mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2024-11-30 14:50:36 -05:00
128 lines
4.3 KiB
Python
128 lines
4.3 KiB
Python
#!/usr/bin/env python3
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# Allow direct execution
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import os
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import shutil
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import sys
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sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from inspect import getsource
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from devscripts.utils import get_filename_args, read_file, write_file
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NO_ATTR = object()
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STATIC_CLASS_PROPERTIES = [
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'IE_NAME', '_ENABLED', '_VALID_URL', # Used for URL matching
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'_WORKING', 'IE_DESC', '_NETRC_MACHINE', 'SEARCH_KEY', # Used for --extractor-descriptions
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'age_limit', # Used for --age-limit (evaluated)
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'_RETURN_TYPE', # Accessed in CLI only with instance (evaluated)
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]
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CLASS_METHODS = [
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'ie_key', 'suitable', '_match_valid_url', # Used for URL matching
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'working', 'get_temp_id', '_match_id', # Accessed just before instance creation
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'description', # Used for --extractor-descriptions
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'is_suitable', # Used for --age-limit
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'supports_login', 'is_single_video', # Accessed in CLI only with instance
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]
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IE_TEMPLATE = '''
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class {name}({bases}):
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_module = {module!r}
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'''
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MODULE_TEMPLATE = read_file('devscripts/lazy_load_template.py')
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def main():
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lazy_extractors_filename = get_filename_args(default_outfile='yt_dlp/extractor/lazy_extractors.py')
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if os.path.exists(lazy_extractors_filename):
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os.remove(lazy_extractors_filename)
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_ALL_CLASSES = get_all_ies() # Must be before import
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from yt_dlp.extractor.common import InfoExtractor, SearchInfoExtractor
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DummyInfoExtractor = type('InfoExtractor', (InfoExtractor,), {'IE_NAME': NO_ATTR})
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module_src = '\n'.join((
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MODULE_TEMPLATE,
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' _module = None',
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*extra_ie_code(DummyInfoExtractor),
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'\nclass LazyLoadSearchExtractor(LazyLoadExtractor):\n pass\n',
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*build_ies(_ALL_CLASSES, (InfoExtractor, SearchInfoExtractor), DummyInfoExtractor),
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))
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write_file(lazy_extractors_filename, f'{module_src}\n')
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def get_all_ies():
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PLUGINS_DIRNAME = 'ytdlp_plugins'
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BLOCKED_DIRNAME = f'{PLUGINS_DIRNAME}_blocked'
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if os.path.exists(PLUGINS_DIRNAME):
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# os.rename cannot be used, e.g. in Docker. See https://github.com/yt-dlp/yt-dlp/pull/4958
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shutil.move(PLUGINS_DIRNAME, BLOCKED_DIRNAME)
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try:
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from yt_dlp.extractor.extractors import _ALL_CLASSES
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finally:
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if os.path.exists(BLOCKED_DIRNAME):
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shutil.move(BLOCKED_DIRNAME, PLUGINS_DIRNAME)
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return _ALL_CLASSES
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def extra_ie_code(ie, base=None):
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for var in STATIC_CLASS_PROPERTIES:
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val = getattr(ie, var)
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if val != (getattr(base, var) if base else NO_ATTR):
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yield f' {var} = {val!r}'
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yield ''
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for name in CLASS_METHODS:
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f = getattr(ie, name)
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if not base or f.__func__ != getattr(base, name).__func__:
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yield getsource(f)
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def build_ies(ies, bases, attr_base):
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names = []
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for ie in sort_ies(ies, bases):
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yield build_lazy_ie(ie, ie.__name__, attr_base)
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if ie in ies:
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names.append(ie.__name__)
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yield f'\n_ALL_CLASSES = [{", ".join(names)}]'
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def sort_ies(ies, ignored_bases):
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"""find the correct sorting and add the required base classes so that subclasses can be correctly created"""
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classes, returned_classes = ies[:-1], set()
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assert ies[-1].__name__ == 'GenericIE', 'Last IE must be GenericIE'
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while classes:
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for c in classes[:]:
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bases = set(c.__bases__) - {object, *ignored_bases}
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restart = False
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for b in sorted(bases, key=lambda x: x.__name__):
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if b not in classes and b not in returned_classes:
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assert b.__name__ != 'GenericIE', 'Cannot inherit from GenericIE'
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classes.insert(0, b)
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restart = True
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if restart:
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break
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if bases <= returned_classes:
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yield c
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returned_classes.add(c)
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classes.remove(c)
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break
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yield ies[-1]
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def build_lazy_ie(ie, name, attr_base):
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bases = ', '.join({
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'InfoExtractor': 'LazyLoadExtractor',
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'SearchInfoExtractor': 'LazyLoadSearchExtractor',
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}.get(base.__name__, base.__name__) for base in ie.__bases__)
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s = IE_TEMPLATE.format(name=name, module=ie.__module__, bases=bases)
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return s + '\n'.join(extra_ie_code(ie, attr_base))
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if __name__ == '__main__':
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main()
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