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https://github.com/yt-dlp/yt-dlp.git
synced 2024-11-07 20:30:41 -05:00
Add experimental support for lazy loading the info extractors
'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.
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5 changed files with 99 additions and 8 deletions
1
.gitignore
vendored
1
.gitignore
vendored
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@ -13,6 +13,7 @@ README.txt
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youtube-dl.1
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youtube-dl.bash-completion
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youtube-dl.fish
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youtube_dl/extractor/lazy_extractors.py
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youtube-dl
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youtube-dl.exe
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youtube-dl.tar.gz
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8
Makefile
8
Makefile
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@ -1,7 +1,7 @@
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all: youtube-dl README.md CONTRIBUTING.md README.txt youtube-dl.1 youtube-dl.bash-completion youtube-dl.zsh youtube-dl.fish supportedsites
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clean:
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rm -rf youtube-dl.1.temp.md youtube-dl.1 youtube-dl.bash-completion README.txt MANIFEST build/ dist/ .coverage cover/ youtube-dl.tar.gz youtube-dl.zsh youtube-dl.fish *.dump *.part *.info.json *.mp4 *.flv *.mp3 *.avi CONTRIBUTING.md.tmp ISSUE_TEMPLATE.md.tmp youtube-dl youtube-dl.exe
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rm -rf youtube-dl.1.temp.md youtube-dl.1 youtube-dl.bash-completion README.txt MANIFEST build/ dist/ .coverage cover/ youtube-dl.tar.gz youtube-dl.zsh youtube-dl.fish youtube_dl/extractor/lazy_extractors.py *.dump *.part *.info.json *.mp4 *.flv *.mp3 *.avi CONTRIBUTING.md.tmp ISSUE_TEMPLATE.md.tmp youtube-dl youtube-dl.exe
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find . -name "*.pyc" -delete
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find . -name "*.class" -delete
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@ -88,6 +88,12 @@ youtube-dl.fish: youtube_dl/*.py youtube_dl/*/*.py devscripts/fish-completion.in
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fish-completion: youtube-dl.fish
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lazy-extractors: youtube_dl/extractor/lazy_extractors.py
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_EXTRACTOR_FILES != find youtube_dl/extractor -iname '*.py' -and -not -iname 'lazy_extractors.py'
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youtube_dl/extractor/lazy_extractors.py: devscripts/make_lazy_extractors.py devscripts/lazy_load_template.py $(_EXTRACTOR_FILES)
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$(PYTHON) devscripts/make_lazy_extractors.py $@
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youtube-dl.tar.gz: youtube-dl README.md README.txt youtube-dl.1 youtube-dl.bash-completion youtube-dl.zsh youtube-dl.fish
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@tar -czf youtube-dl.tar.gz --transform "s|^|youtube-dl/|" --owner 0 --group 0 \
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--exclude '*.DS_Store' \
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devscripts/lazy_load_template.py
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devscripts/lazy_load_template.py
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# flake8: noqa
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from __future__ import unicode_literals
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import re
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class LazyLoadExtractor(object):
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_module = None
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@classmethod
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def ie_key(cls):
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return cls.__name__[:-2]
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def __new__(cls):
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mod = __import__(cls._module, fromlist=(cls.__name__,))
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real_cls = getattr(mod, cls.__name__)
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return real_cls.__new__(real_cls)
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devscripts/make_lazy_extractors.py
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devscripts/make_lazy_extractors.py
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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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@ -1,13 +1,17 @@
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from __future__ import unicode_literals
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from .extractors import *
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try:
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from .lazy_extractors import *
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from .lazy_extractors import _ALL_CLASSES
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except ImportError:
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from .extractors import *
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_ALL_CLASSES = [
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klass
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for name, klass in globals().items()
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if name.endswith('IE') and name != 'GenericIE'
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]
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_ALL_CLASSES.append(GenericIE)
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_ALL_CLASSES = [
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klass
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for name, klass in globals().items()
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if name.endswith('IE') and name != 'GenericIE'
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]
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_ALL_CLASSES.append(GenericIE)
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def gen_extractor_classes():
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