mirror of
https://github.com/l1ving/youtube-dl
synced 2024-11-20 18:02:53 +08:00
779822d945
'make lazy-extractors' creates the youtube_dl/extractor/lazy_extractors.py (imported by youtube_dl/extractor/__init__.py), which contains simplified classes that only have the 'suitable' class method and that load the appropiate class with the '__new__' method when a instance is created.
64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
from __future__ import unicode_literals, print_function
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from inspect import getsource
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import os
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from os.path import dirname as dirn
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import sys
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print('WARNING: Lazy loading extractors is an experimental feature that may not always work', file=sys.stderr)
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sys.path.insert(0, dirn(dirn((os.path.abspath(__file__)))))
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lazy_extractors_filename = sys.argv[1]
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if os.path.exists(lazy_extractors_filename):
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os.remove(lazy_extractors_filename)
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from youtube_dl.extractor import _ALL_CLASSES
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from youtube_dl.extractor.common import InfoExtractor
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with open('devscripts/lazy_load_template.py', 'rt') as f:
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module_template = f.read()
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module_contents = [module_template + '\n' + getsource(InfoExtractor.suitable)]
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ie_template = '''
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class {name}(LazyLoadExtractor):
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_VALID_URL = {valid_url!r}
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_module = '{module}'
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'''
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make_valid_template = '''
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@classmethod
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def _make_valid_url(cls):
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return {!r}
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'''
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def build_lazy_ie(ie, name):
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valid_url = getattr(ie, '_VALID_URL', None)
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s = ie_template.format(
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name=name,
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valid_url=valid_url,
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module=ie.__module__)
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if ie.suitable.__func__ is not InfoExtractor.suitable.__func__:
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s += getsource(ie.suitable)
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if hasattr(ie, '_make_valid_url'):
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# search extractors
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s += make_valid_template.format(ie._make_valid_url())
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return s
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names = []
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for ie in _ALL_CLASSES:
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name = ie.ie_key() + 'IE'
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src = build_lazy_ie(ie, name)
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module_contents.append(src)
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names.append(name)
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module_contents.append(
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'_ALL_CLASSES = [{}]'.format(', '.join(names)))
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module_src = '\n'.join(module_contents)
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with open(lazy_extractors_filename, 'wt') as f:
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f.write(module_src)
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