mirror of
https://github.com/l1ving/youtube-dl
synced 2024-12-31 00:32:52 +08:00
101 lines
2.8 KiB
Python
101 lines
2.8 KiB
Python
from __future__ import unicode_literals, print_function
|
|
|
|
from inspect import getsource
|
|
import io
|
|
import os
|
|
from os.path import dirname as dirn
|
|
import sys
|
|
|
|
print('WARNING: Lazy loading extractors is an experimental feature that may not always work', file=sys.stderr)
|
|
|
|
sys.path.insert(0, dirn(dirn((os.path.abspath(__file__)))))
|
|
|
|
lazy_extractors_filename = sys.argv[1]
|
|
if os.path.exists(lazy_extractors_filename):
|
|
os.remove(lazy_extractors_filename)
|
|
|
|
from youtube_dl.extractor import _ALL_CLASSES
|
|
from youtube_dl.extractor.common import InfoExtractor, SearchInfoExtractor
|
|
|
|
with open('devscripts/lazy_load_template.py', 'rt') as f:
|
|
module_template = f.read()
|
|
|
|
module_contents = [
|
|
module_template + '\n' + getsource(InfoExtractor.suitable) + '\n',
|
|
'class LazyLoadSearchExtractor(LazyLoadExtractor):\n pass\n']
|
|
|
|
ie_template = '''
|
|
class {name}({bases}):
|
|
_VALID_URL = {valid_url!r}
|
|
_module = '{module}'
|
|
'''
|
|
|
|
make_valid_template = '''
|
|
@classmethod
|
|
def _make_valid_url(cls):
|
|
return {valid_url!r}
|
|
'''
|
|
|
|
|
|
def get_base_name(base):
|
|
if base is InfoExtractor:
|
|
return 'LazyLoadExtractor'
|
|
elif base is SearchInfoExtractor:
|
|
return 'LazyLoadSearchExtractor'
|
|
else:
|
|
return base.__name__
|
|
|
|
|
|
def build_lazy_ie(ie, name):
|
|
valid_url = getattr(ie, '_VALID_URL', None)
|
|
s = ie_template.format(
|
|
name=name,
|
|
bases=', '.join(map(get_base_name, ie.__bases__)),
|
|
valid_url=valid_url,
|
|
module=ie.__module__)
|
|
if ie.suitable.__func__ is not InfoExtractor.suitable.__func__:
|
|
s += '\n' + getsource(ie.suitable)
|
|
if hasattr(ie, '_make_valid_url'):
|
|
# search extractors
|
|
s += make_valid_template.format(valid_url=ie._make_valid_url())
|
|
return s
|
|
|
|
|
|
# find the correct sorting and add the required base classes so that sublcasses
|
|
# can be correctly created
|
|
classes = _ALL_CLASSES[:-1]
|
|
ordered_cls = []
|
|
while classes:
|
|
for c in classes[:]:
|
|
bases = set(c.__bases__) - set((object, InfoExtractor, SearchInfoExtractor))
|
|
stop = False
|
|
for b in bases:
|
|
if b not in classes and b not in ordered_cls:
|
|
if b.__name__ == 'GenericIE':
|
|
exit()
|
|
classes.insert(0, b)
|
|
stop = True
|
|
if stop:
|
|
break
|
|
if all(b in ordered_cls for b in bases):
|
|
ordered_cls.append(c)
|
|
classes.remove(c)
|
|
break
|
|
ordered_cls.append(_ALL_CLASSES[-1])
|
|
|
|
names = []
|
|
for ie in ordered_cls:
|
|
name = ie.__name__
|
|
src = build_lazy_ie(ie, name)
|
|
module_contents.append(src)
|
|
if ie in _ALL_CLASSES:
|
|
names.append(name)
|
|
|
|
module_contents.append(
|
|
'_ALL_CLASSES = [{0}]'.format(', '.join(names)))
|
|
|
|
module_src = '\n'.join(module_contents) + '\n'
|
|
|
|
with io.open(lazy_extractors_filename, 'wt', encoding='utf-8') as f:
|
|
f.write(module_src)
|