' % msg, *args, **kwargs)
@staticmethod
def report_error(msg, tb=None):
printfn('ERROR: %s' % msg)
if not verbose:
return
if tb is None:
# Copied from YoutubeDl.trouble
if sys.exc_info()[0]:
tb = ''
if hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
tb += ''.join(traceback.format_exception(*sys.exc_info()[1].exc_info))
tb += encode_compat_str(traceback.format_exc())
else:
tb_data = traceback.format_list(traceback.extract_stack())
tb = ''.join(tb_data)
if tb:
printfn(tb)
return run_update(FakeYDL())
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