1 from __future__ import unicode_literals, print_function
3 from inspect import getsource
5 from os.path import dirname as dirn
8 print('WARNING: Lazy loading extractors is an experimental feature that may not always work', file=sys.stderr)
10 sys.path.insert(0, dirn(dirn((os.path.abspath(__file__)))))
12 lazy_extractors_filename = sys.argv[1]
13 if os.path.exists(lazy_extractors_filename):
14 os.remove(lazy_extractors_filename)
16 from youtube_dl.extractor import _ALL_CLASSES
17 from youtube_dl.extractor.common import InfoExtractor
19 with open('devscripts/lazy_load_template.py', 'rt') as f:
20 module_template = f.read()
22 module_contents = [module_template + '\n' + getsource(InfoExtractor.suitable)]
25 class {name}(LazyLoadExtractor):
26 _VALID_URL = {valid_url!r}
30 make_valid_template = '''
32 def _make_valid_url(cls):
37 def build_lazy_ie(ie, name):
38 valid_url = getattr(ie, '_VALID_URL', None)
39 s = ie_template.format(
43 if ie.suitable.__func__ is not InfoExtractor.suitable.__func__:
44 s += '\n' + getsource(ie.suitable)
45 if hasattr(ie, '_make_valid_url'):
47 s += make_valid_template.format(valid_url=ie._make_valid_url())
51 for ie in list(sorted(_ALL_CLASSES[:-1], key=lambda cls: cls.ie_key())) + _ALL_CLASSES[-1:]:
52 name = ie.ie_key() + 'IE'
53 src = build_lazy_ie(ie, name)
54 module_contents.append(src)
57 module_contents.append(
58 '_ALL_CLASSES = [{0}]'.format(', '.join(names)))
60 module_src = '\n'.join(module_contents) + '\n'
62 with open(lazy_extractors_filename, 'wt') as f: