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#!/usr/bin/env python3
from __future__ import annotations
import contextlib
import io
import json
import hashlib
import pathlib
import urllib.request
import zipfile
TEMPLATE = '''\
# This file is generated by devscripts/update_ejs.py. DO NOT MODIFY!
VERSION = {version!r}
HASHES = {{
{hash_mapping}
}}
'''
PREFIX = ' "yt-dlp-ejs=='
BASE_PATH = pathlib.Path(__file__).parent.parent
PYPROJECT_PATH = BASE_PATH / 'pyproject.toml'
PACKAGE_PATH = BASE_PATH / 'yt_dlp/extractor/youtube/jsc/_builtin/vendor'
RELEASE_URL = 'https://api.github.com/repos/yt-dlp/ejs/releases/latest'
ASSETS = {
'yt.solver.lib.js': False,
'yt.solver.lib.min.js': False,
'yt.solver.deno.lib.js': True,
'yt.solver.bun.lib.js': True,
'yt.solver.core.min.js': False,
'yt.solver.core.js': True,
}
MAKEFILE_PATH = BASE_PATH / 'Makefile'
def request(url: str):
return contextlib.closing(urllib.request.urlopen(url))
def makefile_variables(
version: str | None = None,
name: str | None = None,
digest: str | None = None,
data: bytes | None = None,
keys_only: bool = False,
) -> dict[str, str | None]:
assert keys_only or all(arg is not None for arg in (version, name, digest, data))
return {
'EJS_VERSION': None if keys_only else version,
'EJS_WHEEL_NAME': None if keys_only else name,
'EJS_WHEEL_HASH': None if keys_only else digest,
'EJS_PY_FOLDERS': None if keys_only else list_wheel_contents(data, 'py', files=False),
'EJS_PY_FILES': None if keys_only else list_wheel_contents(data, 'py', folders=False),
'EJS_JS_FOLDERS': None if keys_only else list_wheel_contents(data, 'js', files=False),
'EJS_JS_FILES': None if keys_only else list_wheel_contents(data, 'js', folders=False),
}
def list_wheel_contents(
wheel_data: bytes,
suffix: str | None = None,
folders: bool = True,
files: bool = True,
) -> str:
assert folders or files, 'at least one of "folders" or "files" must be True'
with zipfile.ZipFile(io.BytesIO(wheel_data)) as zipf:
path_gen = (zinfo.filename for zinfo in zipf.infolist())
filtered = filter(lambda path: path.startswith('yt_dlp_ejs/'), path_gen)
if suffix:
filtered = filter(lambda path: path.endswith(f'.{suffix}'), filtered)
files_list = list(filtered)
if not folders:
return ' '.join(files_list)
folders_list = list(dict.fromkeys(path.rpartition('/')[0] for path in files_list))
if not files:
return ' '.join(folders_list)
return ' '.join(folders_list + files_list)
def main():
current_version = None
with PYPROJECT_PATH.open() as file:
for line in file:
if not line.startswith(PREFIX):
continue
current_version, _, _ = line.removeprefix(PREFIX).partition('"')
if not current_version:
print('yt-dlp-ejs dependency line could not be found')
return
makefile_info = makefile_variables(keys_only=True)
prefixes = tuple(f'{key} = ' for key in makefile_info)
with MAKEFILE_PATH.open() as file:
for line in file:
if not line.startswith(prefixes):
continue
key, _, val = line.partition(' = ')
makefile_info[key] = val.rstrip()
with request(RELEASE_URL) as resp:
info = json.load(resp)
version = info['tag_name']
if version == current_version:
print(f'yt-dlp-ejs is up to date! ({version})')
return
print(f'Updating yt-dlp-ejs from {current_version} to {version}')
hashes = []
wheel_info = {}
for asset in info['assets']:
name = asset['name']
is_wheel = name.startswith('yt_dlp_ejs-') and name.endswith('.whl')
if not is_wheel and name not in ASSETS:
continue
with request(asset['browser_download_url']) as resp:
data = resp.read()
# verify digest from github
digest = asset['digest']
algo, _, expected = digest.partition(':')
hexdigest = hashlib.new(algo, data).hexdigest()
assert hexdigest == expected, f'downloaded attest mismatch ({hexdigest!r} != {expected!r})'
if is_wheel:
wheel_info = makefile_variables(version, name, digest, data)
continue
# calculate sha3-512 digest
asset_hash = hashlib.sha3_512(data).hexdigest()
hashes.append(f' {name!r}: {asset_hash!r},')
if ASSETS[name]:
(PACKAGE_PATH / name).write_bytes(data)
hash_mapping = '\n'.join(hashes)
for asset_name in ASSETS:
assert asset_name in hash_mapping, f'{asset_name} not found in release'
assert all(wheel_info.get(key) for key in makefile_info), 'wheel info not found in release'
(PACKAGE_PATH / '_info.py').write_text(TEMPLATE.format(
version=version,
hash_mapping=hash_mapping,
))
content = PYPROJECT_PATH.read_text()
updated = content.replace(PREFIX + current_version, PREFIX + version)
PYPROJECT_PATH.write_text(updated)
makefile = MAKEFILE_PATH.read_text()
for key in wheel_info:
makefile = makefile.replace(f'{key} = {makefile_info[key]}', f'{key} = {wheel_info[key]}')
MAKEFILE_PATH.write_text(makefile)
if __name__ == '__main__':
main()
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